CONNECTING REFRIGERANT PIPING
17-10 STEPS OF CONNECTING REFRIGERANT PIPING LINES TO INDOOR UNIT
Connecting suction and liquid piping
lines respectively with suction and
liquid half unions of indoor unit.
A. Lubricate flare nuts of suction and liquid
piping line end and the threads of the suction
and liquid half unions of indoor unit with anti
– freeze oil.
This is effective for reducing refrigerant
leaks.
B. For proper connection, align the centers of
suction union pipe and flare pipe straight with
each other, then finger tighten several turns
the flare nut tightly at first to obtain a smooth
match.
C. Then hold the union side with a double-ended
wrench and tighten the flare nut by applying
the tightening torque indicated in the table.
Be careful not to damage the flare nut
threads.
NOTES
a. Insufficient tightening torque
will cause refrigerant leaks.
b. Over tightening the torque will
damage the tube flaring and
cause refrigerant leaks.
17-11 STEPS OF CONNECTING REFRIGERANT PIPING LINES TO OUTDOOR UNIT
Connecting the other ends of suction
and liquid piping lines respectively
with suction and liquid flare valves of
the outdoor unit.
Repeat steps (A), (B), (C) when
connecting refrigerant piping lines to
the flare valve of the outdoor unit.
(1)
Fingers tighten
several turns the
flare nuts tightly of
first to obtain a
smooth match
Flare Spanner or
Torque Wrench
(2)
Tighten flare nuts
with adjustable
wrench or torque
wrench.
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