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Vitodens 100-W, B1HA/B1KA 26 to 125 Combi Installation/Service
B1KA 35, 125 Wiring Diagram
Legend
A
Ignition/ionization
B
Room thermostat (dry contact) or
OpenTherm (OT) Interface input
C
Outdoor Temperature Sensor (OTS)
D
Diverting valve stepping motor
E
GDW input (not used)
F
PWM pump output (not used)
G
Powered accessory connection or 120VAC room
thermostat
(RT)
If any of the original wires as supplied with the appliance
must be replaced, it must be replaced with the exact
equivalent.
3
Boiler Temperature Sensor
4
DHW Supply Temperature Sensor
15
Flue Gas temperature Sensor
20
Boiler Pump (internal)
33
Flow Switch
35 Gas Valve
47 Fixed High Limit
100 Fan Motor
100A Fan Motor Control
149
Flow Sensor (DHW)
WARNING
DISCONNECT POWER BEFORE SERVICING BOILER.
CAUTION
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous
operation. Verify proper operation after servicing.
Electrical Installations must comply with:
In the USA National Electric Code (NEC), ANSI/NFPA
70 and any other national, state and local codes and/or
regulations.
In Canada, the Canadian Electrical Code (CEC), CSA
C22.1 Canadian Electrical Code Part 1 and any other
province, territory, local codes and/or regulations.
Additional Information
