Ecoflam BLU 700.1 PR LN 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.
1 108
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 resident)
104 Gas pressure regulator
106 Filter
108 Gas ball valve (installation resident)
119pBr Measuring point for gas outlet pressure
119.1 Measuring point for gas pressure in valve space
119.2 Air pressure measuring point
8 www.ecoflam-burners.com
Monitoring
The flame is monitored by an ionisation
probe. The probe is insulated and
fitted to the gas head and is routed
through the 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. The
ionization current must be at least 3
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, lasting no more than 3 seconds,
and the gas valve will close.
- If the flame goes out during operation,
the gas supply is interrupted within one
second. A restart takes place. Once the
106 F4 Y12 104 119.1
119
μA.
Y13 119 pBr
burner starts, operation is continued.
Otherwise, a safety lock-out occours.
- If there is a lack of air during reventilation
or operation, a safety lock-out occours.
- If there is a lack of gas, the burner does
not begin operation or switches off.
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.
119.2
F4
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