Control Circuit (Part 2) - Viessmann Vitocal 300-G BW Installation And Service Instructions Manual

Control circuit (part 2)

A
D
A Connection, control circuit (part 1),
x
B
B Compressor relay (control unit ena-
x
C Primary pump (already integrated
x
C
D Protective motor switch, primary
E Control signal natural cooling (NC)
F Secondary pump
x
E
G Instantaneous heating water heater
H Mixer |OPEN, heating circuit with
x
F
K Mixer ~CLOSE, heating circuit with
L Heating circuit pump for heating cir-
M Cylinder primary pump / shut-off
N Control, electric immersion heater
x
G
x
H
x
K
x
L
x
M
x
N
Connection and wiring diagrams
see page 182
ble)
for type BWC/WWC)
pump (primary pump already inte-
grated in type BWC/WWC; if protec-
tive motor switch is installed, jumper
fitted at the factory, see page 181)
(stage 1)
mixer M2
mixer M2
cuit with mixer M2
valve
EHE (or cylinder reheating with
pump when using an external heat
source)
183