STIEBEL ELTRON SOM 10 - Manual (Page 60)

en
60
10.1 Demands
In this menu, up to 2 heating demands can be activated
and adjusted.
Activated demands will be available for se-
lection in the relay allocation channels of the
corresponding optional functions . This way, se-
veral optional functions can demand the same
heat source.
If, for example the potential-free changeover relay
R14 is allocated to Demand 1, the selection AH-
Dem.1 will then become available in addition to the
free relays in the adjustment channels Demand of
the optional functions for the heating part of the ar-
rangement (see page 64). This way, e. g. the DHW
heating function can demand the same boiler for back-
up heating as the thermal disinfection function.
Adjustment channel Description Adjustment range / selection Factory setting
Demand 1 (2) Demand 1 (2) Activ., Deactivated Deactivated
Relay Relay selection system dependent system dependent
Heating / Demands
10.2 Heating circuits
The controller has two internal, weather-compensa-
ted heating circuits and is able to control up to 5 ex-
ternal heating circuits by means of extension modules.
In the menu appearing when New heating circuit is
selected, it is possible to choose between the internal
heating circuits and, if available, registered modules.
If one or more extension modules are connected,
they have to be registered with the controller. Only
registered modules are available in the heating circuit
selection.
Extension modules can be registered in the In-/Out-
puts / Modules menu (see page 72).
If an internal or external heating circuit has been se-
lected, a new menu opens. In this menu, all sensors and
relays required for the heating circuit can be allocated,
and all adjustments can be made.
The controller calculates the set flow temperature for
each heating circuit by means of the outdoor tempe-
rature and the selected heating curve. If the measured
flow temperature deviates from the set flow tempera-
ture, the mixer is activated in order to adjust the flow
temperature correspondingly.
If the outdoor temperature falls below the point whe-
re the calculated set flow temperature would exceed
the maximum flow temperature, the maximum flow
temperature is treated as the set temperature for as
long as the condition remains.
If the outdoor temperature sensor is defective, an
error message is indicated. For the duration of this
condition, the maximum flow temperature -5 K is as-
sumed as set flow temperature.
With the timer, the day / night operation can be ad- justed. During day phases, the set flow temperature is
increased by the adjusted day correction value, during
night phases it is decreased by the night correction
value (night setback).
Summer mode
The Mode channel adjustment determines how the
heating circuit is set to summer mode: