Draining the heating medium side in the cooling
module
If, for example, the heating medium pump requires repla-
cing or the cooling module requires servicing, drain the
heating medium side as follows:
1.
Close the shut-off valve for the heating medium side
(QM32).
2.
Connect a hose to the bleed valve (QM1) and open
the valve. Some liquid will run out.
3.
Air must get into the system for the remaining liquid
to run out. Do this by slightly slackening off the
connection at the shut-off valve (QM32) that joins
the heat pump to the cooling module.
When the heating medium side is drained, the required
service can be performed and/or replacement of any
components carried out.
Draining the heating medium system in the heat
pump
If the heat pump requires servicing, drain the heating
medium side as follows:
1.
Close the shut-off valves outside the heat pump for
the heating medium side (return and flow line).
2.
Connect a hose to the bleed valve (QM1) and open
the valve. Some liquid will run out.
3.
Air must get into the system for the remaining liquid
to run out. Do this by slightly slackening off the
connection at the shut-off valve that joins the climate
system and the heat pump at the connection (XL2).
When the heating medium side is empty the requisite
service can be carried out.
Draining the entire climate system
If the entire climate system requires draining, do this as
follows:
1.
Connect a hose to the bleed valve (QM1) and open
the valve. Some liquid will run out.
2.
Air must get into the system for the remaining liquid
to run out. This is done by unscrewing the bleed
screw on the highest radiator in the house.
When the climate system is empty the requisite service
can be carried out.
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).
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.
3.
Air must get into the system for the remaining brine
to run out. Do this by slightly slackening off the
connection at the shut-off valve (QM33) that joins
the heat pump with the cooling module.
When the brine side is empty the requisite service can be
carried out.
Draining the brine system in the heat pump
If the heat pump requires servicing, drain the brine system
by:
1.
Close the shut-off valve outside the heat pump for
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.
3.
Air must get into the system for the remaining brine
to run out. Do this by slightly slackening off the
connection at the shut-off valve that joins the brine
side and the heat pump at the connection (XL7).
When the brine side is empty the requisite service can be
carried out.
Helping the circulation pump to start (GP1)
NOTE
Help starting the heating medium pump (GP1)
only applies to F1245 -5 to -12 kW.
1.
Shut off F1245 by setting the switch (SF1) to " ".
2.
Open the service cover.
3.
Remove the cover for the cooling module.
4.
Loosen the venting screw (QM5) with a screwdriver.
Hold a cloth around the screwdriver blade as a small
amount of water may run out.
5.
Insert a screwdriver and turn the pump motor
around.
6.
Screw in the venting screw (QM5).
7.
Start F1245 by setting the switch (SF1) to "" and
check whether the circulation pump works.
It is usually easier to start the circulation pump with F1245
running, switch (SF1) set to "
". Helping the circulation
pump to start is performed with F1245 running, be pre-
pared for the screwdriver to jerk when the pump starts.
NIBE™ F1245Chapter 9 | Service68
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