The controls are prearranged to operate with only one
electrode for ignition and flame detection (the ignition
electrode also makes the flame detection function by means
of wire connection between pin 16 of J4 and fast-on J5 as
shown in figure 4a); they can also correctly operate with
separate ignition electrode and detection electrode (as
shown in figure 4b).
DIRECTIONS FOR THE USE
− For technical-safety reasons a regulation shutdown must
occur every 24 hours (systems for non-permanent
operation).
− Automatic controls are safety devices and shall not be
opened. Responsibility and guarantee of the
manufacturer is invalidated if the control is opened.
− The control must be connected and disconnected only
without the main power.
− The control can be mounted in any position.
− Avoid exposure of the control unit to dripping water.
− Ventilation and the lowest temperature ensures the
longest life of the control.
− Make sure that the type (code and times) you are using
is correct before installing or replacing the control.
− The gas appliance in which the control is installed must
provide adequate protection against the risk of electrical
shock (at least IP20).
Electrical installation
− The applicable national regulation and European
standards (e.g. EN60335-1/EN50165) regarding
electrical safety must be respected.
− Live and neutral should be connected correctly, a
mistake could cause a dangerous situation, i.e. the
valve would still be live with the thermostats and limits
switched off. Besides, if live-neutral polarity is not
respected the control performs a non-volatile at the end
of the safety time at starting up.
− Before starting check the cables carefully. Wrong
connections can damage the control and compromise
the safety.
− Take great care while connecting the lock-out signal and
reset button: an inversion in the connection can damage
the control.
− The earth terminal of the control, the metal frame of the
burner and the earth on the mains supply must be well
connected.
− Use an ignition cable as short and straight as possible
and keep it far from other conductors.
− Using the control with separate detection electrode, a
heat resistant cable and detection probe must be used,
well insulated to the ground and protected from possible
woisture (or water in general).
IMPORTANT: in the event of "partial" short circuits or
bad insulation between phase(s) and earth the voltage
on the ionization device can be reduced until it causes
the lock-out of the control.
Checking at start
Always check the control before the first start and also after
substitutions or a long period of non operation of the
system. Before any ignition attempt make sure that the
combustion chamber is free from gas.
Then make sure that:
− if the attempt to start occurs without the gas supply the
control performs a non-volatile or volatile lock-out after
TS;
− when stopping the gas flow (while the control is in
running state) supply to the gas valve is interrupted
within 1 second and after a recycling, the control
proceeds to a non-volatile lock-out;
− operating times and sequence are suitable;
− the level of the flame signal is sufficient, see Fig.4 for the
measuring test;
− the intervention of limiters or safety devices causes a
safety shut-down according to the application.
Fig.3
Operation
At every start the control unit proceeds to a self-checking of
its own components.
In the type with control of the fan, before the elapsing of pre-
purge time (TW), the air pressure switch contacts are
checked to prove their "no air flow" state.
Only if the test is positive the fan is started and with the air
pressure switch in "air flow" state, pre-purge time begins.
At the end of wanting or pre-purge time the gas valve is
supplied and the ignition device, so that safety time TS and
ignition time TSP begin.
The ignition device is kept in operation for 40% of the safety
time TS under all operating condition (time TSP ending). If
during remaining time TS, the control unit will keep the gas
valve supplied until a flame failure occurs (followed by a
recycling) or the regulation ring opens. On the contrary, if
the control doesn't detect a flame by the end of TS, it
proceeds to non-volatile (or volatile) lock-out, the gas valve
is switched off while the lock-out signal output is supplied.
The attached diagrams are useful to understand how each
control operates.
Reset of the control
When a control has gone to non-volatile or volatile lock-out,
an interval of 10 seconds should be allowed before
attempting to reset the control unit; if this time is not
observed then the control may not reset correctly.
In general, resetting of the appliance must occur in sight and
in the near vicinity of the appliance. Resetting must also
occur by means of a conscious manual action and not by
means of automatic device like thermostats or timers.
Please note that it is allowed to combine the reset button
together with the main switch on the appliance. In this case
the alarm light will have to be installed too.
IGNIT. / DETEC.
ELECTRODE
J4 J5 J6
-+
I ion
3999_r01
