Nibe F1245 Series Installation Manual page 61

EMPTYING THE BRINE SYSTEM
In order to service the brine system it may be easier to
drain the system first. This can be done in different ways
depending on what needs doing:
Draining the brine system in the cooling
module
If, for example, the brine pump requires replacing or the
cooling module requires servicing, drain the brine system
by:
1. Close the shut-off valves to brine system (QM33)
and (QM34).
Connect a hose to the drain valve (QM2), place the
2.
other opening of the hose in a container and open
the valve. A small amount of brine will flow into the
container.
3. Air must get into the system in order for the remain-
ing brine to run out. To let in air, slacken off the
connection slightly at the shut-off valve (QM33) that
joins the heat pump with the cooling module.
When the brine system is empty, the required service
can be carried out.
Draining the brine system in the heat pump
If the heat pump requires servicing, drain the brine sys-
tem by:
Close the shut-off valve outside the heat pump for
1.
the brine system.
2. Connect a hose to the drain valve (QM2), place the
other opening of the hose in a container and open
the valve. A small amount of brine will flow into the
container.
Air must get into the system for the remaining brine
3.
to run out. To let in air, slacken off the connection
slightly at the shut-off valve that joins the brine side
with the heat pump at connection (XL7).
When the brine system is empty, the required service
can be carried out.
HELPING THE CIRCULATION PUMP TO
START (GP1)
NOTE
Help starting the heating medium pump (GP1)
only applies to F1245 -6 at -12 kW.
1.
Turn off F1245 by setting the switch (SF1) to " ".
Remove the front cover
2.
Remove the cover for the cooling module.
3.
Loosen the venting screw (QM5) with a screwdriver.
4.
Hold a cloth around the screwdriver blade as a small
amount of water may run out.
NIBE F1245
5. Insert a screwdriver and turn the pump motor
around.
Screw in the venting screw (QM5).
6.
Start F1245 by setting the switch (SF1) to "" and
7.
check that the circulation pump is working.
It is usually easier to start the circulation pump with
F1245 running, and with the switch (SF1) set to "". If the
circulation pump is helped to start while F1245 is run-
ning, be prepared for the screwdriver to jerk when the
pump starts.
GP1
The image shows an example of what a circulation pump can look
like.
QM5
Chapter 9 | Service 61