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Operation in the event of a fault
12
Logamatic 4321/4322 - Subject to technical modifications.
78
Tab. 5 Settings for emergency operation
Manually de-couple the heating circuit mixer and
position towards "Open" or "Closed" (prevent re-
engagement) until the required room temperature has
been achieved. To prevent the DHW freezing inside the
heating system, never close the heating circuit mixer.
In case of faults, immediately notify your local heating
contractor who will guarantee a professional service.
It would be helpful for your local heating contractor if you
could provide precise details about the fault.
Fault Settings for emergency operation
ON/OFF switch
on the
Logamatic 4321
Switch
Manual mode
Boiler circuit
ZM434 module
Switch
DHW manual
mode
FM441 module
Boiler water
thermostat on
the Logamatic
4321
Manual mode
switch, heating
circuit module
FM441/FM442
Central heating failed
Heating circuits failed
R AUT AUT 60 – 90 °C 3
DHW heating failed; heating circuits
are supplied normally
R AUT 3 60 °C AUT
Boiler operation failed R 3 AUT 90 °C AUT
78


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