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Operation in the event of a fault
12
Logamatic 4321/4322 - Subject to technical modifications.
77
12.2 Heating with manual override
For emergency operation, switches are provided on the
control unit and on the modules. In position
3
each
pump is activated. The mixers stay at zero volts and
should be manually adjusted.
Before making any adjustments for manual mode check
the settings on the various modules for possibly
incorrect settings.
If the control system indicates a fault you may
temporarily run your heating system manually.
z To safeguard DHW heating in the event of a fault, set
the module switches (Æ Fig. 26) to
3
.
z Set the boiler water thermostat (Æ Fig. 26) to
60 °C – 90 °C; if DHW heating fails to 60 °C.
z Set burner emergency switch to
W
. Burner stage 1
will always be directly controlled. The setting for
burner stage 2 must be made using the switch on the
module.
z Set the control unit ON/OFF switch to
R.
Fig. 26 Heating with manual override
1 Module switch
2 Boiler water thermostat
3 Burner emergency operation switch
4 ON/OFF switch
77


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