DeDietrich AWHP-2 MIT-IN-2 iSystem Installation And Service Manual page 35

AWHP-2 MIT-IN-2 iSystem
22TR - 27TR
A
9
C
9
10
25/06/2014 - 7616371-001-04
8
M002400-B
B
9
D
9
M002401-G
10
M002402-A
8. Models 22 TR and 27 TR
If the length of the piping is less than 20 m, it is possible to use
annealed pipe for the gas pipe with a diameter of 3/4 without using
braze-on adapters. The output in cooling mode may be reduced
to 20% depending on the length used.
Using the 1" braze-on gas pipe:
Braze the 1" gas pipe on to the braze-on adapter, circulating
dehydrated nitrogen inside the pipe to prevent oxidation.
CAUTION
Do not overheat the pipe, protect the insulation and the
inside module when brazing.
Use hard solder.
Using the 3/4" crown gas pipe:
Slip the nut onto the pipe. Bead the pipes.
9.
A Only for 4 - 6 MR-2 models
B Only for 8 - 11 - 16 MR-2 models
C Only for 22 TR models
D Only for 27 TR models
Apply refrigerant oil to the beaded parts to facilitate tightening and
improve watertightness.Apply refrigerant oil to the beaded parts to
facilitate tightening and improve watertightness.
Connect the pipes and tighten the nuts with a dynamometric
spanner.
CAUTION
Keep the frigorific connection in place on the MIT-IN-2 with
a spanner so as not to twist the internal pipe.
External diameter of the
pipe (mm-inch)
6.35 - 1/4
9.52 - 3/8
12.7 - 1/2
15.88 - 5/8
19.05 - 3/4
10.Remove the protective side panels from the outdoor module.
External diameter of Torque load (Nm)
the cone connection
(mm)
17 14 - 18
22 34 - 42
26 49 - 61
29 69 - 82
100 - 120
4. Installation
33