Viessmann VITOCAL 300-G Installation And Service Instructions Manual page 78

Installation sequence
Electrical connections
■ Mixer motor control, external heat
source
■ Central fault message
■ Circulation pump of separate cooling
circuit and "AC" signal for cooling
■ "NC" signal for cooling
■ Primary pump stages 1 and 2, well
pump
■ Secondary pump stages 1 and 2
■ Circulation pump for DHW reheating
■ Cylinder primary pump (DHW side) /
two-way shut-off valve
■ Heating circuit pump for heating circuit
with mixer M2
■ Mixer motor control, heating circuit M2
■ Secondary pump
■ Instantaneous heating water heater
control, stage 1 (on site)
Connections on controller and sensor
PCB E:
aVG KM BUS
LON Slot for LON module
78
(cont.)
X31 Coding card slot
F.. Sensor connections:
■ Outside temperature sensor
■ Buffer cylinder temperature sen-
sor above
■ Boiler temperature sensor,
external heat source
■ Flow temperature sensor, heat-
ing circuit with mixer M2
■ System flow temperature sen-
sor
■ Flow temperature sensor, sec-
ondary circuit
■ Cylinder temperature sensor,
top
■ Remote control connection for
heating circuits with/without
mixer A1, M2, M3
■ Temperature sensor, separate
cooling circuit
■ Flow temperature sensor, pri-
mary circuit
■ Return temperature sensor, pri-
mary circuit
■ Flow temperature sensor, sec-
ondary circuit
■ Return temperature sensor,
secondary circuit, stages 1 and
2
■ Room temperature sensor, sep-
arate cooling circuit