Buderus Logamatic 4323 - Page 69

Modules and their functions
9
Logamatic 4323 - Subject to technical modifications.
69
Heating circuit and DHW function
Manual heating circuit switch (Æ Fig. 24, [1]) and DHW
(Æ Fig. 24, [2]):
Positions 0 and
3
(manual) are special settings
reserved for installers only.
Current functions are indicated by LEDs.
Fig. 24 FM441 function module
1 Manual heating circuit switch
2 Manual DHW switch
1
2
for heating circuit:
for DHW supply:
USER NOTE
The manual switch should normally be set
to "AUT".
3: The heating circuit pump or primary pump
is switched on.
The mixer is switched volt-free and can be
manually operated.
The DHW circulation pump is switched off.
AUT:
The heating circuit or the DHW circuit
operates in automatic mode.
0:
The heating circuit pump or the DHW
cylinder primary pump as well as the DHW
circulation pump are switched off.
The mixer is switched volt-free. The
control functions continue to be active.