144
Heating program changeover
Code
Changeover towards "Permanently re-
duced" or "Permanent standby mode"
(according to the selected set value)
d5:0
Changeover towards "Continuous heat-
ing mode"
d5:1
The duration of the operating program changeover is
set in coding address "F2" in the
"Heating circuit"
group:
Heating program changeover
Code
No operating program changeover
F2:0
Duration of the operating program
changeover 1 to 12 h
F2:1 to
F2:12
The operating program changeover stays enabled for
as long as the contact remains closed, but at least as
long as the duration selected in coding address "F2".
External blocking
The functions "External blocking" and "External block-
ing with fault message input" are 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:
External blocking
Code
Input DE1
3A:3
Input DE2
3b:3
Input DE3
3C:3
External blocking and fault message
input
Code
Input DE1
3A:4
Input DE2
3b:4
Input DE3
3C:4
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 cir-
cuit"
group.
External demand
The "External demand" 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:
External demand
Code
Input DE1
3A:2
Input DE2
3b:2
Input DE3
3C:2
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 cir-
cuit"
group.
The minimum set flow temperature for external
demand is selected in coding address "9b" in the
"General"
group.
Process circuit filling and venting program
The process circuit is separated from the secondary
circuit by means of a plate heat exchanger, and must
be filled and vented separately.
The manner of flow through the process circuit differs
depending on the control valve setting.
To fill and completely vent the process circuit, the low
temperature process pump, control valve and high
temperature process pump are activated every 90 s in
the process circuit filling and venting program for
approx. 15 min. During the program, the process cir-
cuit must be flushed via the fill valve (see page 42).
Filling program for the secondary circuit
In the delivered condition, the diverter valve is set to its
central position, enabling the system to be filled com-
pletely. After the control unit has been switched on, the
diverter valve no longer goes into its central position.
Afterwards, the diverter valve can be moved into the
central position via the filling function (see "Filling the
heating system"). In this position, the control unit can
be switched off and the system can be filled com-
pletely.
Function description
Control functions
(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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