Gas Charging - Panasonic CS-C73KE Service Manual

6 Gas charging

(After Evacuation)
(Indoor unit)
Check valve
Charging
cylinder
OPEN
Procedure:
(1) Connect the charge hose to the charging cyl-
inder.
Connect the charge hose which you disconnected from
the vacuum pump to the valve at the bottom of the
cylinder.
(2) Purge the air from the charge hose.
Open the valve at the bottom of the cylinder and press the
check valve on the charge set to purge the air (be careful
of the liquid refrigerant).
(3) Open the valve (Low side) on the charge set and
charge the system with liquid refrigerant.
If the system cannot be charged with the specified
amount of refrigerant, it can be charged with a little at
a time (approximately 150 g each time) while operating
the air conditioner in the cooling cycle; however, one
time is not sufficient, wait approximately 1 minute and
then repeat the procedure. (pumping down-pin)
(Liquid side)
(Gas side)
Lo Hi
CLOSE
2-way valve
Open
3-way valve
Open
This is different from previous procedures. Because
you are charging with liquid refrigerant from the gas
side, absolutely do not attempt to charge with large
amount of liquid refrigerant while operating the air
conditioner.
(4) Immediately disconnect the charge hose from the
3-way valve's service port.
- Stopping partway will allow the refrigerant to be dis-
charged.
- If the system has been charged with liquid refrigerant
while operating the air conditioner, turn off the air condi-
tioner before disconnecting the hose.
(5) Mount the valve stem caps and the service port
cap.
Use torque wrench to tighten the service port cap to a
torque of 18 N•m.
Be sure to check for gas leakage.
– 32 –
CS-C73KE
(Outdoor unit)