Connecting The Flow Temperature Sensor; Connecting The Mixer Motor - Viessmann OpenTherm Installation And Service Instructions For Contractors

Overview of electrical connections
Note
Apply strain relief to on-site cables.

Connecting the flow temperature sensor

Flow temperature sensor for heating circuit with mixer
Connect the flow temperature sensor to
X 12.5 and X 12.6 (see page 12).
Flow temperature sensor for heating circuit without mixer
Connect the temperature sensor to X
3.1 and X 3.2 (see page 12).

Connecting the mixer motor

Mixer motor, part no. 7450 657
A
2 3
1
gS
A Plug on mixer motor
gS Plug on extension kit
| Mixer open
~ Mixer close
Installation sequence
(cont.)
Seal any unnecessary apertures with
cable grommets (not cut open).
Connect the mixer motor in accordance
with the diagram.
Never interchange wires.
13