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Viessmann Vitocrossal 300 CU3A 26 Installation Instructions Manual page 35

Floor mounted, gas-fired condensing boiler with matrix gas burner and lambda pro control
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Control Connections
Vitocrossal 300 CU3A 26 to 199 Installation
Connections
(continued)
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)
35

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This manual is also suitable for:

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