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TABLE 3/a (Transducer)
Pressure
(bar)
0
0,5
1
1,5
2
2,5
3
3,5
3.3
ELECTRONIC
IGNITION
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
second.
3.3. 1
Operating cycle
Rotate the selector knob to summer or win-
ter, and verify that green led (
confirm the presence of voltage.
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".
94
12
11
10
KEY
1 Ignition electrode earth faston
2 Ignition electrode faston
3 Fuse (1,6 AT)
4 Fuse(0, 1 6 AT)
5 "ANN. RIT." connector
6 "POT. ACC." trimmer
7 Conector "MET-GPL"
8 ------
– Gas failure
The electrode continues spark discharge
Resistance (Ω)
for a maximum of 10 sec.If the burner
min
max
does not light, the lock-out indicator will
297
320
light up.
260
269
222
228
This may occur upon first ignition or
195
200
after long periods of boiler lay-off when
167
173
there is air in the pipes. It may be caused
137
143
by the gas cock being closed or by one of
108
113
the valve coils having a break in the win-
90
94
ding, so that the valve cannot open.
– Ignition electrode fails to spark
In the boiler, only the gas to the burner
is seen to open.
After 10 sec. the warning light indica-
ting equipment "lock-out" lights up.
This may be due to a break in the wire of
the electrode or to the wire not properly
fastened to the electric terminal of the
control box or the ignition transformer.
– No detection of flame
The continuous spark discharge of the
electrode is noted starting from ignition
even though the burner is lit.
) lights up to
Af t er 10 seconds have elapsed, the
sparks cease, the burner goes out, and
the warning light indicating equipment
"lock-out" lights up.
There could have a break in the wire of
the sensing electrode or the electrode
itself is touching earth: the electrode is
9
8
7
6
15
9 Detector electrode faston
10 "POT. RISC." trimmer
11 C.H. potentiometer
12 Selector CR/OFF/EST/INV/RESET
15 Albatros RVA 47 conector
NOTE:
To gain access to trimmers (6) and (10), unscrew
the central heating potentiometer knob.
6
10
WARNING: In sequence/cascade
installations, turn trimmer B (10) as
far as it will go clockwise.
worn out and needs replacing. The con-
trol box is defective.
When there is a sudden voltage failure, the
burner shuts out immediately; when power
supply returns, the boiler will start up again
automatically.
3.4
AIR PRESSURE
SWITCH
The air pressure switch is factory set to
the values to guarantee boiler functioning
even with intake and flue pipes at the
maximum permitted length.
The value of the signal to the pressure
switch is measured using a special instru-
ment connected to the pressure intake
(5-4 fig. 3).
3.5
FLOW SWITCH SAFETY VALVE
A flow switch safety valve (18 fig. 3) interve-
nes, blocking the operation of the burner if
the boiler is without water due to the for-
mation of an air lock in the heat exchanger
or if the circulator is not working, or becau-
se the "Aqua Guard" filter is obstructed with
impurities.
NOTE: If replacing the flow switch valve,
make sure that the arrow stamped on
the valve points in the same direction as
the flow of water.
Fig. 20
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