SDHWM.230817
Swegon reserves the right to make changes.
3
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3.1. Installation of the air heater/cooler in
the duct system
The unit is installed in the outdoor air duct when con-
nected as preheater/chiller. The air heater/cooler must
be mounted horizontally. Remember that the conden-
sate outlet must be connected to the building's drain-
age system. There should be at least 500 mm free space
in front of the hatch.
The condensate hose is connected to the condensate
outlet (G3/8"). The condensate is led off to a floor
drain or the like using a hose with an inner diameter
of at least 12 mm. The condensate hose (502130) is
available as an accessory for air heater/cooler W2504F.
The hose must not be led off directly to the drain. There
must be two water traps or a horizontal section on the
condensate hose. The damming height of the water
trap should be at least 100 mm.
Check that the condensate discharge outlet is not
3. Installation
In the winter the air heater/cooler heats the air taken
in and ensures that the ventilation unit operates with
the greatest efficiency even in extreme cold. In the
summer, the medium in the ground circuit is used to
cool the building. The control technology in CASA
Smart ventilation units automatically enables the best
utilisation of the air heater/cooler all year round.
1. General Description
2. Planning
To observe during planning: when sizing the depth of
the ground source heating well, review the capacity
tables in the brochure and take into account the air
heater/cooler’s capacity for the established airflows. To
size the pump, find out the heating medium flow and
the air heater/cooler’s pressure loss. Take the pressure
loss caused by the air heater/cooler into consideration
when sizing the airflows.
The air heater/cooler must always be mounted
horizontally, as condensate is formed during the
summer and this must be led to a drain.
Reserve servicing space at the sides of the unit in the plans.
3.2. Pipe connections for the heating medium
The pipes for the air heater/cooler’s heating medium is
connected to the unit’s pipe connections (Cu 22 mm)
for the outgoing solution and the return solution.
Remember the need to vent the heating medium pipes
in connection with the pipe installation. The air heater/
cooler’s coarse filter must always be installed on the
unit’s outdoor side.
The following must be taken into consideration when
the air heater is connected to the pipe system:
1. The air heater/cooler’s connection pipes must not
be subjected to distortion or bending movements
when the connections are made. Counterhold with
a tool when assembling the couplings.
2. Ensure that the unit’s expansion forces or the pipe
system’s own weight does not load the connections
on the air heater/cooler.
3. To facilitate venting of the air heater/cooler,
heating medium is generally supplied through the
lowermost pipe on the heater/cooler. The venting
valve is normally placed at the highest point of the
pipe system.
4. The air heater/cooler and its connections must be
checked for leakage once the pipe system has been
completely filled.
clogged and check its outflow by pouring water on the
bottom of the ventilation unit.
The condensate pipe must be placed in a heated space.
A condensate pipe that is installed in a cold space
must always be insulated with at least 50 mm mineral
insulation or 30 mm cellular rubber insulation and fitted
with a heating cable.
The ducts are mounted on the air heater/cooler’s
Ø250 mm connection sleeves. The ducts are slid into
the sleeves and locked with pop rivets. Keep in mind
that the ducts’ insulation must run right up to the unit.
After the air heater/cooler, the supply air duct must be
insulated using 10 mm thick mineral wool in both the
heated and cold areas (remember moisture insulation).
The outdoor air duct, the ducts after the air heater/
cooler as well as the outgoing exhaust air duct must
also be insulated against moisture (for example with a
layer of plastic film above the layer with insulation or
cellular-rubber insulation).
