Nibe FIGHTER 410P, Installation And Maintenance Instructions Manual, Page: 23 / 36

Commissioning and adjusting
To empty the water heater proceed as follows:
■
Disconnect the overflow pipe from the drain con-
nection (79) and connect a hose to a draining pump
instead. Where no draining pump is available, the
water can be released into the overflow funnel
(99).
■
Open the safety valve (47).
■
Open a hot water tap to let air into the system. If
this is not enough, undo a pipe coupling (74) on
the hot water side and pull out the pipe.
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. NOTE! Safety valve (52) also acts as a manu-
al venting valve. Operate it with care, since it opens
quickly. Also vent through the supply air battery’s vent-
ing screw (5). When the system is stable (correct pres-
sure and all air eliminated) the automatic heating con-
trol system can be set as required. See the section
Room temperature - Setting the Automatic heating
control system and Front panel.
The hot water can be drained off through drain valve
(51) using an R15 (1/2") hose coupling. Remove the
cover (80) from the valve. Now screw on the hose cou-
pling and open valve (51).
Open safety valve (52) to let air into the system.
Draining the heating system
Readjustment
Emptying
the water heater
The supply air battery is connected in parallel with the
house’s heating system. The trim valve (81) may need
to be adjusted to attain the correct flow in the battery
and heating system. See the section Pipe connection
– Supply air battery
Setting the supply air
battery’s water flow
21
For the Installer
FIGHTER 410P
Ventilation flows and fan transformer settings are given
on the ventilation drawing.
■
Change the fan capacity by moving the exhaust
and supply air fans’ connection cables on terminal
block (22). To ensure the lowest possible noise lev-
el, set the fans for the lowest possible capacity.
■
Set the correct ventilation flow on the house’s
exhaust and supply air devices.
Setting the ventilation
When the tap water and the central heating system
have been filled up, the unit shall be running at maxi-
mal, normal temperature during minimum one hour.
After that the systems shall be flushed out and re-filled
again.
Cleaning the system /
Flushing out of the hot water
and central heating system