59
EN
REFRIGERANT PIPING CONNECTION
Excessive force can break the nut or damage the refrigerant piping.
Do not exceed torque requirements shown in the table above.
DO NOT USE EXCESSIVE TORQUE
When connecting refrigerant pipes, be careful not to use
excessive torque or to deform the piping in any way. Begin
by connecting the low-pressure pipe, then the high-pressure
pipe.
When bending connective refrigerant piping, the minimum
bending radius is 10cm. See Fig.5.6.
1. Align the center of the two pipes to be connected.
See Fig. 5.7.
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.
STEP 4: CONNECT PIPES
MINIMUM BEND RADIUS
INSTRUCTIONS FOR CONNECTING
PIPING TO INDOOR UNIT
TORQUE REQUIREMENTS
Outer Diameter
of Pipe (mm)
Tightening Torque
(N•cm)
Add. Tightening Torque
(N•cm)
Ø 6.35 (Ø 0.25”)
1,500 (11lb•ft)
1,600 (11.8lb•ft)
Ø 9.52 (Ø 0.375”)
2,500 (18.4lb•ft)
2,600 (19.18lb•ft)
fig 5.6
fig 5.7
fig 5.8
Flare nut
Radius
Indoor unit tubing
≥10cm (4in)
Pipe
