2. 1 2
BOILER ELECTRICAL DIAGRAM (fig. 13 - fig. 13/a)
Modello "25 OF"
TA
(24 VDC)
KEY
F
TRA
PI
EAR
EV1-2
TF
M
SM1/SM2 Heating sensor
FLM
SS
PA
TA
80
EV1-2
PA (24 VDC)
SE (3,3 VDC)
S.AUX
(3,3 VDC)
Fuse (1.6 AT)
Ignition transformer
System pump
Ignition/detection electrode
Gas valve coil
Smoke thermostat
Modulator
D.H.W. flow meter
D.H.W. sensor
Water pressure valve
Environment thermostat
PI
F
TF
(24 VDC)
SM1 / SM2
(3,3 VDC)
SE
S.AUX
EXP
NOTE: Connect TA to the clamps 5-6 after having
removed the bridge.
CONNECTOR SPARE PART CODES:
CN4
code 6316256
CN5
code 6316253
CN6
code 6316255
EAR
TRA
R59
EXP (24 VDC)
FLM (12 VDC)
External sensor (optional)
Auxiliary sensor
Expansion card remote control (optional)
M (17 VDC)
SS (3,3 VDC)
Fig. 13