15
3 - INSTALLATION
3.22.5 - Functional
electrical diagram
CE = Ignition module
CS = Thermostat for C.S.B. (optional)
CSJ = Cold start boiler jump
CB = Control board
DL1 = Gas valve lamp
EA = Ignition electrods
ER = Detection electrode
F1 = Fuse
F2 = Fuse
GS = Sparks generator
IG = Power switch
IP = Summer winter selector
IT = high or low power selector
IVG = Gas valve service switch
P01 = circulator pump
PR = Low water cut-off
PSJ = Connection for plate heat
exchanger or indirect water heater
PWM = Blower speed control
RC = Reset for ignition module
RTC = Room thermostat
connection
SB = switches board
SC = Low water cut-off and lock
out lamp
SG = Electrical power lamp
SP1 = circulator pump light
TP = Domestic hot water priority
thermostat
TR = Heater temperature control
TR1 = Transformer for gas valve
TR2 = Transformer for blower
TR3 = transformer for room
thermostat
TS = High limit thermostat
VE = Blower
VG = Gas valve
