131
IT
ES
FR
BE
GB
RUS
RO
3.2
TEMPERATURE
PROBE AND WATER
PRESSURE TRANSDUCER
Antifreeze system made up of the NTC
heating sensor that activates when
the water temperature reaches 6°C.
Tables 1 - 1/a
include the resistance
values (
Ω
) that are obtained on the
probe (SM) when the temperature
changes and those on the transducer
when pressure changes.
The boiler will not work if the heating
probe (SM) is open circuit or discon-
nected.
3.3
ELECTRONIC IGNITION
Ignition and flame detection is con-
trolled by two electrodes located on
the burner. These guarantee maxi-
mum safety with intervention times,
for accidental switching off or gas fai-
lure, of within one second.
3.3.1
Operating cycle
Rotate the selector to summer or win-
ter and check the green led (
) to
make sure power is on. The burner
should ignite within max. 10 seconds.
An ignition failure will cause the
"Ignition Blocked" indicator (fig 12) to
illuminate, This may be due to the fol-
lowing:
–
Ignition electrode does not spark
Gas is being supplied to the boiler
and, after 10 sec., the block led turns
on.
This may be due a faulty or discon-
nected spark generator, faulty or
disconnected ignition electrode.
–
No flame detection
At ignition, the electrode continues
to spark even though the burner is
on. After 10 sec. it stops sparking,
the burner turns off and the block
led turns on.
This may be due to a faulty, discon-
nected or damaged ionisation elec-
trode, wrong polarity(live and neu-
tral reversed).
The boiler should resume automatical-
ly after a power failure.
3.4
AIR PRESSURE SWITCH
The air pressure switch is not adjusta-
ble. Its value is shown on the air pres-
sure switch.
15
13
1
3
5
8
9
10
11
12
14
6
6
10
X25
X4
16
17
Fig. 13
TABLE 1/a (Transducer)
Pressure
Resistance (
Ω
)
(bar)
mín
máx
0
297
320
0,5
260
269
1
222
228
1,5
195
200
2
167
173
2,5
137
143
3
108
113
3,5
90
94
TABLE 1 (Sensors)
Temperature (°C)
Resistance (
Ω
)
20
12.090
30
8.313
40
5.828
50
4.161
60
3.021
70
2.229
80
1.669
KEY
1 Ignition electrode earth faston
3 Fuse (1,6 AT)
5 “ANN. RIT.” connector
6 “POT. ACC.” trimmer
8 D.H.W. potentiometer
9 Detector electrode faston
10 “POT. RISC.” trimmer
11 C.H. potentiometer
12 Selector CR/OFF/EST/INV/RESET
13 DIP SWITCH
14 Connector “Modureg Sel.”
15 Connector “Albatros”
16 Connector X25
17 Connector X4
NOTE: To gain access to trimmers (6) and (10), unscrew the central heating potentiometer knob.
