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SDC / DHC Hydraulic Components
EN2H-0221GE51 R0808 195
switch-on and switch-off times. The hot-water circulation pump is
in operation during the heating or hot-water cycles of the selected
circuit and program.
If operation of the time programs P2 and P3 were not enabled
(see "System Parameters" menu, time program parameter) and
the circulation pump is assigned to one of these programs, the
pump will operate according to the stored default times. The same
applies if a switching-time program was selected that does not
exist for the controller type in use (e.g. an MC2 for SDC 9-21).
Hot-water parameter 16 allows switching off of the circulation
pump during hot-water loading.
7.3.5.2.1 Electrical heating element (ELH)
The function indirectly controls (via circuit breaker) an electrical
insert in the water heater if the automatic summer switch-off is
active.
Switch-off of the electrical heating element occurs via an
additional hot-water circuit thermostat to be created with the
corresponding safety equipment.
NOTE
Circulation pump with
district heating
Function