External extension H2
The external extension is connected
to the boiler control unit via the KM
BUS. The following functions can be
controlled or processed via this exten-
sion:
sK
DHW circulation pump
fÖ
Power supply
aVD
&
External blocking
(terminals 2 - 3)
&
External demand
(terminals 1 - 2)
&
External operating mode chan-
geover (terminals 1 - 2)
aVG
KM BUS
The allocation of the "External chan-
geover of operating mode" function is
selected via coding address 91.
Extensions for external connections (accessory)
(cont.)
101
Function description
56
92
550
GB
Summary of Contents for VITODENS 300 WB3A
Page 10: ...Opening the control unit housing 10 5862 570 GB...
Page 14: ...Closing control unit housing and inserting user interface 14 5862 570 GB...
Page 129: ...Parts lists cont 113 Parts lists 5692 550 GB...
Page 130: ...Parts lists cont 114 Parts lists 5692 550 GB...
Page 131: ...Parts lists cont 115 Parts lists 5692 550 GB...
Page 132: ...Parts lists cont 116 Parts lists 5692 550 GB...
Page 133: ...Parts lists cont 117 Parts lists 5692 550 GB...
Page 145: ...129 5692 550 GB...
Page 146: ...130 5692 550 GB...
Page 147: ...131 5692 550 GB...