37
Notions on refrigerant piping connection
6.3 Connecting the pipes to the outdoor
unit
1 Unscrew the valve unit cover on the side of the
outdoor unit.
Valve group
cover
Fig. 34
2 Remove the protective caps from the valve ends.
3 Apply a little lubricating oil only to the inner surface of
the countersink (B).
4 Align the end of the countersunk pipe with each valve,
then tighten the countersunk nut by hand as far as
possible.
5 Use a wrench to hold the valve body in place. Do not
fit the spanner round the nut that closes the service
valve (see “Fig. 35”).
m
USE A WRENCH TO HOLD THE MAIN
BODY OF THE VALVE.
The torque applied to tighten the countersunk
nut may cause other parts of the valve to
detach.
B
Fig. 35
6 Holding the valve body firmly, use a torque wrench
to tighten the countersunk nut to the correct torque
values.
7 Slightly loosen the flared nut, then tighten it again.
8 Repeat steps 3 to 7 for the other pipe.
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