A Brief Introduction to HASS

A Brief Introduction to HASS 1 OVERVIEW HASS is a software which employees use to analyze re sprinkler systems. It can be utilized to perform hydraulic calculations on designs done both internally and externally. Hydraulic calculations are performed in order to calculate the ow and pressure throughout the re sprinkler system. !hese need to be done in order to "erify that the design works and meets the applicable code standards. standards. !hese calculations are not typically done throughout the entire sprinkler system# but only in the denoted $remote area%. !his is where the most demand is needed# which means it is the hardest to obtain the re&uired pressure pressure and ow. ow. !he code minimum pressure re&uired at the $remote% sprinkler is TYPICALLY  '  ' psig (depends on sprinkler type). *ressure loss is usually due to friction caused by the lengthy distance from the re standpipe as well as any tee+s# elbows# other xtures and ele"ation changes in the piping. ,onsult a member of the plumbing group if you ha"e any further &uestions.

2 INSTALLATION  !he HASS software software can can be found in the *lumbing -roup folder folder.. A link to the folder folder is pro"ided as follows /0*lumb0Hass0Has /0*lumb0Hass0Hass s 1.2 ,onsult a member of the plumbing group to determine the correct "ersion to install as newer "ersions become a"ailable.

3 STARTING UP HASS After installation is complete# double3click the HASS icon (the dalmatian dog ) to begin use. 4hen HASS is opened# you will see a dialog box similar to the one shown below. Select $5o% to continue to the main screen.

 6ou will then be directed to a blank screen with a number of shortcuts located on the top ribbon. 6ou will become more familiar with these as you become more experienced with the software.

4 PERFORMING H YDRAULIC CALCULATIONS 4.1 PROPERLY  CREATING AND SAVING SPRINKLER  DATA FILE  !o begin your hydraulic calculation# click on the leftmost shortcut# it will display $5ew% if you ho"er the mouse o"er it# on the top ribbon or go to $7ile% %5ew%. !he next dialog box# shown below# will prompt you to name the le you are creating and select an area to sa"e the le. Hydraulic calculations are usually sa"ed within the pro8ects $Internal *ro8ect% %,alculations%%7ire% folder. !he le should be sa"ed as a $Sprinkler 9ata(:.S97)% le.

4hen the le is sa"ed in the proper folder# a co"er sheet will appear. ,lick $/;
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Before you can input the data# you must rst label your nodes so that you can determine your route between nodes# pipe lengths and diameters# ele"ations and the number of xtures. 4e will discuss common techni&ues for labeling nodes in the next section.

4.2 LABELING NODES  !here is no one single way to label nodes as e"eryone has their own techni&ue from starting at the source or at the remote sprinkler to how many nodes to use. 4e will discuss a few common methods that is used by most of the plumbing group# but you will e"entually de"elop a methodology that is easiest for you and makes the most sense. Shown below you can see an example of a oor plan with the nodes labeled. !he node markers are typically done in =e"it and the ,A9 manager of the pro8ect will create node tags specically for the pro8ect# so they may be di>erent than a pre"ious pro8ect you ha"e worked on. 6ou can clearly see the $remote area% labeled in the bolded dotted line in the image below. !here are nodes placed towards the top left of the image# these are the nodes from the re standpipe# $S/?=,@% in HASS. You must always place nodes at the source AND on all the sprinklers within the remote area AND back so as to complete a full loop.

In the image below# you will see a closer "iew of the $remote area%. !hese nodes were labeled beginning with the remote sprinkler head# S# while mo"ing towards the source. /ne thing that should become a habit is labeling sprinkler heads as the node number followed by an $S%. !he $S% denotes that it is the node for the sprinkler head# otherwise referred to as a $owing node%# as this is where water is

discharged. !his will assist you in inputting the data in HASS as sprinkler nodes need a ;3factor (we will discuss later) whereas other nodes do not.  A eneral rule of thumb is to place nodes where the !ow of water will separate.  !his can be seen as you go from node S to node . !he water can either continue upwards into the other branch /= turn left# that is why node  is placed there. 6ou may be wondering why some sprinkler heads ha"e two nodes# one with the $S% and one without# while others only ha"e the $S% notation. If you look at nodes C and CS# you can see that the water can either ow upwards into the sprinkler head or continue mo"ing along the branch through a tee at node C. !hus# the ow of water does in fact split therefore you need to place two nodes. Sprinkler heads at the end of branches# i.e. nodes S and DS# do not ha"e a second node as the ow of water can only go upwards to the sprinkler head. A node may be placed here as well# but it is unnecessary and would 8ust clutter your node map and possibly confuse you.  Another "ery important thin to pay attention to is that you do not double count #$tures% which typically include tee&s and elbows. A common rule of thumb is to either count the xture at the starting or ending node of your run. 7or example# if you are inputting data from node S  you would only put an elbow xture that raises the sprinkler head and not the tee at node . !hen# when you go from node E you would include only the tee xture at node  and not node E.  !his can be done at your own disgression as long as the all of the xtures are accounted for.

5odes are needed at the source as well to complete the calculations. !his can be seen in the image below as $A% refers to the re standpipe. 5odes $B%# $,% and $9% are intermediate nodes that are located between the remote area nodes and the source nodes. !hese are needed due to limitations within the HASS software that we will discuss in the next section.

4.3 INPUTTING DATA 5ow you may begin inputting your data to HASS. A sample of how the data should be added can be seen in the image below. '(IC) TIP* +,- key allows you to add entries /uickly. 4e will outline the procedure in a few simple steps. . !he nodes are added in the $5ode 9ata @ntry% section to the left. 6ou enter all the nodes you pre"iously created on the oor plan and include their ele"ations. As we mentioned earlier# sprinkler nodes or $owing nodes% get a ;37actor of D.FG while all other nodes ha"e a "alue of G. This is AL0AY1 the case. If you need to $turn o>% or remo"e a sprinkler node# simply change the ;37actor "alue to G. Although not shown in the image# make sure to put an ele"ation on the source (denoted as $S/?=,@% in HASS) in the node data entry as well as in the $Source !ag% located abo"e the node data entry. . 6our routing data is added on the right hand side under $*ipe 9ata @ntry%.  6ou begin by inputting the $pipe tag%. 6ou can lea"e this as the default numbering (##E) or you can gi"e it a specic name which is recommended. !his is recommended because there will be two or more routes that split from the same starting node. !hus if you were to encounter an error at the starting node# you would not as easily recognize which route contains the error. !his method allows you to &uickly nd the route of interest without looking at starting and ending nodes. !his can be seen in the image below as there is a E and EA pipe tag. !he starting nodes are the same but the ending nodes of these routes are di>erent. E. 6ou will then add the starting and ending nodes. !his is the route which you are following on the re sprinkler layout. 2. $ength% is simply the distance between the starting and ending nodes. !his length can be determined using =e"it# Adobe Acrobat# Bluebeam or any other appro"ed software. It is important to include any ele"ation chanes between nodes in the total lenth of the run as 2A11 does not +assume the ele"ation chanes when the nodes are added in 1tep 3. D. 7ittings refer to the xtures such as tee+s# elbows or "al"es. !ypical xtures are as follows $@% refers to elbows# $!% refers to tee+s# $-% refers to a gate "al"e# $B% refers to a buttery "al"e and $,% refers to a check "al"e. It is important to input these accurately as each xture has a specic xture unit

which a>ects the pressure loss through it due to friction. 2A11 only allows up to 4 #ttins to be added% which is another reason why intermediate nodes are needed on lon runs. A ,low Control  Assembly 5,CA6 is comprised of se"eral #ttins. Input the #$tures of  the ,CA accordin to the detail drawin. If unsure% contact a senior enineer or pro7ect manaer. F. !he $9iameter% is inputted as the diameter of the piping between the start and end node. !his must be carefully added as the diameter of the piping changes between branches and mains. '. $H4,% refers to the Hazen34illiams ,oeJcient. !his is needed for the HASS software to accurately calculate the pressure and ow. This is always inputted as a "alue of +3-8. It is important to note that HASS is not particular if you input your node and pipe data in numerical order. It can be added in any order and will still run as long as you begin and end at the same position. After you ha"e inputted all of you data# you can run the calculation.

4.4 RUNNING THE CALCULATION  !he calculation is run by clicking the $,A,% button on the top ribbon. !his is shown in the image below if you cannot nd it. A dialog log box will appear titled $@dit ,alculation ,riteria%. ea"e all entries as defaulted and click $/;%. These entries are set durin the installation process.

Another dialog box will appear asking you to $@dit 7irst @nd3Head Kalue%. As we mentioned earlier# the minimum pressure re&uired at the most remote head is ' psig. 99The : psi is for a standard sprinkler head% other sprinkler heads may ha"e a di;erent pressure re/uirement. Con#rm this "alue with a senior enineer or your pro7ect manaer99.  !his "alue will then be inputted in the dialog box# as shown in the image below. /nce that is completed# click $/;% and the simulation will begin. At the end of the simulation a report will be printed and it can be determined whether the re sprinkler system will perform according to code or whether ad8ustments need to be made.

'(IC) TIP1 4hen there is one head abo"e and one head below an obstruction# only place a node for one of the sprinklers and not both. !his is because if a re were to occur# the heat would either be collected under the obstruction which would acti"ate the sprinkler below <= the heat would rise to acti"ate the sprinkler abo"e the obstruction. !hus# only one sprinkler head is acti"ated and the oor is still protected.

THINGS TO WRITE ABOUT

) Show sample node labeling ) ?sually only put nodes where ow separates because elbows can be accounted for E) /nly counts up to C elbows or tees 2) 9/5+! 9/?B@ ,/?5! 7IL!?=@S D) @!,B for ow control assembly F) Add H@*7? !I*S S@,!I/5 and talk about how only put one node for sprinklers abo"e and below obstruction because one /= the other will go o>