10.3.Re-air Purging
(Re-installation)
(Indoor unit)
(Liquid side)
(Outdoor unit)
2-way
valve
(Gas side)
Open
3-way
valve
Open
Low
High
Open
Closed
Vacuum Pump
Be sure to connect the end of the charging hose with the
push pin to the service port.
2.
3.
4.
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.
Connect the centre hose of
the
charging
set
to a
vacuum pump.
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.
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.
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
using a hexagonal wrench
(4 mm).
9.Mount valve caps onto both the valves.
"open"
5.
Disconnect the charging hose from the vacuum pump
38
Caution
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.
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 ).
2
BE SURE TO USE REFRIGERANT RECLAIMING
EQUIPMENT
WHILE
DISCHARGING
THE
REFRIGERANT.
Purge the air from charge set’s centre hose.
Be sure to check for gas leakage.
CS-PC9DKV / CU-
/ CS-
/ CU-
PC9DKV
PC12DKV
PC12DKV
