Tadano TT-800XXL1, Service Manual

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K-2 K-2
Air Conditioner
22
W701-0160E
9. Important points for assembly
(Layout)
9.1 Evacuation
[NOTICE]
If moisture and air are not fully eliminated from the
cycle, they will cause problems such as cooling
trouble and clogs in the cycle.
1. Evacuate by applying vacuum to the high- and
low-pressure service valves. Continue applying
vacuum for at least 10 minutes after the pressure
reaches 101 kPa (14.6 psi).
2. Airleakage check
After evacuation is completed, leave for 5 minutes
or longer, and then check that there are no
abnormal gauge readings (pressure increases).
9.2 Charging with refrigerant
[NOTICE]
Never inject liquid refrigerant from the low-pressure
side, regardless of whether the cycle is operating or
not. This will harm the compressor.
1. Injecting liquid
Be sure to inject from the high-pressure side,
without operating the cycle.
(1100 g or 2.42 lb)
2. Injecting gas (additional charge)
Inject gas from the low-pressure side while
operating the cycle.
Never inject refrigerant from the high-pressure
side while the cycle is operating. This is
extremely dangerous; the refrigerant will flow in
reverse, and the gas can or hose may rupture.
CAUTION