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11.6. Gas charging
(After Evacuation)
Procedure: 1. Connect the charge hose to the charging cylinder. � Connect the charge hose which was 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 use a screwdriver to press the check valve on the charge set to purge the air (be careful of the liquid refrigerant). 3. Open the High side on the charge set and charge the refrigerant to the unit. � Be sure to open only the High side valve on the charge set to charge the system from the liquid-side (highpresure) pipe. (If the system cannot be charged with the specified amount of refrigerant, operate the compressor until the specified amount can be charged, and then close the valve at the bottom of the charge cylinder.) 4. Immediately disconnect the charge hose from both the 3-way valve service ports. 5. Mount the valve stem nuts and the service port caps onto the 3-way valves. � Use torque wrench to tighten the service port caps to a torque of 18 N.m. � Be sure to check for gas leakage.
