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Decide piping length and then cut by using pipe cutter. Remove
burrs from cut edge. Make flare after inserting the flare nut
(locate at valve) onto the copper pipe. Align center of piping to
valves and then tighten with torque wrench to the specified
torque as stated in the table.
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.
10.3.3. Air Purging Of The Pipings And Indoor Unit
The remaining air in the Refrigeration cycle which contains moisture may cause malfunction on the compressor.
1. Remove the caps from the 2-way and 3-way valves.
2. Remove the service-port cap from the 3-way valves.
3. To open the valve, turn the valve stem of 2-way valve counter-clockwise approx. 90° and hold it there for ten seconds, then
close it.
4. Check gas-leakage of the connecting portion of the pipings.
* For the left pipings, refer to item 4(A).
5. To open 2-way valve again, turn the valve stem counter-clockwise until it stops.
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