Cetetherm Midi Wall IQHeat, Installation, Service And Operating Instruction

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Cetetherm Midi Wall IQHeat
Installation, service and operating instruction
24
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.
Heating supply temperature sensor
and outdoor temperature sensor does
not work Check the heating supply temperature sensor and outdoor
temperature sensor for correct placement and function
.
The two temperatures can be monitored on the control panel display,
see document
User instruction IQHeat Doc-1552 chapter General
Functions section Reading the current temperatures and valve modes .
Loss of function in the heating control
unit. See 10.5 Run the pump manually .
Heating circuit strainer clogged See 10.3 Check heating circuit strainer .
9.2.3 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 chapter 11 Maintenance and repairs .
9.2.4 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.
Heating supply temperature sensor
and outdoor temperature sensor does
not work Check the heating supply temperature sensor and outdoor
temperature sensor for correct placement and function
.
The two temperatures can be monitored on the control panel display,
see document
User instruction IQHeat Doc-1552 chapter General
Functions section Reading the current temperatures and valve modes.
District heating strainer clogged See 10.1 Check if the district heating strainer is blocked .
9.2.5 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 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 10.6 Check the volume take-up and pressure equalizing of the
expansion vessel.