Cetetherm Midi Wall TA
Installation, service and operating instruction
18
7.2.3 Noise in the radiator system
Reason
Action
The heating pump capacity set too
high
Reduce the pump capacity
Reduce the pump capacity by selecting a lower setting on the pump
when needed.
Air in the heating pump
Vent the pump
The pump is self-venting.
Possible remaining air in the pump may cause noise. This noise
ceases after a few minutes run time.
The heating pump motor or pump
component damaged
Change pump components or the complete pump
If it is necessary to change the driving side of the pump, it can be
dismantled without removing the entire pump.
See
9.4 Change the complete heating pump or pump components
7.2.4 Heating temperature unstable
Reason
Action
Pending differential pressure
Check available differential pressure and the primary inlet
temperature
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 causes pressure
drops.
Repair any leaks on the substation.
The heating system safety valve is
leaking or does not work
Check the heating system safety valve
Check that the safety valve is not leaking and that it works properly.
Check the safety valves’ 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 systems volume changes
See
8.4 Check the volume take-up and pressure equalizing of the