KA IMO 2021 6 V2.1

50 systemair
Caution
Connectionofthecoolingsystemandllingwithcoolantmayonlybecarriedoutbyaqualied
professional.
Connection should be made with copper pipes, which should be cleaned, dried and blown with dry
nitrogen and plugged at both ends.
Whenselectingthecombination,makesuretoproperlymatchthecompressorandtheDXsectionwith
other cooling circuit elements.
When installing, pay attention to the following:
• the maximum allowable distance between the DX section and the remaining part of the cooling circuit is 25 m,
• discharge pipes should be laid along the shortest route with the minimum practicable number of elbows (elbow
radius R > 3.5 d - pipe diameter).
Check before Commissioning
• The implementation of the electrical connections in accordance with the electrical wiring design document,
• the condensate discharge line,
• the tightness of the soldered joints,
• that the pressure testing and drying of the Freon lines has been successfully completed, as well as their connection
totheair-cooledcondenserandllingwithcoolant,
• the setup of the cooling system protection elements, such as the high-pressure/low-pressure protection switch,
accordingtothespeciedlevels.Thisalsoappliestothecondensationpressurecontrolswitch.
• the correct volume of Freon (no droplets in the inspection glass),
• thedryconditionoftheunit(theinspectionglass–colourindicator;dry–wet,inaccordancewiththe
manufacturer’s instructions),
• the correct evaporation and condensation pressure.
Uponcommissioning,makesurethattheelectricheaterinthesumpsufcientlyheatstheFreontoevaporateanyliquid
fractionofFreon(eitherbykeepingtheheateronpermanentlyevenwiththeunitshutdownorbyturningitonin
advance before the unit commissioning).
Medium lling
• Priortollingthesystem,extracttheairfromit.Keepdoingthisuntilthepipingsystemisdryandanadequate
vacuumisachieved(see:llingofcoolingsystems).
• Thesystemisusuallylledthroughthesuctionconnectiononthecompressor–largercompressorsarettedwith
aspecialconnection.UponreleasingFreonfromthecylinderintothesystem,startthecompressorandkeeplling
untilthespeciedevaporationpressureisreachedandnomorebubblesareseenintheinspectionglass.
1 Splitting module
2 TXV
3 Temperature sensor
4 Capillary TXV
5 Pressure leveling line
6 Humidity indicator
7 mMagnetic valve
8 Drying cartridge
9 Rotolockvalve
10 Collecting chamber