HTW IX39B5 Serie Manuel D'installation page 77

SPLIT 1X1 IX39B5
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 or 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.
Minimum bend radius: When bending connective refrigerant piping, the minimum bending radius is 10cm.
See Fig. 5.6.
Radius
Fig. 5.6
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
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.
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.
Flare nut Pipe
Outer Diameter of Pipe
(mm)
Ø 6,35 (Ø 0,25")
Ø 9,52 (Ø 0,375")
Ø 12,7 (Ø 0,5")
Ø 16 (Ø 0,63")
Fig. 5.8
Ø 19 (Ø 0,75")
6. REFRIGERANT PIPING CONNECTION
TORQUE REQUIREMENTS
Tightening Torque (N•cm)
1.500 (11lb•ft)
2.500 (18,4lb•ft)
3.500 (25,8lb•ft)
4.500 (33,19lb•ft)
6.500 (47,94lb•ft)
INSTALLATION MANUAL
Add. Tightening Torque
(N•cm)
1.600 (11.8lb•ft)
2.600 (19,18lb•ft)
3.600 (26,55lb•ft)
4.700 (34,67lb•ft)
6.700 (49,42lb•ft)
75
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