Page 31
Refrigerant piping
Connection
2.
Tighten the flare nut as tightly as possible by
hand.
3.
Using a spanner, grip the nut on the unit
tubing.
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.
Instructions for Connecting Piping to Outdoor Unit
USE SPANNER TO GRIP MAIN
BODY OF VALVE
Torque from tightening the flare nut can snap
off other parts of valve.
TORQUE REQUIREMENTS
Outer Diameter of Pipe
(mm)
Tightening Torque
(N•m)
Flare dimension(B)
(mm)
Flare shape
Ø 6.35 (Ø 0.25”)
8.4~8.7 (0.33~0.34”)
13.2~13.5 (0.52~0.53”)
16.2~16.5 (0.64~0.65”)
19.2~19.7 (0.76~0.78”)
23.2~23.7 (0.91~0.93”)
18~20(180~200kgf.cm)
32~39(320~390kgf.cm)
49~59(490~590kgf.cm)
57~71(570~710kgf.cm)
67~101(670~1010kgf.cm)
Ø 9.52 (Ø 0.375”)
Ø 12.7 (Ø 0.5”)
Ø 16 (Ø 0.63”)
Ø 19 ( Ø 0.75”)
1.
Unscrew the cover from the packed valve on
the side of the outdoor unit.
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 by
hand.
4.
Using a spanner, grip the body of the valve.
Do not grip the nut that seals the service
valve.
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.
DO NOT USE EXCESSIVE TORQUE
Excessive force can break the nut or damage the refrigerant piping. You must not exceed
torque requirements shown in the table above.
Valve cover
R0.4~0. 8
45
°±
2
90
°
±
4
B
