Cetetherm Midi Wall IQHeat
Installation, service and operating instruction
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10.5 Run the pump manually
If it becomes necessary to run the pump and actuator manually, this can
be done by disconnecting the power to the operator control panel.
Disconnect the electrical plug for the pump and connect the
replacement cable to the power supply and to the circulation pump.
Next, open the heating valve manually using the red knob on the
actuator.
Flick down the red knob and open the valve enough to supply the house
property´s heating demand. This is to be regarded as a temporary
solution until the control unit problem is solved.
Picture 20
10.6 Check the volume take-up and pressure equalizing of the expansion vessel
Check the expansion vessel for possible leakage.
The cause may be that the expansion vessel cannot manage the volume changes on the heating side.
See
11.6 Change the expansion vessel
Alternatively, the system´s total volume of water may be too high, i.e. the volume changes are too large for the
expansion vessel. If so, add extra expansion volume.
