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SDC / DHC Control Functions
EN2H-0221GE51 R0808 119
6.5 Switching from SDC to DHC
Language selection occurs after the controller is started. You can
then select the controller type:
• SDC (heating controller)
or
• DHC (district heating controller)
"SDC - DHC" appears on the top line. The selection option "SDC"
or "DHC" appears at the bottom right. The controller type depends
on the relay equipment or the set type/max code.
Switching is only possible with relay equipment for which DHC
types exist. This is not the case with any others.
Switching the setting is also possible via a special system
parameter.
The type code setting is identical for both versions, i.e. the type
code numbers of SDC equipment correspond to those of DHC
equipment.
Reducing a controller to a heating circuit expansion via type code
(21 or 22) functions only with a presetting to controller type SDC.
6.6 Selection of hydraulic parameter presettings
Each controller type covers a specific hydraulic diagram in its "as
supplied" condition. Depending on the configuration variants there
is also the possibility of adapting the system by means of further
parameter settings to hydraulic diagrams differing from the
standard hydraulic system.
With parameter 01 in the "Hydraulics" menu a preselection can be
made from the hydraulic schemes collection. The corresponding
inputs and outputs are assigned automatically according to the
hydraulic diagram and can be altered if necessary. The
associated system schematics are available in the hydraulic
schemes collection.
5.4 Parameter settings, Pg. 81
6.7 The variable inputs and outputs of device series SDC/DHC 43
The selected functions can be assigned only once and are then
no longer callable in other variable inputs. If an input function is
absolutely necessary for a corresponding output function with
regard to the variable outputs, no selection is possible.
See also
Variable inputs