Climate 5000 – 6720886909 (2018/04) 19
Refrigerant Piping Connection
Fig. 31.
Piping extension beyond flare form
Outer Diameter of pipe
(mm)
A (mm)
Min. Max.
Ø 6.35 0.7 1.3
Ø 9.52 1.0 1.6
Ø12.7 1.0 1.8
Ø 16 2.0 2.2
Ø 19 2.0 2.4
Table 6.
Flare form
Pipe
A
Fig. 32.
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.
1.14.4 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. 33.
Radius ≥10cm
Fig. 33.
Instructions for Connecting Piping to Indoor Unit
1. Align the centre of the two pipes that you will connect. See Fig. 34.
Indoor unit tubing Flare nut
Pipe
Fig. 34.
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. 35.
Torque requirements
Outer Diameter of
Pipe (mm)
Tightening Torque
(N·cm)
Add. Tightening
Torque (N·cm)
Ø 6.35 1,500 1,600
Ø 9.52 2,500 2,600
Ø12.7 3,500 3,600
Ø 16 4,500 4,700
Ø 19 6,500 6,700
Table 7.
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