8
Set flow temperature for external
demand
■ Select the set flow temperature in
coding address 9b.
Connecting digital inputs (group C)
Function assignment of inputs DE1 to DE3
Input functions are permanently
assigned for the Vitotronic 200, type
WO1C. See the following table:
Input Function
DE1 Swimming pool heating de-
mand
DE2 External blocking
DE3 External demand/external
changeover of operating
status
External contacts must be potential-
free. When connecting external con-
tacts, observe the requirements of pro-
tection class II, i.e. 8.0 mm air and
creep path or 2.0 mm insulation thick-
ness to live parts.
Further details:
Vitotronic 200, type WO1C serv-
ice instructions
Connecting digital inputs (group D)
The following functions can alterna-
tively be connected:
■ External operating program change-
over for each heating circuit
■ External blocking
■ External blocking with central fault
message input
■ External demand with set flow tem-
perature
■ Central fault message
■ Brief operation of the DHW circula-
tion pump
This function is enabled when the input
is closed.
External contacts must be potential-
free. When connecting external con-
tacts, observe the requirements of pro-
tection class II, i.e. 8.0 mm air and
creep path or 2.0 mm insulation thick-
ness to live parts.
Connecting digital inputs (groups A and B)
(cont.)
5443233
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