
ENG
30
Vacuum pumping
Use vacuum pump
1
. Remove the valve caps on the liquid
valve and gas valve and the nut of refri-
gerant charging vent.
2.
Connect the charging hose of piezo-
meter to the refrigerant charging vent
of gas valve and then connect the other
charging hose to the vacuum pump.
3.
Open the piezometer completely and
operate for 10-15min to check if the
pressure of piezometer remains in
-0.1MPa.
4.
Close the vacuum pump and maintain
this status for 1-2min to check if the pres-
sure of piezometer remains in -0.1MPa.
If the pressure decreases, there may be
leakage.
1.
With leakage detector:
Check if there is leakage with leakage detector.
2.
With soap water:
If leakage detector is not available, please use soap water for leakage detection. Apply soap
water at the suspected position and keep the soap water for more than 3min. If there are air
bubbles coming out of this position, there’s a leakage.
Lo
Hi
piezometer
valve cap
liquid valve
gas valve
refrigerant
charging
vent
vacuum pump
inner hexagon
spanner
close
open
5.
Remove the piezometer, open the valve core of liquid valve
and gas valve completely with inner hexagon spanner.
6.
Tighten the screw caps of valves and refrigerant charging vent.
7.
Reinstall the handle.
Leakage detection
Содержание IGZC09NI/O-1
Страница 2: ...ENG ENG ...
Страница 38: ...SV 36 ...
Страница 74: ...DAN 72 ...
Страница 110: ...FIN 108 ...
Страница 146: ...POL 144 ...
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