Operating Cycle - Sime 30 PC Manual De Instrucciones

IT
ES
Ignition and flame detection is controlled
by two electrodes located on the burner.
PT
These guarantee maximum safety with
intervention times, for accidental swit-
GB
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 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 ignition electrode continues sparking
for max. 10 seconds. If the burner does
not ignite, the board, after a 5-second
fan pause, will restar t sparking for
another 10 seconds. This cycle is repea-
ted 5 times after which the red release
led lights.
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.
– No detection of flame
Only the gas is opened in the boiler. The
block light will turn on after 60 seconds.
80
It may be caused by the fact that the
electrode wire is cut-off or not well
secured to the ignition transformer
terminal board.
The electrode is grounded and badly
worn, needing replacement. The elec-
tronic board is defective.
When there is a sudden voltage failure, the
burner shuts out immediately; when power
) lights up to supply returns, the boiler will start up again
automatically.
3.4 FLOW SWITCH
SAFETY VALVE
A flow switch safety valve (8 fig. 5) interve-
nes, blocking the operation of the burner if
600
500
400
300
200
100
By-pass inserito By-pass on
By-pass escluso
By-pass off
0
100 200 300
BY-PASS ON
By-pass inserito
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.
3.5 SYSTEM AVAILABLE HEAD
The head available for the heating plant is
shown as a function of the flow in graph in
fig. 18. To obtain the maximum head availa-
ble to the system, turn off the by-pass by
turning the union to the vertical position (fig.
18/a).
3.6 SMOKE PRESSURE SWITCH
400 500 600 700
PORTATA (l/h)
FLOW RATE (l/h)
BY-PASS OFF
By-pass escluso
800
Fig. 18
Fig. 18/a