Ecoflam GAS 350 PAB Manual De Uso página 8

EN
Function
- General safety functions
Description of functions
When the system is switched on for the
first time, after a power failure or safety
shutdown, after a lack of gas or after the
system has been out of operation for 24
hours, the pre-ventilation period of 30
seconds begins.
During pre-purge period:
- blower pressure is monitored
- the combustion chamber is monitored for
flame signals.
At the end of the pre-purge period:
- ignition is switched on.
- main and safety valve are opened.
- burner starts.
Monitoring
The flame is monitored by an ionization
probe. The probe is insulated and fitted to
the gas head and is routed through the
F6
8 www.ecoflam-burners.com
flame disc into the flame zone. The probe
must not have any electrical contact with
earthed parts.The burner switches to lock-
out if a short circuit occurs between the
probe and the burner earth. During burner
operation, an ionised zone is produced in
the gas flame through which a rectified
current flows from the probe to the burner
head.
Safety functions
- If no flame is produced when the burner
is started (gas release), the burner will be
switched off at the end of the safety period,
and the gas valve will close.
- If the flame goes out during operation,
the gas supply is interrupted and the
control unit goes to block.
- If there is a lack of air during reventilation
or operation, the control unit goes to block.
- If there is a lack of gas, the burner does
not begin operation or switches off.
119 pBr Y13 119.1 104
119.2
In the event of controller shutdown
- Controller thermostat interrupts heat
request.
- Gas solenoid valves close.
- Flame goes out.
- Burner motor switches off.
- Burner is ready for operation.
Y12 F4 106 108
119
F4 Minimum gas pressure switch
F6 Air pressure switch
Y13 Main solenoid valve
Y12 Safety solenoid valve
1 Thermally-triggered safety shut-off valve
(installation by installer)
104 Gas pressure regulator
106 Filter
108 Gas ball valve (installation by installer)
119pBr Measuring point for gas outlet pressure
119.1 Measuring point for gas pressure in valve space
119.2 Air pressure measuring point
1
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