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Vitodens 100-W, B1HA/B1KA 26 to 125 Combi Installation/Service
Control Connections
Accessing
Electrical Connections
Rotating the control unit and opening the power/pump module
1
.
Press in the control retaining tabs.
2
.
With retaining tabs pressed in rotate the control
forward and down.
3
.
Release the 4 boiler cover retaining clips and pull
cover
off.
4
.
Terminal block for OpenTherm or room thermostat(s)
and outdoor temperature sensor.
Connectors for DHW tank temperature sensor or tank
temperature controller (e.g. Honeywell aquastat and
connections, see the following pages for details.
Note:
this terminal block may be removed for ease of
connection.
Removing the front cover
1. Loosen retaining screws, screws are captive and do
not need to be fully removed.
2. Remove the front panel.
