ENG
FR
1
3
12
5
14
15
KEY
1 Ignition electrode earth faston
3 Fuse (1,6 AT)
5 "ANN. RIT." connector
6 "POT. ACC." trimmer
7 Conector "MET-GPL"
8 D.H.W. potentiometer
9 Detector electrode faston
10 "POT. RISC." trimmer
11 C.H. potentiometer
12 Selector REMOTE/OFF/SUMMER/WINTER/RESET
13 DIP SWITCH
14 Connector "Modureg Sel."
15 Connector "Albatros"
3.2
TEMPERATURE SENSOR
AND WATER PRESSURE
TRANSDUCER
Antifreeze system made up of the NTC hea-
ting sensor that activates when the water
temperature reaches 6°C (42 °F).
Tables 4 - 4/a show the resistance values
(Ω) that are obtained on the sensor as the
temperature varies and the transducer
values obtained as the pressure varies.
When sensor (SM) is interrupted, neither
of the boiler's heating services will func-
tion. With D.H.W. sensor (SB) interrup-
ted, the boiler will only work in heating
mode.
TABLE 4 (Sensors)
Temperature (°C/°F)
20/68
30/86
40/104
50/122
60/140
70/158
80/176
32
11
9
TABLE 4/a (Transducer)
3.3
Ignition and flame detection is controlled
by two electrodes located on the burner.
These guarantee maximum safety with
intervention times, for accidental swit-
ching off or gas failure, of within one
Resistance (Ω)
second.
12.090
8.313
3.3. 1
5.828
4. 1 61
Rotate the selector knob to summer or win-
3.021
ter, and verify that green led (
2.229
confirm the presence of voltage.
1.669
10
13
NOTE: To gain access to trimmers (6) and (10),
slide off the central heating potentiometer knob.
Pressure
Resistance (Ω)
(bar/psi)
mín
máx
0/0
297
320
0,5/7
260
269
1/14.5
222
228
1,5/22
195
200
2/29
167
173
2,5/36
137
143
3/43
108
113
3,5/51
90
94
ELECTRONIC IGNITION
Operating cycle
) lights up to
6
10
7
8
6
The boiler is now ready to start working
upon demand for heating or drawing off
of D.H.W.; a discharge current is sent to
the ignition electrode through the pro-
grammer, and the gas valve opens at the
same time.
The burner must be ignited within 10
seconds. However, it is possible for ignition
failures to occur, with consequent activa-
tion of signal indicating that the control box
has "locked out".
– Gas failure
The control box runs through the cycle
normally sending electric power to the
ignition electrode. The electrode conti-
nues spark discharge for a maximum of
10 sec.If the burner does not light, the
lock-out indicator will light up.
This may occur upon first ignition or
after long periods of boiler lay-off when
there is air in the pipes. It may be caused
by the gas cock being closed or by one of
the valve coils having a break in the win-
ding, so that the valve cannot open.
– Ignition electrode fails to spark
In the boiler, only the gas to the burner
Fig. 20