Gas Charging - Panasonic CU-C18CKV Service Manual

CS-C18CKV CU-C18CKV / CS-C24CKV CU-C24CKV

11.1.6. Gas charging

(After Evacuation)
Procedure:
1. Connect the charge hose to the gas charging cylinder.
• • • • 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). The procedure is the
same if using a gas cylinder.
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 150g 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)
4. Immediately disconnect the charge hose from the
3-way valve's service port.
• • • • Stopping partway will allow the refrigerant to be
discharged.
• • • • If the system has been charged with liquid refrigerant
while operating the air conditioner, turn off the air
conditioner before disconnecting the hose.
5. Mount the valve caps and the service port caps.
• • • • Use a torque wrench to tighten the service port nut.
• • • • Be sure to check for gas leakage.
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