Electrical Connections To The Terminal Strip For Accessories - Viessmann Vitodens 100-W B1HA 26Vitodens 100-W B1HA 35Vitodens 100-W B1KA 35 Installation And Service Instructions Manual

Additional Information

Electrical Connections to the Terminal Strip for Accessories

Boiler control
64
Vitodens 100-W, B1HA series & B1KA Combi Installation/Service
Follow the installation instructions of field supplied
operating controls.
What is OpenTherm (OT)?
The OpenTherm (OT) protocol is a point-to-point
communication system, which connects a boiler with a
room controller or other devices. The room unit calculates
a heating demand (water temperature request) and
transmits it to the boiler. The boiler will adjust the heat
input accordingly (low-high modulation).
Boiler reset
module (0-10V
controller)
The Viessmann Input Module is designed to accept a
0-10(VDC) modulating input signal from a boiler reset
module controller and send this signal to the Vitodens
100-W with OpenTherm communication.
OT-Devices
Legend
A Viessmann outdoor temperature sensor (OTS)
(field wiring)
B OpenTherm (OT) 0-10V (field wiring)
C Connection cable terminal
D Power terminal block 120V
E Power supply 120V
F Power supply accessories 120V
G Jumper*
%
DHW tank temperature sensor (B1HA only)
or aquastat
* When using the operating methods 'operation without
room temperature thermostat' or 'weather compensated
operation without room temperature thermostat' and once
jumper G is installed, on terminal 96 'L' and '1', refer to
the operating instructions.