Overview - Viessmann Vitotronic 300 KW3 Installation Instructions Manual

Overview

The illustration shows the bottom part of the control unit as viewed from rear.
120 VAC connectors
Interconnections Power Pump Module
Boiler circuit pump
DHW pump (accessory)
DHW recirculation pump
(to be field supplied where
required)
Power supply
Compiled fault indication
External equipment,
e.g. additional safety equipment
Burner connections
Burner connection
IMPORTANT
The 120 VAC connections are interface
connections to the power pump
module. Do not connect any external
equipment directly.
Electrical connections
Low voltage connectors
Outdoor temperature sensor
Boiler temperature sensor
DHW tank temperature sensor 1
B DHW tank temperature sensor 2
Flue gas temperature sensor
(accessory)
Telephone connection (external
switching of the heating program)
KM-BUS (accessory)
e.g. for connection of Vitotrol
remote control
or
mixing valve actuator accessory
kit
or
Vitocom 100 communication unit
Extension for two-stage or
modulating burner (included in
standard equipment)
IMPORTANT
Take notice of shape and orientation of
low voltage connectors when inserting
into sockets at rear of control!
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