2.7.2 DUETTO 25 BF TSE wiring diagram (fig. 9/a)
KEY
F1-2
Fuse (4 AT)
PI
C.H. pump
PB
Tank pump
TS
Safety thermostat
SM
C.H. sensor
TPA
Water pressure transducer
FLS
D.H.W. pressure
TA1
Zone 1 room thermostat
TA2
Zone 2 room thermostat
CR
Remote control CR73 (optional)
2.7.3 SOLO 25 BF TSE / DUETTO 25 BF TSE functional diagram
Consensus for start-up
Heater stat
Heater
Motor
Ignition transform.
Gas-oil valve
Flame
Stop light
NOTE: On DUETTO 25 BF TSE without stat, the heater is always fed in winter position.
80
Normal
0÷150 s
~ 12 s
OP
Programming clock (optional)
EXP
Expansion card
AR
Remote alarm
VZ
Zone valve
AUX
Auxiliary connection
BRU
Gas-oil burner
K1-2
Relay
NOTE: Connect TA1 to the clamps 7-8 after having
removed the bridge.
Stopped due to failure to ignite
0÷150 s
~ 12 s
Fig. 9/a
~ 5 s