Gas Charging - Panasonic CS-C9DKZW Service Manual

11.4. Gas charging

(After Evacuation)
Procedure:
1. Connect the charge hose to the charging cylinder.
• Connect the charge hose which you disconnected from
the vacuum pump to the valve at the bottom of the
cylinder.
• If you are using a gas cylinder, also use a scale and
reverse the cylinder so that the system can be charged
with liquid.
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 (Lo 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)
4. Immediately disconnect the charge hose from both the
3-way valve's service ports.
• 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 stem nuts and the service port caps.
• Use a torque wrench CWHAD-9211 to tighten the
service port nut to a torque of 1.8 N.m.
• Be sure to check for gas leakage.
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CS-C9DKZW CU-2C18DKH / CS-C9DKZW CU-3C20DKH