Cgah Chiller Iom

Installation Operation Maintenance CGAH Air Cooled Liquid Chillers SMM Configuration SMM Module for Scroll Units, H Generation

CGAH-SVX01A-EN

CGAH Air Cooled Liquid Chillers 3

Contents Foreword Warranty Acceptance of delivery General Refrigerant

Product nomenclature Installation

4 5

Unit nameplate Installation instructions Handling Water to evaporator connection Unit dimensions General unit characteristics Electrical connections Wiring diagram-Customer electric power supply

13

General start-up Preparation Starting up the unit Final checks Pressure drops

16

Operation Control and unit operation Weekly start up and week-end shutdown Start up and seasonal shutdown

17

Maintenance Maintenance instructions Troubleshooting guide Installation checklit Safety recommendations Maintenance contract Training

SMM Configuration Hardware Operation of the module

22 23

Function of the keys 0 and 1 Function of the keys keys ,,  and  How to reset the SMM ? Content of the meun A General information B Customer configuration C Events log and reset D Customer configuration (rest) E Information on pressures and refr igerant temperatures and optional temperatures

Explanation of the fault codes © American Standard Inc. 2001

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Contents

Please check that the unit has not in any

Foreword The aim of this document is to set out the rules for the installation, set-up. operation and maintenance of this type of Trane air cooled liquid chillers. The maintenance operations required to

way been damaged during transport, as soon as it arr ives on site. If damage is observed, or even on suspicion of damage: Carry out instructions for notification of damage in transpor t, and war n your Trane

insure that this machine operates reliabily

Agency.

throughout its full service life are not

Caution:

exhaustively described. Only the services of

Failure to conform to the above rules will

a qualified technician employed by a

result in loss of insurance coverage.

reputable service company can ensure that the machine operates durably and reliably.

General About this manual:

Warranty

"Caution" and "Warning" messages appear

Warranty is based on the general terms and

at the appropriate place throughout this

conditions of Societe Trane. The warranty is

manual. Your personal safety and the proper

void if the equipment is modified without the

operation of this machine require that you

written approval of Trane, if the operating

follow them carefully.

limits are exceeded or if the control system

Trane Taiwan assumes no liability for

or the electrical wiring is modified.

installation or servicing performed by

Damage due to misuse, lack of maintenance

unqualified personnel.

or failure to comply with the manufacturer’s instructions or recommendations is not covered by the warranty obligation.

Acceptance on delivery

Refrigerant The refrigerant provided by the constructor meets all the requirements of our units. When using recycled or reprocessed

All air-conditioning units are shipped to their

refrigerant, it is advisable to ensure its

installation site on a wooden skid.

quality is equivalent to that of a new

All machines reach final destination

refrigerant.

completely connected and assembled ready

For this, it is necessary to have a precise

for immediate start-up.

analysis made by a specialized laboratory. If this condition is not respected, the constructor warranty could be cancelled.

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Product nomenclature

CG A H 1,2

3

2

B U N M R N A

4 5,6,7 8

020

9 10 11 12 13 14 15

DIGIT 1,2,3,4 – Chiller Type CGAH=Air-cooled Chillers DIGIT 5,6,7 – Model 020 025 030 040 050 060

DIGIT 11 – Built In Water Pump N=Without (standard) R=With (Option for model 020 & 025 Cooling-Only 60Hz unit) DIGIT 12 – Main Disconnect Switch M=Without (Standard) G=With (Optional)

DIGIT 8 – Electrical Power 2=220V/60Hz/3ø 3=380V/60Hz/3ø 4=460V/60Hz/3ø 5=380V/50Hz/3ø 6=400V/50Hz/3ø 7=415V/50Hz/3ø DIGIT 9 – Design Sequence B=Second

DIGIT 13 – Operating Ambient Temperature R=Normal (standard 3-43˚C) L=Low (below 3˚C) DIGIT 14 – Options N=No options B=Blue fin condenser J=Compressor sound attenuator K=Blue fin condenser & Compressor sound attenuator DIGIT 15 – Service Sequence A=First

DIGIT 10 – Controls U=Microprocessor M=Pneumatic control (For domestic only)

© American Standard Inc. 2001

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Installation

Figure 1: Unit nameplate

Unit nameplate The unit nameplate gives the complete model reference numbers. The unit power rating is shown, and power supplies should not deviate by more than 10% from the rated power. The customer’s electrical installation must be able to withstand this current.(Figure 1)

Installation instructions Foundations No special foundations are required, provided the supporting surface is flat and level, and can withstand the weight of the unit. Anti-vibration rubber pads They are supplied as standard with the machine, and should be placed between the

Figure 2: Dimensions of recommended slings and swing-ber

supporting floor and the unit to attenuate vibrations. 4 pads for the sizes 020-030 6 pads for the sizes 040-060 Clearance Insure there is sufficient clearance around the unit to allow maintenance operations to take place without obstruction. For minimum clearance, please refer to figure 5.

Handling(Figure 2)

Dimensions of recommended slings and swing-bar: CGAH(50Hz)

020

025

030

040

050

060

A(mm)

1300 1300 1300 1300 2200 2200

B(mm)

2200 2200 2200 2200 2200 2200

MAX. WEIGHT(kg) 750

850

975 1450 1550 1750

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Water to evaporator connection Install water circulation pump upstream of the evaporator, insuring that the evaporator is under positive pressure. Tables for power supply connections and water return are shown on the certified submittals. These drawings are available on request from your Trane agency. The 1/4 coupling located on the outlet connections may be used as the draining outlet from the plate heat exchanger.

The following recommendations refer to

Caution:

Figure 3.

All installation must be equipped with

1. Pressure gauges: shows entering and

strainer provided by factory in order that

leaving water pressure. Stop valves

only clean water enters into exchangers.

should be provided on water inlets and outlets. 2. Thermometers: indicate chilled water entering and leaving temperatures. 3. Balancing valve: controls water flow. 4. Stop valves: isolate chillers and water

Insure that all chilled water pipes are fully insulated, in order to prevent frost damage. Mount heating resistors on all water pipes exposed to negative temperatures. Minimum water capacity

circuting pump during maintenance

Minimum volume of water is depending on

operations.

the type of application. Consult your Trane

5. Water strainer: avoid to get heat

Agency. If necessary a buffer tank should be

Note: Complete draining of all the

exchangers dirty. (Factory provided, field

fitted. Safety and control devices will only

installation is difficult. The use of anti-

installed)

operate correctly if there is sufficient water in

freeze liquid is recommended to protect

the system.

the heat exchanger. Water treatment Untreated or insufficiently treated water, if

Figure 3: Water to evaporator connection

used in this unit, may cause scale, slime or algae to accumulate or cause erosion and corrosion. The services of a qualified water treatment specialist are recommended to determine what treatment, if any, is advisable. Trane disclaims any liability with regard to damage arising from the use of untreated or improperly treated water, or from the use of saline or brackish water.


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Unit dimensions CGAH-020/025/030

CGAH-040/050/060

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General Unit Characteristics 50Hz Model Compressors Circuit Capacity Steps Max Load Amps(1)

380V 400V 415V

C0mpressors Power input C0mpressors Running Current

C0mpressors Starting Current(2)

380V 400V 415V 380V 400V 415V

Rated Water Flow Evaporator Head Loss(H2O) Refrigerant Number Of Fan(s) Air Flow Rate Nominal Fan Speed Fan Motor Full Load Power input Each Fan Motor Staring Amps Each Fan Motor Full Load Amps Each Operating Weight Lenght Width Height

400V 400V

A A A kW A A A A A A L.P.M. m Type kg EA m3 /s RPM kW A A kg mm mm mm

CGAH020 10T+10T 1 2 42 40 39 16.9 30 28 27 126 133 138 145 3.6

CGAH025 10T+15T 1 2 53 50 48 21.2 40 38 37 181 190 197 187 4.0

9.6 2 7.7 700 1.0 4.5 2.8 750 2060 1020 1560

12.2 2 7.7 700 1.0 4.5 2.8 850 2060 1020 1560

CGAH020 10T+10T 1 2 84 48 42 21.9 64 37 32 297 173 136 175 3.5

CGAH025 10T+15T 1 2 106 61 53 26.3 80 46 40 452 253 191 221 4.0

9.6 2 7.7 660 0.9 7.5 5.5 3.7 4.5 2.6 2.2 750 2060 1020 1560

12.2 2 7.2 660 0.9 7.5 5.5 3.7 4.5 2.6 2.2 900 2060 1020 1560

CGAH030 CGAH040 15T+15T 2x(10T+10T) 1 2 2 4 63 84 60 80 58 77 25.0 33.8 48 60 46 56 44 54 188 154 198 163 205 167 223 306 4.1 3.6 HCFC-22 14.5 20.1 2 4 7.2 15.4 700 700 1.0 1.0 4.5 4.5 2.8 2.8 975 1450 2060 2250 1020 1890 1560 1560

CGAH050 2x(10T+15T) 2 4 105 100 96 42.4 80 76 73 217 228 237 373 4.0

CGAH060 2x(15T+15T) 2 4 126 120 116 49.9 97 92 89 232 244 253 447 4.1

24.3 4 15.4 700 1.0 4.5 2.8 1550 2250 1890 1560

28.9 4 14.4 700 1.0 4.5 2.8 1750 2250 1890 1560

CGAH030 CGAH040 15T+15T 2x(10T+10T) 1 2 2 4 128 170 74 98 64 85 30.7 43.8 96 128 55 74 48 64 468 361 263 211 199 168 263 365 4.4 3.5 HCFC-22 14.5 20.1 2 4 7.5 15.4 660 660 0.9 0.9 7.5 7.5 5.5 5.5 3.7 3.7 4.5 4.5 2.6 2.6 2.2 2.2 1050 1450 2060 2250 1020 1890 1860 1560

CGAH050 2x(10T+15T) 2 4 212 122 106 52.5 160 92 80 532 300 231 443 4.0

CGAH060 2x(15T+15T) 2 4 256 148 128 61.4 192 111 96 564 318 247 526 4.4

24.3 4 14.4 660 0.9 7.5 5.5 3.7 4.5 2.6 2.2 1650 2250 1890 1560

28.9 4 15.0 660 0.9 7.5 5.5 3.7 4.5 2.6 2.2 1900 2250 1890 1860

60Hz Model Compressors Circuit Capacity Steps Max Load Amps(1)

220V 380V 440V

C0mpressors Power input C0mpressors Running Current

C0mpressors Starting Current(2)

220V 380V 440V 220V 380V 440V

Rated Water Flow Evaporator Head Loss(H2O) Refrigerant Number Of Fan(s) Air Flow Rate Nominal Fan Speed Fan Motor Full Load Power input Each Fan Motor Staring Amps Each

Fan Motor Full Load Amps Each Operating Weight Lenght Width Height

220V 380V 440V 220V 380V 440V

A A A kW A A A A A A L.P.M. m Type kg EA m3 /s RPM kW A A A A A A kg mm mm mm

Notes: (1)Maximun load amps to be used for sizing of cables, fuses and disconnect swith. (2)Staring amps with one compressor staring, the remaining compressor(s) running at full load.


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Performance Data 50Hz 25 MODEL CGAH020 (50Hz) CGAH025 (50Hz) CGAH030 (50Hz) CGAH040 (50Hz) CGAH050 (50Hz) CGAH060 (50Hz)

LWT (˚C) 5 7 9 5 7 9 5 7 9 5 7 9 5 7 9 5 7 9

Cap. kW(MBH) 53.7(183.3) 56.5(192.8) 59.3(202.4) 68.6(234.1) 72.2(246.4) 75.7(258.3) 82.1(280.2) 86.2(294.2) 90.3(308.1) 112.1(382.5) 118.0(402.7) 124.1(423.5) 137.2(468.2) 144.3(492.4) 151.3(516.3) 164.2(560.3) 172.4(588.3) 180.7(616.6)

30 In.P kW 15.2 15.4 15.7 19.1 19.4 19.6 22.3 22.6 22.8 29.4 29.7 30.1 38.3 38.8 39.3 44.5 45.1 45.7

Cap. kW(MBH) 51.1(174.4) 53.8(183.6) 56.5(192.8) 65.5(223.5) 68.9(235.1) 72.3(246.7) 78.5(267.9) 82.5(281.5) 86.4(294.8) 107.1(365.5) 112.9(385.3) 118.7(405.1) 131.1(447.4) 138.0(470.9) 144.7(493.8) 157.0(535.8) 164.9(562.7) 172.9(590.0)

Entering air temperature on condensing coil (˚C) 32 35 Cap. Cap. In.P In.P kW kW(MBH) kW kW(MBH) 16.8 50.2(171.3) 17.5 48.5(165.5) 17.0 52.7(179.8) 17.8 51.0(174.0) 17.3 55.4(189.1) 18.0 53.6(182.9) 21.0 64.3(219.4) 21.8 62.4(212.9) 21.3 67.6(230.7) 22.1 65.7(224.2) 21.6 71.0(242.3) 22.4 68.8(234.8) 24.4 77.0(262.8) 25.4 74.7(254.9) 24.7 80.9(276.1) 25.7 78.5(267.9) 25.1 84.8(289.4) 26.0 82.3(280.8) 32.2 105.2(359.0) 33.4 102.1(348.4) 32.6 110.9(378.4) 33.8 107.6(367.2) 33.0 116.6(397.9) 34.2 113.2(386.3) 42.0 128.7(439.2) 43.6 124.7(425.5) 42.6 135.3(461.7) 44.2 131.2(447.7) 43.1 142.0(484.6) 44.8 137.7(469.9) 48.8 153.9(525.2) 50.7 149.3(509.5) 49.5 161.8(552.1) 51.4 157.1(536.1) 50.1 169.7(579.1) 52.0 164.6(561.7)

In.P kW 18.6 18.9 19.2 23.1 23.4 23.7 26.8 27.2 27.5 35.4 35.8 36.2 46.2 46.8 47.4 53.7 54.4 55.1

40 Cap. kW(MBH) 45.7(156.0) 48.1(164.1) 50.5(172.3) 58.9(201.0) 62.0(211.6) 65.2(222.5) 70.6(240.9) 74.3(253.5) 77.9(265.8) 96.5(329.3) 101.9(347.7) 107.3(366.2) 117.8(402.0) 124.1(423.5) 130.4(445.0) 141.2(481.8) 148.6(507.1) 155.9(532.0)

In.P kW 20.7 21.0 21.3 25.5 25.8 26.1 29.5 29.9 30.3 38.9 39.4 39.9 51.0 51.6 52.2 59.1 59.8 60.6

Entering air temperature on condensing coil (˚C) 32 35 In.P Cap. In.P Cap. kW(MBH) kW(MBH) kW kW 21.3 60.5(206.5) 22.1 58.4(199.3) 21.6 63.5(216.7) 22.4 61.4(209.5) 22.0 66.4(226.6) 22.8 64.3(219.4) 25.2 76.3(260.4) 26.2 74.0(252.5) 25.6 80.2(273.7) 26.5 77.8(265.5) 25.9 84.0(286.6) 26.9 81.5(278.1) 29.3 90.8(309.9) 30.4 88.0(300.3) 95.2(324.9) 92.4(315.3) 29.7 30.8 30.1 99.8(340.6) 31.2 96.7(330.0) 43.6 125.5(428.3) 45.0 121.9(416.0) 44.2 132.3(451.5) 45.6 128.3(437.8) 44.7 138.9(474.0) 46.2 134.9(460.3) 50.4 152.7(521.1) 52.3 148.0(505.0) 51.2 160.5(547.7) 53.1 155.6(531.0) 51.9 168.1(573.6) 53.8 163.0(556.2) 58.6 181.5(619.4) 60.8 176.1(600.9) 59.4 190.5(650.1) 61.6 184.8(630.6) 60.2 199.3(680.1) 62.5 193.5(660.3)

In.P kW 23.4 23.7 24.1 27.7 28.1 28.4 32.1 32.6 33.0 47.3 47.9 48.5 55.3 56.1 56.9 64.2 65.1 66.0

40 Cap. kW(MBH) 55.0(187.7) 57.8(197.2) 60.0(206.8) 70.0(238.9) 73.6(251.2) 77.1(263.1) 83.4(284.6) 87.7(299.3) 91.8(313.3) 115.4(393.8) 121.6(415.0) 127.9(436.5) 140.0(477.7) 147.3(502.7) 154.4(526.9) 166.9(569.5) 175.2(597.9) 183.4(625.8)

In.P kW 25.7 26.1 26.5 30.3 30.8 31.2 35.2 35.7 36.2 51.4 52.0 52.7 60.7 61.6 62.4 70.5 71.4 72.4

60Hz 25 MODEL CGAH020 (60Hz) CGAH025 (60Hz) CGAH030 (60Hz) CGAH040 (60Hz) CGAH050 (60Hz) CGAH060 (60Hz)

LWT (˚C) 5 7 9 5 7 9 5 7 9 5 7 9 5 7 9 5 7 9

Cap. kW(MBH) 64.7(220.8) 68.0(232.0) 71.1(242.6) 81.5(278.1) 85.6(292.1) 89.6(305.8) 96.9(330.7) 101.6(346.7) 106.2(362.4) 134.0(457.3) 141.0(481.2) 148.1(505.4) 163.1(556.6) 171.2(584.2) 179.3(611.9) 193.7(661.0) 203.1(693.1) 212.5(725.2)

30 In.P kW 19.4 19.8 20.1 23.0 23.4 23.7 26.8 27.2 27.6 40.3 40.8 41.3 46.1 46.7 47.4 53.6 54.4 55.1

Cap. kW(MBH) 61.7(210.6) 64.8(221.1) 67.8(231.4) 77.9(265.8) 81.7(278.8) 85.6(292.1) 92.5(315.7) 97.1(331.4) 101.6(346.7) 128.1(437.1) 134.8(460.0) 141.6(483.2) 155.7(531.3) 163.6(558.3) 171.3(584.6) 185.0(631.3) 194.1(662.4) 203.0(692.7)

Notes: (1)Cap.-Cooling Capacity (2)In.P-Total Input Power

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Electrical connections

Typical wiring diagram(Wiring on actual unit need to refer to diagram attatched on control box)

1. The greatest care should be taken when cutting through passages and installing electric wiring. Under no circumstances should chips of metal or cuttings of copper or isolating material fall into the starter panel or electric components. Relays, contactors, terminals and control wiring should be covered and protected before power supplies are connected. 2. Install power supply cabling as shown in drawing. Adequate insulation should be chosen, ensuring no foreign bodies enter the electical housing or components. Caution: 1. Cabling must comply with standards in force. The type and location of fuses must also comply with standards. As a safety measure, fuses should be visibly installed, close to the unit. 2. Only copper wiring should be used.. Using aluminum wires can produce galvanic corrosion and possibly lead to superheat and failure of connection points.


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General Start-Up

Preparation

Starting-up the unit

Before starting up the system. carry out the

Before start up:

following checks and operations:

Carry out all operations on check list and

1. Before making any electrical connection,

follow the instructions below to ensure that

insure that the isolation resistance of all

the unit is correctly installed and ready to

power supply terminals to ground

operate. The installer must check all the

complies with standards and regulations in

following points before calling in the Trane

force. Check the isolation of. all electric

servicing Department to put the equipment

motors using a 500 V DC megohmeter

into service.

which meets manufacturer’s specifications.

1. Chilled water circuit ready to operate,

Caution: Do not start up a motor whose Insulation resistance is less than 2 meghoms. 2. Check that all electrical connections are clean and sound. 3. Switch on mains power supply switch. Caution: Phase imbalance should not be greater than 2%. The voltage supplied to motors should be within 10% of the rated voltage shown on the compressor nameplate. 4. Check that unit power supplies match

7.Check direction of rotation of fan is discharging upwards. To ensure compressor is rotating correctly. 8.On start up of each motor in the system, check the direction of rotation and operation of all the components they drive. 9. Check extent of pressure drops through evaporator, so that the value matches

filled with water, pressure test carried out

values shown on graphs A and B, page14. 10. Check that there is sufficient demand for cooling on the day of start-up (around

and purged. 2. Thermometers and pressure gauges installed in chilled water circuit. 3. Chilled water pump interconnected to

50% of nominal load). Caution: Excessive emulsion shows that

control panel.( refer to wiring diagram)

refrigerant is present into oil and the

4. Check that all electrical connections are

result will be that compressor is not

clean and sound. 5. Check that mains power supply switch is sound.

lubricated enough. Shut down motor and identify cause. Excess oil in compressor may have as

6. Check compressor oil level at rest. The

much an adverse effect as not enough

lever should reach at least halfway up

oil. Before adding oil, consult Trane

indicator located on housing. See Fig. 4

technician. Use only products

for correct level.

recommended by Trane.

rated input power. Warning:

5. Insure all water and refrigerant valves are in service positions.

Figure 4: Compressor oil level

The water circuit to the evaporator may

6. Reset all manually set control devices.

be under pressure. Please refer to

7. Insure that sensors are properly installed

appropriate instructions to bring down

in their bulbwells and submerged in heat

this pressure before opening up the

conducting product. Check fixing of

system before rinsing or filling

capillary tubes (check protection from

operations. Failure

vibration and from wear, and insure that

to comply with this instruction may

they are not damaged).

cause accidental injury to maintenance personnel. Caution: The compressors must operate in a single direction of rotation. If refrigerant high pressure remains stable in the 30 seconds after compressor start up, immediately shut down unit and check the direction of rotation

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Start up 1. Start-up unit pushing button "1" of control module. The green LED must be lighted. 2. After unit star t-up. leave in operation for at least 15 minutes. to insure pressures are stabilized. Then check: • Compressor and fan current consumption. • Suction pressure. • Discharge pressure. • Superheat. • Subcooling. • Pressure drops and temperatures of evaporator.

Low temperature operations (air intake to

Final check

condenser)

When the unit is operating correctly, a final

If the unit is set to operate at low air intake

check should be made for the following

temperature, follow procedure below to

points:

insure the chilled water circuit is properly

1. Check that unit is clean, and clear of any

protected.

debris, tools, ect..

Insure that all pipes are perfectly protected

2. All valves in operating position.

against freezing.

3. Close control and starter panel doors, and

Otherwise use antifreeze solution in chilled water circuit. If for any reason. the heating resistors in the chilled water circuit cannot be energized, the solution must be able to withstand any ice formation in the circuit. When using the antifreeze solution, manufacturer’s instructions for filling of the

Superheat

chilled water circuit, the degree of protection

Normal superheat is 6 ˚C to 8 ˚C. Excess

and test procedures must be strictly

refrigerant supplied to the evaporator

followed.

check panels fixation. 4. After 2 hours of operation, clean the water strainer. Caution: Unit operation is function of the air temperature. Any recycling of the air fed out by the fans will increase the air intake temperature over the condenser fins and can result in high pressure cut-out.. (See Figure 5.)

produces high suction pressure, and a low degree of superheat can draw the refrigerant back to the compressor. Insufficient superheat is corrected by adjusting the

Figure 5: Service and Maintenance Clearance

expansion valve reduction lever. If this produces no result, it shows that the expansion valve is no longer operating satisfactorily. The expansion valve must be replaced. Sub-cooling If the system is correctly filled, the subcooling value of the refrigerant valve on the liquid line should be 8 ˚C to 10 ˚C on a standard unit. Condenser fan motors All fans are fixed directly to the motor shaft. The operating sequence of fans is controlled by the SMM module.


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Figure A: Evaporator water pressure drop (mH 2O)-50Hz

Figure B: Evaporator water pressure drop (mH 2O)-60Hz

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Operation

Seasonal shutdown

Control System The control is throgh the SMM control module.

1. Push button "O" of the module. 2. If the water piping is not protected against freeze up, drain the evaporator by opening

Unit operations

the 1/4 connection on the water outlet

Start up unit pushing button "1" of the SMM

pipe.

control module. The unit will operate correctly when there is sufficient water flow at the evaporator. The compressors will start up if the evaporator water leaving temperature is above the SMM control module setpoint.

Seasonal start-up(requires qualified technician) 1. Ensure all the instructions in "Annual maintenance", in the "maintenance" chapter, have been complied with. 2. Fill up and purge chilled water circuits.

Weekly start up

3. Insure liquid line stop-valve is open.

Push button "1" of the module to allow chiller

4. Check the tightness of the refrigerant

operation.

circuit.

Week end shutdown

5. Start-up the chiller (see U nit operations)

If the unit needs to be shut down for a short

6. Check all interconnected devices operate

period of time, push button "O" of the module. If the unit is shut down for a longer

properly. 7. Check oil level and service pressures after

period, see under "Seasonal shutdown",

the system has been in operation for 15 to

below.

20 minutes, under full load. 8. Check that high and low pressures are correct.


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Maintenance

The following maintenance instructions are

Recommended oil

5. Check contactors.

part of maintenance operations required for

Please refer to specific Trane documentation

6. Check adjustment and operation of each

this equipment. A qualified technician is

on oil, available from your nearest Trane

needed for regular maintenance as part of a

agency.

regular maintenance as part of a regular maintenance contract. Carry out all operations as required by schedule. This will insure long unit service life and reduce the possibility of serious and costly breakdown. Keep service records up to date, showing weekly information on unit operations. These records can be of great help to maintenance personnel diagnostics. Similarly, if machine operator keeps a log of changes in unit operating conditions, problems can be identified and solutions found before more serious problems arise. Weekly maintenance 1. Check compressor oil level at rest. Oil

control device. 7. Check the tightness of the refrigerant circuit.

Note: Oils recommended by Trane have been exhaustively tested in Trane laboratories

8. Check insulation of motor windings. 9. Clean the water strainer.

to the specific requirements of Trane

Other interventions may be necessary,

compressors, and hence the user’s

depending on the age and service life of

requirements. Any use of oils not

unit.

meeting specifications recommended by Trane is the responsibility of the user only, who thereby is liable to loss warranty.

Note: It is important for unit to be regularly maintained by a qualified technician, at least once a year or every 2,000 hours of

Annual maintenance 1. Check chilled water circuit, valve, pipes,

operation. Contact Trane Service for information on maintenance contracts.

and clean filters if necessary. Analyze

A maintenance inspection by a qualified

water quality. Cleaning may be required, in

technician is also recommended after the

which case use professional assistance.

first 500 hours of operation from unit startup.

level should be halfway up sightglass

Caution:

located on the housing. (See Figure 4)

Chilled water circuit may be pressurized.

Caution:

Check instruction to reduce circuit

Switch off unit mains power supplies

damaging as not enough oil. Before

pressure before opening chilled water

before any intervention. Failure to follow

topping up, contact a qualified technician.

circuit. Failure to comply with this

this safety instruction can lead to

Use only Trane-recommended oils.

instruction may result in accident or

accident death of the maintenance

injury to maintenance personnel.

personnel and may also destroy

2. Excess oil in the compressor can be as

Caution: Excessive emulsion indicates presence

2. Clean corroded outer surfaces, and

of refrigerant in oil, resulting in poor

repaint.

lubrication of compressor. Stop motor

Check electrical panel seal door.

and check cause. 3. Inspect the entire system for undesirable effects, such as noisy compressor, loose access panels, leaks in pipes, or vibrating contactors. 4. Keep records of temperatures, pressures, dates and times, or other observations in log book.

3. Check the tightness of the chilled water circuit. Check circulating pump operation and associated devices.

equipment. Cleaning of condensers Clean the condenser coils with a brush or jet of water. Please spray water from inside the unit. If the batteries are too dirty. consult a cleaning professional.

Check percentage of anti-freeze in chilled

Caution:

water circuit, and top up as necessary.

Never steam clean condenser coils

4. Carry out all weekly maintenance

because the resulting increase in pressure could cause some refrigerant to

inspections.

be lost through the safety valve.

17

CGAH-SVX01A-EN

Troubleshooting guide These are simple diagnostic. If there is a breakdown, the Trane Service Agency should be contacted for confirmation and assistance.

A. The compressor will not start up Problems symptoms

Probable cause

Action recommended

Compressor terminals are live but motor

Motor burned out.

Replace compressor.

Contactor motor not operational

Coil burned out or broken contacts.

Repair or replace.

No current ahead of motor contactor.

a)Power cut

Check fuses and connection.

b)Mains power supply switched off.

See why system tripped.

dose not start.

If system is operational, switch on mains power supply. Current ahead of fuse, but not on

Fuse blown.

Check motor insulation. Replace fuse.

Low voltage reading on voltmeter.

Voltage too low.

Contact Power Supply Utility.

Starter coil not excited.

Regulation circuit open.

Locate regulation device which has tripped

contactor side.

out, and see why. See instructions concerning this device. Compressor does not run. Compressor

Compressor sticking (damaged or sticking

motor "groans".

components).

Replace compressor.

B. Compressor stops Problems symptoms

Probable cause

Action recommended

High pressure switch tripped.

Discharge pressure too high.

See instructions for "discharge pressure too high".

Over current thermal relay tripped

a) Voltage too low.

a) Contact Power Supply Utility.

b) Cooling demand too high, or condensing

b) See instruction "discharge pressure too

temperature too high.

high".

Motor temperature thermostat tripped.

Not enough cooling fluid.

Repair leak. Add refrigerant

Anti-freeze security tripped.

Water flow to evaporator too low

Check water flow rate, and pressure switch contact in water.


18

CGAH-SVX01A-EN

C. Compressor stops just after its start Problems symptoms

Probable cause

Action recommended

Suction pressure too low.

Filter drier clogged

Replace filter drier.

Filter drier iced up.

D. The compressor keeps running without stopping Problems symptoms

Probable cause

Action recommended

Temperature too high in areas requiring air-

Excess load on cooling system.

Check thermal insulation and air-tightness

conditioning. Chilled water temperature output too high.

of areas requiring air-conditioning. Excess cooling demande on system.

Check thermal insulation and air-tightness of areas requiring air-conditioning.

E. Loss of oil in compressor Problems symptoms

Probable cause

Action recommended

Oil level too low in indicator.

Not enought oil.

Add oil.

Gradual fall of oil level.

Filter drier clogged.

Replace filter drier.

Suction line too cold.

Liquid flows back to compressor.

Adjust superheat and check bulb fixing of

Compressor noisy.

the expansion valve.

F. Compressor noisy Problems symptoms

Probable cause

Action recommended

Compressor knocks.

Components broken in compressor

Change compressor.

suction duct abnormally cold.

a) Uneven liquid flow.

a) Check superheat setting and fixing or

b) Expansion valve locked in open position.

expansion valve bulb. b) Repair or replace.

G. Insufficient cooling capacity Problems symptoms

Probable cause

Action recommended

Thermostatic expansion valve "whistles".

Not enough refigerant.

Check refrigerant circuit tightness and add refrigerant.

Excess pressure drops through filter drier.

Drier filter colgged.

Replace.

Excessive superheat.

Superheat not properly adjusted.

Check adjustment of superheat and adjust thermostatic expansion valve.

Insufficient water flow.

Chilled water pipes obstructed.

19

Clean pipes and strainer.

CGAH-SVX01A-EN

H. Discharge pressure too high Problems symptoms

Probable cause

Action recommended

Condenser abnormally hot.

Presence of uncondensable liquids in

Purge uncondensable fluids and drain off

system, or excess of refrigerant.

excess refrigerant.

Overload on cooling system.

Reduce load on system.

Chilled water leaving temperature too high

Reduce water flow if necessary. Condenser air output too hot.

Reduced air flow. Air intake temperature

Clean coil. Check operation of fan motor.

higher than specified for unit.

I. Suction pressure too high Problems symptoms

Probable cause

Action recommended

Compressor operates continuously.

Excess cooling demand on evaporator.

Check system.

Suction duct abnormaly cold.

a) Expansion valve too far open.

a) Check for superheat and check that

Refrigerant flows back to compressor.

b) Expansion valve looked in open position.

expansion valve bule is secure. b) Replace.

J. Suction pressure too low Problems symptoms

Probable cause

Action recommended

Excessive pressure drop through filter

Filter drier clogged.

Replace the filter drier.

drier. Refrigerant does not flow through

Expansion valve bulb has lost its refrigerant.

Replace the bulb of the expansion valve.

Loss of power

Expansion valve obstructed.

Replace.

Superheat too low.

Excessive pressure drops though evaporator.

Check adjustment of superheat and adjust

thermostatic expansion valve.

thermostatic expansion valve.

K. Insufficient cooling capacity Problems symptoms

Probable cause

Action recommended

Low pressure drops through evaporator

Low water flow rate.

Check water flow rate. Check state of strainer check for obstruction in chilled water pipes. Check pressure switch contact in water.

Caution: The above is not a comprehensive analysis

so that they have the technical knowledge

of the Scroll compressor refigeration

to identify and bring defective operations

system. The aim is to give operators

to the notice of qualified technicians.

simpleinstruction on basic unit processes © American Standard Inc. 2001

20

CGAH-SVX01A-EN

Installation checklist CGAH Trane Air Cooled Liquid Chiller This list must be checked off by the installer to ensure correct installation before the unit starts up.

Unit acceptance

Electrical equipment

 Check for damage, if any, on

 Check direction of rotation of compressor

transportation.

and fan motors

 Check for equipment shipped against

 Check chilled water pump drive roation  Check installation and rating of mains

delivery slip.  Check lifting system

power switch/fuse  Check that electrical connections comply

Unit positioning  Remove packaging  Check position of unit  Check unit is level  Check clearance around condenser  Check clearance required for

maintenance access  Check position of rubber pads.

Chilled water circuit  Check presence of stainer ahead of

evaporator  Check the tightness of the water circuit  Check thermometer positioning

with specification  Check that electrical connections match

information on manufacturer’s identification plate.  Check electrical connections and

connections to mains power switch  Water pressure switch.

General  Check available cooling charge (50% of

rated installation load)  Check with other trades handling

installation works.

 Check manometer positioning  Check chilled water flow rate balancing

system  Check rinsing and filling of chilled water

pipes  Check pump operation and water flow.

21

CGAH-SVX01A-EN

Hardware

• When the jumper is in position 1, the

Figure 6: Base Module

auxiliary module is used to control the circuit 2. • When the jumper is in position 2, the auxiliary module is used to control the fans. • When the jumper is in position 3, the auxiliary module is used to control the leaving hot water temperature. • When the jumper is in position 4, the auxiliary module is used to allow to display the evaporator and condenser inlet water temperatures.

Figure 7: Auxiliary Module


22

CGAH-SVX01A-EN

Operation of the module

Function of keys 0 and 1

How to have access to the


The key 1 is used to allow the start of the

menu A?

menu B?

Press 1 time on the key 

Press twice on the key 

The following message appears


compressor. The key 0 is used to stop the chiller. When the operator press on key 0, the



following message appears: A operator stop

How to reset the SMM? Press 3 times on the key  the following message appears 

C



Press 1 time on the key  Press 1 time on the key  The following message appears

C 02

NO




CLEAR

Press 1 time on the key  during 5 seconds. The hour and the leaving chilled water temperatures are displayed. The orange LED is switched off. Notes If one of the following faults is displayed:

B



Chilled water set point is displayed.

The leaving chilled water temperature set

A01

Value ˚C

point value is displayed.

To change the value, press on the keys

 or 

To have access to the following information,

To have access to the following parameters,

press the key 

press on the key 

To exit the menu press the key  during a

To change the value of these parameters,

few seconds.

press on the keys  or 

Information contained in the menu A A01 Active water setpoint A02 Evaporator water outlet mix A03 Circuit 1 evaporator water outlet temperature A04 Circuit 2 evaporator water outlet temperature A05 Air temperature A06 Number of compressor A1 operating hours A07 Number of compressor A1 starts A08 Number of compressor B1 operating hours A09 Number of compressor B1 starts

M comp A2 fault

A10 Number of compressor A2 operating hours

M comp B2 fault

A11 Number of compressor A2 starts

the corresponding overload relays must be

A12 Number of compressor B2 operating

reset before to reset the SMM.




M comp A1 fault M comp B1 fault


temperature

Press on the key 

C 02

A

hours A13 Number of compressor B2 starts

To exit this menu, press the key

 during

a

few seconds. Parameters which can be modified in the menu B B01 Evaporator outlet temperature setpoint Setting -26.0˚C to 30.0˚C by 0.1˚C increment. Default value 6.0. B02 Hot water outlet temperature setpoint Setting 20.0˚C to 60.0˚C by 0.1˚C increment. Default value 45.0.

B03 Auxiliary water outlet temperature setpoint Setting -26.0˚C to 60.0˚C by 0.1˚C increment. Default value 6.0. B04 Circuit 1 ON validation Enabled circuit: Enable. Disabled circuit: Disable. Default value: Enable B05 Circuit 2 ON validation Enabled circuit: Enable. Disabled circuit: Disable. Default value: Enable B06 Operating mode Cooling mode: Cooling Heating mode: Heating Serial link control: Extern Default value: Cooling

23

CGAH-SVX01A-EN

B07 Remote control validation

D08 Heating reset range


Remote control: Remote

Setting -15˚C to 15˚C by 0.1˚C

menu D?

Local control: Local

increment. Default value 5.0.

Press 4 times on the key 

Default value: Local B08 Auxiliary setpoint validation Enabled circuit: Enable. Disabled circuit:

Example of programmation of the chilled


water temperature set point in function of 

D



the air temperature

Disable. Press 1 time on the key 

Default value: Disable

Expected operation


B09 Current date display B091 day-setting 1 to 31

D 01

B092 month-setting 1 to 12 B093 year-setting 00 to 99. B10 Current hour display B101 hour-setting 00 to 23 B102 Minutes-setting 00 to 59 B103 Seconds-setting 00 to 59.

Set point (˚C)

None

12

To change the value, press on the keys

 or 

To have access to the following parameters, press on the key 

7

To change the values of these parameters, press on the keys  or K To exit this menu, press on the key

20

30

Outside temp.(˚C)

Values to be programmed  during

Parameter

Value

B12 Set this parameter at 0,0˚C

a few seconds.

B01

12,0


Parameters which can be modified in the

D01

Air

menu D

D02

20,0

D01 Cooling setpoint reset type

D03

10,0

D04

-5,0



None: None-On air: Air-On water: Ret.

menu C ?

Wat.-Default value: None

Press 3 times on the key  The following message appears 

C



D03 Cooling reset value range Setting 2˚C to 20˚C by 0.1˚C increment.

The last fault is displayed.  to display

the last 20 faults Press successively on the key  to display the last fault. To exit this menu, press during a few seconds on the key . This menu is used also to reset the SMM(see parapragh How to reset the SMM?)

Setting 2˚C to 55˚C by 0.1˚C increment. Default value 20.0.

Press 1 time on the key  Press successively on the key

D02 Cooling reset starting value

Default value 10.0. D04 Cooling reset range Setting -15˚C to 15˚C by 0.1˚C increment. Default value 5.0. D05 Heating setpoint reset type None: None-On air: Air-On water: Ret. Wat.-Default value: None D06 Heating reset starting value Setting 2˚C to 55˚C by 0.1˚C increment. Default value 20.0. D07 Heating reset value range Setting 2˚C to 20˚C by 0.1˚C increment. Default value 10.0.


24

D09 Generic input type 0..10 Volts

0..10V

2..10 Volts

2..10V

0.20mA

0..20mA

4..20mA

4..20mA

Default value

0..10V

10V or 20 mA lead to a chilled water temperature set point reset of 20˚C. D10 Evaporator pump stop timer Setting 1 to 10 mn by 1 mn increment. Default value 1. D11 Evaporator water pump automatical cleaning None

None

6 hours

6H

12 hours

12H

24 hours

24H

48 hours

48H

Default value

None CGAH-SVX01A-EN

D12 compressor lead-lag

D14 Default 2 report type

Increasing fix

1-2

Decreasing fix

2-1

Unit or circuit 1

Start and hour balancing

Auto

manual reset default

Automatic inversion at each star

TRANE

Unit or circuit 2

Default value

TRANE

manual reset default

value

The parameters D13 and D14 are used

Unit or circuit 1

to determine the conditions under which

automatic reset default

the fault relays switch on.

Unit or circuit 2

D13 Default 1 report type

Displayed

automatic reset default

value

Circuit 1 not available

Unit or circuit 1 manual reset defaulbit

or in limit bit 0

1

or in limit bit 1

2

on unit bit 2

4

bit 3

8

bit 4

16

bit 5

32

bit 6

64

Default value

Unit or circuit 2 automatic reset default

or in limit

Default value

1

2

bit 2

4

menu E? Press 5 times on the key 



E



Press 1 time on the key  The saturated refrigerant temperature inside

bit 3

8

circuit 1 evaporator is displayed.

E01 bit 4

16

bit 5

32

bit 6

64

2

Value ˚C

To have access to the following information, press on the key  To exit this menu, press on the key

 during

a few seconds. information contained in the menu E E01 Circuit 1 evaporator saturated

relay 1 (D13) switches on if a manual or an automatic reset fault occur. i.e.in the cases corresponding to the dits 0, 1, 2 and 3. In this case, we have to display

Informational default on unit

bit 1

on a 2 circuit unit, we wish that the fault




Example:

Circuit 1 not available or in limit

1

Informational default

Unit or circuit 1 automatic reset default

bit 0


Unit or circuit 2 manual reset default

Displayed

the value 15 (1+2+4+8)

temperature E02 Circuit 1 evaporator saturated pressure E03 Circuit 1 condenser saturated temperature E04 Circuit 1 condenser saturated pressure E05 Circuit 2 evaporator saturated temperature

D15 Serial link address setting 0 to 62. Default value 0.

E06 Circuit 2 evaporator saturated pressure E07 Circuit 2 condenser saturated temperature

Use For comfort type application, increasing the

E08 Circuit 2 condenser saturated pressure

reset point when the air temperature

E09 Evaporator water inlet temperature

decreases allows to obtain better C.O.P. at

E10 Condenser water outlet temperature

part load, so to decrease the energy

E11 Condenser water inlet temperature

consumption.

25

CGAH-SVX01A-EN

Explanation of the fault codes

Displayed messages

Description

Action

I Service demand I E2P par.chg

Service request on the unit: one of the compressor configurated as presently has reached the value 1 When powering-up the module, one or more of the operating parameters in E2PROM was incorrect and

I XRAM par.chg

has been corrected (default value). Check the configuration. When powering-up the module, one or more of the operating parameters in XRAM was incorrect and has Check the configuration

I E2P par.prog.

been corrected (default value). Check the configuration. When powering-up the module, all the operating parameters in EPROM were incorrect and have beem

Check the configuration

A User ckt2 stop A Ext. ckt1 stop A Ext. ckt2 stop

replaced by their default value. Make the configuration. Circuit 1 is forced to stop due to the operator's configuration(menu B04) Circuit 2 is forced to stop due to the operator's configuration(menu B05) Circuit 1 is forced to stop due to an external cause, by the O/l input Auto/Stop 1. Circuit 2 is forced to stop due to an external cause, by the O/l input Auto/Stop 2.

For info only. No necessary action For info only. No necessary action For info only. No necessary action For info only. No necessary action

A Rem. ckt1 stop A Rem. ckt2 stop

Circuit 1 is forced to stop by the serial link. Circuit 2 is forced to stop by the serial link.

For info only. No necessary action For info only. No necessary action

A User unit stop

Unit is forced to stop due to the operator's configuration. On single circuit units, this message is displayed For info only. No necessary action if circuit 1 is devalidated (menu B04). On dual circuit this message is displayed if both circuits 1 and 2 are devalidated (menu B04 and menu B05) Unit is forced to stop due to an external causes. On single circuit units, this message is displayed if circuit For info only. No necessary action

A User ckt1 stop

A Ext. unit stop

Contact Trane Service Agency Check the configuration

1 is devalidated (O/I input Auto-Stop 1)On dual circuit units, this message is displayed if both circuits 1 A Rem. unit stop

and 2 are devalidated (O/l input Auto/Stop 1 and Auto/stop 2). Unit is forced to stop by the serial link. On single circuit units, this message is displayed if circuit 1 is devalidated by the serial link. On dual circuit units, this message is displayed if both circuits 1 and 2 are

For info only. No necessary action

devalidated by the serial link. A Operator stop I E2prom fault

The unit is stopped by the operator who has prshed key 0. A default occured when writing information in E2PROM.The value in memory may not be right and thus

For info only. No necessary action Switch off the SMM during 5 seconds

corrected at next powering-up. A Ckt1 limiting

A Ckt2 limiting

One of the compressors of circuit 1 is prevented to start because one of the limitation is active (evaporator 1 outlet water temperature below the evaporator outlet water temperature low setpoint, evaporator 1 refrigerant temperature below the refrigerant temperature low setpoint, evaporator outlet temperature too high). One of the compressors of circuit 2 is prevented to start because one of the limitation is active



(evaporator 2 outlet water temperature below the evaporator outlet water temperature low setpoint, evaporator 2 refrigerant temperature below the refrigerant temperature low setpoint, evaporator outlet

A Ckt1 HP limit.

water temperature too high). NB: this message can be displayed on 3 compressor units but without any influence on the operation of circuit 2. The condenser side refrigerant pressure on circuit 1 is too high, and the system reduces the number of

Check condenser cleaning and fan state.

A Ckt2 HP limit.

compressors in operation until its complete stop if necessary. The condenser side refrigerant pressure on circuit 2 is too high, and the system reduces the number of

Check condenser cleaning and fan state.

A Low ambience

compressors in operation until its complete stop if necessary. The outdoor air temperature is lower than the low ambient setpoint.


A Ckt1 defrost A Ckt2 defrost

Circuit 1 is de-icing and thus preventing the operation of circuit 2 (if present) Circuit 2 is de-icing and thus preventing the operation of circuit 1

For info only. No necessary action For info only. No necessary action

A EVP water flow

Loss of evaporator water flow during more than 2 sec. lf one of the compressor was operating, then the default LED is lit, if not, it is not lit.

Check chilled water pump state.

A Sensor 4 main

The customer analogical in put is configurated as 2..10V or 4..20 mA and the signal is lower than 1V or 2 Check configuration of parameter D09 and mA. analogic inlet.

A Sensor 1 I/O 2

Sensor 1 (air temperature) of module I/O 2 is out of range (short circuit  40˚C, or circuit open  80˚C).


26

Change the sensor.

CGAH-SVX01A-EN

Displayed messages

Description

Action

A Sensor 1 I/O 3

Sensor 1 (condenser water outlet temperature) of module I/O 3 is out of range (short circuit  40˚C, or circuit open  80˚C).

Change the sensor.

A Sensor 1 I/O 4

Sensor 1 (evaporator water inlet temperature) of module I/O 4 is out of range (short circuit  40˚C, or circuit open  80˚C).

Change the sensor.

A Sensor 1 main

Sensor 1 (evaporator 1 water outlet temperature) of the main module is out of range (short circuit  40˚C, or circuit open  80˚C).

Change the sensor.

A Sensor 2 main

Change the sensor.

A Sensor 1 I/O 1

Sensor 2 (evaporator 1 refrigerant saturated temperature) of the main module is out of range (short circuit  40˚C, or circuit open  80˚C). Sensor 3 (evaporator 1 refrigerant saturated temperature) of the main module is out of range (short circuit  40˚C, or circuit open  80˚C). Sensor 1 (evaporator 2 water outlet temperature) of module I/O 1 is out of range (short circuit  40˚C, or

A Sensor 2 I/O 1

circuit open  80˚C). Sensor 2 (evaporator 2 refrigerant saturated temperature) of module I/O 1 is out of range (short circuit 

A Sensor 3 main

A Sensor 3 I/O 1 A Com I/O 1

40˚C, or circuit open  80˚C). Sensor 3 (evaporator 2 refrigerant saturated temperature) of module I/O 1 is out of range (short circuit  40˚C, or circuit open  80˚C). The main module does not communicate anymore with module I/O 1. Check the link wiring with this

Change the sensor. Change the sensor. Change the sensor. Change the sensor. Check the link wiring

module as well as its address (circuit 2 board) A Com I/O 2 A Com I/O 3

The main module does not communicate anymore with module I/O 2. Check the link wiring with this module as well as its address (air-cooled unit board) The main module does not communicate anymore with module I/O 3. Check the link wiring with this

Check the link wiring Check the link wiring

module as well as its address (reversible unit board) A Com I/O 4

The main module does not communicate anymore with module I/O 4. Check the link wiring with this module as well as its address (option doard)

Check the link wiring

M Low ref.ckt1 M Low ref.ckt2

Evaporator 1 refrigerant saturated temperature has overtaken the refrigerant low remperature setpoint.

Check expansion valve state and refrigerant load

Evaporator 2 refrigerant saturated temperature has overtaken the refrigerant low remperature setpoint. Evaporator 1 water outlet temperature has overtaken the evaporator water low temperature setpoint. Evaporator 2 water outlet temperature has overtaken the evaporator water low temperature setpoint.

Check expansion valve state and refrigerant load

M Pressure ckt1 M Pressure ckt2 M Discharge ckt1

Circuit 1 has been put in consecutive stand-by too near: thus it is stopped. Circuit 2 has been put in consecutive stand-by too near: thus it is stopped.

Check condenser cleanliness Check condenser cleanliness

One of the circuit 1 compressors has operated during a too long period with a high discharge temperature: thus it is stopped.

Check refrigerant load

M Discharge ckt2

Check refrigerant load

M Comp. A1 fault

One of the circuit 2 compressors has operated during a too long period with a high discharge temperature: thus it is stopped. The compressor A1 default I/O input shows a default.

M Comp. B1 fault M Comp. A2 fault

The compressor B1 default I/O input shows a default. The compressor A2 default I/O input shows a default.

Reset the overload relay of compressor B1 Reset the overload relay of compressor A2

M Comp. B2 fault M ckt1 fault

The compressor B1 default I/O input shows a default. The compressor A1 and B1 default I/O inputs simultaneously show a default.

Reset the overload relay of compressor B2 Reset pressostat HP, circuit 1

M ckt2 fault M Unit fault

The compressor A2 ( and B2 if present) default I/O inputs simultaneously show a default. All the present compressor default I/O inputs simultaneouslyshow a default.

Reset pressostat HP, circuit 2 Reset pressostats and thermal relays

M Low water ckt1 M Low water ckt2

Check chilled water flow Check chilled water flow

Reset the overload relay of compressor A1

Note

The first letter of the displayed message indicates the type of default I for information A automatic reset default 



M manual reset defauit 

27

CGAH-SVX01A-EN

FM 38631 ISO 9002 Qualified factory 

Literature Order Number North American Group The Trane Company 3600 Pammel Creek Road La Crosse, Wl 54601-7599

CGAH-IOM-2

File Number

CGAH-SVX01A-EN-0200

Supersedes

CGAH-IOM-1

Stocking location

Taipei Taiwan

http : // www.trane.com

Since The Trane Company has a policy of continuous product improvement, it reserves the right to change design and An American-Standard Company

specifications without notice.

Cgah Chiller Iom

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