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Connection to adjacent room
max. 7 m
Adjacent room
Main room
Condensation
connection
If the temperature falls below the
dew point, condensation will form
on the cooling fins during cooling
mode.
A collection tray together with
a condensation pump and float
switch are fitted as standard below
the cooling fins. Should the float
switch trip a protective shutdown
due to inadequate removal of
the condensation, the pump will
switch on immediately and run on
for approx. three minutes.
The condensation pipe should
have a fall of min. 2 %.
This is the responsibility of
the customer. . If necessary,
fit vapour diffusion tight
insulation.
If the level of the condensation
pipe on the unit is above
that of the outlet, route the
pipe vertically upwards (max.
1000 mm from the bottom
edge of the unit) and then with
a fall to the drain.
The condensation pipe from
the unit should run freely
into the drainage pipe. If the
condensation runs directly
into a sewer pipe, fit a trap to
prevent any unpleasant odours.
When operating the unit at
outdoor temperatures below
0 °C, ensure the condensation
pipe is laid to protect it against
frost.
If necessary, fit supplementary
pipe heating.
Once the pipe has been laid,
check the condensation drains
off and permanently seal it.
Tightness check
Once all the connections have
been established, the pressure
gauge station is attached as
follows to the Schrader valve (if
fitted):
red = small valve
= injection pressure
blue = large valve
= suction pressure
Once connected, perform a
tightness test using dried nitrogen.
The tightness test involves
spraying a leak detection spray
onto the connections. If bubbles
are visible, the connections have
not been properly made. Re-
tighten the connection or prepare
a new flange.
If the tightness test is successfully
completed, depressurise the
refrigerant pipes and start a
vacuum pump with an absolute
final partial pressure of min. 10
mbar to remove the air in the pipe.
Any humidity present in the pipes
is also removed.
A vacuum of min. 20 mbar
abs. must be created!
CAUTION
The time required to generate
the vacuum is dependent on
the pipework volume of the
indoor unit and the length of the
refrigerant pipes. This always takes
at least 60 minutes.
Once any foreign gases and
humidity have been completely
extracted from the system, the
valves on the pressure gauge
station are closed and the valves
on the outdoor component are
opened as described in the chapter
on "Commissioning".
Entry of
fresh air
Inside Outside
Fresh air intake
23
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