Viessmann VITOCAL 300-G Installation And Service Instructions Manual page 224

Connection and wiring diagrams
Overview of the PCBs and connection options
Plug Terminals Function
sXF 224.2
224.3
224.4
224.5
224.6
224.7
sXG 225.1
225.2
225.3
224
Primary pump for heat
pump stage 2
(type BWS)
Secondary pump for
heat pump stage 2
(type BWS)
Control of instantane-
ous heating water
heater, stage 2
Circulation pump for
cylinder heating (heat-
ing water side) for heat
pump stage 2
(type BWS)
Cylinder primary pump
(DHW side), two-way
shut-off valve
Circulation pump for
DHW reheating
Heating circuit pump of
the heating circuit with
mixer M2
Mixer motor control,
heating circuit with
mixer M2 signal
CLOSED
Mixer motor control,
heating circuit with
mixer M2 signal OPEN
(cont.)
Explanation
■ Max. output: 200 W
■ Voltage: 230 V~
Connect on site
■ Max. output: 130 W
■ Voltage: 230 V~
Connect on site
Accessories
■ Output 10 W
Connect on site
■ Max. output: 130 W
■ Voltage: 230 V~
Connect on site
Switch cylinder primary pump and
two-way shut-off valve in parallel
■ Max. output: 130 W
Connect on site
■ Max. output: 100 W
■ Voltage: 230 V~
Connect on site
■ Max. output: 100 W
Connect on site
■ Voltage: 230 V
Connect on site
■ Voltage: 230 V
Connect on site