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6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service
Fault Messages
(continued)
Wiring Diagram
Fault Messages
(continued)
BCU Burner Control Unit
Legend
A3 BCU burner control unit
A
HMU heat management unit (plug 156)
B
HMU heat management unit (terminal X4)
C
Flue gas temperature sensor
D
Boiler water temperature sensor 1 and 2
E
Gas solenoid valve and fan motor with PWM
switching and feedback
F
Boiler flow switch
G
Ignition unit and flame monitoring
H
DHW flow switch (B1KE only)
K
Internal circulation pump (primary pump)
L
3-way diverter valve
M
DHW outlet temperature sensor (B1KE only)
Содержание B1HE Series
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