Installation, use and maintenance manual
DOCUMENT 6328408
53
does not weight down on the appliance
itself;
allows for maintenance work;
is suitably protected to avoid material
accidentally getting inside the appliance
itself;
does
not
exceed
the
maximum
recommended length of 6 metres (Ø160
pipe with 2 x 90° elbow unions).
The total maximum load loss for all
components, including feed-throughs for
mounting the appliance on an external wall,
in the pipe system should not be above 200
Pa.
During operation, the heat pump
tends to lower the temperature in
the room if the air is not ducted
towards the outside.
A suitable protective grille must
be installed where the air outlet
pipe connects with the outdoors,
to prevent foreign bodies from
entering the appliance. To
guarantee maximum product
performance, the grille must be a
low load-loss model.
To prevent condensation from
forming: insulate all air outlet
pipes and ducted air cover
fittings with a steam-tight thermal
coating of a suitable thickness.
Fit silencers where necessary to
prevent flow noise.
Equip the pipes, wall feed-
throughs and hook-ups to the
heat pump with a vibration
damping system.
NOTE: using an open-chamber
fire-box (e.g. an open fire) and
the heat pump at the same time
creates a dangerous drop in
pressure in the room. A drop in
pressure may cause reflux of the
output gases in the room.
Do not use the heat pump at the
same time as an open-chamber
firebox.
Only use a sealed-chamber
firebox
(approved)
with
a
separate line for combustion air.
Keep the doors in the rooms
where the boiler is located,
which
do
not
share
the
combustion air flow with living
spaces, closed and sealed.
5.2.1
Non-standard installations
One of the unique features of heat-pump
heating systems is that they create a
considerable drop in the temperature of the
air usually expelled outdoors. The expelled
air, in addition to being colder than the air in
the environment, is also fully dehumidified.
For this reason, the flow of air can be fed
back inside the building again to cool rooms
or spaces in the summer. A dual air outlet
pipe is installed, with two dampers attached
(A and B), so as to be able to direct the air
flow either indoors (Fig. 5a) or outdoors (Fig.
5b).
