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Operation SDC / DHC
38 EN2H-0221GE51 R0808
Information Display Condition Remarks
Return
temperature
Setpoint/Actual
value
Return sensor
connected and one of
the functions for return
increase is active
Connection of return sensor
to associated variable input
1 or 2, VI can no longer be
called up
Flow sensor of
district heating
valve VF1
Setpoint/Actual
value
With district heating
controllers
Return sensor of
district heating
valve VFB
Setpoint/Actual
value
With district heating
controllers
External heat
generator disable
Disabled mode
ON/OFF
External heat generator
disable (VI1-VI3)
specified
External contact to variable
input VI1, VI2 or VI3
Flue gas
temperature
Limit signal
value/Actual
value
Variable input
configured as AGF
Connection only to variable
input VI1
Water heater
temperature (1)
Setpoint/Actual
value
If hot-water circuit is
present
Code 1 only appears if SF2
is present
Water heater
temperature (2)
Setpoint/Actual
value
Variable input
configured as SF2
Connection to variable input
VI1, VI2 or VI3
Water heater
temperature
controller
Load condition
ON/OFF
Thermostat mode Thermostat instead of sensor
(SF1 only)
Demand via
switching contact
(VI1)
Demand
ON/OFF
VI configured as
demand contact
External contact to variable
input VI1, VI2 or VI3
Demand via
switching contact
(VI2)
Demand
ON/OFF
VI configured as
demand contact
External contact to variable
input VI1, VI2 or VI3
Demand via
switching contact
(VI3)
Demand
ON/OFF
VI configured as
demand contact
External contact to variable
input VI1, VI2 or VI3
Mixed heating
circuit 1 flow
temperature
Setpoint/Actual
value
Mixed heating circuit 1
specified
Mixed heating
circuit 1 return
temperature
Actual value Return temperature with
return maximum limit