Mounting
Before installation, check that the motor's
direction of rotation is set according to the
image:
1.
Disconnect the power from the heat
pump.
2.
Connect the damper motor electrically, see page
30.
3.
Connect the supply to F730. Check that miniature
circuit-breaker (FC1) has not tripped. Set the heat
pump's switch (SF1) to position "".
4.
The damper motor now runs to the limit position for
closed damper.
5.
Install the damper motor on the outdoor air damper
(QN38).
Caution
Ensure that the damper is closed before
installing the motor.
6.
Insert the temperature sensor (BT28) through the
cable grommet on the outdoor air damper.
7.
Install the outdoor air damper in the duct.
Caution
Install the damper so that the temperature
sensor (BT28) is turned towards incoming
air. The damper must be in the closed pos-
ition when it is installed in the duct.
Adjusting ventilation
Activate ventilation adjustment for the outdoor air mix-
ture in menu 5.3.17 "outdoor air mixing". During the time
that the adjustment is active, the fan runs according to
the set value "fan speed outdoor air" and the outdoor air
damper is open.
1.
Enter menu 5.3.17 "outdoor air mixing".
2.
Tick “adjusting ventilation". The outdoor air damper
opens and the fan changes speed. The compressor
is stopped, if it is running, and the circulation pump
starts, if it is off.
3.
Measure the airflow at the ventilation device.
4.
If the ventilation flow is too high at outdoor air mix-
ing, reduce the fan speed.
5.
If the ventilation flow is too low at maximum fan
speed, restrict the outdoor air damper or reduce the
outdoor air damper's (QN38) degree of opening us-
ing the stop screws on the damper motor.
NOTE
During high fan speed combined with a short
outdoor air duct, the total air flow can be higher
than the air flow sensor's (BS1) measurement
range. The heat pump then shows the info text
"Fan setting too high, reduce set fan speed"
and/or alarm "Err: BS1 air speed sensor".
NIBE F730Chapter 4 | Pipe and ventilation connections22
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