31
CONNECTING REFRIGERANT PIPING (Cont.)
15-10 STEPS FOR 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 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 gas 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
following table (1). Be careful not to damage
the flare nut threads.
NOTE:
One. Insufficient tightening torque will
cause Freon leaks.
Two.
Over tightening the fitting will
damage the tube flaring and cause
Freon leaks.
15-11 STEPS FOR CONNECTING REFRIGERANT PIPING LINES TO OUTDOOR UNIT
•
Connecting the other ends of suction and
liquid piping lines respectively with suction
and liquid flare couplings of the outdoor
unit.
•
Repeat steps (A), (B), (C) when connecting
refrigerant piping lines to the couplings of
the outdoor unit.
(1)
Fingers tighten
several turns the
flare nuts of piping
at the outdoor unit
valves.
Table (1)
Half Union
Flare Spanner
or
Torque Wrench
Indoor
Side
Tightening Torque
Kg - Cm
Flare Nut
N.M
Kg - cm
3/8” 31-35
310-350
5/8” 50-55
500-550
Piping Lines
(2)
Tighten the flare
nuts with
adjustable wrench
or torque wrench.
Pot only from oil
refrigerating her and her
Flare nut
Summary of Contents for 42QG18-C
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