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5 Installation
Fig.124
Pipe adapter
5.6.4
Connecting the refrigerant connections to the outdoor unit
Fig.125
Fig.126
1/4"
7
5
9
3
5.6.5
Testing the leak-tightness of the refrigerant connections
Fig.127
1
MW-1001650-3
122
6. Add a pipe adapter if necessary
7. Engage the nuts from the accessory bag onto the refrigerant pipes.
8. Flare the refrigerant connections.
9. Apply refrigerant oil to the flared parts to facilitate tightening and
10. Tighten the connections, observing the given tightening torques.
MW-6020161-01
1. Remove the protective side panel from the outdoor unit.
2. Check that the stop valves are closed.
3. Remove the protective caps from the valves and throw them away.
MW-1001648-1
4. Cut the refrigerant pipes coming from the indoor unit with a pipe cutter
A
5. Liquid line: use the new nut from the accessory bag.
6. Gas line: use the new nut from the accessory bag.
7. Flare the refrigerant pipes.
8. Apply refrigerant oil to the flared parts to facilitate tightening and
6
9. Tighten the connections, observing the given tightening torques.
9
3
MW-6020072-01
1. Remove the protective cap from the service connection on the stop
2. Connect the pressure gauge and the nitrogen bottle to the service
42 bar
3. Check the leak-tightness of the refrigerant connections on the indoor
2
4. Release the pressure and release the nitrogen.
improve the seal.
Tab.86
External diameter of
External diameter of
the pipe (mm/inch)
the cone fitting (mm)
6.35 - 1/4
17
9.52 - 3/8
22
12.7 - 1/2
26
15.88 - 5/8
29
19.05 - 3/4
36
Caution
Use a second wrench to prevent the refrigeration link from
twisting.
and deburr.
improve the seal.
Tab.87
External diameter of
External diameter of
the pipe (mm/inch)
the cone fitting (mm)
6.35 - 1/4
17
9.52 - 3/8
22
12.7 - 1/2
26
15.88 - 5/8
29
19.05 - 3/4
36
valve.
connection then progressively build up the pressure in the refrigerant
connection pipes and the indoor unit to 42 bar, in 5 bar increments.
and outdoor units, using a leak detector spray. If leaks appear, repair
the leak and repeat the steps 1 to 3 in order and check the leak-
tightness once again.
Torque load (N.m)
14 - 18
34 - 42
49 - 61
69 - 82
100 - 120
Torque load (N.m)
14 - 18
34 - 42
49 - 61
69 - 82
100 - 120
7797831 - v04 - 07122022
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