Control Functions; External Heating Program Changeover - Viessmann VITODENS 200-W Installation And Service Instructions Manual

Function description
External extensions (accessories)
Assigning the operating program changeover
function to the heating circuits
Select the operating program changeover function for
the respective heating circuit via coding address d8 in
the "Heating circuit" group at the boiler control unit:
Changeover via input DE1: Code d8:1
■
Changeover via input DE2: Code d8:2
■
■ Changeover via input DE3: Code d8:3
The effect of the operating program changeover is
selected via coding address d5 in the "Heating cir-
cuit" group.
The duration of the changeover is set via coding
address F2 in the "Heating circuit" group.
Effect of external blocking function on the pumps
The effect on the internal circulation pump is selected
in coding address 3E in the "General" group.
The effect on the relevant heating circuit pump is
selected in coding address d6 in the "Heating circuit"
group.
The effect on a circulation pump for cylinder heating is
selected in coding address 5E in the "DHW" group.
Effect of the external demand function on the
pumps
The effect on the internal circulation pump is selected
in coding address 3F in the "General" group.
The effect on the relevant heating circuit pump is
selected in coding address d7 in the "Heating circuit"
group.
The effect on a circulation pump for cylinder heating is
selected in coding address 5F in the "DHW" group.

Control functions

External heating program changeover

The "External heating program changeover" function is
connected via extension EA1. There are 3 inputs avail-
able at extension EA1 (DE1 to DE3).
Heating program - changeover
Input DE1
Input DE2
Input DE3
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:
120
(cont.)
DHW circulation pump runtime for brief operation
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.
Analogue input 0
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".
≙
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 connected to output
:
aBJ
■ Feed pump to substation
or
DHW circulation pump
■
or
■ Fault message facility
Information regarding the feed pump
Function only possible in conjunction with a heating
circuit control unit connected via LON.
Function assignment
Select the function of output
"36" in the "General" group at the boiler control unit.
The function is selected via the following coding
addresses in the "General" group:
10 V
–
via coding address
aBJ
Code
3A:1
3b:1
3C:1