Viessmann Vitotronic 200 Installation And Service Instructions For Contractors page 121

EA1 extension (accessories)
Analogue input 0 10 V
–
The following functions can be assigned to the 0 to
10 V input via parameter "45" in the "General" group:
■ Temperature demand
■ Output demand
Temperature demand
The 0 to 10 V hook-up provides an additional set boiler
water temperature.
This function is activated via parameter "45:00".
0 1 V "No specification for set boiler water tempera-
–
ture"
≙
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
Information on the feed pump
Function only possible in conjunction with a heating
circuit control unit connected via LON.
(cont.)
Output demand
The 0 to 10 V hook-up provides a specified boiler out-
put:
■ Function activated via parameter "45:01":
If the boiler receives a higher set output value
through other requirements, it is operated at this out-
put.
■ Function activated via parameter "45:02":
The boiler is operated at the specified output. Only
the boiler protection function (Therm-Control) is
taken into account universally.
0 1 V "No specification for boiler output"
–
1 V
10 V
Note on DHW circulation pumps
Connect DHW circulation pumps with standalone func-
tions directly to the 230 V ∼ supply.
Function assignment
The function of output
"41" in the "General" group at the boiler control unit.
Function description
≙
set value 10 %
≙
set value 100 %
is selected via parameter
aBJ
121