Control Circuit (Part 1) - Viessmann Vitocal 300-G BW Installation And Service Instructions Manual

Connection and wiring diagrams

Control circuit (part 1)

A
x
x
E
O
182
x
B
x
C
x
x
D
x
F
x
G
x
H
x
K
x
L
x
M
x
N
x
Note
The total output of all connected appli-
ances must not exceed 1000 W. If the
≤ 1000 W, the individual rat-
total output
ing of a component can be greater than
specified.
A Connection, safety chain (part 1),
see page 180
B Switched phase
C Control of external heat source
D Instantaneous heating water heater
control (stage 2)
E Control module, instantaneous
heating water heater (see page 72)
F Control signal Active cooling (AC)
G Mixer |OPEN, external heat
source
H Mixer ~CLOSE, external heat
source
K Heating circuit pump, direct heating
circuit A1
L Circulation pump for cylinder heat-
ing
M Auxiliary output with switching times
(e.g. DHW circulation pump)
N Central fault message
O Connection, control circuit (part 2),
see page 183