Safety Chain (Part 2) - Viessmann Vitocal 300-G BW Installation And Service Instructions Manual

Safety chain (part 2)

A
x
B
x
4
C
E
G
7
H
x
L
9
x
M
qP
N
5
x
D
6
x
F
x
x
8
x
K
Connection and wiring diagrams
4 - qP Terminals 4 to 10 on the 10-
pole terminal block behind the
contact shield (see page 59)
A Connection, safety chain
(part 1), see page 180
B Brine pressure limiter, poss.
frost stat, frost protection AC-
Box (for commissioning, insert
jumper from the pack supplied)
C Protective motor switch, pri-
mary pump (if installed, jumper
fitted at the factory)
D Message input, primary
source 1
E Safety high pressure switch
F Low pressure (jumper fitted at
the factory)
G Control high pressure (jumper
fitted at the factory)
H Protective motor relay, com-
pressor (after the protective
motor switch has responded,
also check the thermal breaker
on the soft starter or the sepa-
rate protective motor switch of
the compressor, if installed)
K Message input, protective
motor switch, compressor 1
L Compressor relay (control unit
enable)
M Switching contact on the con-
trol unit of the electronic expan-
sion valve (EEV)
N Compressor contactor
181