Viessmann VITOLADENS 300-W Installation And Service Instructions Manual page 110

Troubleshooting
Repair
(cont.)
Checking the rotational direction of
the mixer motor
After being switched on, the boiler imple-
ments a self-test. During this, the mixer
is opened and closed again.
Note
The mixer motor can also be started via
the actuator test (see chapter "Checking
outputs").
Changing the rotational direction of the mixer motor (if required)
gS
|
BU
~
110
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 tem-
perature drops, either the motor is turn-
ing in the wrong direction or the mixer
insert is incorrectly fitted.
Mixer installation instructions
1. Remove the upper casing cover of
the extension kit.
Danger
An electric shock can be life-
threatening.
Before opening the boiler, dis-
connect from the mains volt-
age, e.g. at the fuse or the
mains isolator.
2. At plug gS, swap the cores at termi-
nals "|" and "~".
3. Refit the casing cover.