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4. While firmly gripping the nut on the unit
tubing, use a torque wrench to tighten the
flare nut according to the torque values in
the Torque Requirements table below.
Loosen the flaring nut slightly, then
tighten again.
Torque Requirements
Outer
diameter of
Tightening
pipe
Torque
Ø 6,35 mm
1 500 N·cm
(Ø 0.25)
(11 lb·ft)
Ø 9,52 mm
2 500 N·cm
(Ø 0.375)
(18.4 lb·ft)
Ø 12,7 mm
3 500 N·cm
(Ø 0.5)
(33.19 lb·ft)
Ø 16 mm
4 500 N·cm
(Ø 0.63)
(33.19 lb·ft)
DO NOT USE EXCESSIVE TORQUE
Excessive force can break the nut or damage
the refrigerant piping. You must not exceed
the torque requirements shown in the table.
Connecting Piping to Outdoor Unit
1. Unscrew the cover from the packed valve
on the side of the outdoor unit. (See Fig.
5.9)
Fig. 5.8
2. Remove protective caps from ends of
valves.
3. Align flared pipe end with each valve, and
tighten the flare nut as tightly as possible
Additional
by hand.
Tightening
4. Using a wrench, grip the body of the valve.
Torque
Do not grip the nut that seals the service
1 600 N·cm
valve. (See Fig. 5.10)
(11.8 lb·ft)
USE THE WRENCH TO GRIP MAIN BODY OF
2 600 N·cm
VALVE
(19.18 lb·ft)
Torque from tightening the flare nut can
3 600 N·cm
snap off other parts of valve.
(26.55 lb·ft)
4 700 N·cm
(34.67 lb·ft)
5. While firmly gripping the body of the valve,
use a torque wrench to tighten the flare
nut according to the correct torque values.
6. Loosen the flaring nut slightly, then tighten
again.
7. Repeat Steps 3 to 6 for the remaining pipe.
Valve
Cover
Fig. 5.9
Fig. 5.10
117
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