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11.4.2.3. Cutting And Flaring The Piping
1. Please cut using pipe cutter and then remove the burrs.
2. Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused.
Turn the piping end down to avoid the metal powder entering the pipe.
3. Please make flare after inserting the flare nut onto the copper pipes.
11.4.3. Air Purging Of The Pipings And Indoor Unit
1) Checking a gas leakage
1. Remove the service port cap from 3-way valves.
2. Connect the Manifold gauge set to the service port of liquid side 3-way valve.
3. Connect the Charging Cylinder to the Manifold gauge set and open the valve of the Cylinder.
4. Open the low pressure side valve of the Manifold gauge for approx.10 seconds and then close.
5. Check gas-leakage of the connecting portion of pipings with the gas-leak detector.
<For the left pipings>
1) Measure the pressure.
2) Keep it for 5-10 minutes.
• Ensure if the pressure indicated on the gauge is as same as that of measured at first time.
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