Safety Chain (Part 1) - Viessmann Vitocal 300-G BW Installation And Service Instructions Manual

Connection and wiring diagrams

Safety chain (part 1)

A
x x
x
x
x
x
x x
x
x
K
M
180
x
x
x
1
B
x
C
x
x
x
D
x
x
x
E
x
x
x
F
x
x
x
G
x
x
H
= x
x
L
= x
1 Terminal 1 on the 10-pole terminal
block behind the contact shield (see
page 59)
A Power supply
B Connection, control circuit (part 1),
see page 182
C External demand
D Fault message, lag heat source
E Flow switch
F External blocking
G Power-OFF
H Message input, power-OFF
K Switching contact, three phase
monitor
L Message input, three phase monitor
M Connection, safety chain (part 2),
see page 181