Viessmann VITODENS 200-W WB2B Service Instructions For Contractors page 86

Troubleshooting
Repairs
(cont.)
Then standard control mode
resumes.
Changing the rotational direction of the mixer motor (if required)
Danger
An electric shock can be life-threatening.
Before opening the equipment, switch OFF the ON/OFF switch and
mains voltage, for example at the fuse or the main isolator.
A ON/OFF switch
B Rotational direction switch
86
2. Note the rotational direction of the
mixer motor during its self-test.
Then set the mixer manually to
"Open" again.
Note
The flow temperature sensor must
now capture a higher temperature.
If the temperature drops, either the
motor is turning in the wrong direc-
tion or the mixer set is incorrectly
fitted.
Mixer installation instruc-
tions
1. Remove the lower and upper hous-
ing cover of the extension kit.
Extension kit installation
instructions