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The units are factory filled with
dry nitrogen to check for leaks.
The pressurised nitrogen is
released when loosening the
union nuts.
CAUTION
Connection of refrigerant
pipes
The on site connection of the
refrigerant pipes is made inside the
unit.
It may be necessary to fit a reducer
or flared adapter to the indoor
unit. These fittings are included
as standard. Once installed, the
connections should be made tight
against vapour diffusion.
The following instructions describe
the installation of the refrigerant
circuit and the assembly of the
indoor unit and the outdoor
component.
1.
The required pipe diameters are
given in the table "Technical
data".
2. Remove the factory-fitted
protective caps and union
nuts on the connections.
These should be used during
installation.
3. Before flanging the refrigerant
pipes, ensure that the union nut
is fitted on the pipe.
4. Prepare the laid refrigerant
pipes as shown below
(Figure 6+7).
Only employ tools and
components suitable for
refrigeration applications.
NOTE
Flanging tool
7 Flanging the refrigerant pipe
Refrigerant pipe
Deburrer
6 Deburring the refrigerant pipe
8 Correct flange shape
Tighten 1. spanner
Counter
2. spanner
9 Tighten the fitting
Tightening
torque:
14
15-20 Nm
38
33-40 Nm
12
50-60 Nm
58
65-75 Nm
34
95-105 Nm
5. Verify that the shape of the
flange is correct(Figure 8).
6. First connect and hand-tighten
the refrigerant connections
to ensure they are correctly
seated.
7. Now fully tighten the fittings
using 2 suitably sized open-
ended spanners. Use one
spanner to counter the force
when tightening the fitting
(Figure 9).
8. Use insulation hoses which are
designed for this temperature
range and diffusion tight.
9. Lay the refrigerant pipes from
the indoor unit to the outdoor
component. In doing so, ensure
that they are sufficiently
attached and take measures for
the oil return, if necessary!
10.
Observe the permitted bending
radius for the refrigerant pipes
during installation. Never bend
a pipe twice in the same place.
Brittle pipes and potential
cracking are the consequences.
11.
Use the wall or floor brackets
to fit the outdoor component
against structural parts
approved to support the static
load (refer to the installation
instructions for the brackets).
REMKO MD
20
20


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