Viessmann Series B2HA 40, Инструкция по установке и обслуживанию

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Analogue input 0 - 10 V
The 0 - 10 V hook-up provides an addi-
tional set boiler water temperature:
0 - 1 V 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
Select the heating program changeover
function for the respective heating circuit
via coding address "d8" in the
"Heating
circuit" group 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.)
5623 520 GB