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.
HELPING THE CIRCULATION PUMP TO START
The circulation pump in S1156 has an automatic start help
function. If necessary the pump can be started manually.
In such cases, take the following action:
1. Shut off S1156.
2. Remove the front cover
3. Press in the screw for start help using a screwdriver as
illustrated.
4. With the screw pressed in, turn the screwdriver in any
direction.
5. Start S1156 and check that the circulation pump is
working.
The image shows an example of what a circulation pump can look like.
TEMPERATURE SENSOR DATA
Voltage (VDC)Resistance (kOhm)Temperature (°C)
3.04756.20-10
2.88933.020
2.67320.0210
2.39912.5120
2.0838.04530
1.7525.30640
1.4263.58350
1.1362.46760
0.8911.73970
0.6911.24680
REMOVE THE MOTOR ON THE SHUTTLE VALVE
The motor on the shuttle valve can be removed to facilitate
servicing.
• Disconnect the cable from the motor and remove the
motor from the shuttle valve as illustrated.
PULLING OUT THE COOLING MODULE
The cooling module can be pulled out for service and trans-
port. The images show examples of what a cooling module
might look like.
NIBE S1156Chapter 10 | Service64
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