SystemAir KA HSI-2-2-S-R-50F-TB2-L2 - Page 21

systemair 21
Connection of piping to hydraulic cyrcle
Toconnecttheunittothehydrauliccircuit,applythreadedjoints(ttings)orangedjointsforanominalpressureof16
bar, depending on the piping size.
For outdoor units with empty chamber, install the hydraulic circuit in the empty chamber next to heating or cooling coil .
Observe the chapter above for pipe installation through the panels.
Make sure to connect the piping installations properly and observe the following:
• Heattransfermediumandairmustmoveinacounterowconguration.
• The pipes of the heating or cooling system and the connections of the direct evaporator must not impede
the extraction of droplet eliminator as well as the antifreeze protection frame from unit, if it is installed in the
immediate vicinity.
• When tightening piping connections, apply counter-force by means of an appropriate tool (a pipe wrench with pads)
to avoid damaging the heat exchanger tubing system.
• Connecttheheatexchangerbymeansofadismountablethreadedjointorapairofanges.Donotapplywelding
joints.
• Connect the heat exchanger two piping connections to the hydraulic circuit so as to ensure the air and heat transfer
mediumcounterow.Theairinletintotheheatexchangershouldbeclosertothereturnpipe–inthecaseofboth
horizontalairowandverticalairow.
• Thepumpmaybemountedineitherthehorizontalorintheverticalsectionofthepiping;however,thepumpaxis
must always be horizontal.
• Thecontrolvalvemaybeinstalledinthesupplypipeorreturnpipe;however,thedistancebetweenthesupplypipe
and the return pipe and the distance between the control valve and the bypass pipeshould preferably not be less
than 500 mm.
• Upstream from the heat exchanger supply pipe end, install a dirt trap to protect the control valve and the circulation
pump.
• Downstream from the connection shut-off valve, as well as at the heat exchanger inlet and outlet, install
temperature sensors.
• At the lowest point of the piping installation, install a heat transfer medium draining valve to facilitate heat
exchanger draining.
• Atthehighestpointofthepipingsystem,makeprovisionsforventing,toensureanunobstructedowofthe
transfermediumthroughtheheatexchanger(asarule,theheatexchangersarefactory-ttedwithventing/
draining valve at the highest / lowest point of the collector or distribution pipe).
• Cleananylingdebrisandotherdirtfromthepipingsystem
Caution
Improperconnectionofhydrauliccyrclecanresultinlowerheatexchangerefciency.
The direction of the connections is mostly tied
inthecounterowdirectionwithrespecttothe
direction of the air.
Thegurebelowshowstheconnections
according to the medium:
1 – Water (heating and cooling)
2 – Freon (heating, cooling or combination)
3 – Steam (heating)
Inlet
Outlet