Cetetherm Midi Compact TA
Installation, service and operating instruction
28
Picture 22
4. 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
5. Remove the actuator lid an attach the wirings.
6. Raise the operation handle on the actuator to start the motor.
Picture 23
9.6 Change the heating or hot water valve
Maintenance work must be carried out by an authorized service technician.
Disconnecting the power supply 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 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;
take special with care the arrow direction
.
4. Reattach the actuator.
Picture 24
9.7 Change the expansion vessel
Maintenance work must be carried out by an authorized service technician.
Disconnect the power supply to the pump and the substation.
1. Close the shutoff valves for the radiator supply and return.
2. Replace the expansion vessel.
