External Extensions Am1 (Accessory) - Viessmann VITODENS 200-W B2HA 150 Service Instructions Manual

Function Description
External Extensions AM1
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
Legend
A1 Circulation pump
A2 Circulation pump
fÖ Power supply
A Power supply for additional
40A
accessories
pump (potential-free)
KM BUS
aVG
84
(accessory)
Select the output functions by means of the codes on
the boiler control unit.
Function assignment
Function
DHW recirculation pump
28
Heating circuit pump 20
Circulation pump for DHW
tank heating 21
Refer to main wiring diagram on page 90.
Vitodens 200-W B2HA 112, 150, 399, 530 Service
Code ("General" group)
Output A1
33:0
33:1(delivered
33:2
Output A2
34:0 (delivered
condition)
34:1
condition)
34:2