32
CONNECTING REFRIGERANT PIPING LINES (Cont.)
15-12 AIR AND MOISTURE PURGE
In some countries the law does not permit purging by blowing refrigerant through the lines.
If this is the case, please refer to page (31) using the vacuum pump.
(A) AIR PURGE USING REFRIGERANT
IN THE UNIT OUTDOOR UNIT
Air and moisture in the refrigerant
system have undesirable effects.
They must be purged completely.
The outdoor unit includes an extra
50 grams of refrigerant for air purge.
•
Air purging procedure
(1)
(2)
Remove the valve caps of
suction & liquid valve.
Loosen the valve stem of liquid
valve by 90 degrees (1/4 turn) for 5
seconds with a hex key wrench
Push the valve core of the
suction valve.
Stop pushing the valve core as
soon as the refrigerant hissing
stops.
Open the liquid valve for about 3
seconds, then close quickly to check
for gas leaks.
After checking for gas leaks, open the
liquid and suction valve all the way.
Reinstall the caps and of the
liquid valve, suction valve
and service port nut.
(5)
(4)
(3)
COMPLETE
(1)
Remove service port nut
of suction valve.
OPEN
OPEN & CLOSE
CLOSE
PUSH
OPEN
OPEN
(1) Suction flare valve.
(2) Suction service valve.
(3) Suction port to open & close.
(4) Cap for suction service valve.
(5) Cap for suction port.
(6) Liquid flare valve.
(7) Liquid service valve.
(8) Liquid port to open & close.
(9) Cap for liquid service valve.
(10) Cap for liquid port.
7 & 9
4
5
2
3
1
8
6
10
Summary of Contents for 42QG18-C
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