143
Assigning the operating program changeover
function to the heating circuits
Select the operating program changeover function for
the relevant heating circuit via coding address d8 in
the
"Heating circuit"
group at the heat generator con-
trol 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 the "External blocking" function on the
pumps
The effect on the secondary pump is selected in cod-
ing 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 secondary pump is selected in cod-
ing 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.
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
–
10 V
The 0
–
10 V hook-up provides an additional set flow
temperature:
0 to 1 V
Interpreted as "no default value for
set flow temperature".
1 V
Set value 10 °C
10 V
Set value 100 °C
Ensure galvanic separation between the earth conduc-
tor and the negative pole of the on-site power source.
Output
aBJ
The following functions can be connected to output
aBJ
:
■
Feed pump to substation
or
■
DHW circulation pump
or
■
Fault message facility
Function assignment
Select the function of output
aBJ
via coding address
"36" in the
"General"
group in the heat generator con-
trol unit.
Control functions
External operating program changeover
The "External operating program changeover" function
is implemented via the EA1 extension. There are 3
inputs available at the EA1 extension (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 operating program changeover function for
the relevant heating circuit via coding address "d8" in
the
"Heating circuit"
group at the appliance control
unit:
Heating program changeover
Code
Changeover via input DE1
d8:1
Changeover via input DE2
d8:2
Changeover via input DE3
d8:3
The direction of the operating program changeover
can be selected in coding address "d5" in the
"Heating
circuit"
group:
Function description
External extensions (accessories)
(cont.)
5678 044 GB
Functions
Summary of Contents for D2RA
Page 113: ...113 Maintenance Checking the Vitotronic 200 H accessories cont 5678 044 GB Maintenance ...
Page 133: ...133 Parts lists Sorption module hydraulics cont 5678 044 GB Components ...
Page 136: ...136 0001 0002 0003 0004 0005 Fig 83 Parts lists Miscellaneous 5678 044 GB Components ...
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