REMKO RVD 351 DC - Manual (Page 20)

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 at the
rear of the unit.
It may be necessary to fit a reducer
or flared adapter to the indoor
unit. These fittings are included
as standard with the indoor unit.
Once installed, the connections
should be made tight against va-
pour diffusion.
The following instructions describe
the installation of the refriger-
ant 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 pro-
tective 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
(Fig. 6+7).
Only employ tools and com-
ponents suitable for refrigera-
tion 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:
“ 15-20 Nm
“ 33-40 Nm
“ 50-60 Nm
“ 65-75 Nm
“ 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 span-
ner 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 at-
tached and take measures for
the oil return, if necessary!
10. Observe the permitted bend-
ing 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 ap-
proved to support the static
load (refer to the installation
instructions for the brackets).
REMKO RVD...DC
20