Cetetherm Midi Compact TA
Installation, service and operating instruction
21
7.2.4 Heating temperature unstable
Reason
Action
Alternating pressure on primary side
Check available differential pressure and temperature at the
district heating medium supply
The temperature can be checked by means of the energy meter,
minimum 65ºC, or at the district heating medium supply.
District heating strainer clogged
See
9.1 Cleaning the district heating strainer
7.2.5 Heating system often needs topping up
Reason
Action
Leaks in the substation or in the system
Check the substation and the system for leaks
Leaks from the substation or the heating system cause pressure
drop.
Contact your service technician if finding any leaks.
The heating system safety valve is
leaking or does not work
Check the heating system safety valve
Check that the heating system safety valve is not leaking and that
it works properly. Check the function by turning the wheel/knob
until water runs out of the valve’s waste pipe and then close the
valve quickly.
The expansion vessel cannot handle
the changes in the system
See
8.4 Check the volume take-up and pressure equalizing of the
