Cetetherm Mini Plus CM737
Installation, service and operating instruction
37
16
Service actions for the installer
16.1 Check the function of the valve for hot water
Service actions must be carried out by an authorized service technician.
Close the shutoff valves for the
DH supply
and
DH return
together with the
cold
and
hot wate
r.
After finishing repair; open the shutoff valves. Start with
DH supply
and then the
return
line, to
avoid pollutions in the system. Open the valves slowly to avoid pressure surges.
1. Disconnect the power feed to the substation.
2. Close the shut-off valves.
3. Unscrew the tap water actuator from the control valve.
Picture 19
4.
Carefully press the valve’s spindle with a tool and check the valve’s travel
and spring back.
NOTE: The valve may be very hot!
Picture 20
5. Turn the handle on the actuator; a small dip should move in and out. If the dip does not move the
actuator is damaged and requires replacing.
6. Connect the power feed to the substation.
7. Open the shutoff valves.
