Unigas RX92R-FGR, Service Manual

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9 ADJUSTING THE AIR/FUEL RATIO CURVES
ATTENTION: when burners are provided with VSD, before setting the air/fuel ratio curves, the Standardization of the motor
speed must be performed (see chapter “Standardization”).
1st level 2nd level 3rd level 4th level 5th level 6th level Description
Params & Display Menu level for making the
parameter settings
RatioControl Parameter settings for fuel/
air ratio control
GasSettings
OilSettings
Parameter settings for firing
on gas or on oil
CurveParams
9.1 Fuel burner settings - curve-points
Two curve points are factory set (default settings) corresponding to a hypothetic low flame stage
Note:
points P1 and P2, are temporally mentioned 10% and 100% load, independently from the actual load. The operator can name the load on each point,
without respecting the actual load value in that point. LMV5x will order those points automatically according to the load values set by the operator.
With this setting, by closing the thermostat series, the burner drives to minimum load position
P1
, after ignition. Then it drives to position
P2
without
increasing the output, as both the points are set with actuators minimum opening.
ATTENTION: For burners with FGR and LMV52.400, the parameter is set to "deactivated".
0
20
40
60
80
100
120
0 20 40 60 80 100 120
S
e
rv
omotor
a
nd V
S
D
pos
ition
Load [%]
Factory set curve-points
Fuel
AIR
AUX3
VSD
P 2
P 1