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7.3 Final work
Once the pipes and electric cables have been connected, the
pipes must be bent and a leak test must be carried out. The leak
test must be carried out with particular care, as a refrigerant
leak results in a direct reduction in output.
Leaks are also difficult to identify once the installation is com-
plete.
7.3.1 Pipe bends
Bend the pipes by covering the connection cable and refriger-
ant pipe (between the indoor and outdoor unit) with insulation
and fix the insulation in place with two adhesive tapes.
1)
Fix the refrigerant pipe, mains cable and connection cable
with adhesive tape from bottom to top. Fix the bound pipe-
work along the wall.
2)
Form a siphon to prevent water from entering the chamber
and electrical components.
3)
Fix the pipework to the wall using clamps or similar.
Wrap the pipework in adhesive tape
1)
Fix the pipes, mains cable and connection cable with adhe-
sive tape from bottom to top. If they are fixed from top to
bottom, rain could enter into the pipes or cables.
2)
Fix the bound pipework along the external wall with clamps
or similar.
3)
A siphon prevents water from entering the electrics.
Seal small gaps
Seal a small
around the pipe,
opening around
e.g. with silicon.
the pipings with
gum type sealer.
A siphon prevents water from entering the electrics
EN-20
Pipe
Adhesive tape
(narrow)
Wrapped in
adhesive tape
(wide)
Adhesive tape
Drain hose
(not used)
Adhesive tape
Klebeband
Connection cable
Refrigerant pipes
Mains cable
452172.66.01-EN · FD 0204
LIA 0608HWCF M - LIA 0911HWCF M
7.4 Leak test and evacuation
Air and moisture in the cooling system have unwanted effects
as outlined below.
1)
The pressure in the system increases.
2)
The operating current increases.
3)
The cooling (or heating) output falls.
4)
Moisture in the cooling circuit can freeze and block the
capillary tubes.
5)
Water can cause corrosion on parts in the cooling
system.
This means that the indoor and outdoor unit, as well as the con-
nection pipe, must be checked for leaks and pumped empty to
remove any non-condensable gases and moisture from the
system.
7.4.1 Preparation
Ensure that each pipe (liquid and air side) between the indoor
and outdoor unit is connected correctly and the wiring for the
test operation has been carried out. Remove the maintenance
valve caps from both the gas and liquid side of the outdoor unit.
Ensure that both maintenance valves on the liquid and air side
of the outdoor unit are closed at this point.
Seal small gaps around
the pipe, e.g. with silicon.
Siphon
T rap
Siphon
www.glendimplex.de
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