Hydraulic Components
SDC / DHC
220 EN2H-0221GE51
R0808
ATTENTION
No global controller function for data bus system with
several central devices.
Control modes and switching time settings are not effective when
the demand contact is activated. The respective heating circuit
only responds to requests from the demand contact.
The control modes manual, emission measurement with safety
temperature limiter check and screed function are of higher
priority.
System information
An open demand contact is signaled by the string "disable" in the
status display; a closed contact is identified by the string
"demand".
A variable input that has been defined as a demand contact acts
on the heating circuit in the following way:
•
Variable input open:
No demand
The heating circuit is switched of unconditionally (no frost
protection, no standby function).
•
Variable input short-circuited:
Demand
The heating circuit is in control mode HEATING (continuous
heating) and works according to its parameter settings.
ATTENTION
Customers must take appropriate frost protection measures
for the respective control circuit.
This function can be activated up to three times (once for each
available variable input).
Contact function
