Viessmann Vitoligno 300-C Installation And Service Instructions For Contractors page 122

Connection and wiring diagram
Connection and wiring diagram
N
PE
L
STB
PE
N
STB
L
LHS
NHS
1
PE
2
1
PE
2
L
M
PE
1 ~
N
1
MAX
2
250VAC/5A
3
1
MAX
2
250VAC/5A
3
L
M
PE
1 ~
N
Fig. 77 Diagram rotated by 90°
Boiler circuit pump
sL
Power supply 230 V, 50 Hz
fÖ
A Central fault message
gÖ
Ignition
gF
jL Enable, additional heat generator
Cleaning, secondary heating surfaces
kS
Flue gas fan
a-Ö
122
(cont.)
1 2 PE N 1 2 PE N 1 2 PE N
Y1Y2 PE
Y1Y2 PE N N
aBÖ
aBS
aBD
a;A
a;S
s-Ö
1 2 PE N
M
1 ~
High limit safety cut-out and mains isolator
Low water indicator
Water pressure switch
Reserve
Boiler valve
Connection to PCB HKK 2.01