Viessmann Vitotronic 200 Installation And Service Instructions For Contractors page 119

Plug-in adaptor for external safety equipment...
B
D
150
E
X7
Ein
TR
Ein
TR
STB
N
STB
X6 X4
6 5 4 3 2 1 6 5 4 3 2 1
H
Fig. 50
A Wiring chamber (lower section of the plug-in adap-
tor)
External safety equipment
B
X1 Additional high limit safety cut-out
or
Temperature limiter
X2 Minimum or maximum pressure limiter
X3 Maximum pressure limiter
X7 Low water indicator
or
Plug of a second plug-in adaptor
aBÖ
External burner start (stage 1/base load)
C
Observe the order of the connections shown in the
diagram.
Remove the jumper in plug
external safety equipment.
Connecting 2 plug-in adaptors
Separate installation instructions
Make the connections in plug-in adaptor 1as described
in the previous chapter.
In plug-in adaptor 2, the connections can be made in
any order.
B B
D D
150 150
E E
X3 X2
Ein Ein
TR TR
Ein Ein
TR TR
STB STB
N N
STB STB
X5
G
when connecting the
aBÖ
(cont.)
B
C
X8
150
F
X1
Ein
TR
Ein
TR
STB
N
STB
A
D Controlled external shutdown
Plug
E aBÖ
Plug of the control unit
F aBÖ
Connection for cable with plug
G
unit
To the control panel or to the alarm equipment
H
Note
A plug must be inserted into every socket "X1",
aBÖ
"X2", "X3" and "X7".
Rotary selector setting
The rotary selector is located in the upper part of the
plug-in adaptor.
Delivered condition: Position 1
Plug-in adaptor 1: Position 1
Plug-in adaptor 2: Position 2
Function description
to the control
aBÖ
119