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Vitodens 200-W B2HA 112, 150 Service
5683 710 - 09
84
External Extensions AM1 (accessory)
Legend
A1
Circulation pump
A2
Circulation pump
fÖ
Power supply
40A
A Power supply for additional
accessories
pump
(potential-free)
aVG
KM BUS
Functions
One of the following circulation pumps can be connected
to each of the connections A1 and A2:
- Heating circuit pump for the heating circuit without
mixing valve
- Circulation pump for DHW tank heating
- DHW recirculation pump
Function assignment
Function
Code (“General” group)
Output A1
Output A2
DHW recirculation pump
28
Heating circuit pump 20
Circulation pump for DHW
tank heating 21
33:0
33:1(delivered
condition)
33:2
34:0(delivered
condition)
34:1
34:2
Select the output functions by means of the codes on
the boiler control unit.
Refer to main wiring diagram on page 90.
Function Description