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6.
Place flaring tool onto the form.
7.
Turn the handle of the flaring tool clockwise
until the pipe is fully flared.
8.
Remove the flaring tool and flare form, then
inspect the end of the pipe for cracks and
even flaring.
Step 4: Connect pipes
When connecting refrigerant pipes, be careful
not to use excessive torque or to deform the
piping in any way. You should first connect the
indoor unit, then the outdoor unit.
TORQUE REQUIREMENTS
Instructions for Connecting Piping to
Indoor Unit
1.
Align the center of the two pipes that you will
connect. See Fig. 5.7
.
Indoor unit tubing Flare nut Pipe
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.
Fig. 5.7
Fig. 5.8
Refrigerant
Piping
Connection
Outer Diameter of Pipe (mm) Tightening Torque (N•cm) Add. Tightening Torque (N•cm)
4,500 (33.19lb•ft)
6,500 (47.94lb•ft)
4,700 (34.67lb•ft)
6,700 (49.42lb•ft)
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.
1/4 1,500 (11lb•ft) 1,600 (11.8lb•ft)
3/8 2,500 (18.4lb•ft) 2,600 (19.18lb•ft)
1/2 3,500 (25.8lb•ft) 3,600 (26.55lb•ft)
3/4
5/8
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