Nibe F1155 Series Installer Manual page 54

12 kW
GP1
GP2
QM2
QM1
XL1
FD1-BT30
QM31
QM34
Draining the water heater (if docked)
The siphon principle is used to empty the hot 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.
Cleaning the water heater (if docked)
To clean the water heater, remove the upper panel and
the insulation. Then open the flange for easy access.
54 Chapter 9 | Service
XL9 XL2
XL6 XL7
SF1
QM33
QM32
Draining the climate system
In order to carry out service on the climate system, it may
be easier to drain the system first. This can be done in
different ways depending on what needs doing:
NOTE
There may be some hot water when draining
the heating medium side/climate system. There
is a risk of scalding.
Draining the heating medium side in the cooling
module
If, for example, the heating medium pump requires re-
placing or the cooling module requires servicing, drain
the heating medium side as follows:
1. Close the shut-off valves to heating medium side
(QM31) and (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. To let in air, slacken off the connection
slightly at the shut-off valve (QM32) that joins the
heat pump with the cooling module.
When the heating medium side is empty, the required
service can be carried out and/or replacement of any
components carried out.
Draining the heating medium system in the heat
pump
If F1155 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. To let in air, slacken off the connection
slightly at the shut-off valve that joins the heat pump
with the cooling module (XL2).
When the heating medium side is empty, the required
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. To allow air in, unscrew the bleed screw
on the highest radiator in the house.
When the climate system is empty, the required service
can be carried out.
XL1
XL6
FD1-BT30
QM34
QM31
NIBE F1155
XL9 XL2
XL7
F1255