Viessmann B2HA 80 - Thermostat Connection

Vitodens 200-W B2HA 80 to 100, 285 to 352 Installation
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5685 827 - 14
Control Connections
Thermostat Connection
Legend
A Room thermostat (dry contact) zone circuit 1
B Room thermostat (dry contact) zone circuit 2
C Room thermostat (dry contact) zone circuit 3
D EA1 module (integrated into the boiler)
Refer to the boiler Installation Instructions for
locating and accessing the integrated EA1 module.