158
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.)
5773 216 GB
Summary of Contents for Vitodens 222-F B2TA series
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Page 13: ...13 1 2 SW17 Installing the boiler Siting and levelling the boiler 5773 216 GB Installation...
Page 31: ...31 4 1 5 2 2x 3 Installing the boiler Fitting the front panels 5773 216 GB Installation...
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