Ventilation connection 15
For the Installer
FIGHTER 600P
FIGHTER 600P is connected so that all ventilation air
except the kitchen fan passes the evaporator (62) in
the heat pump. The lowest ventilation flow according
to current standards is 0.35 l/s per m
2
floor area. For
optimum heat pump performance this ventilation flow
should not be less than 120 m
3
/h. (34 l/s). With
exhaust air flow greater than 200 m
3
/h the outdoor air
duct is not connected. Accordingly FIGHTER 600P is
only used as an exhaust air heat pump.
In those cases the exhaust air flow falls below 200
m
3
/h an outdoor air duct with adjustment damper
should be connected to the heat pump. The heat
pump then normally works with the fan at maximum.
The maximum capacity of the fan is then distributed
between the planned exhaust air and outdoor air. With
outside temperatures lower than approximately - 5 °C
the fan automatically slows down to the selected set-
ting and the heat pump’s internal damper shuts out
the outdoor air, whereby the planned exhaust air flow
is maintained.
The heat pump’s installation area should be ventilated
by at least 36 m
3
/h (10 l/s).
FIGHTER 600P is equipped with a ventilation opening
in the base. As a result, an air flow of about 5 m
3
/h
(1,4 l/s) is taken directly from the room where the heat
pump is installed.
Changing the ventilation capacity is described under
“Electrical connection - Setting the fan capacity”. See
also “Circuit diagram”. The numbering of the curves
refers to the outlets on terminal (22).
See the section “Setting the ventilation”.
NOTE!
A duct in a masonry chimney stack
must not be used for extract air.
To prevent fan noise being transferred to the exhaust air
devices, it may be a good idea to install a silencer in the
duct. This is especially important if there are exhaust air
devices in bedrooms. If a twin duct system is used for
the exhaust air, each system should be fitted with a
silencer. Because the heat pump contains a flammable
refrigerant in the form of propane (R290), the air ducting
system must be earthed. This is done by making a
sound electrical connection to the exhaust air, extract air
and outdoor air ducts using the three earthing cables
supplied. The cables must then be connected to the
earthing studs on top of the top cover.
Duct connections should be made via flexible hoses,
which must be installed so that they are easy to replace.
The extract air and outdoor air ducts are to be insulated
using diffusion-proof material along their entire lengths.
Provision must be made for inspection of the duct. The
outdoor air duct should be fitted with an adjustment
damper. Make sure that there are no reductions of cross-
sectional area in the form of creases, tight bends etc,
since this will reduce the ventilation capacity. All joins in
the ducting must be sealed and pop-riveted to prevent
leakage. When the exhaust air flow is so great that no
outdoor air duct is fitted and the ventilation system is
connected only to the exhaust air sleeve the outdoor air
sleeve should be sealed. If the ventilation system is con-
nected to both the exhaust air sleeve and the ordinary
outdoor air sleeve the damper motor should be electri-
cally disconnected. This is done by removing the damper
motor’s cable ends on the relay card (terminals 36, 37
and 38) from the relay card and then insulated. The
damper can now be turned to the open position by hand
when the damper motor’s knob is pressed in.
The air duct system should, at a minimum, be of air tight-
ness class B.
The diagram below shows the available ventilation
capacity.
Fan diagram
Duct installation
Adjustment
The kitchen flue must not be connected to FIGHTER
600P.
Exhaust air duct
FIGHTER 600P works in average size houses, with
both exhaust air and outdoor air. This gives greater
savings than by using just exhaust air. However, at
outdoor temperatures below approximately - 5 °C, the
outdoor air flow is closed by means of an internal
damper and the heat pump now works with just the
exhaust air. In larger houses only the exhaust air
ducts are connected as the exhaust air here contains
sufficient amounts of energy.
General
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