Cetetherm Midi Wall IQHeat
Installation, service and operating instruction
30
11.2 Change the heating and hot water actuator
Maintenance work must be carried out by an authorized service technician.
Disconnecting the power feed to the pump and the substation.
1. Open actuator lid and unscrew connecting wires attached
to the wire terminal (Picture 38).
2. Unscrew the brace attaching the actuator to the valve and
lift of the actuator.
3. Mount a new actuator on the valve, slide the actuator onto
the valve neck, thus making the square nut on the valve
spindle fit into the groove on the cross bar. Then slide the
brace into the groove on the valve neck and secure the
nuts.
4. Reattach the wire terminal per the
Picture 22
11.3 Change the heating or hot water valve
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. Unscrew the heating actuator from the control valve.
2. Use a wrench to remove the control valve. Note the arrow
direction on the valve.
3. Mount a new valve;
and take especially care to the arrow
direction
.
4. Mount the actuator on the valve, slide the actuator onto the
valve neck, thus making the square nut on the valve spindle
fit into the groove on the cross bar. Then slide the brace into
the groove on the valve neck and secure the nuts.
Picture 23
Summary of Contents for Midi Wall IQHeat
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