Table of Contents
Advertisement
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 S1256PC requires servicing, drain the climate system as
follows:
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.
58
Chapter 10 | Service
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 depend-
ing 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 (EP14-QM33)
and (EP14-QM34).
2.
Connect a hose to the drain valve (QM2), place the other
opening of the hose in a vessel and open the valve. A
small amount of brine will flow into the vessel.
3. Air must get into the system in order for the remaining
brine to run out. To let in air, slacken off the connection
slightly at the shut-off valve (EP14-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 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 vessel and open the valve. A
small amount of brine will flow into the vessel.
3. Air must enter the system to allow the remaining brine
to run out. To let in air, loosen the connection slightly
at the shut-off valve that joins the brine side with the
heat pump by the connection (XL7).
When the brine system is empty, the required service can
be carried out.
NIBE S1256PC
Advertisement
Table of Contents
