Boiler Control Base - Viessmann VITODENS 222-F Installation Instructions Manual

Floor mounted, gas-fired condensing storage combi boiler
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Boiler Connections
Vitodens 222-F, B2TA 19 and 35 Installation
Connections
(continued)

Boiler control base

Note: See wiring diagram on page 20 for connection to
the external accessory connection box.
OUTDOOR
TEMPERATURE
SENSOR
21

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