The units are factory filled with
dry nitrogen to check for leaks.
The pressurised nitrogen is
released when the union nuts
are loosened.
CAUTION
Connecting the
refrigerant lines
The on-site connection of the
refrigerant lines
is undertaken
inside the unit.
It may be necessary to fit a reducer
or flared adapter to the indoor
unit. These fittings are included
with the indoor unit as an
accessory kit. Once installed, the
connections should be sealed to
prevent vapour diffusion.
The following instructions describe
the installation of the refrigerant
circuit and the assembly of the indoor
unit and the outdoor component.
1. Check the "Technical Data"
chart for the required pipe
diameters and connect the
refrigerant line.
2. To bend the copper tubing, use
the appropriate bending tool to
prevent kinks in the tubing.
3. Observe the permitted bending
radius for the refrigerant pipes
during installation. Never bend
a pipe twice in the same place.
Brittleness and cracking can
result.
4. Lay the refrigerant lines from
the indoor unit to the outdoor
component. Ensure that the
fastenings are adequate and if
necessary, take appropriate oil
return measures!
5. 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).
6. Ensure that structure-borne
sound is not transferred to parts
of the building. Use vibration
dampers to reduce the effects
of structure-borne sound!
7. Remove the factory-fitted
protective caps and the union
nuts from the blocking valve
connections and use them for
further installation.
8. Before flanging the refrigerant
lines, ensure that the union nut
is on the pipe.
9. Prepare the refrigerant lines as
shown below
(figure 12+13, page 23)
.
10. Check if the flange has the
correct shape
(figure 14, page 23)
.
11
Before connecting the injection
line, remove the valve core
in the indoor unit connection
ports.
12. First connect and hand-tighten
the refrigerant connections
to ensure they are correctly
seated.
Use only tools which are
approved for use in an HVAC
environment.
Pipe cutter,
deburrer, bending pliers and
flanging tool.
NOTE
13. Now fully tighten the fittings
using 2 suitably sized open-
ended spanners.
Use one spanner to counter
the force when tightening the
fitting
(figure 15, page 23)
.
14. Apply appropriate heat
insulation to both installed
refrigerant lines, including
connector.
15. Only use insulating hoses
suitable and diffusion-safe or
the temperature range.
Supplementary information
for Installation
■
When combining the outdoor
component with some indoor
units, the connection of the
refrigerant pipes may differ.
In that case, install the provided
reducer or expansion fittings to
the indoor unit.
■
If the basic length of the
refrigerant line exceeds
5 m, add refrigerant when
commissioning the system for
the first time. (See chapter
"Add refrigerant").
REMKO ATY
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