Viessmann Vitoligno 300-C Installation And Service Instructions Manual page 171

PCB KSK 2.03
(cont.)
a-Ö *15 Motor, flue gas fan
High limit safety cut-out and mains isolator
aBÖ *15
Low water indicator
aBS
Water pressure switch
aBD
Internally prewired
*15
Connection and wiring diagram
Buffer cylinder control valve or screw conveyor
a;A
motor for ash removal (option)
*15 Mixer motor, return temperature raising facility
a;S
Connection to HKK PCB
s-Ö *15
171