
Part 9 - Electrical connections
To Fan
Pump + Fan connector
Slide WHITE cable tree
CONNECTOR on / of
BURNER CONT. Print
Fan + Pump
Room Thermostat
on / of or Open
Therm
Outside sensor
Tank
Flue gas,
3 w ay valve,
CH supply
sens.
Flow (DHW) +
Temp. (DHW)
Pressure (CH
return) + Treturn
(CH)
Figure 9.3 Print circuit board main connections
To Pump
Ground CONNECTORS
Pow er
for Green / Yellow
supply
ground cables
cable
(Supply, Fan, Pump)
Ground
connection
ignition pin
Ignition cable
to spark plug
53