Re-Air Purging - Panasonic CU-PC12DKD Service Manual

CS-PC12DKD / CU-PC12DKD / CS-PA12DKD / CU-PA12DKD

10.3.Re-air Purging

(Re-installation)
(Indoor unit)
Vacuum Pump
1.Connect a charging hose with a push pin to the Low
side of a charging set and the service port of a 3-way
valves.
Be sure to connect the end of the charging hose with the
push pin to the service port.
2. Connect the centre hose of the charging set to a
vacuum pump.
3. Turn on the power switch of the vacuum pump and
make sure that the needle in the gauge moves from 0
cmHg (0 Mpa) to -76 cmHg (-0.1 Mpa). Then evacuate
the air for approximately 10 minutes.
4. Close the valve of the Low side of the charging set
and turn off the vacuum pump. Make sure that the
needle in the gauge does not move after approximately
5 minutes.
BE SURE TO TAKE THIS PROCEDURE IN ORDER TO
AVOID GAS REFRIGERANT LEAKAGE.
5.Disconnect the charging hose from the vacuum pump
6.Charge the pipes and indoor unit with gas refrigerant
from 3-way valve service port, and then discharge the
refrigerant until low side ( gas side ) gauge needle
indicates 0.3 Mpa (3 kg/cm ).
(Liquid side)
(Gas side)
Open
Low High
2
2-way
valve
3-way
valve
Closed
7.Tighten the service port caps of both the 3-way valve
and the 2-way valve at a torque of 18 N.m with a
torque wrench.
8.Remove the valve caps of both the valves. Position
both of the valves to
(4 mm).
9.Mount valve caps onto both the valves.
BE SURE TO USE REFRIGERANT RECLAIMING
EQUIPMENT
REFRIGERANT.
Purge the air from charge set's centre hose.
Be sure to check for gas leakage.
If gauge needle does not move from 0 cmHg(0 Mpa) to -76cmHg
(-0.1MPa) in step (3) above, take the following measures:
If the leaks stop when the piping connections are tightened
further, continue working from step (3).
If the leaks do not stop when the connections are retightened,
repair the location of the leak.
44
(Outdoor unit)
Open
Open
"open" using a hexagonal wrench
WHILE DISCHARGING
Caution
THE