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

Safety chain (part 1)

Connection and wiring diagrams
1 Terminal 1 on the 10-pole terminal
block behind the contact shield
(see page 61)
A Power supply
B Connection, control circuit
(part 1), see page 187
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 moni-
tor
M Connection, safety chain (part 2),
see page 186
185