Cetetherm Midi Wall IQHeat
Installation, service and operating instruction
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11
Maintenance and repairs
Maintenance work must be carried out by an authorized service technician.
11.1 Change the pumps
Either change the complete pump or just the pump motor.
Maintenance work must be carried out by an authorized service technician.
Disconnecting the power feed to the pump and the substation.
Before starting out repairs always close the primary supply and return shutoff valves and drain
the system.
After finishing repair; open the shutoff valves. Start with primary supply and then the return lines,
to avoid pollutions in the system. Open the valves slowly to avoid pressure surges.
Do the same on the heating side open first heat return and then supply. Fill up the system, start
the pump and vent.
1. Release the brass nuts with a wrench and replace the pump.
2. Reattach the power feed.
3. If only changing the motor, release it by unscrewing four socket
head cap screws and replace the motor.
4. Reattach the power feed.
Picture 21
