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The units have been filled at
the factory with dry nitrogen to
check for leaks.
The pressurized nitrogen will
be released when the union
nuts are loosened.
CAUTION
Connection of
refrigerant lines
The on site connection of the
refrigerant lines is made inside the
unit.
If necessary, a reducer or
expansion fitting must be installed
on the interior units. These fittings
are part of the accessory kit
provided with the interior unit.
After assembly, the connections
must be insulated impervious to
vapor diffusion.
The following instructions describe
the installation of the refrigerant
circuit and the assembly of the
interior unit and the exterior unit.
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. At installation, check the
bending radii of the refrigerant
lines and never bend a pipe
twice at the same location.
This could result in brittleness
and danger of cracks.
4. Route the refrigerant lines from
the interior unit to the exterior
unit. Make sure they are
sufficiently attached and take
measures for the oil return, if
necessary!
5. Install the exterior unit with the
wall or floor bracket to statically
admissible building sections
(pay attention to the installation
instructions for the brackets).
6. Make sure that no body
vibration is transferred to part
of the building. Body
vibration transfers are reduced
by vibration dampers!
7. Remove the factory installed
protective caps as well as the
union nuts on the blocking
valve connections and use them
for further installation.
8. Before flanging the refrigerant
lines, make sure, that the union
nut is on the pipe.
9. Prepare the routed refrigerant
lines as shown below
(Fig. 12+13, page 23).
10.
Check if the flange has the
correct shape (Fig. 14,
page 23).
11.
Connect the refrigerant lines
with the blocking valves first by
hand, to ensure proper seating.
Use only tools which are
approved for use in an HVAC
environment. Pipe cutter,
deburrer, bending pliers and
flanging tool.
NOTE
12.
Then tighten the fittings with
2 properly sized open-ended
wrenches.
In any case, while tightening,
counter with one open-ended
wrench (Fig. 15, page 23).
13.
Apply appropriate heat
insulation to both installed
refrigerant lines, including
connector.
14.
Only use insulating hoses
suitable and diffusion-safe or
the temperature range.
Additional notes for
installation
■
For the combination of the
exterior unit with some interior
units, the connection of the
refrigerant lines may differ. In
that case, install the provided
reducer or expansion fittings to
the interior unit.
■
If the length of the connector
line is longer than
5 m, then refrigerant must be
added for initial operation. (See
chapter „Add refrigerant“).
REMKO ATY
22
22


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