Pioneer Inverter+ WAS Series Installation Manual page 27

Place flaring tool onto the form.
6.
Turn the handle of the flaring tool clockwise
7.
until the pipe is fully flared.
Remove the flaring tool and flare form, then
8.
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
low-pressure pipe, then the high-pressure pipe.
If provided by your supplier, apply leak guard
material on all flared mating surfaces.
MINIMUM BEND RADIUS
When bending connective refrigerant piping,
the minimum bending radius is 10cm (4"). See
Fig.5.6
.
Radius
Outer Diameter of Pipe (mm)
Ø 6.35 (Ø 1/4")
Ø 9.52 (Ø 3/8")
Ø 12.7 ( Ø 1/2")
Ø 16 ( Ø 5/8")
Ø 19 ( Ø 3/4")
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.
≥10cm (4in)
Fig. 5.6
TORQUE REQUIREMENTS
Tightening Torque (N•cm)
1,500 (11 lb • ft)
2,500 (18.4 lb • ft)
3,500 (25.8 lb•ft)
4,500 (33.2 lb•ft)
6,500 (47.9 lb•ft)
Instructions for Connecting Piping to
Indoor Unit
Align the center of the two pipes that you will
1.
connect. See Fig. 5.7
Indoor unit tubing
Fig. 5.7
Tighten the flare nut as tightly as possible by
2.
hand.
Using a spanner, grab the nut on the unit
3.
tubing.
While firmly holding the nut on the unit
4.
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. 5.8
Add. Tightening Torque (N•cm)
Flare nut Pipe
1,600 (11.8 lb • ft)
2,600 (19.2 lb • ft)
3,600 (26.6 lb•ft)
4,700 (34.7 lb•ft)
6,700 (49.4 lb•ft)
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