Viessmann Vitoligno 300-P Service Instructions For Contractors page 90

Troubleshooting
Repairs
(cont.)
Mixer circuit extension kit, part no. 7267 627
Components:
■ Mixer motor with 4.2 m long connect-
ing cable
■ Connecting plug for the heating circuit
pump
■ Flow temperature sensor (contact
temperature sensor)
Mixer motor, part no. 7450 657
Changing the rotational direction
A 3-pole plug in the mixer motor
| Mixer open
~ Mixer close
Checking the rotational direction
The mixer is moved to "Open" and
"Close" using the control unit actuator
test (see page 29).
Manual mixer adjustment
Lift the motor lever, unhook the mixer
handle and pull plug A.
90
A
Flow temperature sensor
See contact temperature sensor,
page 87.
The rotational direction must be
changed for the installation examples on
page 91 and for systems with Modu-
lar-Divicon.
Undo the cover and insert plug A after
turning it 180°.
Specification
Rated voltage
Rated frequency
Power consumption 4 W
Protection
Torque
Runtime for 90° ∢
230 V∼
50 Hz
IP 42
3 Nm
120 s