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Vitodens 100-W, B1HE/B1KE Combi Installation/Service
Fault Messages
(continued)
Troubleshooting
Fault Messages
(continued)
Repairs
(continued)
B1HE/KE 85/120
WARNING
Risk of electric shock from escaping heating water or
DHW. Check the dual sensor for leaks.
1. Remove the control unit.
2. Unscrew the union nut at the top and screws at
the bottom of the gas pipe.
Note: Hold the union nut in place (with an open ended
wrench) to prevent damage to the gas pipe, use
the two handed method.
3. Remove the burner.
4. Remove the clips, push the pipe upwards and pivot it
backwards. Then remove the pipe downwards.
5. Pull the clip off the supply pipe, new cable ties must
be installed when securing the clips.
6. Pull off the clips. Push the supply pipe upwards.
Note: If necessary, the safety valve with drain must
be removed.
7. Undo the screws at the bottom of the hydraulic unit.
8. Unplug the cable.
9. Raise the hydraulic unit and remove it toward the front.
The hydraulic unit is installed in reverse order.
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