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

Control circuit (part 1)

Connection and wiring diagrams
Note
The total output of all connected appli-
ances must not exceed 1000 W. If the
total output 1000 W, the individual
rating of a component can be greater
than specified.
A Connection, safety chain (part 1),
see page 185
B Switched phase
C Control of external heat source
D Instantaneous heating water hea-
ter control (stage 2)
E Control module, instantaneous
heating water heater (see
page 74)
F Control signal Active cooling (AC)
G Mixer |OPEN, external heat
source
H Mixer ~CLOSE, external heat
source
K Heating circuit pump, direct heat-
ing circuit A1
L Circulation pump for cylinder
heating
M Auxiliary output with switching
times (e.g. DHW circulation pump)
N Central fault message
O Connection, control circuit
(part 2), see page 188
187