Midea MFE-60ARN1-RB4W Service Manual page 21

after the gas
coming out, then tighten the flare nut again. Make sure the pressure display in the
pressure indicator is a little higher than the atmosphere pressure. Then remove the
charge hose from the 3 way valve.
8) Fully open the 2 way valve and 3 way valve and securely tighten the cap of the 3 way
valve.
2. Air purging by refrigerant
Procedure:
1). Confirm that both the 2-way and 3-way valves are set to the closed position.
2). Connect the charge set and a charging cylinder to the service port of the 3-way
valve.
3). Air purging.
Open the valves on the charging cylinder and the charge set. Purge the air by
loosening the flare nut on the 2-way valve approximately 45' for 3 seconds then closing
it for 1 minute; repeat 3 times.
After purging the air, use a torque wrench to tighten the flare nut on the 2-way valve.
4). Check the gas leakage.
Check the flare connections for gas leakage.
5). Discharge the refrigerant.
Close the valve on the charging cylinder and discharge the refrigerant by loosening
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