Nibe FIGHTER 310P, Installation And Maintenance Instruction, Page: 21 / 36

Commissioning and adjusting
To empty the water heater proceed as followings:
■
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. When the system is stable (correct pressure
and all air eliminated) the automatic heating control
system can be set as required. See the section “Room
temperature” “Setting the Automatic heating control
system” and “Front panel”.
The heating 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
coupling and open valve (51).
Open safety valve (52) to let air into the system.
19
For the Installer
FIGHTER 310P
Draining the heating system
Readjustment
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
Emptying the water heater
Ventilation flows and fan transformer settings are given
on the ventilation drawing.
■
To change fan capacity, if necessary, move the
exhaust air fan connection cables to the required
outlets on terminal block (22). To ensure the lowest
possible noise level, set the fan for the lowest pos-
sible capacity.
■
Make sure that all outdoor air devices are fully
open.
■
Set correct ventilation flows on the exhaust air
devices.
Setting the ventilation