6.6.3
Connecting the refrigerant connections to the outdoor
unit
Caution
Keep the refrigerant connection in place on the outdoor unit with a
spanner so as not to twist the internal pipe.
1 Do not use a spanner on this part of the valve, there is a danger of
the refrigerant leaking.
2 Recommended position of the spanners for tightening the nut.
Tab.18
Association with an out
door unit
Indoor module gas line fitting
Indoor module fluid line fitting
A: 22-27 kW for 3/4"
Original nut
Original nut
B: 22-27 kW for 1"
3/4" to 1" adapter, braze-on type
Original nut
1. Remove the protective side panels from the outdoor unit.
2. Unscrew the nuts on the stop valves.
3. Slip the nuts onto the pipes.
4. Bead the pipes.
AWHP 22 TR–2 and AWHP 27 TR-2 models (1" braze-on fitting): Slip
the nut onto the adapter. Bead the adapter. Braze the connecting pipe
to the local pipe without oxygen. Braze in a nitrogen atmosphere.
5. Apply refrigerant oil to the beaded parts to facilitate tightening and
improve the seal.
6. Connect the pipes and tighten the nuts with a torque wrench.
Tab.19
External diameter of
the pipe (mm/inch)
External diameter of
the cone fitting (mm)
Torque load (N.m)
6.35 - 1/4
17
14 - 18
9.52 - 3/8
22
34 - 42
12.7 - 1/2
26
49 - 61
15.88 - 5/8
29
69 - 82
19.05 - 3/4
36
100 - 120
6.6.4
Adding the necessary quantity of refrigerant fluid
Add refrigerant fluid via the refrigerant stop valve using a safety loader, if
the refrigerant pipes exceed the lengths below.
Caution
Prevent oil traps.
If the pipes are not connected immediately, plug them to prevent
moisture from entering.
Fig.27
MW-1001239-1
1"
1
2
2
1
2
2
B
A
Fig.28
MW-5000512-2
6 Installation
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