Connecting External Safety Equipment - Viessmann Vitotronic 200 Installation And Service Instructions For Contractors

External functions
(cont.)
Function
Control unit Vitotronic control
Contact
Closed The boiler is started subject to load.
■
Open The boiler is in control mode.
■
Parameter
■
■

Connecting external safety equipment

Connection at plug .
aBÖ
Note
Plug must remain plugged in, even if no connec-
aBÖ
tion is made.
ON ON
STB N STB TR TR
A
150
Fig. 21
Jumper "STB" "STB"
A –
Low water indicator, minimum pressure limiter
B
Maximum pressure limiter
C
Further safety equipment
D
1. Remove jumper "STB"
unit
Adjust the set flow Set "42" (DE1), "43" (DE2)
■
temperature in pa- or "44" (DE3) in the "Gen-
rameter "0B" in the eral" group to 2.
"General" group. Adjust the set flow tempera-
■
Note parameter ture in parameter "0B" in
"06" in the "Boil- the "General" group.
er" group. Note parameter "06" in the
■
"Boiler" group.
P
B
P
C
D
P
"STB".
–
External demand
EA1 extension
0 to 1 V No specification for set
1 V
10 V
Note parameters "45" and "46" in
■
the "General" group.
Note parameter "06" in the "Boil-
■
er" group.
!
Please note
Live contacts lead to short circuits or phase fail-
ure.
The external connections must be potential-
free.
2. Connect the external safety equipment in series to
plug .
aBÖ
Electrical connections
boiler water temperature
or
Output control
Set value 10 °C
or
Set value 10 %
Set value 100 °C
or
Set value 100 %
31