Viessmann VITOPEND 200 Installation And Service Instructions Manual page 96

Troubleshooting
Repairs
(cont.)
Extension kit for heating circuit with mixer
Checking the rotational direction of
the mixer motor
A Rotational direction switch
B ON/OFF switch
1. Switch the ON/OFF switch at the
motor first OFF and then ON again.
The device will carry out the follow-
ing self‐test:
&
Mixer "Close" (150 s)
&
Pump "ON" (10 s)
&
Mixer "Open" (10 s)
&
Mixer "Close" (10 s)
Then the regulated operation
recommences.
Checking the Vitotronic 050 (accessories)
The Vitotronic 050 is connected with the control unit via the LON system. To test
the connection, implement a user check at the boiler control unit (see page 48).
96
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 sense 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
3. Adjust the rotational direction of
the mixer motor (if required).
&
Switch position I for central heat-
ing return from the left (delivered
condition).
&
Switch position II for central heat-
ing return from the right.