Nibe FIGHTER 1220, Installation And Maintenance Instructions Manual

Page: 22 / 60

Commissioning and adjusting 20
FIGHTER 1220
For the Installer
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
pressure 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 lev-
el 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.
To raise the pressure, close the valve on the incoming
main pipe when the brine pump (KBP) is running and
the level vessel (NK) is open, so that water is drawn in
from the vessel.
The siphon principle is used to empty the water
heater. This can be done either via the drain valve on
the incoming cold water pipe or by inserting a hose
into the cold water connection.
Readjustment, brine side
Emptying the water heater
■
Set the switch (8) to 1.
■
Check the settings on the display unit, and adjust
so there is a heating requirement.
■
Select Service from menu 8.1.1.
■
Switch Electric boiler mode on menu 9.2.4 to On.
■
Select brine pump 10 days from menu 9.2.12 to
run the brine pump continuously for 10 days. After
10 days the brine pump automatically returns to
normal operation.
■
Ensure the brine and heating medium pumps are
vented and help the pumps to start if necessary.
■
Go to menu 5.0 which shows brine supply/return.
Ensure that the temperature corresponds with the
ground/rock temperature, which indicates the brine
flow.
■
Switch Electric boiler mode on menu 9.2.4 to Off.
■
Select the required operating mode with the oper-
ating mode selector knob.
The compressor will start, and go to menu 5.0.
Read the brine temperatures. The difference
between these two temperatures should be 2 —
5°C when the system has come into balance. A
high difference indicates a low brine flow. A low dif-
ference indicates a high brine flow.
■
Particular attention should be given to the level in
the collector system when initially using the heat
pump. Some topping-up may be necessary.
■
Check the Flow temperature on menu 2.0 and
Return temperature on menu 2.7. The difference
between these two temperatures, with floating con-
densing, 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 system to suit the needs of the
building.
Readjustment, heat medium
side
Start-up and inspection