Nibe FIGHTER 1110 - System Checks and Readjustment Procedures

Commissioning and adjusting
FIGHTER 1110
For the Installer
24
The heating medium system is filled with water until
the required pressure is reached and then vented.
Air is initially released from the hot water and venting
may be necessary. If bubbling sounds can be heard
from the heat pump, the entire system requires further
venting. When the system has stabilised (correct pres-
sure and all the air removed) the heating controls can
be set at the required value.
Check the fluid level in the level vessel (85). If the
level has dropped, close the valve under the vessel.
You can then fill through the connection at the top of
the vessel. After filling, open the valve again.
The pressure is raised by closing the valve on the
incoming main line when the brine pump (KB) is run-
ning and the level vessel (NK) is open, so that liquid is
drawn down from the vessel.
Readjustment,
brine side
■ Set the switch to 1.
■ Check the settings on the control computer, and
adjust so there is a heating requirement.
■ Go to the Brine-pump menu, Add-drift in the ser-
vice menu. Set the Brine-pump to position 1 and
press Operating mode. Set the Add-drift to position
1 and press Operating mode.
■ Ensure the brine and heating medium pumps are
vented and help the pumps to start if necessary.
■ Go to the Brine In, Brine Out menu. Ensure that
the temperature corresponds with the ground/rock
temperature, which indicates the brine fluid flow.
■ Go to the Brine-pump menu, Add-drift in the ser-
vice menu. Set Add-drift to 0, the compressor
starts, and go to the Brine In, Brine Out menu.
Read the brine fluid temperatures. The difference
between these two temperatures should be 2 –
5°C when the system has come into balance. A
high difference indicates a high brine flow. A low
difference indicates a high brine flow.
■ Particular attention should be given to the level in
the collector system when using the heat pump at
first. Some topping-up may be necessary.
■ Read the heat medium temperatures WW-out and
WW-in. The difference between these two temper-
atures, with floating condensing, should be 5 –
10°C when the heat pump heats the hot water
without additional heat. A high difference could
depend on a low heat medium flow.
■ Fill in the commissioning report on page 2.
■ Set the control computer to suit the needs of the
building.
Filling the heating /
heating medium system
Start-up and inspection
Readjustment,
heat medium side