Electrical Connections To The Terminal Strip For Accessories - Viessmann Vitodens 100-W WB1B Series Installation And Service Instructions Manual

Additional Information
Vitodens 100-W, WB1B Installation & Service

Electrical Connections to the Terminal Strip for Accessories

Follow the installation instructions of field supplied
operating controls.
What is OpenTherm?
The OpenTherm (OT) protocol is a point-to-point
communication system, which connects a boiler with a
Boiler reset
module (0-10V
room controller or other devices. The room unit calculates
controller)
a heating demand (water temperature request) and
transmits it to the boiler. The boiler will adjust the heat
input accordingly (low-high modulation).
OT-Devices
The Viessmann Input Module is designed to accept a
0-10(DC) modulating input signal from a boiler reset
module controller and send this signal to the Vitodens
Boiler control
100 with OpenTherm communication.
Boiler control base
GAS PUMP FAN
Legend
A Viessmann outdoor temperature sensor (field wiring)
B OpenTherm (field wiring)
C Connection cable terminal
Diverting valve
D Power pump module
DHW / flow sensor
Follow the installation instructions of the field supplied
operating controls.
Terminal strip for accessories connections.
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