Substations
13
Logamatic 4323 - Subject to technical modifications.
92
13 Substations
The Logamatic 4323 control unit with ZM433 central module can be
operated with
–
Address 0 (stand-alone),
–
Address 1 (linked to a master, i.e. the control unit that provides
externally generated heat) and with
–
Address > 1 (as substation linked to other Buderus Logamatic 4000
control units)
Operation with address 0 (stand-alone) or address 1 (as master)
An external heat source, such as
–
a solid fuel boiler,
–
a solar thermal system or
–
an external boiler
supplies heat, with priority to a buffer cylinder, which contains the feed sensor.
The feed sensor measures the buffer temperature. If this exceeds the minimum
heat-up temperature, the feed pump (if installed) and other pumps will be
switched on.
Operation with address > 1 (substation)
The feed sensor is only required if the substation is physically far from
the heat source. Otherwise, the system flow temperature will be transferred
by the master control unit via the ECOCAN-BUS.
Line losses are compensated if the substation is physically far from the heat
source, by setting a boiler temperature rise against the set control unit value.
To support the other supply pumps, the feed pump may also be connected in
case of long line runs.
USER INFORMATION
If a cascade or strategy module (FM456, FM457, FM458) is fitted in the control
unit, that module will regulate the boiler system
(address 0 or 1).
z
In that case set the minimum heat-up temperature to "off".
