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pipe.
（3）Fit the flare nut on the pipe.
（4）Flare the pipe.
（5） Check that the flaring is properly made.
Warning
①. DO not use mineral oil on flared part.
②. Prevent mineral oil from getting into the system as this would reduce the lifetime of the
units.
③. Never use piping which had been used for previous installations. Only use parts which are
delivered with the unit.
④. Do never install a drier to this R410A unit in order to guarantee its lifetime.
⑤. The drying material may dissolve and damage the system.
⑥. Incomplete flaring may cause refrigerant gas leakage.
Connecting the refrigerant pipe:
（1）Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts
and gas leaks.
（2）Align the centres of both flares and tighten the flares and tighten the flare nuts 3 or 4
turns by hand. Then tighten them fully with the torque wrenches.
（3）To prevent gas leakage, apply refrigeration oil on both inner and outer surfaces in the
flare. (Use refrigeration oil for R410A.)
28/36 class
3/8 inch
32.7-39.9 N.m
(333-407kfg.cm)
Copyright 2018. This translation is property of GREE PRODUCTS SL. All rights reserved. Total or partial reproduction without its express authorization is prohibited.
Multi Variable Air Conditioners Floor and Wall Mounted Type Indoor Unit
Flarenut tightening torque
Gas side
50 class
1/2 inch
49.5-60.3 N.m
(505-615kfg.cm)
9
Liquid side
28/36/50 class
1/4 inch
14.2-17.2 N.m
(144-175kfg.cm)
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