Unigas HR92A, Manual Of Installation - Use - Maintenance

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40
BURNER STARTUP WITH LMV2x ALREADY PROGRAMMED
Once the LMV turns on, the AZL display will show
The burners is basically factory set. The air/fuel ratio curve is set with the maximum output point P9 a little higher or equal to P0. To
adjust the burner on the plant site, adjust the maximum output point to the flow rate values really requested. Then go through the curve-
points, by pressing “+” several times to reach point P9: then adjust the air actuator position (for the air damper) and the fuel acttuator
(for the butterfly valve, in case of gas or the oil pressure governor incase of oil), by adjusting the fuel flow rate by means of the gas pres-
sure stabiliser (for gas) or the oil pressure governor (for oil), checking the combustion valeus contemporarly. Once the burner is adju-
sted at the maximum output, press “-” for more than 5 seconds to process the curve downwards. The curve is then a straight line: go on
checking the combustion values point by point; change them if necessary and in case linearise the curve again.
Before starting the burner up, press
F
and
A
at the same time
enter the password following the procedure on chapter “Programming LMV2x”.
Press ENTER until the display will show:
Press ENTER again: it will show
press ENTER (InFo) : the display will show phase 12.
Ph12:
Standby
phase (stationary)
Ph12:
Standby
phase (stationary)
By closing the thermostatic series, the burner startup cycle will take place:
Ph22:
Fan ramp up
phase (fan motor = ON, safety shutoff valve = ON)
Ph24:
Traveling to prepurge position
phase
Ph30:
Prepurge
phase
Ph36:
Traveling to ignition position
phase
Ph38:
Preignition
phase
Ph40:
1st safety time
phase (ignition transformer ON)
Ph42:
1st safety time
phase (ignition transformer OFF), preignition time OFF
Ph44:
Interval1
The startup sequence stops at phase 44.
The burners is lit and is in“P1” position (low flame point):