Operating instructions

148
Analogue input 0 – 10 V
The 0 – 10 V hook-up provides an addi-
tional set boiler water temperature:
0 – 1 V is taken as "no default for set
boiler water temperature".
1 V
≙ Set value 10 °C
10 V
≙ Set value 100 °C
Ensure DC separation between the earth
conductor and the negative pole of the
on-site voltage source.
Output aBJ
The following functions can be connec-
ted to output
aBJ
:
■ Feed pump to substation
or
■ DHW circulation pump
or
■ Fault message facility
Function assignment
Select the function of output
aBJ
via cod-
ing address "36" in the "General" group
at the boiler control unit.
Control functions
External heating program changeover
The "External heating program change-
over" function is connected via extension
EA1. There are 3 inputs available at
extension EA1 (DE1 to DE3).
The function is selected via the following
coding addresses in the "General"
group:
Heating program - changeover Code
Input DE1 3A:1
Input DE2 3b:1
Input DE3 3C:1
Assign the operating program change-
over function for the relevant heating cir-
cuit via coding address "d8" in group
"Heating circuit" at the boiler control
unit:
Heating program - changeover Code
Changeover via input DE1 d8:1
Changeover via input DE2 d8:2
Changeover via input DE3 d8:3
Function description
External extensions (accessories)
(cont.)
5772 909 GB