Analogue Input 0; Output Abj - Viessmann VITOTRONIC 200 Installation And Service Instructions Manual

Components
EA1 extension, part no. 7452 091
Input function assignment
Select the input functions by means of the following
codes in the "General" group at the boiler control unit:
■ DE1: Coding address "3A"
DE2: Coding address "3b"
■
DE3: Coding address "3C"
■
Assigning the operating program changeover
function to the heating circuits
The assignment of the operating program changeover
to the relevant heating circuit is specified via coding
address "d8" in the "Heating circuit..." group:
■ Code "d8:1": Changeover via input DE1
■ Code "d8:2": Changeover via input DE2
■ Code "d8:3": Changeover via input DE3
The effect of the operating program changeover is
selected via coding address "d5" in the "Heating cir-
cuit..." group.

Analogue input 0

10 V
–
The 0 10 V hook-up provides an additional set boiler
–
water temperature:
0 1 V is taken as "no set boiler water temperature
–
default".
Note
Ensure DC separation between the earth conductor
and the negative pole of the on-site voltage source.
Output
aBJ
Central fault message facility connection (code "36:0"
in the "General" group)
92
(cont.)
Duration of the operating program changeover
The changeover only occurs for as long as the switch-
ing contact is closed.
If the operating program changeover is activated by
closing the contact with a button, set the duration of
the operating program changeover in coding address
"F2".
DHW circulation pump runtime for brief operation
The DHW circulation pump can also be started outside
the enable times set in the time program.
The DHW circulation pump is started by closing the
contact at DE1, DE2 or DE3 by means of a pushbut-
ton. The runtime is adjusted via coding address "3d" in
the "General" group.
Coding address "1E" in the "General" group:
≙
■ "1E:0" temperature demand adjustable, ranging
from 0 to 100 °C
≙
1 V 10 °C set value change
≙
10 V 100 °C set value change
≙
■ "1E:1" temperature demand adjustable, ranging
from 30 to 120 °C
≙
1 V 30 °C set value change
≙
10 V 120 °C set value change