Operating Cycle - Sime Format.zip 30 OF S 25 Manual Del Usuario

IT
ES
Table 3 shows the resistance values (Ω)
that are obtained on the sensor as the tem-
perature varies.
PT
TABLE 3
GB
Temperature (°C)
20
GR
30
40
RO 50
60
70
RUS
80
3.2.2 Model "30 OF S"
Antifreeze system made up of the NTC hea-
ting sensor that activates when the water
temperature reaches 6°C.
Table 3 gives resistance values (Ω) obtai-
ned with the heating and hot water probes
when the temperature changes.
If the heating probe (SM) is off, the boi-
ler does not work for either heating or
hot water. If the hot water probe (SS) is
off, the boiler works for either heating
or hot water but does not modulate in
D.H.W. mode.
3.3 ELECTRONIC IGNITION
Ignition and flame detection is controlled by
an electrode located on the burner. These
guarantee maximum safety with interven-
tion times, for accidental switching off or
gas failure, of within one second.
3.3. 1

Operating cycle

Rotate the rotary switch to summer or win-
ter, the red led should light up.
Burner ignition normally takes place within
10 seconds. However, it is possible for igni-
tion failures to occur, with consequent acti-
vation 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 ignite, the
control box "locks out".
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 is
seen to open. After 10 sec. the control
box "locks out".
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
ignition transformer.
82
The electrode is earthed or very worm
and needs to be substituted. The control
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
Resistance (Ω)
automatically.
12.090
8.313
5.828
3.4
4. 1 61
3.021
2.229
It is a safety measure against the outflow of
1.669
smoke into the environment due to ineffi-
ciency or a partial clogging up of the flue (18
fig. 3).
It acts by blocking the gas valve when the
release of smoke into the environment is
continuous and in such a quantity as to be
dangerous. To restart the boiler, and reacti-
vate the button of the thermostat.
If the blockage occurs repeatedly a thorou-
gh control of the flue will be necessary,
making all the modifications and taking all
the precautions necessary in order for it to
be efficient.
3.5
The pressure switch with fixed settings:
5.3 - 6.3 mm H
3.6 - 4.6 mm H
"30 OF S" SMOKE
SAFETY DEVICE
"25 - 30 - 35 BF TS" SMOKE
PRESSURE SWITCH (fig. 16)
O in model "25 BF TS"
2
O in model "30 BF TS"
2
4.6 - 5.6 mm H O in model "35 BF TS",
2
is able to guarantee the boiler operation
even with air intake and smoke outlet pipes
at the maximum limit of the length allowed.
The value of the signal to the pressure swit-
ch is measured by means of an instrument
connected as shown in fig. 16.
3.6 "30 OF S" WATER
PRESSURE SWITCH
The water pressure switch (15 fig. 3) is
tripped, stopping the burner, if the pressu-
re in the boiler is lower than 0.6 bar.
To restore burner functioning, restore
pressure in the system to a value between
1-1.2 bar.
3.7 FLOW SWITCH WATER
In model "30 OF S" the flow switch (8 fig.
5) is tripped, stopping the burner, when
no water is detected in the hot water cir-
cuit. In model "BF TS", on the other hand,
it is tripped and stops the burner when it
does not detect water in the primary cir-
cuit (< 450 l/h).
To res t ore burner functioning, check
system pressure and the functioning of the
pump and the flow switch, and the cleaning
of the "Aqua Guard Filter System" filter.
Fig. 16