Dunham-Bush - DB Aire Installation Operation Manual

Form No: MM0704A-1212

INSTALLATION, OPERATION & MAINTENANCE MANUAL

PRECISION ENVIRONMENTAL CONTROL UNIT

DB-Aire II Systems

407C R 407C

50/60 Hz DB-Aire II (Indoor Unit)

DB-Aire II (Outdoor Unit)

CAUTION   

The manual is to to be retained for the the entire service life of the unit Read the manual carefully before carrying carrying out any operation on the unit The control is used exclusively exclusively for the purpose for which which it is intended. Incorrect use of the the control shall release the manufacturer from any liability

This manual is prepared to enable the user to carry out only the operation that can be made with the panels closed. The panel key which is supplied with the unit must be kept by the person responsible for maintenance. For identification of the unit (model and serial no.) in case of the necessity for assistance or spare parts, locate the identification label on the outside of the unit.

TABLE OF CONTENTS Page No GENERAL INFORMATION Nomenclature .................................................................. ..................................................................................................... .................................................................... ................................................................... ................................................. ............... 3 Performance And Technical Data ............................................................................... ............................................................................................................ ................................................................. ............................................ ........ 4 Dual Coils Option ..................................................................................................... ................................................................................................................................ ............................................................... ................................................. ............. 8 Electrical Data ................................................................................................... ............................................................................................................................... ................................................................ ....................................................... ................... 9 Dimensional Data .............................................................................................. .......................................................................................................................... ................................................................ ..................................................... ................. 11 Remote Air-Cooled Condensers ............................................................................................ .......................................................................................................................... ............................................................ .............................. 20 INSTALLATION Inspection ....................................................................... ............................................................................................................ ................................................................ ............................................................... .................................................... ................ 21 Transport .................................................................... ........................................................................................................ .............................................................. .............................................................. .......................................................... ...................... 21 Operating Limits ...................................................................... ............................................................................................................ .................................................................. ................................................................ ......................................... ..... 21 Locating The Unit And Installation Clearance ................................................................................. .................................................................................................................. ................................................... .................. 21 Dismantling Unit Frame ..................................................... .......................................................................................... .................................................................. ................................................................. ............................................... ........... 22 Removing Fixed Panels ...................................................................................................... .................................................................................................................................. ............................................................... ................................... 23 Removing Filters ...................................................................... ............................................................................................................ ................................................................. ............................................................... ......................................... ..... 24 Installing Discharge Plenum (Optional) ................. ...................................................... ....................................................................... ...................................................................... ...................................................... .................. 24 Belt Tension Inspection G uide ................................................................................... .................................................................................................................. ................................................................... ......................................... ..... 25 Air-Cooled Piping ................................................... ........................................................................................ ................................................................. ................................................................ ........................................................... ....................... 26 Pipe Supports................................................................................. ................................................................................................................. ................................................................. .................................................................... ................................... 26 Field Provided Piping And Wiring .................................... .......................................................................... ................................................................... ................................................................. ................................................ ............ 26 Long Refrigeration Piping ........................................................ .............................................................................................. .................................................................. ................................................................ ......................................... ..... 27 Leak Test (System Pressure Test) ................................... ........................................................................ .................................................................. ................................................................. ................................................ ............ 29 Vacuum Test And Dehydration .............................................................................. .......................................................................................................... ................................................................ ................................................ ............ 29 Charging................................................................... ....................................................................................................... ................................................................ ................................................................ .......................................................... ...................... 29 System Check For Overcharging .................................................................... ................................................................................................. ................................................................. ...................................................... .................. 30 Water Connections....................................................................... ........................................................................................................... ................................................................... .................................................................. ................................... 30 Humidifier (Optional) ..................................................................... ......................................................................................................... ........................................................................ ................................................................. ............................. 31 Modulating Hot Gas Reheat For DX System ....................................................................................... ......................................................................................................................... .............................................. ............ 32 Remote Air Cooled Condenser (DBRC)................................................................... ................................................................................................... .................................................................... .......................................... ...... 32 Operation .................................. ...................................................................... ........................................................................ ................................................................ ................................................................ ..................................................... ................. 32 Dimensional Clearance - Remote Air Cooled Condenser (DBRC) ..................................................................... .................................................................................................... ............................... 33 OPERATION Electrical Connections .................................................................. ....................................................................................................... ................................................................... ................................................................. ................................... 34 Check For Correct Phasing .................................................... ........................................................................................ ................................................................... ................................................................... ......................................... ..... 34 Under-Floor Water-Detection Probe (Optional)....................................... .............................................................................. ................................................................... .................................................... ........................ 34 Alarm Processor .................................. ........................................................................ ........................................................................... ................................................................ ............................................................... ......................................... ..... 34 Control Logic ................................... ....................................................................... ........................................................................ ................................................................ ................................................................ ............................................... ........... 35 Piping Schematic ..................................... ........................................................................... ......................................................................... ....................................................................... ................................................................. ............................. 37 MAINTENANCE INSTRUCTIONS Maintenance .................................. ...................................................................... ........................................................................ .................................................................. .................................................................. ............................................... ........... 40 Troubleshooting Chart.......................................................................... ......................................................................................................... ................................................................. ............................................................... ............................. 41 Sample Log Sheet ...................................................... .......................................................................................... ................................................................... ................................................................... ..................................................... ................. 43 GUIDE SPECIFICATIONS ................................................................... ....................................................................................................... ............................................................... .......................................................... ............................... 44

-2-

GENERAL INFORMATION NOMENCLATURE INDOOR UNIT String

1

2

3

4

5

6

7

8

9 10 11 12 13 14 15 16 17 18 19 20 21 22

D

B

A

D

0

2

P

A

U

D

B

H

G

S

K

P

S

E

V

N

1

Q

22

1 & 2 DB-AIRE II 3

SYSTEM A = Air-Cooled (DX) C = Chilled Water (CW) D = Dual Coils (DX+CW)* R = Air-Cooled DX with Hot Gas Reheat

21

*Model 26 Dual Coils not available

4

CONFIGURATION U = Upflow D = Downflow

5 & 6 MODEL # 02 03 04 05 07 09 11 13 14 16 19 22 26

7

Std Airflow, ESP Motor hp(kW) 3 CFM(m /h) (in WG) DX or CW / Dual Dual Coils System System 1, 500 (2,548) 0.3 1.0 (0.75)/1.0 (0.75) 1, 500 (2,548) 0.3 1.0 (0.75)/1.0 (0.75) 2,000 (3,398) 0.3 1.0 (0.75)/ 1.5 (1.1) 2,500 (4,247) 0.3 2.0 (1.5)/ 2.0 (1.5) 4,000 (6,796) 0.5 2.0 (1.5)/ 2.0 (1.5) 5,000 (8,495) 0.5 3.0 (2.2)/ 4.0 (3.0) 6,000 (10,194) 0.5 4.0 (3.0)/ 5.5 (4.1) 6,500 (11,043) 0.5 5.5 (4.1)/ 5.5 (4.1) 8,000 (13,592) 0.5 4.0 (3.0)/ 4.0 (3.0) 10,000 (16,989) 0.5 5.5 (4.1)/ 7.5 (5.6) 11,000 (18,688) 0.5 7.5 (5.6)/ 7.5 (5.6) 11,000 (18,688) 0.5 7.5 (5.6)/ 10.0 (7.5) 13,000 (22,086) 0.5 10.0 (7.5)/ Not Applicable

ModBus RTU RS485 Communication port.

20 19

18

Model 02 and 03 Air-Cooled Units 60Hz option not available. **Please consult factory for these special voltages. It requires additional cost and longer lead time.

12

HUMIDIFIER OPTION H = Humidifier (water conductivity 75 to 350 μS/cm)*** N = Not Selected

ELECTRIC HEATER OPTION E = Standard Electric Heater

(Air-Cooled DX with Hot Gas Reheat i.e. DBRU/D only)

16

DISCHARGE PLENUM OPTION (for Upflow model only) B = Discharge Plenum N = Not Selected

VFD OPTION V = VFD N = Not Selected

N = Electric Heaters Not Furnished

17

11

FUTURE OPTION N = Not Selected

(All models EXCEPT Air-Cooled DX with Hot Gas Reheat i.e. DBRU/D)

8 & 9 VOLTAGE OPTIONS AU = 380~415V/3ph/50Hz AR = 460V/3ph/60Hz CD = 208V/3ph/60Hz** AN = 230V/3ph/60Hz** EF = 380V/3ph/60Hz**

DRAIN PAN OPTIONS D = Standard GI Painted T = Stainless Steel

BMS COMMUNICATION OPTIONS 1 = ModBus RTU RS485**** 2 = ModBus TCPIP 3 = BACnet TCPIP 4 = BACnet MSTP 5 = BACnet PTP 6 = LONworks 7 = GSM Modem 8 = SNMP N = Not Selected

**** Standard unit comes with one

REFRIGERANT P = R407C / Dual Coils System System / DX with with Hot Gas Reheat N = R22 for DX, Dual Coils(DX+CW) & DX with Hot Gas Gas Reheat/ Chilled Water Unit

10

OTHER SPECIAL OPTION Q = Special Option N = Not Selected

15

14

13

SMOKE DETECTOR OPTION S = Smoke Detector N = Not selected

UNDER FLOOR WATER DETECTOR OPTION P = Pinhole Probe N = Not selected

PANEL INSULATION OPTIONS K = Double Skin Panel F = Insulflex Insulation Single Skin Panel N = Not Selected. Standard Fiberglass Insulation Panel

EVAPORATOR CONTROL OPTIONS N = Standard Thermal Expansion Valve (TXV) S = Standard Thermal Expansion Valve (TXV) & Liquid Line Solenoid Valve X = Electronic Expansion Valve (EEV)

HOT GAS BYPASS OPTION G = Hot Gas Bypass N = Not Selected

***Please consult factory for other water conductivity.

Outdoor Unit Nomenclature (for Air Cooled DX-System/ Dual Coils System/ DX-System with Hot G as Reheat ) String

1

2

3

4

5

6

7

8

9

10

11

12

13

D

B

R

C

0

4

P

A

U

A

L

1

Q

13

1,2,3 & 4 AIR COOLED CONDENSER 5 & 6 MODEL 04 06 08 10 11 13 17 20 26 30 34 40 44

12

*with 220~240V/1ph/50,60Hz

11

10

8&9 7

REFRIGERANT P = R22 / R407C

OTHER SPECIAL OPTION Q = Special Option N = Not selected REFRIGERATION CIRCUIT(S) 1 = 1-Circuit (for standard indoor model 02-13) 2 = 2-Circuits (for standard indoor model 14-26)

BLACK PAINT (EXTERNAL) OPTION L = Black Paint on Unit External N = Not selected

CONDENSER FIN OPTIONS A = Standard Aluminium H = Hydrophilic C = Copper Fin

VOLTAGE OPTIONS AU = 380~415V/3ph/50Hz AR = 460V/3ph/60Hz CD = 208V/3ph/60Hz** AN = 230V/3ph/60Hz** EF = 380V/3ph/60Hz**

**Please consult factory for these special voltages. It requires additional cost and longer lead time.

-3-

GENERAL INFORMATION PERFORMANCE AND TECHNICAL DATA Air Cooled Dx System @ 35oC (95oF) Ambient Temperature - With or Without Hot Gas Reheat Model

Return Air 80°F/67°F/50% RH (27°C/19°C/50% RH)

63.8 (18.7)

89.6 (26.3)

131.7 (38.6)

Sensible Cooling Capacity

MBH (kW)

32.2 (9.4)

35.7 (10.5)

44.3 (13.0)

54.7 (16.0)

77.9 (22.8)

111.7 (32.7)

0.79

0.83

0.86

0.86

0.87

0.85

Total Cooling Capacity

MBH (kW)

34.7 (10.2)

38.8 (11.4)

49.7 (14.6)

58.2 (17.1)

80.9 (23.7)

119.3 (35.0)


MBH (kW)

30.7 (9.0)

35.1 (10.3)

44.8 (13.1)

53.8 (15.8)

75.6 (22.1)

109.8 (32.2)

0.90

0.90

0.90

0.93

0.93

0.92


MBH (kW)

32.7 (9.6)

36.3 (10.6)

46.5 (13.6)

54.6 (16.0)

80.2 (23.5)

118.3 (34.7)


MBH (kW)

30.0 (8.8)

33.7 (9.9)

43.8 (12.8)

52.6 (15.4)

75.3 (22.1)

108.8 (31.9)

0.92

0.93

0.94

0.96

0.94

0.92

1

1

1

1

1

1

Total Power Input (50Hz)

kW

3.4

3. 3.4

4. 4.7

5. 5.2

6. 6.5

10.2


kW

N/A

N/A

4.4

5. 5.4

6. 6.6

11.2

Hot Gas; Liquid Lines, 50Hz

Inch Inch

5/8 ; 1/2

5/8 ; 1/2

5/8 5/8 ; 1/2

5/8 ; 1/2

7/8 ; 1/2

7/8 ; 5/8


Inch Inch

N/A N/A

N/A N/A

5/8 5/8 ; 1/2 1/2

5/8 5/8 ; 1/2 1/2

7/8 7/8 ; 1/2 1/2

7/8 7/8 ; 1/2 1/2

10/8

10/8

10/8

10/8

15/15

15/15

Air Volume

CFM (m3/h)

1,500 (2,548)

1,500 (2,548)

2,000 (3,398)

2,500 (4,247)

4,000 (6,796)

5,000 (8,495)

External Static Pressure (ESP)

in H2O (Pa)

0.3 (75)

0.3 (75)

0.3 (75)

0.3 (75)

0.5 (125)

0.5 (125)

Motor (Standard Single Coil)

Hp (kW)

1.0 (0.75)

1.0 (0.75)

1.0 (0.75)

2.0 (1.5)

2.0 (1.5)

3.0 (2.2)

2

Face Area

ft (m2)

5.6 (0.5)

5.6 (0.5)

5.6 (0.5)

5.6 (0.5)

12.2 (1.1)

12.2 (1.1)

FPM (m/s)

270 (1.4)

270 (1.4)

360 (1.8)

450 (2.3)

327 (1.7)

409 (2.1)

7/8

7/ 7/8

7/8

7/8

7/ 7/8

7/8

Face Velocity Condensate Drain O.D

Filters (ASHRAE 52.5 MERV 8)

Reheat (Electric) N/A for DBRD/U Models Steam Humidifier (Optional)

DBAD/U 09 DBRD/U 09

51.3 (15.0)

Fan Size

Coil (DX)

DBAD/U 07 DBRD/U 07

42.9 (12.6)

Number of Compressor(s)

Fan & Motor (Indoor)

DBAD/U 05 DBRD/U 05

41.0 (12.0)

Sensible Heat Ratio (SHR)

Compressor

DBAD/U 04 DBRD/U 04

MBH (kW)



DBAD/U 03 DBRD/U 03



Return Air 75°F/62.5°F/50% RH (24°C/17°C/50% RH)

DBAD/U 02 DBRD/U 02

Inch

20" x 20" x 2"

Qty

2

2

2

2

N/A

N/A

20" x 20" x 4"

Qty

N/A

N/A

N/A

N/A

4

4

20" x 25" x 4"

Qty

N/A

N/A

N/A

N/A

N/A

N/A

3-Stages (rated at 415V)

MBH (kW)

20.5 (6.0)

20.5 (6.0)

20.5 (6.0)

20.5 (6.0)

41.0 (12.0)

41.0 (12.0)

Capacity (max.)

lbs/hr (kg/hr)

17 (8.0)

17 (8.0)

17 (8.0)

17 (8.0)

17 (8.0)

17 (8.0)

kW

6.0 6.0

6.0 6.0

6.0 6.0

6.0 6.0

6.0 6.0

6.0 6.0

dBA

56

56

57

57

62

63

Powe Powerr Inpu Inputt (max (max.) .)

Sound Pressure Level (at 2m distance, free field, downflow)

PHYSICAL DATA Height

H

mm (inch)

1944 (76.5)

1944 (76.5)

1944 (76.5)

1944 (76.5)

1944 (76.5)

1944 (76.5)

Width

W

mm (inch)

749 (29.5)

749 (29.5)

749 (29.5)

749 (29.5)

1464 (57.6)

1464 (57.6)

Depth

D

mm (inch)

874 (34.4)

874 (34.4)

874 (34.4)

874 (34.4)

874 (34.4)

874 (34.4)

DBAD/U

kg (lbs)

251 (552)

259 (570)

260 (572)

272 (598)

420 (924)

450 (990)

DBRD/U

kg (lbs)

265 (583)

273 (601)

274 (603)

286 (629)

442 (972)

472 (1038)

Weight

Notes: 1.) Add 457mm (18inch) to height of unit for Discharge Plenum (optional) – Upflow Models only 2.) Add 32kg (71lbs)- Model 02 to 05; 51kg(112 lbs)-Model 07 to 13; 80kg(176 lbs)- Model 14 to 26 to weight of unit for Discharge Plenum (optional)- Upflow Model only

-4-

GENERAL INFORMATION Air Cooled Dx System @ 35oC (95oF) Ambient Temperature - With Or Without Hot Gas Reheat DBAD/U 11 DBAD/U 13 DBAD/U 14 DBAD/U 16 DBAD/U 19 DBAD/U 22 DBAD/U 26 DBRD/U 11 DBRD/U 13 DBRD/U 14 DBRD/U 16 DBRD/U 19 DBRD/U 22 DBRD/U 26

Model



MBH (kW)

145.7 (42.7)

170.4 (49.9)

190.1 (55.7)

224.3 (65.7)

260.7 (76.4)

288.5 (84.5)

337.3 (98.8)


MBH (kW)

128.7 (37.7)

145.9 (42.8)

158.3 (46.4)

190.9 (55.9)

226.1 (66.2)

244.3 (71.6)

286.0 (83.8)

0.88

0.86

0.83

0.85

0.87

0.85

0.85


Return Air 75°F/62.5°F/50% RH (24°C/17°C/50% RH)


MBH (kW)

132.5 (38.8)

154.8 (45.4)

182.0 (53.3)

203.1 (59.5)

236.1 (69.2)

262.2 (76.8)

307.4 (90.1)


MBH (kW)

124.7 (36.5)

143.3 (42.0)

161.2 (47.2)

185.2 (54.3)

222.7 (65.3)

240.0 (70.3)

276.8 (81.1)

0.94

0.93

0.90

0.91

0.94

0.92

0.90




MBH (kW)

131.5 (38.5)

145.2 (42.5)

170.2 (49.9)

201.2 (59.0)

234.7 (68.8)

260.1 (76.2)

304.4 (89.2)


MBH (kW)

125.5 (36.8)

140.0 (41.0)

155.2 (45.5)

184.5 (54.1)

221.2 (64.8)

237.9 (69.7)

278.6 (81.6)

0.95

0.96

0.91

0.92

0.94

0.91

0.92

1

1

2

2

2

2

2

Sensible Heat Ratio (SHR) Number of Compressor(s)

Compressor


kW

11.1 11.1

12.7 12.7

14.7 14.7

17.1 17.1

20.3 20.3

21.8 21.8

26.1 26.1


kW

12.3 12.3

13.0 13.0

16.3 16.3

17.9 17.9

22.2 22.2

24.2 24.2

26.9 26.9


Inch Inch

7/8; 7/8; 5/8 5/8

7/8; 7/8; 5/8 5/8

7/8(2); 1/2(2)

7/8(2); 1/2(2)

7/8(2); 5/8(2)

7/8(2); 5/8(2)

7/8(2); 5/8(2)


Inch Inch

7/8; 7/8; 5/8 5/8

7/8; 7/8; 5/8 5/8

7/8(2); 1/2(2)

7/8(2); 1/2(2)

7/8(2); 1/2(2)

7/8(2); 5/8(2)

7/8(2); 5/8(2)

15/15

15/15

15/15 (Twin)

15/15 (Twin)

15/15 (Twin)

15/15 (Twin)

15/15 (Twin)

Fan Size


Air Volume

CFM (m3/h)

6,000 (10,194)

6,500 (11,043)

8,000 (13,592)

10,000 (16,989)

11,000 (18,688)

11,000 (18,688)

13,000 (22,086)


in H2O (Pa)

0.5 (125)

0.5 (125)

0.5 (125)

0.5 (125)

0.5 (125)

0.5 (125)

0.5 (125)

Motor (Standard Single Coil)

Hp (kW)

4.0 (3.0)

5.5 (4.0)

4.0 (3.0)

5.5 (4.0)

7.5 (5.5)

7.5 (5.5)

10.0 (7.5)

ft (m2)

2

12.2 (1.1)

12.2 (1.1)

23.9 (2.2)

23.9 (2.2)

23.9 (2.2)

23.9 (2.2)

23.9 (2.2)

FPM (m/s)

491 (2.5)

532 (2.7)

335 (1.7)

419 (2.1)

461 (2.3)

461 (2.3)

544 (2.8)

Inch Inch

7/8 7/8

7/8 7/8

7/8 7/8

7/8 7/8

7/8 7/8

7/8 7/8

7/8 7/8

Face Area Coil (DX)

Face Velocity Cond Conden ensa sate te Drai Drain n O.D O.D

Filters (ASHRAE 52.5 MERV 8) Reheat (Electric) N/A for DBRD/U Models Steam Humidifier (Optional)

20" x 20" x 2"

Qty

N/A

N/A

N/A

N/A

N/A

N/A

N/A

20" x 20" x 4"

Qty

4

4

6

6

6

6

6

20" x 25" x 4"

Qty

N/A

N/A

2

2

2

2

2


MBH (kW)

41.0 (12.0)

41.0 (12.0)

61.4 (18.0)

61.4 (18.0)

61.4 (18.0)

61.4 (18.0)

61.4 (18.0)

Capacity (max.)

lbs/hr (kg/hr)

17 (8.0)

17 (8.0)

33 (15.0)

33 (15.0)

33 (15.0)

33 (15.0)

33 (15.0)

kW

6.0 6.0

6.0 6.0

11.3 11.3

11.3 11.3

11.3 11.3

11.3 11.3

11.3 11.3

dBA

66

70

65

65

66

69

73



PHYSICAL DATA Height

H

mm (inch)

1944 (76.5)

1944 (76.5)

1944 (76.5)

1944 (76.5)

1944 (76.5)

1944 (76.5)

1944 (76.5)

Width

W

mm (inch)

1464 (57.6)

1464 (57.6)

2554 (100.6)

2554 (100.6)

2554 (100.6)

2554 (100.6)

2554 (100.6)

Depth

D

mm (inch)

874 (34.4)

874 (34.4)

874 (34.4)

874 (34.4)

874 (34.4)

874 (34.4)

874 (34.4)

DBAD/U

kg (lbs)

460 (1,012)

474 (1,043)

735 (1,617)

754 (1,659)

802 (1,764)

823 (1,811)

835 (1,837)

DBRD/U

kg (lbs)

482 (1,060)

496 (1,091)

776 (1,707)

795 (1,659)

843 (1,765)

864 (1,901)

876 (1,927)

Weight

Notes: 1.) Add 457mm (18inch) to height of unit for Discharge Plenum (optional) – Upflow Models only 2.) Add 32kg (71lbs)- Model 02 to 05; 51kg(112 lbs)-Model 07 to 13; 80kg(176 lbs)- Model 14 to 26 to weight of unit for Discharge Plenum (optional)- Upflow Model only

-5-

GENERAL INFORMATION Chilled Water System @ Water Supply/ Return 7°C/ 12°C (44.6°F/ 53.6°F) Model

Return Air 80F/67F/50% RH (27C/19C/50% RH)

95.8 (28.1)

147.2 (43.1)

186.5 (54.6)


MBH (kW)

34.9 (10.2)

44.2 (12.9)

59.3 (17.4)

71.1 (20.8)

109.3 (32.0)

138.6 (40.6)

0.76

0.71

0.73

0.74

0.74

0.74

14.3 (3.2) 10.4 (71.4) 43.0 (12.6)

18.7 (4.2) 3.7 (25.7) 57.5 (16.9)

22.0 (5.0) 4.9 (34.1) 67.9 (19.9)

33.8 (7.7) 5.0 (34.7) 103.8 (30.4)

41.9 (9.5) 18.3 (125.8) 132.3 (38.8)



MBH (kW)

10.5 (2.4) 4.2 (29.3) 31.8 (9.3)


MBH (kW)

29.9 (8.8)

37.1 (10.9)

50.5 (14.8)

61.0 (17.9)

93.2 (27.3)

118.6 (34.8)

GPM (m3/hr)

0.94

0.86

0.88

0.90

0.90

0.90

9.9 (2.2) 5.5 (38.0) 35.9 (10.5)

13.2 (3.0) 2.1 (14.3) 48.1 (14.1)

15.6 (3.5) 2.7 (18.8) 57.0 (16.7)

23.8 (5.4) 2.7 (18.8) 86.9 (25.5)

29.7 (6.7) 10.1 (69.6) 108.9 (31.9)

PSI (kPa)



MBH (kW)

7.3 (1.7) 2.3 (15.8) 26.8 (7.9)


MBH (kW)

26.4 (7.7)

32.5 (9.5)

44.4 (13.0)

53.8 (15.8)

82.0 (24.0)

107.8 (31.6)

GPM (m3/hr)

0.99

0.91

0.92

0.94

0.94

0.99

6.0 (1.4)

8.0 (1.8)

10.7 (2.4)

12.7 (2.9)

19.3 (4.4)

24.2 (5.5)

1.6 (11.1)

3.9 (26.6)

1.4 (9.9)

1.9 (13.2)

1.9 (13.2)

7.1 (49.0)

10/8

10/8

10/8

10/8

15/15

15/15

PSI (kPa)


Water Pressure Drop

GPM (m3/hr) PSI (kPa)

Fan Size Air Volume

CFM (m3/h)

1,500 (2,548)

1,500 (2,548)

2,000 (3,398)

2,500 (4,247)

4,000 (6,796)

5,000 (8,495)


in H2O (Pa)

0.3 (75)

0.3 (75)

0.3 (75)

0.3 (75)

0.5 (125)

0.5 (125)

Motor

hp (kW)

1.0 (0.75)

1.0 (0.75)

1.0 (0.75)

2.0 (1.5)

2.0 (1.5)

3.0 (2.2)

Face Area

ft2 (m2)

5.6 (0.5)

5.6 (0.5)

5.6 (0.5)

5.6 (0.5)

12.2 (1.1)

12.2 (1.1)

FPM (m/s)

270 (1.4)

270 (1.4)

360 (1.8)

450 (2.3)

327 (1.7)

409 (2.1)

inch

7/8

7/ 7/8

7/8

7/8

7/ 7/8

7/8

DN, mm

25

25

25

25

25

25

Kv, m³/h

10

10

10

10

10

10

Face Velocity Condensate Drain O.D

Filters (ASHRAE 52.5 MERV 8)

DBCD/U 09

81.4 (23.8)

Water Flow Rate

Chilled Water Control

DBCD/U 07

62.2 (18.2)

Water Pressure Drop

Coil (Chilled Water)

DBCD/U 05

45.7 (13.4)

Water Flow Rate


DBCD/U 04

MBH (kW)

Water Pressure Drop


DBCD/U 03


Water Flow Rate

Return Air 75F/62.5F/50% RH (24C/17C/50% RH)

DBCD/U 02

3-Way Modulating Valve, Size 20" x 20" x 2"

Qty

2

2

2

2

N/A

N/A

2 0" 0" x 20" x 4"

Qt y

N/ A

N /A /A

N /A /A

N/ A

4

4

20" 20" x 25" 25" x 4"

Qty Qty

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

MBH (kW)

20.5 (6.0)

20.5 (6.0)

20.5 (6.0)

20.5 (6.0)

41.0 (12.0)

41.0 (12.0)

lbs/hr (kg/hr)

17 (8.0)

17 (8.0)

17 (8.0)

17 (8.0)

17 (8.0)

17 (8.0)

kW

6.0 6.0

6.0 6.0

6.0 6.0

6.0 6.0

6.0 6.0

6.0 6.0

dBA

48

50

52

55

52

53

Reheat (Electric)


Steam Humidifier (Optional)

Capacity (max.) Powe Powerr Inpu Inputt (max (max.) .)


Physical Data Height

H

mm (inch)

1944 (76.5)

1944 (76.5)

1944 (76.5)

1944 (76.5)

1944 (76.5)

1944 (76.5)

Width

W

mm (inch)

749 (29.5)

749 (29.5)

749 (29.5)

749 (29.5)

1464 (57.6)

1464 (57.6)

Depth

D

mm (inch)

874 (34.4)

874 (34.4)

874 (34.4)

874 (34.4)

874 (34.4)

874 (34.4)

kg (lbs)

205 (451)

212 (466)

219 (482)

229 (504)

365 (803)

374 (823)

Weight

Note: 1.) Add 457mm (18 inch) to height of unit for Discharge Plenum (optional) – Upflow Models only 2.) Add 32kg (71lbs)- Model 02 to 05; 51kg(112 lbs)- Model 07 to 13; 80kg(176 lbs)- Model 14 to 26 to weight of unit for Discharge Plenum (optional)- Upflow Model only

-6-

GENERAL INFORMATION Chilled Water System @ Water Supply/ Return 7°C/ 12°C (44.6°F/ 53.6°F) Model Model



MBH (kW)

228.1 (66.8)

252.1 (73.9)

291.5 (85.4)

340.7 (99.8)

396.9 (116.3)

447.5 (131.1)

505.1 (148.0)


MBH (kW)

169.6 (49.7)

185.3 (54.3)

216.8 (63.5)

258.8 (75.8)

297.9 (87.3)

324.0 (94.9)

370.8 (108.6)

0.74

0.74

0.74

0.76

0.75

0.72

0.73

GPM (m3/hr)

52.3 (11.9)

57.8 (13.1)

66.8 (15.2)

78.1 (17.7)

91.0 (20.7)

102.6 (23.3)

115.8 (26.3)

Water Pressure Drop

PSI (kPa)

7.5 (51.7)

15.0 (103.4)

4.2 (28.7)

5.5 (37.7)

4.9 (34.1)

11.7 (81.0)

14.5 (99.8)


MBH (kW)

162.0 (47.5)

179.7 (52.7)

205.3 (60.2)

240.5 (70.5)

280.9 (82.3)

319.0 (93.5)

360.4 (105.6)


MBH (kW)

145.3 (42.6)

158.9 (46.6)

184.9 (54.2)

221.9 (65.0)

255.5 (74.9)

277.1 (81.2)

318.1 (93.2)

0.90

0.88

0.90

0.92

0.91

0.87

0.88

37.2 (8.4)

41.2 (9.4)

47.1 (10.7)

55.1 (12.5)

64.4 (14.6)

73.2 (16.6)

82.7 (18.8)

Sensible Heat Ratio (SHR) Water Flow Rate

Return Air 75F/62.5F/50% RH (24C/17C/50% RH)

Sensible Heat Ratio (SHR) Water Flow Rate


DBCD/U DBCD/U 11 DBCD/U DBCD/U 13 DBCD/U DBCD/U 14 DBCD/U DBCD/U 16 DBCD/U DBCD/U 19 DBCD/U DBCD/U 22 DBCD/U DBCD/U 26

GPM (m3/hr)

Water Pressure Drop

PSI (kPa)

4.1 (28.4)

8.4 (57.7)

2.3 (15.5)

3.0 (20.6)

2.7 (18.5)

6.5 (45.1)

8.1 (55.6)


MBH (kW)

136.1 (39.9)

151.1 (44.3)

172.2 (50.5)

202.5 (59.3)

236.4 (69.3)

267.6 (78.4)

303.1 (88.8)


MBH (kW)

128.4 (37.6)

140.2 (41.1)

163.4 (47.9)

196.3 (57.5)

225.8 (66.2)

243.6 (71.4)

280.0 (82.0)

0.94

0.93

0.95

0.97

0.96

0.91

0.92

30.3 (6.9)

33.6 (7.6)

38.3 (8.7)

45.1 (10.2)

52.6 (11.9)

59.5 (13.5)

67.4 (15.3)

2.9 (19.7)

5.9 (40.7)

1.6 (11.1)

2.1 (14.3)

1.9 (12.9)

4.6 (31.7)

5.7 (39.2)

15/15

15/15

15/15 (Twin)

15/15 (Twin)

15/15 (Twin)

15/15 (Twin)

15/15 (Twin)

CFM (m3/h)

6,000 (10,194)

6,500 (11,043)

8,000 (13,592)

10,000 (16,989)

11,000 (18,688)

11,000 (18,688)

13,000 (22,086)

in H2O (Pa)

0.5 (125)

0.5 (125)

0.5 (125)

0.5 (125)

0.5 (125)

0.5 (125)

0.5 (125)

Motor

Hp (kW)

4.0 (3.0)

5.5 (4.0)

4.0 (3.0)

5.5 (4.0)

7.5 (5.5)

7.5 (5.5)

10.0 (7.5)

Face Area

ft2 (m2)

12.2 (1.1)

12.2 (1.1)

23.9 (2.2)

23.9 (2.2)

23.9 (2.2)

23.9 (2.2)

23.9 (2.2)

FPM (m/s)

491 (2.5)

532 (2.7)

335 (1.7)

419 (2.1)

461 (2.3)

461 (2.3)

544 (2.8)

inch inch

7/8 7/8

7/8 7/8

7/8 7/8

7/8 7/8

7/8 7/8

7/8 7/8

7/8 7/8

DN, mm

40

40

40

40

40

50

50

Kv, m³/h

16

16

16

16

16

25

25

Sensible Heat Ratio (SHR) Water Flow Rate Water Pressure Drop

GPM (m3/hr) PSI (kPa)

Fan Size


Coil (Chilled Water)

Air Volume External Static Pressure (ESP)

Face Velocity Cond Conden ensa sate te Drai Drain n O.D O.D

Chilled Water Control Filters (ASHRAE 52.5 MERV 8)

3-Way Modulating Valve, Size 20" x 20" x 2"

Qty

N/A

N/A

N/A

N/A

N/A

N/A

N/A

20" x 20" x 4"

Qty

4

4

6

6

6

6

6

20" x 25" x 4"

Qty

N/A

N/A

2

2

2

2

2

Reheat (Electric)


MBH (kW)

41.0 (12.0)

41.0 (12.0)

61.4 (18.0)

61.4 (18.0)

61.4 (18.0)

61.4 (18.0)

61.4 (18.0)

Steam Humidifier (Optional)

Capacity (max.)

lbs/hr (kg/hr)

17 (8.0)

17 (8.0)

33 (15.0)

33 (15.0)

33 (15.0)

33 (15.0)

33 (15.0)

kW

6.0 6.0

6.0 6.0

11.3 11.3

11.3 11.3

11.3 11.3

11.3 11.3

11.3 11.3

dBA

57

58

52

58

59

60

64



Physical Data Height

H

mm (inch)

1944 (76.5)

1944 (76.5)

1944 (76.5)

1944 (76.5)

1944 (76.5)

1944 (76.5)

1944 (76.5)

Width

W

mm (inch)

1464 (57.6)

1464 (57.6)

2554 (100.6)

2554 (100.6)

2554 (100.6)

2554 (100.6)

2554 (100.6)

Depth

D

mm (inch)

874 (34.4)

874 (34.4)

874 (34.4)

874 (34.4)

874 (34.4)

874 (34.4)

874 (34.4)

kg (lbs)

398 (876)

410 (902)

602 (1,324)

615 (1,353)

665 (1,463)

678 (1,492)

688 (1,514)

Weight

Note: 1.) Add 457mm (18 inch) to height of unit for Discharge Plenum (optional) – Upflow Models only 2.) Add 32kg (71lbs)- Model 02 to 05; 51kg(112 lbs)- Model 07 to 13; 80kg(176 lbs)- Model 14 to 26 to weight of unit for Discharge Plenum (optional)- Upflow Model only

-7-

GENERAL INFORMATION DUAL COILS OPTION Air Cooled DX & Chilled Water Systems This system is a combination of the both Direct Expansion (DX) and Chilled Water (CW) system with 2 cooling coil. Cooling capacity and other parameters for DX and CW System are as per stated on respective tables; except for the following. Model

DBDD/U 02

DBDD/U 03

DBDD/U 04

DBDD/U 05

DBDD/U 07

DBDD/U 09

Fan Motor (Indoor)

hp (kW)

1.0 (0.75)

1.0 (0.75)

1.5 (1.1)

2.0 (1.5)

2.0 (1.5)

4.0 (3.0)


dBA

56

56

57

57

62

63

Weight

kg (lbs)

270 (594)

284 (625)

292 (642)

304 (669)

467 (1,027)

497 (1,093)

Model

DBDD/U 11

DBDD/U 13

DBDD/U 14

DBDD/U 16

DBDD/U 19

DBDD/U 22

Fan Motor (Indoor)

hp (kW)

5.5 (4.0)

5.5 (4.0)

4.0 (3.0)

7.5 (5.5)

7.5 (5.5)

10.0 (7.5)


dBA

66

70

65

65

66

69

Weight

kg (lbs)

523 (1,151)

537 (1,181)

823 (1,811)

842 (1,852)

909 (2,000)

941 (2,070)

DBDD/U 26

N/A

Notes: 1.) Add 457mm (18inch) to height of unit for Discharge Plenum (optional) – Upflow Models only 2.) Add 32kg (71 lbs)- Model 02 to 05; 51kg(112 lbs)-Model 07 to 13; 80kg(176 lbs)- Model 14 to 22 to weight of unit for Discharge Plenum (optional)- Upflow Model only

CONDENSER SELECTION Selections are to be based on standard airflow rate and return air temperature of 24°C / 17°C (75°F / 62.5°F) or lesser at sea level. DX-System

DBAD/U 02

DBAD/U 03

DBAD/U 04

DBAD/U 05

DBAD/U 07

DBAD/U 09

Dual Coils System

DBDD/U 02

DBDD/U 03

DBDD/U 04

DBDD/U 05

DBDD/U 07

DBDD/U 09

DX-System with Hot Gas Reheat

DBRD/U 02

DBRD/U 03

DBRD/U 04

DBRD/U 05

DBRD/U 07

DBRD/U 09

Total Heat Rejection (Nominal)

MBH (kW)

46 (14)

51 (15)

60 (18)

73 (21)

101 (30)

151 (44)

35°C (95°F) Ambient

-

DBRC04

DBRC04

DBRC04

DBRC06

DBRC08

DBRC10

37.8°C (100°F) Ambient

-

DBRC04

DBRC04

DBRC06

DBRC06

DBRC08

DBRC13


-

DBRC04

DBRC06

DBRC06

DBRC08

DBRC11

DBRC17


See Note 1

DBRC06

DBRC06

DBRC08

DBRC11

DBRC17

DBRC20


See Note 1

DBRC08

DBRC11

DBRC17

DBRC17

DBRC26

DBRC34


See Note 2

DBRC11

DBRC11

DBRC17

DBRC20

DBRC26

DBRC34


See Note 3

DBRC13

DBRC13

DBRC20

DBRC26

DBRC30

DBRC40

DX-System

DBAD/U 11

DBAD/U 13

DBAD/U 14

DBAD/U 16

DBAD/U 19

DBAD/U 22

DBAD/U 26

Dual Coils System

DBDD/U 11

DBDD/U 13

DBDD/U 14

DBDD/U 16

DBDD/U 19

DBDD/U 22

N/A

DX-System with Hot Gas Reheat

DBRD/U 11

DBRD/U 13

DBRD/U 14

DBRD/U 16

DBRD/U 19

DBRD/U 22

DBRD/U 26

Total Heat Rejection (Nominal)

MBH (kW)

171 (50)

193 (57)

220 (64)

262 (77)

293 (86)

332 (97)

388 (114)


-

DBRC13

DBRC17

DBRC17

DBRC20

DBRC20

DBRC26

DBRC30


-

DBRC17

DBRC17

DBRC20

DBRC26

DBRC26

DBRC30

DBRC30


-

DBRC20

DBRC26

DBRC26

DBRC26

DBRC34

DBRC34

DBRC34


See Note 1

DBRC26

DBRC30

DBRC34

DBRC40

DBRC44

DBRC44

DBRC44


See Note 1

DBRC40

DBRC44

DBRC44

DBRC30 x 2

DBRC30 x 2

DBRC40 x 2

DBRC40 x 2


See Note 2

DBRC40

DBRC44

DBRC44

DBRC30 x 2

DBRC34 x 2

DBRC40 x 2

DBRC44 x 2


See Note 3

DBRC44

DBRC44

DBRC26 x 2

DBRC30 x 2

DBRC34 x 2

DBRC44 x 2

DBRC44 x 2

Model

Model

Notes: 1.) Multiply Total Compressor Power Input by 1.05 2.) Multiply Cooling Capacity by 0.9. Multiply Total Compressor Power Input by 1.1 3.) Multiply Cooling Capacity by 0.9. Multiply Total Compressor Power Input by 1.2

-8-

GENERAL INFORMATION ELECTRICAL DATA Air Cooled DX & Chilled Water Systems 1.) STANDARD - COOLING & ELECTRIC HEATERS o

o

o

o

o

o

At 35 C (95 F) ambient; Return Air at 24 C/17 C/50 %RH (75 F/62.5 F/50 %RH) Model

DBAD/U 02

Power Supply

RLA

380V/ 3Ph/ 50Hz 400V/ 3Ph/ 50Hz 415V/ 3Ph/ 50Hz

DBAD/U 03

MCA

MFS

15.6

18

16.0

18

16.4

19

460V/ 3Ph/ 60Hz

DBAD/U 04

RLA

MCA

MFS

20

15.7

18

20

16.2

18

20

16.6

19

N/A

MCA

MFS

20

17.6

20

20

18.0

20

20

18.4 15.3

N/A

Model

DBAD/U 11

Powe r Supply

DBAD/U 05

RLA

DBAD/U 13

DBAD/U 07

RLA

MCA

MFS

25

20.1

22

25

20.5

23

21

25

21.0

17

20

18.0

DBAD/U 14

MCA

MFS

32

32.7

37

50

32

33.6

38

50

23

32

34.5

39

50

40.3

45

63

20

25

28.5

32

40

35.7

40

50

DBAD/U 16

RL A MC A

MFS

39.1

44

60

39.7

44

63

DBAD/U 22

MFS

RLA

DBAD/U 26

RL A MCA

MFS

R LA LA

M CA CA

MFS

43.5

49

63

51.6

58

75

58.0

64

75

65.7

71

100

72.1

78

100

77.5

83

100

93.4

100

125

400V/ 3Ph/ 50Hz

44.2

50

63

53.0

60

75

59.1

65

75

66.9

73

100

72.9

79

100

78.5

85

100

96.0

103

125

415V/ 3Ph/ 50Hz

45.3

51

63

55.6

63

80

60.6

67

75

68.7

75

100

73.8

80

100

80.6 80.6

87

100

101.0

109

125 125

460V/ 3Ph/ 60Hz

38.3

43

60

41.4

46

63

53.2

59

63

56.5

62

75

64.5

70

100

67.3

73

100

75.8

81

100

o

MFS

MCA

RL A MC A MFS

o

RL A MC A

DBAD/U 19

RLA

380V/ 3Ph/ 50Hz

o

MC A MFS

DBAD/U 09

RLA

RL A MC A MFS

o

Return Air at 24 C/17 C/50 %RH (75 F/62.5 F/50 %RH) Model

DBCD/U 02

DBCD/U 03

DBCD/U 04

DBCD/U 05

DBCD/U 07

DBCD/U 09

Power Supply

RLA

MCA

MFS

RLA

MCA

MFS

RLA

MCA

MFS

RLA

MCA

MFS

RLA

MCA

MFS

MCA

MFS

380V/ 3Ph/ 50Hz

9.7

12

16

9.7

12

16

9.7

12

16

11.3

13

16

18.9

23

25

20.3

24

30

400V/ 3Ph/ 50Hz

10.0

12

16

10.0

12

16

10.0

12

16

11.5

14

16

19.6

24

25

20.8

25

30

415V/ 3Ph/ 50Hz

10.2

12

16

10.2

12

16

10.2

12

16

11.7

14

16

20.0

24

25

21.2

25

30

460V/ 3Ph/ 60Hz

6.6

8

10

7.9

9

16

9.1

11

16

10.5

12

16

18.1

22

25

19.2

23

25

Model

DBCD/U 11

Pow e err Su pp pp ly ly

R LA LA

DBCD/U 13

M CA CA

MF S

R LA LA

DBCD/U 14

M CA CA

M FS FS

RL RL A

DBCD/U 16

M CA CA

M FS FS

R LA LA

M CA CA

DBCD/U 19

MF S

R LA LA

M CA CA

RLA

DBCD/U 22

M FS FS

RL A

DBCD/U 26

M CA CA

M FS FS

RL RL A

M CA CA

MF S 50

380V/ 3Ph/ 50Hz

22.0

26

30

23.9

28

32

29.6

35

40

31.5

37

40

34.5

40

50

34.5

40

50

38.0

44

400V/ 3Ph/ 50Hz

22.5

26

30

24.2

28

32

30.5

37

40

32.3

38

40

35.1

41

50

35.1

41

50

38.4

44

50

415V/ 3Ph/ 50Hz

22.8

27

30

24.5

29

32

31.2

37

40

32.9

39

40

35.6

42

50

35.6

42

50

38.8

45

50

460V/ 3Ph/ 60Hz

20.5

24

30

22.0

26

30

28.0

34

40

29.5

35

40

31.9

38

50

31.9

38

50

35.8

41

50

2.) STANDARD WITH OPTIONAL HUMIDIFIER o

o

o

o

o

o

At 35 C (95 F) ambient; Return Air at 24 C/ 17 C/50 %RH (75 F/62.5 F/50 %RH) Model

DBAD/U 02

DBAD/U 03

DBAD/U 04

DBAD/U 05

DBAD/U 07

DBAD/U 09

Power Supply

RLA

MCA

MFS

RLA

MCA

MFS

RLA

MCA

MFS

RLA

MCA

MFS

RLA

MCA

MFS

RLA

MCA

MFS

380V/ 3Ph/ 50Hz

24.7

27

32

24.8

27

32

26.7

29

32

29.2

31

40

41.8

46

60

48.2

53

63

400V/ 3Ph/ 50Hz

24.7

27

32

24.9

27

32

26.7

29

32

29.2

31

40

42.2

46

50

48.4

53

63

415V/ 3Ph/ 50Hz

24.8

27

32

25.0

27

32

26.8

29

32

29.3

31

40

42.9

47

50

48.7

53

63

22.9

25

30

25.5

27

30

36.0

40

50

43.2

47

63

460V/ 3Ph/ 60Hz

N/A

N/A

Model

DBAD/U 11

Powe r Supply

RL A MC A MFS

RL A

M CA CA

380V/ 380V/ 3Ph/ 3Ph/ 50Hz 50Hz 400V/ 400V/ 3Ph/ 3Ph/ 50Hz 50Hz

52.6 52.8

58 58

60.7 60.7 61.7 61.7

68 69

80 80

415V/ 415V/ 3Ph/ 3Ph/ 50Hz 50Hz

53.7

59

80

64.0 64.0

72

100

76.2 76.2

82

100 100

84.3 84.3

91

100 100

89.5 89.5

96

460V/ 3Ph/ 60Hz

45.8 45.8

50

63

48.9 48.9

54

63

67.3 67.3

73

100

70.6 70.6

76

100 100

78.6 78.6

84

o

DBAD/U 13

75 75

o

DBAD/U 14

MFS RLA MCA 75.1 75.1 75.3 75.3

o

DBAD/U 16

MFS

81 81

100 100

DBAD/U 19

RL RL A MC A MFS RL A MC A 82.8 82.8 83.1 83.1

89 89

100 100

89.2 89.2 89.2 89.2

DBAD/U 22

MFS

95 95

100 100

DBAD/U 26

RL RLA MCA MFS 94.6 94.6 94.8 94.8

100 101 101

100

96.3 96.3

100

81.4 81.4

RL RL A

MCA

MFS

125 125

110.5 110.5 112.3 112.3

117 119

150 150 150

103

125

116.7 116.7

124

150

87

100 100

89.9 89.9

96 96

100 100

o

Return Air at 24 C/17 C/50 %RH (75 F/62.5 F/50 %RH) Model

DBCD/U 02

DBCD/U 03

DBCD/U 04

DBCD/U 05

DBCD/U 09

Power Supply

RLA

MCA

MFS

RLA

MCA

MFS

RLA

MCA

MFS

RLA

MFS

RLA

MCA

MFS

MCA

MFS

380V/ 3Ph/ 50Hz

18.8

21

25

18.8

21

25

18.8

21

25

20.4

22

25

28.0

32

40

29.4

33

40

400V/ 3Ph/ 50Hz

18.7

21

25

18.7

21

25

18.7

21

25

20.2

22

25

28.2

32

40

29 .5

33

40

415V/ 3Ph/ 50Hz

18.6

21

25

18.6

21

25

18.6

21

25

20.0

22

25

28.4

33

40

29 .6

34

40

460V/ 3Ph/ 60Hz

14.2

15

20

15.4

17

20

16.7

19

20

18.1

20

25

25.6

29

40

26.7

30

40

Model

DBCD/U 11

DBCD/U 13

DBCD/U 14

DBCD/U 16

DBCD/U 19 MF S

R LA LA

M FS FS

R LA LA

380V/ 380V/ 3Ph/ 3Ph/ 50Hz 50Hz

31.1 31.1

35 35

40

33.0

37

40

46.7 46.7

52

60

48.6 48.6

54

60

51.6 51.6

57

63

51.6 51.6

57

63

400V/ 400V/ 3Ph/ 3Ph/ 50Hz 50Hz

31.1 31.1

35 35

40

32.9

37

40

46.7 46.7

53

60

48.5 48.5

55

60

51.4 51.4

57

63

51.4 51.4

57

63

415V/ 415V/ 3Ph/ 3Ph/ 50Hz 50Hz

31.2 31.2

35 35

40

32.9

37

40

46.8 46.8

53

60

48.5 48.5

55

60

51.3 51.3

58

63

51.3 51.3

58

460V/ 460V/ 3Ph/ 3Ph/ 60Hz 60Hz

28.0 28.0

32 32

40

29.5

33

40

42.1 42.1

48

50

43.6 43.6

49

60

46.0 46.0

52

60

46.0 46.0

52

MFS - Maximum Fuse Size

M CA CA

DBCD/U 26

M CA CA

-9-

R LA LA M CA CA

DBCD/U 22

R LA LA

MCA - Minimum Circuit Amps

M FS FS

RLA


Note : RLA - Rated Load Amps

M C A M FS FS R LA LA M CA CA M FS FS R LA LA M CA CA

MCA

DBCD/U 07

MF MF S R LA LA

MC MC A

MF S

55.1 55.1

61

70

54.7 54.7

61

70

63

54.5 54.5

61

70

60

49.9 49.9

56

70

GENERAL INFORMATION ELECTRICAL DATA Air Cooled Dual Coils (DX + CW) & DX With Hot Gas Reheat Systems 1.) STANDARD - COOLING & ELECTRIC HEATERS o o o o o o At 35 C (95 F) ambient; Return Air at 24 C/17 C/50 %RH (75 F/62.5 F/ 50 %RH) Model Power Supply

DBDD/U 02 RLA RLA

DBDD/U 03 RLA RLA

MCA MFS

(DX) (CHW)

9.7 9.7

(DX)

(CHW)

9.7 9.7

DBDD/U 04

MCA MFS

RLA RLA

DBDD/U 05

MC A MFS

(DX) (CHW)

RLA RLA (DX)

DBDD/U 07

MCA MFS

(CHW)

RLA RLA (DX)

DBDD/U 09 RLA RLA

MCA MFS

(CHW)

(DX) (CHW)

MCA MFS

380V 380V// 3Ph/ 3Ph/ 50Hz 50Hz

15.6 15.6

18

20

15.7 15.7

18

20

18.3 18.3 10.4 10.4

20

25

20.1 20.1 11.3 11.3

22

30

32.7 32.7 18.9 18.9

37

40

40.8 40.8 22.0 22.0

45

60

400V 400V// 3Ph/ 3Ph/ 50Hz 50Hz

16.0 16.0 10.0 10.0

18 18

20

16. 16.2 2 10.0 10.0

18 18

20

18. 18.6 6 10.6 10.6

21

25

20. 20.5 5 11.5 11.5

23

30

33. 33.6 6 19.6 19.6

38 38

40

41. 41.4 4 22.5 22.5

46

60

415V 415V// 3Ph/ 3Ph/ 50Hz 50Hz

16.4 16.4 10.2 10.2

19 19

20

16. 16.6 6 10.2 10.2

19 19

20

19. 19.0 0 10.8 10.8

21

25

21. 21.0 0 11.7 11.7

23

30

34. 34.5 5 20.0 20.0

39 39

40

41. 41.9 9 22.8 22.8

47

60

16.0 16.0

18

20

18.0 18.0 10.5 10.5

20

25

28.5 28.5 18.1 18.1

32

40

37.0 37.0 20.5 20.5

41

50

460V 460V// 3Ph/ 3Ph/ 60Hz 60Hz Model Power Supply

N/A N/A

N/A N/A

DBDD/U 11

DBDD/U 13

9.8 9.8

DBDD/U 14

DBDD/U 16

DBDD/U 19

DBDD/U 22

RLA RLA MCA MFS RLA RLA MCA MFS RLA RLA MC A MFS RLA RLA MC A MFS RLA RLA MCA MFS RLA RLA MCA MFS (DX) (CHW)

(DX) (CHW)

(DX) (CHW)

(DX)

(CHW)

(DX)

(CHW)

(DX) (CHW)

380V 380V// 3Ph/ 3Ph/ 50Hz 50Hz

45.4 45.4 23.9 23.9

51

63

51.6 51.6 23.9 23.9

58

75

58.0 58.0 29.6 29.6

64

75

68.7 68.7 34.5 34.5

74

100 100

72.1 72.1 34.5 34.5

78

100

81.0 81.0 38.0 38.0

87

100 100

400V 400V// 3Ph/ 3Ph/ 50Hz 50Hz

45.9 45.9 24.2 24.2

51

63

53.0 53.0 24.2 24.2

60

75

59.1 59.1 30.5 30.5

65

75

69.7 69.7 35.1 35.1

76

100 100

72.9 72.9 35.1 35.1

79

100

81.8 81.8 38.4 38.4

88

100 100

415V 415V// 3Ph/ 3Ph/ 50Hz 50Hz

47.0 47.0 24.5 24.5

53

63

55.6 55.6 24.5 24.5

63

75

60.6 60.6 31.2 31.2

67

75

71.4 71.4 35.6 35.6

78

100 100

73.8 73.8 35.6 35.6

80

100

83.8 83.8 38.8 38.8

90

100 100

460V 460V// 3Ph/ 3Ph/ 60Hz 60Hz

39.8 39.8 22.0 22.0

44 44

60

41.4 41.4 22.0 22.0

46 46

63

53.2 53.2 28.0 28.0

59

63

58.9 58.9 31.9 31.9

65

75

64.5 64.5 31.9 31.9

70

100

71.2 71.2 35.8 35.8

77

100

2.) STANDARD WITH OPTIONAL HUMIDIFIER o o o o o o At 35 C (95 F) ambient; Return Air at 24 C/17 C/50 %RH (75 F/62.5 F/ 50 %RH) Model Power Supply

DBDD/U 02 RLA RLA

DBDD/U 03 RLA RLA

MCA MFS

(DX) (CHW)

(DX)

(CHW)

DBDD/U 04

MCA MFS

RLA RLA

DBDD/U 05

MC A MFS

(DX) (CHW)

RLA RLA (DX)

DBDD/U 07

MCA MFS

(CHW)

RLA RLA (DX)

DBDD/U 09 RLA RLA

MCA MFS

(CHW)

(DX) (CHW)

MCA MFS

380V/ 3Ph/ 50Hz

24.7 24.7 18.8 18.8

27

32

24.8 24.8 18.8 18.8

27

32

27.4 27.4 19.5 19.5

29

32

29.2 29.2 20.4 20.4

31

40

41.8 41.8 28.0 28.0

46

50

49.9 49.9 31.1 31.1

55

63

400V 400V// 3Ph/ 3Ph/ 50Hz 50Hz

24.7 24.7 18.7 18.7

27 27

32

24. 24.9 9 18.7 18.7

27 27

32

27. 27.3 3 19.3 19.3

29

32

29. 29.2 2 20.2 20.2

31

40

42. 42.2 2 28.2 28.2

46 46

50

50. 50.0 0 31.1 31.1

55

63

415V 415V// 3Ph/ 3Ph/ 50Hz 50Hz

24.8 24.8 18.6 18.6

27 27

32

25. 25.0 0 18.6 18.6

27 27

32

27. 27.4 4 19.2 19.2

29

32

29. 29.3 3 20.0 20.0

31

40

42. 42.9 9 28.4 28.4

47 47

50

50. 50.3 3 31.2 31.2

55

63

2 3. 3. 6 1 7. 7. 4

25

30

2 5. 5.5 1 8. 8. 1

27

30

3 6. 6. 0 2 5. 5. 6

40

50

4 4. 4. 5 2 8. 8. 0

49

63

4 60 60 V/ V/ 3 Ph Ph / 6 0H 0H z Model Power Supply

N /A /A

N /A /A

DBDD/U 11 RLA RLA

DBDD/U 13 RLA RLA

MCA MFS

(DX) (CHW)

(DX) (CHW)

DBDD/U 14

MCA MFS

RLA RLA

DBDD/U 16

MC A MFS

(DX) (CHW)

RLA RLA (DX)

(CHW)

DBDD/U 19

MC A MFS

RLA RLA (DX)

DBDD/U 22 RLA RLA

MCA MFS

(CHW)

(DX) (CHW)

MCA MFS

380V/ 380V/ 3Ph/ 3Ph/ 50Hz 50Hz

54. 54.5 5 33.0 33.0

60

75

60.7 60.7 33.0 33.0

68

80

75.1 75.1 46.7 46.7

81

100

85.8 85.8 51.6 51.6

92

100

89.2 89.2 51.6 51.6

95

100 98.1 98.1 55.1 55.1

104

400V/ 400V/ 3Ph/ 3Ph/ 50Hz 50Hz

54. 54.6 6 32.9 32.9

60

75

61.7 61.7 32.9 32.9

69

80

75.3 75.3 46.7 46.7

81

100

86.0 86.0 51.4 51.4

92

100

89.2 89.2 51.4 51.4

95

100 98.1 98.1 54.7 54.7

104

125 125 125 125

415V/ 3Ph/ 50Hz

55.4 55.4 32.9 32.9

61 61

75

64. 64.0 0 32.9 32.9

72 72

80

76. 76.2 2 46.8 46.8

82

100 100

87.1 87.1 51.3 51.3

93

100

89.5 89.5 51.3 51.3

96 96

100

99.5 99.5 54.5 54.5

106 106

125 125

460V 460V// 3Ph/ 3Ph/ 60Hz 60Hz

47.3 47.3 29.5 29.5

52

63

48.9 48.9 29.5 29.5

54

63

67.3 67.3 42.1 42.1

73

100 100

73.0 73.0 46.0 46.0

79

100 100

78.6 78.6 46.0 46.0

84

100 100

85.3 85.3 49.9 49.9

91

100 100

3.) COOLING & HOT GAS REHEAT o o o o o o At 35 C (95 F) ambient; Return Air at 24 C/17 C/50 %RH (75 F/62.5 F/ 50 %RH) Model Power Supply

DBRD/U 02

DBRD/U 03

DBRD/U 04

RLA

MCA

MFS

RLA

MCA

MFS

RLA

380V/ 3Ph/ 50Hz

8.0

9

16

8.1

10

16

400V/ 3Ph/ 50Hz

8.0

9

16

8.2

10

16

415V/ 3Ph/ 50Hz

8.1

10

16

8.3

10

16

460V/ 3Ph/ 60Hz Model

N/A

N/A

DBRD/U 11

DBRD/U 13

DBRD/U 05

MCA

MFS

RLA

10.0

12

20

12.4

10.0

12

20

12.5

10.1

12

20

12.6

7.8

9

16

10.5

DBRD/U 14

MCA

DBRD/U 07

MFS

RLA

15

20

15

20

15 12

DBRD/U 16

DBRD/U 09

MCA

MFS

RLA

17.4

21

32

17.5

21

32

20

17.8

21

20

13.4

16

DBRD/U 19


R LA LA

M CA CA

MF S

R LA LA

M CA CA

M FS FS

RL RL A

M CA CA

M FS FS

R LA LA

M CA CA

MF S

R LA LA

M CA CA

380V/ 3Ph/ 50Hz

28.2

34

50

36.3

43

63

35.1

39

50

42.8

47

63

49.2

400V/ 3Ph/ 50Hz

28.1

33

50

37.0

44

63

35.0

39

50

42.8

47

63

415V/ 3Ph/ 50Hz

28.6

34

50

39.0

47

75

35.5

39

50

43.7

48

460V/ 3Ph/ 60Hz

23.2

28

40

26.3

31

50

30.6

34

40

33.9

37

MCA

MFS

23.8

28

40

23.6

28

40

32

23.7

28

40

25

20.6

25

40

DBRD/U 22

M FS FS

RL A

54

75

54.6

48.8

54

63

63

48.8

54

50

41.9

46

M CA CA

DBRD/U 26

M FS FS

RL RL A

M CA CA

60

75

70.5

77

MF S 100

54.4

60

75

71.9

79

100

63

55.6

61

75

76.0

84

100

60

44.7

49

63

53.2

58

75

4.) COOLING & HOT GAS REHEAT WITH OPTIONAL HUMIDIFIER o o o o o o At 35 C (95 F) ambient; Return Air at 24 C/17 C/50 %RH (75 F/62.5 F/ 50 %RH) Model

DBRD/U 02

DBRD/U 03

DBRD/U 04

DBRD/U 05

Power Supply

RLA

MCA

MFS

RLA

MCA

MFS

RLA

MCA

MFS

RLA

380V/ 3Ph/ 50Hz

17.1

19

25

17.2

19

25

19.1

21

25

21.6

400V/ 3Ph/ 50Hz

16.6

19

25

16.8

19

25

18.6

21

25

21.1

415V/ 3Ph/ 50Hz

16.4

19

25

16.6

19

25

18.4

21

25

15.3

17

20

460V/ 3Ph/ 60Hz Model

N/A

N/A

DBRD/U 11

DBRD/U 13

DBRD/U 14

DBRD/U 07

DBRD/U 09

MFS

RLA

MCA

MFS

24

32

26.6

30

40

23

32

26.1

30

40

21.0

23

32

26.2

30

18.0

20

25

20.9

24

DBRD/U 16

DBRD/U 19

MFS

32 .9

38

50

32 .3

37

50

40

32 .0

37

50

32

28.1

32

40

DBRD/U 22

MF S

R LA LA

M FS FS

R LA LA

380V/ 380V/ 3Ph/ 3Ph/ 50Hz 50Hz

37. 37.3 3

43 43

63

45.4 45.4

52

80

52.2 52.2

56

75

59.9 59.9

64

80

66.3 66.3

71

80

71.7 71.7

77

100

400V/ 400V/ 3Ph/ 3Ph/ 50Hz 50Hz

36. 36.7 7

42 42

63

45.6 45.6

53

80

51.2 51.2

55

63

59.0 59.0

63

80

65.0 65.0

70

80

70.6 70.6

76

100

415V/ 415V/ 3Ph/ 3Ph/ 50Hz 50Hz

37. 37.0 0

43 43

63

47.3 47.3

55

80

51.2 51.2

55

63

59.3 59.3

64

80

64.5 64.5

69

80

71.3 71.3

77

460V/ 460V/ 3Ph/ 3Ph/ 60Hz 60Hz

30.7 30.7

35 35

50

33.8

39

50

44.7 44.7

48

60

48.0 48.0

51

63

56.0 56.0

60

75

58.8 58.8

63

MFS - Maximum Fuse Size

M CA CA

DBRD/U 26

M CA CA

- 10 -

R LA LA M CA CA

MCA

R LA LA

MCA - Minimum Circuit Amps

M FS FS

RLA


Note : RLA - Rated Load Amps

M C A M FS FS R LA LA M CA CA M FS FS R LA LA M CA CA

MCA

MF MF S R LA LA

MC MC A

MF S

87.6 87.6

95

125

88.1 88.1

95

125

100

91.7 91.7

99

125

80

67.3 67.3

72

100 100

GENERAL INFORMATION DIMENSIONAL DATA Down Flow - Air Cooled System (With or Without Hot Gas Reheat) DBAD/ DBRD 02, 03, 04, 05

DBAD/ DBRD 07, 09, 11, 13

DBAD/ DBRD 14, 16, 19, 22, 26

- 11 -

GENERAL INFORMATION Down Flow - Chilled Water System DBCD 02, 03, 04, 05

DBCD 07, 09, 11, 13

DBCD 14, 16, 19, 22, 26

- 12 -

GENERAL INFORMATION Down Flow - Dual Coils System DBDD 02, 03, 04, 05

DBDD 07, 09, 11, 13

DBDD 14, 16, 19, 22

- 13 -

GENERAL INFORMATION Up Flow - Air Cooled System (With or Without Hot Gas Reheat) DBAU/ DBRU 02, 03, 04, 05

DBAU/ DBRU 07, 09, 11, 13

DBAU/ DBRU 14, 16, 19, 22, 26

- 14 -

GENERAL INFORMATION Up Flow - Chilled Water System DBCU 02, 03, 04, 05

DBCU 07, 09, 11, 13

DBCU 14, 16, 19, 22, 26

- 15 -

GENERAL INFORMATION Up Flow - Dual Coils System DBDU 02, 03, 04, 05

DBDU 07, 09, 11, 13

DBDU 14, 16, 19, 22

- 16 -

GENERAL INFORMATION Up Flow With Plenum - Air Cooled System (With or Without Hot Gas Reheat) DBAU/ DBRU 02, 03, 04, 05

DBAU/ DBRU 07, 09, 11, 13

DBAU/ DBRU 14, 16, 19, 22, 26

- 17 -

GENERAL INFORMATION Up Flow With Plenum - Chilled Water System DBCU 02, 03, 04, 05

DBCU 07, 09, 11, 13

DBCU 14, 16, 19, 22, 26

- 18 -

GENERAL INFORMATION Up Flow With Plenum - Dual Coils System DBDU 02, 03, 04, 05

DBDU 07, 09, 11, 13

DBDU 14, 16, 19, 22

- 19 -

GENERAL INFORMATION REMOTE AIR-COOLED CONDENSERS Technical Data

Physical Data

Model

Length 'L'

Fans Qty

Electrical Data Approx. Weight

RPM

Motor FLA (3-Phase)

Qty

Total L/S

mm (ins)

Motor

380V

400V

415V

460V

(50Hz)

(50Hz)

(50Hz)

(60Hz)

kg(lbs) (CFM)

50Hz

60Hz

220~240Vac, 1Ph, 50/60Hz. FLA @ 240V/50Hz = 1.4A; FLA @ 240V/60Hz = 1.5A

DBRC 04

870 (34¼)

1

2030 (4300)

100 (220)

1

900

1075

DBRC 06

870 (34¼)

1

3210 (6800)

111 (244)

1

925

1110

2.0

1.9

1.8

1.7

DBRC 08

870 (34¼)

1

3210 (6800)

122 (268)

1

925

1110

2.0

1.9

1.8

1.7

DBRC 10

870 (34¼)

1

3210 (6800)

134 (295)

1

925

1110

2.0

1.9

1.8

1.7

DBRC 11

870 (34¼)

1

3210 (6800)

180 (400)

1

925

1110

2.0

1.9

1.8

1.7

DBRC 13

1683 (66¼)

2

6420 (13600)

190 (420)

2

925

1110

4.0

3.8

3.6

3.4

DBRC 17

1683 (66¼)

2

6420 (13600)

204 (450)

2

925

1110

4.0

3.8

3.6

3.4

DBRC 20

1683 (66¼)

2

6420 (13600)

265 (583)

2

925

1110

4.0

3.8

3.6

3.4

DBRC 26

2500 (98¼)

3

9630 (20400)

288 (634)

3

925

1110

6.0

5.7

5.4

5.1

DBRC 30

2500 (98¼)

3

9630 (20400)

320 (700)

3

925

1110

6.0

5.7

5.4

5.1

DBRC 34

2500 (98¼)

3

9630 (20400)

355 (780)

3

925

1110

6.0

5.7

5.4

5.1

DBRC 40

3308 (130¼)

4

12838 (27200)

380 (835)

4

925

1110

8.0

7.6

7.2

6.8

DBRC 44

3308 (130¼)

4

12838 (27200)

410 (900)

4

925

1110

8.0

7.6

7.2

6.8

Notes:

1.) All dimensions are in mm (inches). 2.) * = 889(35”), 889(35”), ** = 972(38.25”) 972(38.25”) for DBRC-04

- 20 -

INSTALLATION INSPECTION The DB-Aire II unit has been tested and inspected prior to shipment. To ensure that the unit has been received in excellent condition, perform a visual inspection of the outer crating immediately upon delivery, and note any external damage on the freight carrier’s delivery forms. As soon as possible, inspect the unit itself for possible internal damage. File a claim with the shipping company if the shipment is damaged or incomplete. Freight damage claims are the responsibility of the purchaser .

TRANSPORT The unit is mounted on skid pallet, packed several times in plastic film and crated. It must always be transported vertically upright on the pallet with a fork lift. The unit can be moved by lifting devices with ropes. For this the ropes have to be fixed at the pallet, and the upper unit edges have to be protected by wooden laths or spreader bars to prevent damage to the unit. To avoid any damage to the unit during transportation, it is recommended that the unit should only be removed from its packaging when the unit has reached its final destination. It is also essential to make sure that the floor on which the unit is to be installed is capable of supporting its weight. The weight of the unit can be found on the Performance and Technical Data on this manual.

OPERATING LIMITS Units are designed to operate within working ranges (See Performance and Technical Data). The limits are referred to new machines which have been correctly installed and serviced. The warranty clauses are no longer valid for any possible damage or malfunction that may occur during or due to operation outside the application values. Direct Expansion (DX) System o

Room Condition Ambient Condition Water Pressure

Chilled Water (CW) System o

68°F(20°C) to 80 F(27 C), 45 to 55% RH Min. 66oF(19oC), for DBRC Outdoor Units

-

-

Max 232PSI (16bar)

LOCATING THE UNIT AND INSTALLATION CLEARANCE Consult local building codes and the national electrical code for special installation requirements. During installation, respect the clearance required for air-flow, wiring, routine and major servicing and maintenance work. The unit may be set directly on top of a raised floor if the raised floor has sufficient load capacity. The unit should not be placed near any corner of the room or at the end of a long, narrow room. For best air distribution, the unit should be centered against the longest wall and as close to the load as possible. The unit is designed for full front access with hinged and lock type full height doors. Therefore it allows flexible installation by grouping same or differing models and capacities to be installed side by side. No side and rear clearance is required. However, all the fixed panels can be externally removed by the special unit stopper system. This facilitates additional ease of field installation, service and maintenance on the system. Please refer to Removing Fixed Panels section on this manual.

- 21 -

INSTALLATION All piping and wiring connections are designed from unit bottom. Proper openings should have already been cut on the raised floor by others.

Minimum Unit Clearance Model

Unit Height H, mm (inch)

02 to 05

Unit Width W, mm (inch)

Unit Depth D, mm (inch)

A, mm (inch) (Recommended)

B, mm (inch)

C, mm (inch)

874 (34.4)

Min 305 (12); Max 900 (35.5) Turning vanes is recommended for downflow (by others) others)

800 (31.5)

610 (24) Standard Discharge Plenum Height 457 (18) (optional for Upflow Model only)

749 (29.5)

07 to 13

1944 (76.5)

14 to 26

1464 (57.6) 2554 (100.6)

DISMANTLING UNIT FRAME The unit frame (center and side) can be dismantled. Thus the aluminium profiles can be pulled out. This offers the flexibility of the unit structure especially the unit is needed for site knocked down (SKD) due to site condition. Note that all fixed and access panels as well as the center frame (for model 07 to 26) must be removed prior to dismantle the unit frame. When this situation arises, it is recommended to inform factory upfront in order not to braze all piping joints. All joints, however, can be brazed at site by others. others.

Notes: It is the responsibility of the installing contractor / engineer to check the re-assembled unit structure is correct for each system installation. The warranty clauses are no longer valid for any possible damage or malfunction that may occur due to improper re-assembly of unit and piping work installation.

2

Removing the Center Frame (model 07 to 26 only) 1. From unit external, remove the cap. 2. From unit internal, unscrew the nut and remove the bolt.

1

3

1

3

2 4

Removing the Side Frame 1. Remove the first side M6 cap screw on nylon. 2. Remove the screw cover. 3. Remove the other two M6 screws. 4. Pull out the aluminium profiles.

- 22 -

INSTALLATION REMOVING FIXED PANELS All fixed panels are externally installed onto the unit cabinet by using special stopper system without using screws. The stopper system facilitates the removable of panels for additional ease of field installation, service and maintenance on the system.

2

Fixed Panel

Stopper Bars

3 3

1

1. Remove the bottom stopper bar. Gently tap the screw driver flat head into the mating surface between the nylon corner and the stopper bar. Then gradually pull the stopper bar out of its slot as shown.

2. Remove the top stopper bar. Repeat the steps as 1.

3. Remove the the left or right right side stopper bars respectively. Repeat the steps as 1. After all four side stopper bars have been pulled out; remove the panel from the unit cabinet.

To reinstall back the fixed panel, reverse the steps. Locate the panel on the frame. Note that the left and right side stopper bars have to be inserted prior to the top and bottom stopper bars.

- 23 -

INSTALLATION REMOVING FILTERS All units are supplied together with air filters. filters. Follow the below steps to withdraw the filters. 1.

2.

3.

Tilt the filter (bottom) as shown to allow it coming out from the filter rack and remove it from the unit.

One at a time, slide the other filters to the previous filter location. Follow the above steps to remove the filters from the unit.

Filter

Lift up the filter as shown until it touches filter rack (top).

Place in the new filters in reverse sequence of the above steps.

INSTALLING DISCHARGE PLENUM (OPTIONAL) Discharge plenum box is supplied separately which to be installed onto the unit by others at field. Follow the below steps to install the discharge plenum.

1.

2.

3. Screws

Place and align the plenum on top of the unit as shown.

Remove the pre-installed tapscrews from the supply air grille.

Make sure the bottom face of the plenum (or top of the unit frame) is adhered with rubber gasket.

Take out the supply air grille.

Fasten the plenum along 4 sides

Through the grille opening, fasten the plenum onto the unit using tapping screws on the prepunched holes at all 4 sides. Place back the supply air grilles.

- 24 -

INSTALLATION BELT TENSION INSPECTION GUIDE When installing or replacing belts, always use a complete set of new belts. Mixing old and new belts will result in the premature wear or breakage of the newer belts. Correct tensioning of V-belts drive is carried o ut as follows, 1.

Fit the belts into the grooves grooves and increase increase the centre centre distance until the belts are snug. (Note: Never lever belts over sheaves)

2.

Tighten belts and equalize belt slack so that it is on the same same side of belt for all belts. Failure to do so so may result in uneven belt stretching.

3.

As shown in figure, measure measure the span length (mm) of the drive. Determine the the deflection at the centre of the span according to the table belo w.

4.

Belt Span (mm)

Deflection (mm)

250-300 310-360 370-420

4 5 6

430-480 490-540 550-600

7 8 9

From table below, find the the appropriate deflection deflection force according according to belt belt type. The deflection force for any V-belt should be within the minimum and maximum force shown in the table. When the tension drops to the minimum value, readjust to the maximum value. Deflection Force (Kg) Belt Type Diam. Of smaller sheave (mm)

SPZ

SP A

SPB

Min.

Max

Min.

Max

Min.

Max

63-80

1.2

1.9

-

-

-

-

90-112

1.6

2.4

1.9

2.9

-

-

125-160

1.9

2.8

2.6

4.0

3.3

5.0

180-224

1.9

2.9

3.0

4.6

4.3

6.4

250-355

-

-

3.2

4.8

5.1

7.7

Note:

A new drive should be tensioned to the higher value. value. After the drive drive has been running for 30 minutes, the tension tension should be checked checked and readjusted to higher value.

- 25 -

INSTALLATION AIR-COOLED PIPING  

Direct expansion (DX) (DX) system units are are shipped pressurized with with a nitrogen charge. Remote air-cooled condensers condensers (DBRC) are are shipped pressurized with with a nitrogen charge. Notes: Excessive refrigerant line length reduces system capacity and efficiency, as well as system reliability (excessive refrigerant charge). Keep refrigerant lines as short as conditions permit! The pipe sizes/ refrigerant charges quoted are for guidance only. It is the responsibility of the installing contractor/ engineer to check the pipe sizes/ refrigerant charges are correct for each system installation. Split systems may require additional oil which should be added to the low side of each compressor. Design should be in accordance with accepted refrigeration practice to ensure good oil return to the compressor(s) under all normal operating conditions.

The interconnecting lines to the remote air-cooled condenser must be installed by a qualified refrigeration mechanic. Prior to connecting the tubes, make sure to apply bl ind caps or water proof tape to prevent dust or water from getting into the tubes. Max. Allowable Piping Equivalent Length

Elevation Difference between Indoor and Outdoor Units

75 ft (22.9m)

30 ft (9.2m)

PIPE SUPPORTS The table below identifies the maximum distance between pipe supports on horizontal and vertical pipe runs. All pipework should be clamped prior to apply insulation. Clamping over insulation is not acceptable. Pipe OD (inches)

Support Distance (meter)

3/8” to 7/8”

1.0

1-1/8” to 2-1/8”

2.0

FIELD PROVIDED PIPING AND WIRING

1.

2. 3. 4. 5. 6.

The required copper copper pipe diameters for discharge hot gas and liquid lines are shown on Performance Performance and Technical Data. Establish the shortest route for pipework from indoor unit to the outdoor condenser. Try to avoid unnecessary bends on piping as possible to minimize the total charge of refrigerant and the pressure drops. Lay the horizontal gas pipes with 1% downward gradient towards the refrigerant flow. Reduce the number number of bends which which must must be of large radius The liquid line of the system system must must be insulated insulated if passing passing through extremely extremely warm places. There must be a minimum minimum separation of 20mm between the the hot gas and liquid lines. If this is not possible possible insulate both lines. Oil traps are required required to be located every 15 to 20ft (4.6 to 6.1m) 6.1m) on hot gas line riser riser to ensure proper oil entrapment. Support both horizontal and vertical vertical pipes with vibration damping clamps clamps which should include rubber gaskets. gaskets.

- 26 -

INSTALLATION LONG REFRIGERATION PIPING Notes: Excessive refrigerant line length reduces system capacity and efficiency, as well as system reliability (excessive refrigerant charge). Keep refrigerant lines as short as conditions permit! The pipe sizes / refrigerant charges quoted are for guidance only. It is the responsibility of the installing contractor / engineer to check the pipe sizes / refrigerant charges are correct for each system installation. Split systems may require additional oil which should be added to the low side of each compressor. Design should be in accordance with accepted refrigeration practice to ensure good oil return to the compressor(s) under all normal operating conditions.

Long refrigeration piping system requires special consideration for the following concerns,  Oil return concerns  Minimum pressure drop on liquid line rise  Capacity losses  Additional refrigerant charge

Outdoor Condenser above Indoor Unit

Outdoor Condenser below Indoor Unit (Liquid Line Vertical Rise)

Discharge Line Riser

Discharge Line

Liquid Line Riser Liquid Line

For long discharge hot gas vertical riser, it is essential that oil separator (field supplied) must be installed in the system. Oil traps are also required to be located every 4m to ensure proper oil entrapment. In addition there should be an oil trap at the exit of the indoor unit before a vertical riser is applied.

Careful pipework selection must be done if the liquid line rises. Additional subcooling may be required to prevent flash gas occurring in the liquid line due to excess pressure drop. Careful pipe sizing is recommended to ensure that the liquid line does not have excessive pressure drop. Increasing liquid line pipe size can minimize pipe pressure drop.

Approximate discharge and liquid-line sizing up to 200 equivalent feet (61 meter) are shown in the table on next Approximate discharge and liquid-line sizing up to page. 200 equivalent feet (61 meter) are shown in the table on next page. Discharge check valves are recommended on long pipe runs or in cold climates (not on drawing). The recommended pressure drop should be between 2 to 4 PSI. Liquid-line velocity from the condenser to The recommended pressure drop should be between 3 to the expansion valve should be between 200 and 300 6 PSI. Minimum and maximum gas velocity for proper oil FPM. return should be 1000 FPM to 3000 FPM. Charging to a minimum of 10F (5.6C) subcooling is recommended to ensure a column of liquid is present at the TXV.

- 27 -

INSTALLATION Recommended Line Sizing Up To 200 Equivalent Feet (61 Meter) For Split Air Cooled Systems 100 EQUIV FEET [31 METER]

150 EQUIV FEET [46 METER]

200 EQUIV FEET [61 METER]

MODEL HOT GAS

LIQUID

HOT GAS

LIQUID

HOT GAS

LIQUID

02

3/4 [19.1]

1/2 [12.7]

3/4 [19.1]

1/2 [12.7]

3/4 [19.1]

1/2 [12.7]

03

3/4 [19.1]

1/2 [12.7]

3/4 [19.1]

1/2 [12.7]

3/4 [19.1]

1/2 [12.7]

04

3/4 [19.1]

5/8 [15.9]

7/8 [22.2]

5/8 [15.9]

7/8 [22.2]

5/8 [15.9]

05

7/8 [22.2]

5/8 [15.9]

7/8 [22.2]

5/8 [15.9]

1 1/8 [28.6]

5/8 [15.9]

07

7/8 [22.2]

5/8 [15.9]

1 1/8 [28.6]

5/8 [15.9]

1 1/8 [28.6]

5/8 [15.9]

09

1 1/8 [28.6]

7/8 [22.2]

1 1/8 [28.6]

7/8 [22.2]

1 3/8 [34.9]

7/8 [22.2]

11

1 1/8 [28.6]

7/8 [22.2]

1 1/8 [28.6]

7/8 [22.2]

1 3/8 [34.9]

7/8 [22.2]

13

1 1/8 [28.6]

7/8 [22.2]

1 3/8 [34.9]

7/8 [22.2]

1 3/8 [34.9]

7/8 [22.2]

14

7/8 [22.2]

5/8 [15.9]

1 1/8 [28.6]

5/8 [15.9]

1 1/8 [28.6]

5/8 [15.9]

16

7/8 [22.2]

5/8 [15.9]

1 1/8 [28.6]

5/8 [15.9]

1 1/8 [28.6]

5/8 [15.9]

19

1 1/8 [28.6]

7/8 [22.2]

1 1/8 [28.6]

7/8 [22.2]

1 3/8 [34.9]

7/8 [22.2]

22

1 1/8 [28.6]

7/8 [22.2]

1 3/8 [34.9]

7/8 [22.2]

1 3/8 [34.9]

7/8 [22.2]

26

1 1/8 [28.6]

7/8 [22.2]

1 3/8 [34.9]

7/8 [22.2]

1 3/8 [34.9]

7/8 [22.2]

Refrigerant Charge Guide The following table can be used to estimate the refrigerant charge quantity/circuit required in a typical split system installation. Indoor Unit (Air-Coole d)

lbs (kg) / circuit

DBA02

6.9

(3.1)

DBA03

7.2

(3.3)

DBA04

8.0

(3.6)

DBA05

8.2

(3.7)

DBA07

13.3

(6.1)

DBA09

17.0

(7.7)

DBA11

25.5

(11.6)

DBA13

27.9

(12.7)

DBA14

14.6

(6.6)

DBA16

14.6

(6.6)

DBA19

17.0

(7.7)

DBA22

25.5

(11.6)

DBA26

27.9

(12.7)

Additional Liquid Line Refrigerant Charge Guide Liquid Line Pipe Size

kg / meter

3/8”

0.05

1/2"

0.10

5/8”

0.15

3/4"

0.20

7/8”

0.30

1-1/8”

0.50

- 28 -

INSTALLATION LEAK TEST (SYSTEM PRESSURE TEST) 1.)

Leak test pressure is at 200psig [1380kPa]. [1380kPa]. Disconnect Disconnect or shut off all devices devices which may be damaged by 200psig [1380 kPa] test pressure.

2.)

Open all valves valves in system so that entire system system can be pressurized pressurized and connect connect refrigerant cylinder to charging connection.

3.)

Charge in freon freon vapor to the system system until 50psig [345 kPa] and then pressurize pressurize with dry nitrogen until 200psig [1380 kPa]. Stop charging gas if noise of escaping gas is heard. Skip to step 6. Caution: Caution: Always use inert gas such as nitrogen for testing. Never use other gases such as Oxygen or acetylene which may be infl ammable.

4.)

With pressure at 200psig [1380kPa], [1380kPa], shut off the valve valve connecting connecting nitrogen cylinder cylinder to the system. Disconnect nitrogen cylinder and leave pressure gauge indicating 1380kPa connected to system.

5.)

With halide torch torch or electronic electronic leak detector, detector, leak check every every valve, joint, pressure control, coils and headers. Mark every leak and record down as remarks.

6.)

When all leaks have been found, blow off charge through through tube to outside to prevent refrigerant refrigerant accumulation accumulation around the system.

7.)

Repair all leaks (check off on your remarks): remarks): If rebrazing is required, feed nitrogen nitrogen into the system system at slightly excessive pressure (leave system open and make sure nitrogen flows through).

8.)

After repairing leaks, re-check as per procedure 1 through 7.

9.)

When system tight after leak test, test, keep pressurized pressurized at 200psig [1380kPa] [1380kPa] and hold for 12 hours. Full in pressure should be negligible (some may be due to temperature change only.)

10.) When system system is tight, tight, proceed with with vacuum test and dehydration.

VACUUM TEST AND DEHYDRATION The purpose of evacuation is to evacuate the system when it is known or suspected that the system has been exposed to atmosphere, and there is a possibility that moisture has entered the system. 1.) Blow-off charge or pump down the refrigerant. 2.) Connect vacuum pump on the liquid line and carefully check check the unit piping to ensure all passages passages are open. (NEVER USE SYSTEM COMPRESSOR TO EVACUATE). 3.) Start vacuum pump pump operation and pull vacuum to about 2 to 2.5mmHg 2.5mmHg [0.26 to 0.33 kPa] absolute pressure. pressure. During evacuation the pressure may remain steady for sometime at about 0.5” or 12mmHg [1.69 kPa] absolute pressure. This is caused by moisture evaporating in the system. This "boiling off" or "evaporation period" last about the same period of time as it took from initial start to reach this point. 4.) When the "boiling off" period lasts longer that indicated under 3, break vacuum with with refrigerant or nitrogen gas to sweep moisture out and evacuate and dryer shells, etc., up to a temperature of 100°F [37.8°C]. 5.) Break vacuum with refrigerant or nitrogen nitrogen gas until pressure pressure is 0psig [0 kPa]. 6.) Re-evacuate to 1mmHg 1mmHg [0.133kPa] [0.133kPa] absolute absolute pressure. pressure. 7.) Disconnect vacuum vacuum pump and leave system system standing for 6 hours. hours. There should be no change in vacuum vacuum during this period. If there is a change repeat 1 to 7.

CHARGING 1.) Connect refrigerant refrigerant cylinder through charging connection connection to charging valve. 2.) Loosen flare nut on other end of charging connection and blow air out with refrigerant. Tighten flare nut on charging connection. 3.) Weight refrigerant cylinder. 4.) Open charging valve and charge in refrigerant vapor vapor through suction access valve valve until about 150psig [1034 kPa]. Switch to liquid line access valve and charge in liquid refrigerant. Continue charging with liquid refrigerant until clear glass is observed. 5.) Shut off refrigerant charging valve but keep keep connected. Check charging charging valve flare nut for leak. Check Check and record down discharge and suction pressure. If more than one system to be charged, follow procedure 1 through 4 for each system. After all the systems have been done up to step 4, proceed with 5 and 6. 6.) Shut off the system system (compressor, (compressor, fans, pumps) and leave leave for 24 hours.

- 29 -

INSTALLATION SYSTEM CHECK FOR OVERCHARGING Because system reliability depends on proper refrigerant charge, it is very important that the system is thoroughly checked for superheat and oil temperature after the unit has stabilized. A final check should be made after the room is stabilized and the unit is fully loaded.

WATER CONNECTIONS Chilled Water Piping It will be necessary to install inlet and outlet pipes on unit with chilled water coils. The diameters of the pipes are indicated on the Performance and Technical Data.

Indoor Unit

To ensure proper water circuits installation, it is recommend the following, 1. 2. 3. 4. 5. 6.

Use pipes made of copper or steel. Support pipes with suitable brackets. brackets. Insulate all pipes with Armaflex type insulation. Install shut-off valves to facilitate maintenance. Install a thermometer on the inlet and outlet pipes. Install a pressure pressure gauge on the inlet and outlet pipes. pipes. Install a drain outlet in the lowest part part of the circuit. circuit.

Use a water or glycol solution where necessary.

- 30 -

INSTALLATION HUMIDIFIER (OPTIONAL) General Steam humidifier is an optional item and it is installed and integrated within the function and method of operation of the unit. The humidifier produces non-pressurized steam by means of electrodes immersed in the water contained in the cylinder. The humidifier uses normal main water for the production of steam. The conductivity of the water should be within the range of 75 to 350 µS/cm. The steam is introduced into the airflow by means of distributor via steam hose installed in the unit. The humidifier is necessary to be connected a supply pipe.

Supply Connections The steam humidifier is installed and electrically connected in the unit. Initially the humidifier cylinder is empty. Ensure a water supply is available to the humidifier with the following characteristics,  Pressure between 1 and 8 bar (14.5 and 116psi) o  Temperature between 1 and 40 C The water supply connection to the humidifier should have an internal diameter of at least ¼ inch (6mm). A waterline shutoff valve and mechanical filter must be installed (by others) outside the unit to trap any solid impurities and for future disconnection and service.

Steam Supply

1. 2. 3. 4. 5. 6. 7.

Frame Cylinder Drain Solenoid Valve Drain Connection Supply Tank + Conductivity Meter Cylinder Lock Strap Fill Solenoid Valve

Humidifier within Unit

Supply Connection (by others)

Supply

4 Filter

Drain

Valve

Replacing the Cylinder Warning: The cylinder may be hot. Allow it to cool before touching it or use protective gloves.

To access the cylinder, water contained in the cylinder  Completely drain the water  Turn the appliance off and open the main power power disconnecting switch switch (safety procedure) the steam hose from the cylinder  Remove the connections from the top top of the cylinder  Disconnect the electrical connections cylinder from the fastening fastening device and lift it up to remove remove it  Release the cylinder cylinder in the humidifier by performing the previous previous operations in reverse  Fit the new cylinder

Periodical Checks After 1 hour of operation

Check that there are no significant water water leaks

Every 15 days or no more than 300 operating hours

Check that there are no significant water leaks and the general condition of the container. Check that during operation there are no arcs or sparks between the electrodes

Every 3 months or no more than 1000 operating hours

Check operation that there are no significant water leaks. If necessary replace the cylinder

Annually or no more than 2500 operating hours

Replace the cylinder

After extended use or alternatively when using using water with a high salt content, the solid deposits that naturally form on the electrodes may reach the stage where they also stick to the inside wall of cylinder; in the event of especially conductive deposits, the consequent heat produced may overheat the plastic and melt it, and, in more severe case, puncture the cylinder. As a precaution, check, at the frequency recommended further on, the deposits and the blackening of the wall of the cylinder, and replace the cylinder if necessary.

- 31 -

INSTALLATION OPERATION Humidification is provided by an electrode boiler. The sealed humidifier design ensures that only clean sterile steam is supplied to the conditioned area and corrosive salts and minerals are held in the disposable bottle. The humidifier features modulating capacity output control as standard. The system provides continuous modulation of steam output in response to a proportional control signal. The output control range is 20% to 100% of the humidifier rated value and is designed to give an approximate steam output of +/-5%, thus ensuring precise control of the conditioned space. The cylinder operating life time is automatically optimized via the integrated water conductivity sensor which combined with the Vision 2020i controller to monitor and regulate the water refill cycle to reduce excessive salt deposits and the progressive wear of the cylinder. All humidifier parameters and alarms are accessible and adjustable via the microprocessor display keypad unit. T he main features include,  Supply water conductivity (μS/cm)  Required steam output (kg/h)  Actual steam output (kg/h)  Required current rating (A)  Actual current rating (A) Status mode (Start Up, Running, Filling or Draining)

MODULATING HOT GAS REHEAT FOR DX SYSTEM Hot gas reheat system is an alternative to electric heating and is only available in the DX-System. The system exploits a part of the heat released to the condenser to reheat the cooled air after it has passed through the evaporator coil destined for the room being conditioned, thereby achieving a worthwhile energy saving. The system incorporates a hot gas reheat coil located downstream of the evaporator coil with modulating valve which is completely integrated to the unit’s microprocessor control. This method of reheating is far more efficient than existing electric heating as no further power input is required over the standard power requirement. For units with two refrigerant circuits, each circuit can operate independently, giving the unit the ultimate flexibility to satisfy space temperature and humidity control. Features and Benefits  When room temperature has reached its set point but room humidity is still above its set point, the hot gas reheat valve will start to modulate the amount of hot refrigerant gas passing through the reheat coil.  Since the amount of hot refrigerant gas passing through the reheat coil is modulated, the system delivers only the amount of reheating that is required.  Room condition is uniform and consistent because there will be no drastic swings in the supply air temperature and humidity that are inherent with electric heaters on/off staging control.  Refrigerant piping, valves and reheat coil are all factory installed. Typical field connection of discharge line and liquid line between the condensing unit and the indoor unit i s only required.  Controls are factory configured and are adjustable at field to suite site’s requirement and application.

REMOTE AIR COOLED CONDENSER (DBRC) Rigging Move the unit to the installation location using a crane or fork lift. Each fan section has heavy steel leg supports with lifting holes at the top. Do not lift with a choke sling around the unit. Spreader bars are recommended for lifting multiple fan units. Under no circumstances should the coil headers or piping be used for lifting or moving the unit.

Leg Assembly The legs must be unbolted from the shipping position and extended prior to placing the unit on its pad. Each leg extends down approximately 18 inches [457mm] and reattaches using the same bolts.

Heat Exchanger Piping Connections The inlet connection is located on the top header on all units. The outlet connection is located on the bottom header of all units.

Locating the Unit: Unit : In installing the condensing units, considerations should be given to the following, 1.) Installed outside the building or ensure sufficient sufficient air to the condenser. 2.) Strong foundation to withstand withstand the unit's weight weight and vibration. If the base was not leveled, use concrete concrete blocks as base 3.) Sufficient space space for wiring wiring and maintenance maintenance as per local legislation. 4.) Location where there is no direct heat source such such as near a generator. This is because if the entering entering air temperature is high, then the unit will operate at high condensing temperature and subsequently trip on high pressure (during cooling mode). 5.) Location where the unit is not exposed exposed to oily area, salty atmosphere, atmosphere, and sulphide gaseous area. Note: Condenser fans are of the propeller type type and not suitable for use with ductwork. ductwork. The remote heat exchangers must be located in an area that will ensure free air flow into and out of the unit. T he unit should not be placed closer than 36 inches [914mm] from any wall or other obstruction. When two or more units are used in the same area, space them apart by a minimum of 48 inches [1219mm].

- 32 -

INSTALLATION DIMENSIONAL CLEARANCE - REMOTE AIR COOLED CONDENSER (DBRC) (A) Vertical Installation (Recommended) s ) e h m c m n 0 i 0 8 0 1 3 1 (

s ) e h m c m n 4 i 1 6 9 3 (

36 inches (914mm)

36 inches (914mm)

36 inches (914mm)

36 inches (914mm)

s ) e h m c m n 4 i 1 6 9 3 (

(B) Horizontal Horizontal Installation If remote condenser unit should be installed horizontally, additional brackets or supports (where necessary) must be provided to ensure rigid installation by others at field. Locate the units where air is allowed to circulate. If installing two units together, make make sure that the discharge discharge air from one unit were not circuited by the other unit. See figure.

s ) e h m c m n 4 i 1 6 9 3 (

118 inches (3000mm)

s ) e h m c m n 4 i 1 6 9 3 (

- 33 -

OPERATION ELECTRICAL CONNECTIONS IMPORTANT: IMPORTANT: Before proceeding with the electrical connections, make certain that the volts, hertz, and phase correspond to that specified on the unit rating plate. Also, check to be sure that the service provided by the utility is sufficient to handle the additional load imposed by this equipment. Refer to the unit rating plate for equipment electrical requirements. The attached typical wiring diagrams show the proper field high and low voltage wiring. Make all electrical connections in accordance with national electrical code and any applicable local code ordinances. Use copper conductors only. WARNING: The unit cabinet must have an uninterrupted electrical ground. An electrical ground wire of adequate size must be connected to the ground lug provided inside the control box. A ground wire is mandatory with microprocessor controls. Supply voltage at the unit must be within 10% of the voltage indicated on the nameplate. Phase-to-phase imbalance must not exceed 3%. Local utility company should be contacted for correction of improper line voltage. Improper electrical power supply may cause premature failures, which will void unit warranties. The computer-room unit and the condenser unit require individual power sources. For auxiliary-equipment control wiring, such as for the remote condenser, bring NEC Class-2 wires to the control box and connect to the terminals indicated on the unit wiring diagram. Wiring terminal numbers will typically be the same in the computer-room unit and the remote heat exchanger. Verify terminal numbers on unit and heat exchanger wiring diagrams before connecting wiring. Verify that properly sized fuses or circuit breakers are installed in the remote-mounted disconnect switch. Fuse size and minimum circuit ampere are listed on the unit nameplate. Check the wiring connections in the unit control panel to ensure that they are tight. Wiring connections may become loose in transit.

CHECK FOR CORRECT PHASING The equipment should now be checked for correct phasing through the keypad. Switch the blower manual override to the “ON”, then back to “OFF”, or remove fuses from compressor high voltage circuit and push the “ON/OFF” button located on the front panel. A short start delay will take place as indicated on the screen. The blower motor will start, and it will be possible to determine blower rotation. Compressors, heaters and humidifiers are not affected by phasing. Disconnect power from the unit and reverse two of the three power wires to change rotation.

UNDER-FLOOR WATER-DETECTION PROBE (OPTIONAL) This control panel includes a condensate probe, which must be mounted below the unit against the floor area where water may collect. Place it below the unit.

DBG5 4.3” Color Touch Screen Display

ALARM PROCESSOR VISION 2020i Controller Microprocessor Microprocessor based controller 32 Bit, 44 MHz MHz CPU.  Built-in flash memory ( 2 + 2MB ). parameters on EEPROM &  Non-volatile storage of program & parameters Flash Memory. battery as standard.  Built-in clock with battery  Add-on communication protocol cards for various supervisory communications. 

Touch Screen Display With Led Backlight The unit comes together with a 4.3” Color Touch Screen Display Panel. Graphical screen screen resolution is 480 X 272 pixels with with 65k colors. The screen also has a LED backlight with adjustable brightness control. Display panel is built-in with flash memory 128MB and DDR2 RAM of 256MB with Microsoft Windows CE 6.0 operating system. The monitor displays temperature, humidity, all set points, cooling, humidification, dehumidification, heaters, percentage of chilled-water capacity (valve opening), percentage of cooling capacity (compressors and energy saver), percentage of heating and humidification capacities, average percentage of all capacities for last hour of operation, component run times, alarm history, diagnostics and all alarms listed in alarm section. Manual override of blower, cooling 1, cooling 2, heating 1, heating 2, heating 3, humidification and remote alarm operated via display.

Control Switches Touch-button on/off, Touch-button menu, Touch-button alarm silence/program set (See figure above).

- 34 -

OPERATION Standard Alarms High temp, low temp, high humid, low humid, manual override, under floor water detection, no air flow, dirty filters, humidifier failure, low-voltage warning, fire stat, compressor short cycle, power failure restart, humidity-sensor failure, temperature-sensor failure, maintenance required based on programmed run time, high pressure, low pressure, no water flow, smoke alarm, main fan motor overload. On energy-saver units, one programmable local alarm input (#3) is to be used to change from compressor operation to chilled-water operation. Display will switch to energy saver with percentage of valve-opening display on screen. On units with compressors, option input (#1) is used for a highpressure alarm.

Software Software has menu-driven programming. Password is required. Opening of unit door not required for the following: Temperature set point, temperature dead band, temperature high and low alarm points, temperature sensor calibration, time delay between stages (sequential load activation), unit-start time delay, set tone of alarm buzzer, set DC voltage range for control valve, set hours of operation until appearance of maintenance-required alarm message, set power-failure restart method. Factory settings include periodic chilled-water or energy-saver coil flush, lowvoltage dropout point 90%, predictive humidity control, temperature anticipation, automatic lead-lag rotation of compressors and reheat.

Data Collection The microprocessor will log data for the following items: Run times of fan motor, cool 1, cool 2, heat 1, heat 2, heat 3, humidification, dehumidification, chilled-water operation and energy-saver operation. Temperature, humidity and capacity readings will be taken every three minutes and recorded on the unit data base for the past 24 hours. An alarm data base will be maintained for the last 10 alarms and the time since occurrence. All data may be displayed at the unit without any additional equipment.

Communications The unit can communicate over an RS 485 network using a twisted pair of wires in a token ring loop. All data may be transmitted to and displayed at an optional remote-mounted DB-Aire Network. Optional RS 485 or 232 card can be fu-fitted for modem or MODBUS communication communication protocol.

Diagnostics All electronic circuitry contains built-in diagnostics. No additional external devices are required. Automatic selfdiagnostics shall take place when power is applied to the unit. Manual diagnostics will be available with selfprompting instruction displays.

CONTROL LOGIC Compressor Cooling Logic 1. 2. 3. 4.

Maximum frequency frequency of primary compressor compressor starts = 5 minutes minutes start of same same stage Primary compressor compressor stage minimum minimum time off = 2 minutes stop stop to start of same stage Secondary un-loader stage minimum minimum time off = 1 minute stop stop to start of same stage Compressor staging sequence at each adjustment period: C1 On at temp set point + temp dead band C2 On at temp set point + temp dead band + 0.3°F C2 Off at temperature set point + temperature dead band C1 Off at temperature set point

Heat Strip Heating Logic 1. Minimum time between between heat stage turn on = 1 minute stop to start of same stage stage or start to start of different stages. 2. Heat staging sequence: H1 on at temperature set point -Temperature dead band - 0.3°F H2 on at temperature set point - Temperature dead band - 0.6°F H3 on at temperature set point - Temperature dead band - 0.9°F H3 off at temperature set point - Temperature dead band - 0.6°F H2 off at temperature set point - Temperature dead band - 0.3°F H1 off at temperature set point - Temperature dead band

Humidification Logic 1. 2. 3. 4.

All heat Off immediately immediately during during humidification Minimum time stop to start = 1 minute Minimum time time between humidification humidification / dehumidification changeover = 5 minutes minutes Humidification staging sequence: H1 on at humidity set point - humidity dead band H1 off at humidity set point - 1%

- 35 -

OPERATION Dehumidification Dehumidification Logic 1. Dehumidification is not governed by the adjustment rate but will will not violate compressor short-cycle short-cycle times. 2. Heating stages are used to reheat reheat the over-cooled but dehumidified air and heating heating short-cycle time time will not be violated 3. Five minute minimum minimum between humidification humidification and dehumidification dehumidification cycles 4. One minute minimum minimum between stop stop to start of dehumidification 5. Dehumidification staging sequence: Energy-saver or chilled-water chilled-water cooling proportionally increase increase or decrease as required, up to maximum valve opening if available. Compressoring units C1 On at humidity set point + humidity dead band C2 On at humidity set point + humidity dead band + 1% C2 Off at humidity set point + humidity dead band C1 Off at humidity set point

Energy-Saver Cooling Logic 1. Energy saver function is always always used any time programmable alarm point #3 has been set for energy - saver operation and is powered. 2. Compressors will not be used with energy saver saver to hold set point. point. 3. Energy-saver staging sequence: Water valve is On at temperature set point + temperature dead band. Water valve modulates every 60 seconds to maintain set point. Water valve is Off at temperature set point

Chilled-Water Chilled-Water Cooling Logic Chilled-water staging sequence: water valve is on at temperature set point + temperature dead band. Water valve modulates every 60 seconds to maintain set point. Water valve is off at temperature set point.

Automatic, Periodic Coil-Flush Logic Control will automatically flush chilled water or energy-saver coil and reheat coils. Control valves open 25% every 100 hours of operation for a period of 30 seconds.

Humidity Anticipation Logic Control will automatically modify humidity set point to stop unnecessary humidification and dehumidification. Humidity set point is modified based on return air temperature. This prevents humidification and dehumidification if not required based on changing temperature to 70°F.

Manual Override Logic Any manual override function will cause all automatic temperature and humidity control by the processor to be discontinued. This will allow installers to easily run each function during start-up.

Temperature And Humidity Sensor Failure Logic 1. A temperature-sensor temperature-sensor failure will cause the processor to activate all stages of cooling if the unit is operating at the time of failure. If self-test finds a bad sensor on start-up, the unit will not be allo wed to start. 2. A humidity-sensor failure will will cause the processor to discontinue discontinue all humidification and dehumidification control control if the unit is operating at the time of failure. If self-test finds a bad sensor on start-up, the unit will not be allowed to start.

Compressor Short-Cycle Alarm Logic If the compressor has started 10 times within the last hour, the alarm sounds. The minimum time between primary compressor starts automatically increases from 5 to 6 minutes for the next hour of operation.

Power-Failure Restart Alarm Logic Unit restarts based on program selection.

No Air Flow Alarm Logic A no air flow alarm will prevent unit operation of cool, heat, humidification or dehumidification, for unit to operate, microprocessor must have proven air flow.

Program Selections Operate from front panel with door closed. After 60 seconds without an input, display will return to normal.

- 36 -

OPERATION PIPING SCHEMATIC (A) DX/ Dual Coil System Only (I) Model 02 - 13 (Single Compressor)

(II) Model 14 - 26 (Dual Compressors)

- 37 -

OPERATION (B) DX/ Dual Coil System With EEV (I) Model 02 - 13 (Single Compressor)


- 38 -

OPERATION (C) DX System With Hot Gas Reheat (I) Model 02 - 13 (Single Compressor)


- 39 -

MAINTENANCE INSTRUCTIONS MAINTENANCE These units are designed to provide years of services with minimum maintenance. Nonetheless, it is a good practice to carry out regular inspection and checking to ensure the unit's optimum performance. ITEM

MAINTENANCE PROCEDURE 1. 2.

Air Filters

3.

4. 1. 2. Belt

3.

Disposable type. The filters should be checked and changed periodically. When they become dirty, an alarm is activated by the clogged filter switch. If the filters are dirty, they must be changed for efficient operation of the system. To check check the alarm indicator, indicator, cover cover approximately approximately 75% of the return air opening; the alarm should energize. If the alarm energizes prematurely or does not energize when it should, adjust the filter switch. All doors to machine machine should remain closed before before determining whether an adjustment is necessary.

RECOMMENDED SCHEDULE

Spare filters should be kept in stock. Filters should be checked and replaced monthly or depending upon the condition of the circulated air

Belt tension should be checked checked every month to assure proper, efficient operation. If retensioning retensioning is needed, slightly loosen the four motor-mounting bolts. Turn the adjusting screw Every months. (located in the end of the motor mounting channel) until the belt is properly adjusted. Retighten the four mounting bolts.

1.

Make sure the set screws are properly tightened and Once every six months. there is no crack on the pulley.

1.

Turn the blower blower manually. manually. It should should run smoothly and Once every six months. there is no excessive bearing noise.

Bearing and Shaft

1.

Check for evidence of wear.

Bolts, Screws and Nuts.

1.

Tighten any loose components.

Coil

1.

Check and remove clogged item between fins.

Once a year.

Paint

1.

Check any evidence of corrosion.

Once a year.

Compressor

1.

Check if there is any leakage.

Every six months.

1.

Check voltage, current and wiring.

2.

Check connections.

1.

The heating heating elements elements are finned finned type and require no maintenance.

1.

Replacement Replacement of the humidifier cylinder.

1.

Pour some water water into the drain pan and let the water Every six months. run through. If the pipe is clogged, remove the dirt.

1. 2.

Inspect all piping for for leaks and clearance. Piping must must be properly properly supported supported and must not be Every six months. allowed to vibrate or rub against other pipes or structures.

1. 2.

Check glycol concentration and inhibiter level. Inhibiter level prevents corrosion corrosion and percent of glycol concentration prevents freezing. Every six months. Contact a local water-treatment company in the area for recommendations based on local water conditions.

Pulley Blower

Electrical Heating Elements

Humidifier

Drain Pan and Pipe

Piping

Glycol

3.

- 40 -

Once a year. Once a year.

Every two months.

See humidifier section or humidifier manufacturer’s manual for details.

MAINTENANCE INSTRUCTIONS TROUBLESHOOTING CHART

- 41 -

MAINTENANCE INSTRUCTIONS

- 42 -

MAINTENANCE INSTRUCTIONS SAMPLE LOG SHEET

SHEET NO........................... NO...........................

DUNHAM-BUSH PRECISION AIR-COND UNIT UNIT MODEL NO. ........................................................ UNIT NO. .................................... ....................................VOLTS: VOLTS: ........................ ........................ Hz..................... Hz..................... UNIT SERIAL NO. .................................... ........................................................................ ........................................................................ ............................................. ......... START UP :

DATE .......................................... .......................................... TIME .................................................... ....................................................

DATE TIME COMP. NO. 1. SUCTION PRESSURE

2. 3. 4. 1.

SUCTION TEMPERATURE

2. 3. 4. 1.

DISCHARGE PRESSURE

2. 3. 4. 1.

DISCHARGE TEMPERATURE

2. 3. 4. 1.

DISCHARGE SUPERHEAT (DISC. TEMP.-SAT. DISCH.)

2. 3. 4. 1.

SUCTION SUPERHEAT (SAT. SUCT .- SUC. TEMP)

2. 3. 4.

RETURN AIR TEMPERATURE – DB/WB SUPPLY AIR TEMPERATURE – DB/WB AIR VOLUME AMBIENT AIR TEMPERATURE OFF CONDENSER AIR TEMPERATURE 1. COMPRESSOR AMPS

2. 3. 4.

CONDENSER FAN AMPS EVAPORATOR FAN AMPS VOLTS This log sheet is provided as a recommendation of the readings that should be taken on a periodic basis. The actual readings taken and the frequency will depend upon the units application, hours of use, etc. This type of information can prove very useful in preventing and/ or solving problems that might occur during the life of the unit.

- 43 -

GUIDE SPECIFICATIONS SPECIFICATIONS This specification describes requirements for precision air conditioning system. The system shall be designed to maintain precised temperature and humidity conditions for applications such as computer server rooms, telecommunication facilities, clean rooms, laboratories, etc. The precision environmental control system shall be factory assembled, DB-Aire II model vertical floor mounted by Dunham-Bush Industries, Malaysia.

low ambient application, the system shall also be designed to operate at _____°F/_____°C DB ambient temperature.

DESIGN REQUIREMENTS



The CW system system shall be supplied with chilled water with an entering water temperature of ______°F/______°C and leaving water temperature _____°F / _____°C.



The unit shall be supplied with _____/_____/______ (Volt/Phase/Hz) electrical service.



(A) Direct Expansion (DX) System 







The system system shall have have a total cooling cooling capacity of _____MBH /_____kW and a sensible cooling capacity of _____MBH /_____kW based on an o o entering air temperature of _____ F /_____ C o o DB and _____ F /_____ C WB.

The unit shall be supplied with _____/_____/_____(Volt/Phase/Hz) electrical service.

The system system shall have have a total cooling cooling capacity of _____MBH /_____kW and a sensible cooling capacity of _____MBH /_____kW based on an o o entering air temperature of _____ F /_____ C o o DB and _____ F /_____ C WB. The system shall be supplied with chilled water o with an entering water temperature of _____ F / o _____ C and leaving water temperature o o _____ F /_____ C.



The unit shall be supplied with _____/_____/_____ (Volt/Phase/Hz) electrical service. The unit shall be of Upflow configured model.

The system system shall have have a total cooling capacity of ______MBH /______kW and a sensible cooling capacity of ______MBH /_____kW based on an o o entering air temperature of _____ F /_____ C o o DB and ______ F /_____ C WB.



The system shall be designed based on o o _____ F /_____ C DB ambient temperature. For low ambient application, the system shall also be o o designed to operate at ______ F/______ C DB ambient temperature.



The unit shall be supplied with _____/_____/_____ (Volt/Phase/Hz) (Volt/Phase/Hz) electrical service.









/ Downflow

(B) Chilled Water (CW) System 



The DX system shall shall be designed based on _____°F /_____°C DB ambient temperature. For

/ Downflow

1.1 Cabinet

(C) Dual Coils (DX + CW) System The system system shall have a total cooling capacity capacity of ______MBH /______kW and a sensible cooling capacity of _____MBH /_____kW based on an entering air temperature of _____°F /_____°C DB and _____°F /_____°C WB.

The unit shall be of Upflow configured model.

1 STANDARD FEATURES (ALL SYSTEMS, INDOOR UNIT)

/ Downflow



/ Downflow

(D) Direct Expansion (DX) System with hot gas reheat

The system shall be designed based on o o _____ F /_____ C DB ambient temperature. For low ambient application, the system shall also be o o designed to operate at _____ F/_____ C DB ambient temperature.



- 44 -

The cabinet comprises an anodized aluminium frame of epoxy powder coated black color paint with nylon corners and removable steel sheet panels. All panels shall be externally installed onto the cabinet by using special stopper system without using screws. The stopper system shall also facilitate the removable of panels for additional ease of field installation, service and maintenance on the system. All panels and access doors shall be fabricated from sturdy heavy gauge of 1.0mm steel sheets with epoxy powder coated oven baked black color paint to provide a durable finish. All panels shall be of 25mm (1 inch) thick 3 single skin and lined with minimum 2lbs/ft density thermal and acoustical fiberglass insulation with fire resistant of Class O (BS 476 Part 6, 7). The system shall be designed for front access only with hinged and lock type full height doors.

GUIDE SPECIFICATIONS SPECIFICATIONS 1.2 Filters The system shall be provided with 2 inches (50mm) deep (for model 02-05) or 4 inches (100mm) deep (for model 07-26) extended surface pleated disposable type filters rated for MERV8 efficiency to ASHRAE 52.2 standard (equivalent to EU4). Filters shall be withdrawable from the front of the unit.

coil located downstream of the evaporator coil with modulating valve which is completely integrated to the unit’s microprocessor control. For units with two refrigerant circuits, each circuit shall operate independently with its own modulating valve.

1.7 Electrical Circuits Circuits The system shall be provided with a factory installed electrical enclosure as per local code requirements. Control voltage of the system shall be 24Vac. The fan motor(s), compressor(s), electric heaters, humidifier (if applicable) shall have their own circuit breaker and contactor. The electrical circuit shall have provision for user to cut off control power during fire / emergency shutdown

1.3 Blower Assembly Blowers shall be belt driven double-inlet-doublewidth (DIDW), statically and dynamically balanced with multiple forward curved blades mounted on a solid steel keyed shaft. Heavy-duty V-belt fan drive (sized for 200% safety factor) with cast iron pulleys keyed and secured to the blower shaft shall be provided.

1.8 Control System – Vision 2020i Controller 1.4 Motor Assembly Motors shall be of totally enclosed fan cooled (TEFC) with IP55 enclosure rating. Motors shall be mounted to an adjustable motor frame. Motor pulleys shall be cast iron, keyed and secured to the motor shaft.

1.5 Evaporator Air Discharge 1.5.1 Up-Flow (Front Free Return) The system shall be configured for up-flow pattern with front free evaporator return air and top evaporator air discharge. The system shall be supplied with grilles on the cabinet doors for front return air configuration. Upflow systems are available with optional Discharge Plenum.

1.8.1 Controller and display The unit shall be provided with Vision 2020i control system with the following features,  The

control algorithm and parameters shall 2 be stored in flash memory and E PROM of the controller and shall retain even in the event of power failures, without requiring a backup battery

 4.3”

graphical touch terminal with 65k color display

 Built

in memory for data logging

Temperature and  Temperature  Configurable

The system shall be configured for down-flow pattern with top free or ducted evaporator return air and bottom evaporator air discharge through the raised floor.

by user

 Alarm status/display  Analog  Digital

1.5.2 Down-Flow (Top Free or Ducted Return)

humidity controlled

input/output display

input/output status

 Remote start/stop input  Digital Digital

input for customer input alarm

 General General

alarm output (dry contact)

 Self-diagnostics  Security

password access with multiple access level for advanced settings

1.6 Electric Reheat Reheat or Hot Hot Gas Reheat 1.6.1 For Direct Expansion (DX) System, Chilled Water (CW) System and Dual Coils (DX+CW) System only. The electric reheat shall be factory installed low watt density finned-tubular nickel plated element heater with overheat safety controls. The electric reheat shall be of three equal stages giving a more accurate controlled response to the room requirement. 1.6.2 For Direct Expansion (DX) System with Hot Gas Reheat only The unit shall incorporate a hot gas reheat

- 45 -

 Unit

status information: •

•

• •

display

with

following

Current room temperature temperature setpoint

and

Current room relative humidity relative humidity setpoint

and

System ON/OFF Operating mode (cooling/ humidifying/ dehumidifying)

heating/

GUIDE SPECIFICATIONS SPECIFICATIONS 1.8.2 Alarm Monitoring When the system is in alarm condition, the system shall activate an audible buzzer and visual alarm message on the terminal display. A digital output (dry contact) shall be closed to indicate the alarm condition. The following alarm conditions shall be monitored by the controller:

2 DIRECT EXPANSION EXPANSION (DX) (DX) SPLIT SPLIT SYSTEMS SYSTEMS WITH REMOTE OUTDOOR AIR COOLED CONDENSER (DBRC MODELS) 2.1 Scroll Compressor Compressor shall be mounted on the base via vibration isolators. Compressor shall be charged with polyolester oil and designed for use with R407C refrigerant.

 High room temperature  Low room temperature  High

2.2

supply air temperature

The refrigeration system shall be of the direct expansion type with one (Model 02-13) or two (Model 14-26) hermetic scroll compressors complete with rotalock connections. All refrigeration circuit shall be pre-piped with copper tubing and include expansion valve with external equalizer, filter dryer, sight glass, refrigerant service valves, pressure fittings of manual reset high pressure control/auto reset low pressure safety cutouts and charging/access ports in each circuit.

 High room humidity  Low room humidity  No

air flow/loss of air flow

 Filter dirty  Sensor failure

Evaporator fan  Evaporator

overload alarm

Customer interlock  Customer

alarm

 Unit/

Compressor running hours threshold exceeded

 LAN network disconnected alarm  High/Low

refrigerant pressure alarm (DX

2.3

models) water flow switch alarm (chilled water models)

 Humidity Alarms

floor water detector alarm (optional)

 Smoke Smoke detector

alarm (optional)

1.8.3 Master-Slave Sequencing Control When more than one unit is present in the system, master-slave or duty-standby control of this group of units shall be done by just connecting controller of each unit in serial and require no additional controller. 1.8.4 BMS communications and remote monitoring ModBus RTU RS485 communication port shall be a standard feature of the controller. On top of that, the following options shall be available for BMS communications and remote monitoring:

2.4

Remote Outdoor (DBRC Models)

Air

Cooled

Condenser

The remote condenser shall be constructed from sturdy heavy gauge steel sheets with epoxy powder coated oven baked, factory standard beige color to provide a durable finish. The remote condenser shall include direct driven propeller fans, condenser coil, fan guard, thermally protected rated IP55 motors, integral factory wired and tested control panel. The condenser coil shall be quality construction of seamless copper tube, mechanically bonded to aluminium fins with galvanized coil plates. The coil shall be factory leak and pressure tested to 450psig (31 bar) and the refrigeration system shall be sealed prior to shipment.

 ModBus TCPIP

BACnet  BACnet

Evaporator Coil The evaporator coil shall be of draw through air design for uniform air distribution. The evaporator coil shall be quality construction of seamless copper tube, mechanically bonded to hydrophilic aluminium fins with galvanized coil plates. The coil shall be factory leak and pressure tested to 450psig (31 bar) and the refrigeration system shall be sealed prior to shipment. A galvanized and painted drain pan shall be provided to cover the entire coil area. The drain pan shall be designed to incorporate sloped gutter for complete condensate removal.

 Chilled

 Under Under

Refrigeration Circuits

TCPIP / PTP / MSTP

 LONworks  GSM Modem  SNMP

The evaporator and condenser sections shall ship with a dry-nitrogen holding charge ready for field refrigerant charging.

- 46 -

GUIDE SPECIFICATIONS SPECIFICATIONS 3 3.1

CHILLED WATER (CW) SYSTEMS

4.6

All panels shall be provided with galvanized internal skin.

Chilled Water Coil The evaporator coil shall be of draw through air design for uniform air distribution. The chilled water coil shall be quality construction of seamless copper tube, mechanically bonded to hydrophilic aluminium fins with galvanized coil plates. The coil shall be factory leak and pressure tested to 450psig (31 bar) and sealed prior to shipment. Copper pipe for brazed connection shall be provided as standard. A galvanized and painted drain pan shall be provided to cover the entire coil area. The drain pan shall be designed to incorporate sloped gutter for complete condensate removal.

4.7

4.8

4 4.1

OPTIONS

A remote water leak detector shall be factory provided for field installation. When water leak is detected, cooling mode of the unit is off.

A smoke detector shall be factory supplied at unit’s evaporator return air section. The unit shall shut down when smoke alarm is triggered. 4.12 Variable Frequency Drive Drive (VFD) for Evaporator Evaporator Blower Motor

Discharge Plenum (Up-flow Units only)

A variable frequency drive (VFD) for blower motor shall be factory installed to vary the blower motor speed based on room’s requirement. 4.13 BMS communication cards BMS communication card shall be factory installed to enable high level interfacing with BMS system. ModBus, BACnet, LONworks, SNMP communication protocols shall be available as option.

Steam Generating Humidifier

4.14 Electronic Expansion Expansion Valve (EEV) (EEV) for Evaporator Coil

Hot Gas Bypass (DX Systems only) The refrigerant circuit(s) shall be provided with a hot gas bypass system for evaporator freezeprotection and capacity modulation during low load conditions.

4.5

for

4.10 Under Floor Water Detector Detector

Stainless Steel Drain Pan

Humidifier shall be factory installed inside the unit. The humidification system shall be an electrode cylinder type, complete with fill valve, drain valve, adjustable humidity output and automatic flush cycle activated on demand from the microprocessor microprocessor control system. 4.4

Coating

4.11 Smoke Detector

A discharge plenum box shall be provided for field installation on the top of the up-flow unit. The plenum box shall be 18 inches (457mm) high, insulated and painted to match the color of the indoor unit. The plenum box shall be fitted with double deflection grilles for room discharge of conditioned air. 4.3

Black Color Epoxy Powder Remote Condenser (DBRC)

The remoter condenser DBRC shall be epoxy powder coated oven baked black color paint in lieu of standard beige color.

A stainless steel condensate drain pan shall be provided for the evaporator/chilled water coil in lieu of standard galvanized and painted drain pan. 4.2

Hydrophilic or Copper Fin for Condenser Coil (DBRC) Condenser coils shall be provided with hydrophilic or copper fins in lieu of aluminium.

Chilled Water Control The water circuit shall include 3-way forged brass valve and modulating actuators. The microprocessor positions the valve in response to room condition. Cooling capacity shall be controlled by bypassing chilled water around the coil.

Insulflex Closed Cell Insulation All panels shall be single skin and lined with Insulflex Closed Celled insulation (in lieu of fiberglass insulation) with fire resistant of Class O (BS476 Part 6) and Class 1 (BS476 Part 7).

4.9 3.2

Double Skin Panels

Liquid Line Solenoid Valve (DX Systems only) A factory fitted liquid line solenoid valve shall be provided for each refrigeration circuit as an option.

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The refrigerant circuit(s) shall be provided with an Electronic Expansion Valve (EEV) for evaporator in lieu of standard Thermal Expansion Valve (TXV) to allow an efficient modulation control of refrigeration and consistent energy saving performances.

Corporate Head Office DUNHAM-BUSH HOLDING BHD (Formerly known as Dunham-Bush (Malaysia) Bhd) (129358-X)

Lot 5755-6, Kidamai Industrial Park, Bukit Angkat 43000 Kajang, Selangor Darul Ehsan, Malaysia. Tel: 603-8924 9000 Fax: 603-8739 5020 E-Mail: [email protected] [email protected] m.my 7001170303

www.dunham-bush.com

M a n u f a c t u r e r r e s e r v e s t h e r i g h t t o c h a n g e s p e c i f i c a t i o n s w i t h o u t p r i o r n o t i c e .

Dunham-Bush - DB Aire Installation Operation Manual

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