Nibe S1156 - Draining Climate System; Draining Cooling Module Climate System; Draining Heat Pump Climate System; Draining Entire Climate System

• The compressor and the brine pump are off and only the
heating medium pump and the electric additional heat are
active. Max output for the immersion heater in emergency
mode, limited according to the setting in menu 7.1.8.2 -
"Emergency mode".
UN
GP2
QM2 QM1
GP1
The image shows an example of how a cooling module can appear.
UN
EP14-QM34
EP14-QM31
EP14-QM32
EP14-QM33
SF1
XL7
XL2
The image shows an example of a heat pump.
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 differ-
ent ways depending on what needs doing:
NOTE
There may be some hot water, risk of scalding.
Draining the climate system in the cooling
module
If, for example, the heating medium pump needs to be re-
placed or the cooling module needs to be serviced in some
other way, drain the climate system as follows:
1. Close the shut-off valves to the climate system (EP14-
QM31) and (EP14-QM32).
2. Connect a hose to the drain valve (QM1) and open the
valve. Some liquid will run out.
3. Air must enter the system to allow the remaining liquid
to run out. To let in air, loosen the connection slightly
at the shut-off valve (EP14-QM32) that joins the heat
pump with the cooling module.
When the climate system is empty, the required service can
be carried out and/or any components can be replaced.
Draining the climate system in the heat pump
If S1156 requires servicing, drain the climate system as fol-
lows:
1. Close the shut-off valves outside the heat pump for the
climate system (return and supply line).
2. Connect a hose to the drain valve (QM1) and open the
valve. Some liquid will run out.
3. Air must enter the system to allow the remaining liquid
to run out. To let in air, loosen the connection slightly
at the shut-off valve that joins the climate system and
the heat pump by the connection (XL2).
When the climate system 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 drain 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.
63Chapter 10 | ServiceNIBE S1156