Cetetherm Midi Wall TA, Installation, Service And Operating Instruction

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Cetetherm Midi Wall TA
Installation, service and operating instruction
16
7 Service instructions
To avoid the risk of scalding, make sure that no-one draws any water while servicing the
substation.
Grey marked service actions must be carried out by an authorized service technician.
NOTE: Make sure that the Midi Wall substation has been correctly installed.
7.1 Tap water, service instructions
7.1.1 Tap water too cold
Reason Action
District heating supply too low Check 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
.
Hot water valve and/or actuator does
not work
See
8.1 Check the function of the hot water valve and actuator.
.
7.1.2 Tap water too warm
Reason Action
Hot water valve and/or actuator does
not work
See 8.1 Check the function of the hot water valve and actuator .
7.1.3 Hot water 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.
Faulting settings for drain hot water
Check pre-set parameters on control panel display
Check set value for drain hot water.
DHWC pump is not running Check that the electrical power is on.
See
8.3 Check DHWC pump.
District heating strainer clogged See
9.1 Cleaning the district heating strainer.