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Operation in the event of a fault
12
Logamatic 4121, 4122 and 4126 - Subject to technical modifications.
82
12.2 Manual mode Logamatic 4121
Before making any adjustments for manual mode, check
the individual modules for any settings which may be
incorrect. If the control system indicates a fault you may
temporarily run your heating system manually.
z Switch on the control unit via the ON/OFF switch
(Æ
Fig. 25, [1]).
z Set heating circuit 1 (poss. + DHW) (Æ Fig. 25, [3])
at selector switch
w
to manual 3 or ~.
z Set heating circuit (Æ Fig. 25, [2]) at selector switch
B
to manual 3.
z Set boiler water thermostat on the boiler to the
required temperature.
z Switch on "Flue gas test" switch Q on the wall
mounted boiler.
In case of faults, immediately notify your local heating
contractor, who will provide a professional service.
Notify your contractor of the faults displayed on the
MEC, or the fault code on the boiler.
Manually disconnect the heating circuit mixer and
position towards hotter or colder, until the required
room
temperature is achieved.
Fig. 25 Logamatic 4121
20
25
15
+
B
3
2
1
WARNING!
RISK OF SCALDING
The DHW temperature can be set to
a
maximum of 80 °C. Settings higher than
60 °C create a risk of scalding at the draw-
off points.
z Ask your local heating contractor about
the maximum set DHW temperature
and/or check it yourself. The DHW
temperature is set via the thermostat of
the wall mounted boiler.
CAUTION!
SYSTEM DAMAGE
through closed mixer circuits.
z To ensure operational reliability, mixer
circuits must not be fully closed.
82


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