6.6.2
Connect the refrigerant connections to the indoor module
Caution
Keep the refrigerant connection in place on the indoor module with
a spanner so as not to twist the internal pipe.
Fig.39
A
B
MW
-1
0
0
1
3
0
0
-1
1/2"
5/8"
1/4"
3/8"
5/8"
3/8"
5/8"
3/8"
EH146
100015480
Tab.20
Association with an out
door unit
Indoor module gas line fitting
Indoor module fluid line fitting
A: 4.5 and 6 kW
5/8" <=> 5/8" to 1/2" adapter from package
EH146 <=> 1/2" nut from package EH146
Discard the original 5/8" nut
3/8" <=> 3/8" to 1/4" adapter from package
EH146 <=> 1/4" nut from package EH146
Discard the original 3/8" nut
B: 8, 11 and 16 kW
5/8" <=> Original 5/8" nut
Remove and discard the cap
3/8" <=> Original 3/8" nut
Remove and discard the cap
1. Check the exchanger leak-tightness: partially unscrew the "gas" nut.
A release noise should be heard, which is proof that the exchanger
is watertight.
2. Undo the nuts on the indoor module.
3. Fit the connections as shown in the above table, using the copper
seals for the adapters and adhering to the torque load.
Tab.21 Torque load to be applied
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
4. Bead the pipes.
5. Connect the pipes and tighten the nuts, adhering to the torque load
and applying refrigerant oil to the beaded parts to facilitate tightening
and improve leak-tightness.
Fig.38
MW
-1
0
0
1
2
0
7
-1
Fig.40
MW-1001208-2
OK
Pfffff...
1
6 Installation
42
AWHP-2 PBS-i
7706696 - v04 - 11102018