Nibe FIGHTER 120, Installation And Maintenance Instructions Manual

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14 NIBE FIGHTER 120
For the Installer
Commissioning and adjusting
Commissioning Adjusting the pump flow
In order to regulate the heat pump’s circulation pump
correctly, the trim valve must be adjusted at installation.
This valve is factory set, however, the valve may need
adjusting depending on the distance between the air
treatment section and the water heater and dimensions
of pipes.
A correctly set valve can be checked by allowing the
heat pump heat up the water heater from cold. Carry
out the following:
Q
Drain 30 – 50 l to make sure that there is cold water
in the bottom of the water heater
Q
Allow the heat pump (compressor) to start and wait
for 15 minutes for all values to stabilise
Q
Enter menu ”VIEW” and check that:
– ”T BOTTOM” is less than 15 °C (If not – drain
more water)
– ”T FORWD” = Set value +/- 2 °C (standard 57 °C).
– ”PUMP SPD” = 5 % – 20 %
If ” T FORWD” is lower than the set value or ”PUMP
SPD” is less than 5 % , the trim valve (81) must be
throttled more. Close the valve in increments of 1/8 of a
turn, wait 5 minutes and read off the menus as above.
Repeat until the conditions above are fulfilled.
If ”
PUMP SPD” is greater than 20 % the valve should
be opened further. Open the valve in increments of 1/8
of a turn, wait 5 minutes and read off the menus as
above. Repeat until the conditions above are fulfilled.
The heat pump’s switch(8) must
not be moved to position 1 until
the water heater has been filled.
Otherwise there is a risk of damag-
ing the heat pump’s components.
NOTE!