Amcor AOM 183HX - Manual (Page 20)

Air Purging
Air andmoistureremaining in theref rigerant system have undesrable efTects asindicatedbelow.
•Pressur e inth esyste m rises.
•Ope ratingcurren t rises.
•Cooling(o rheating )efficienc ydrop s.
•Moisture inth eref rigerantcircui t mayfree zean d biockcapiiia rytubing.
•Water mayiea d tocorrosio n ofpa rts inth eref rigerationsystem.
Therefore,th eindoo runi t andtubin gbet weenth eindoo ran doutdoo r unit must beiea ideste dan d evacuated
torem ove anynoncondensa biesan dmoistur efro mth esystem.
AirpurgingWith N^cuumPump
Preparation
•Che ck that each tubing(both iiquid and gas side
tubes)bet weenth eindoo ran doutdoo runit s have
beenprope riyconnecte d andai iwi ring forth etest
run has been compieted. Remove the service
vaivecap sfro mbot hth ega san dth eiiqui dside
onth eoutdoo runit .Not etha tbot hth eiiqui dand
thega ssid ese rvice vaives onth eoutdoo runi tare
keptciose d atthi sstag e.
Leakiest
•Connect the manifoid vaive(wilh pressure
gauges) and dry nitrogen gas cyiinder to this
servicepo rtwit hcharg ehose s.
Besur e tous e amani foid vaive forair
purging, if it isno t avaiiabie,us e astop
vaive forthi spu rpose.Th e"Hi "kno bof
themani foid vaive mustai ways be kept
ciose.
Toavodnitrogeen teingtherefigerartsysten in
ai iqud staè,thetop ofthecylindemust beh ighe
th aii ts bo ttoiw h 31 youp ressdzet he sy ste m
Usu^thecyiindeis us si in averticástandig
position
• Do aiea k test ofai ijoints ofth etubing(bothindoor
andoutdoor)an dbothgasan diiquidsid e service
vaives.
Bubbies indicate aieak. Besure towipeoffth esoap
with aciea ncioth.
•Afte rth esyste m is found to be free of ieate,reii eve
the nitrogenpressure byiooseningth echarg ehose
connecter atth enitrogen cyiinder.Whenth esystem
pressure isreduced tono rmai,disconnectth ehose
fromth ecyiinder.
Indoor unit
•Pressurizeth esystem to nomore than150 P.S.i.G
with dry nitrogen gas and ciose the cyiinder vaive
whenth e gaugereadingreached 150 P.S.i.G. Next;
test fiorieakswithiiquidsoa p.