Viessmann Vitoligno 300-H Installation And Service Instructions For Contractors page 150

Connection and wiring diagram
PCB KSK 2.03
(cont.)
Fig. 93
Boiler circuit pump
sL *6
Power supply 230 V, 50 Hz
fÖ
A Central fault message
gÖ
Ignition
gF *6
Enable additional heat generator
jL
kS *6 Motor, heat exchanger cleaning
Motor, flue gas fan
a-Ö *6
Electrical installation
Requirements
The electrical installation should be carried out in
accordance with the wiring diagram. In the vicinity of
hot parts (flue gas fan, flue pipe), cables must be
routed in steel pipes and with appropriate clearances
for temperature protection.
The cable entries for motors and appliances must be
dust-proof and provided with strain relief.
Internally prewired
*6
150
High limit safety cut-out and ON/OFF switch
aBÖ *6
Low water indicator
aBS
Water pressure switch
aBD
Buffer cylinder control valve or screw conveyor
a;A
motor for ash removal (option)
a;S *6 Mixer motor, return temperature raising facility
*6 Connection to HKK PCB
s-Ö
Note
The regulations of the local power supply utility must
be observed.