Unigas HTLX 1025.1 Installation Manual page 75

9.2 Setting the load points output (burners with no FGR)
Following the below route access to the programming levels of the menu
1st level 2nd level
Params & Display
RatioControl
Point Load 10
Fuel 6,7
/
Man Air 12
VSD 50
Point Load 10
: 1 Fuel 12
Man Air 6,7
VSD 50
Point Load
: 2 Fuel
Man Air
VSD
Change
Delete
Follow
Not Follow
Now it is possible to change Point2 with the next procedure
Checking continuously the air excess means of the combustion analyzer, increasing by few degrees* the air damper opening and the VSD if provided.
Then increase by few degrees* the gas butterfly valve (or the fuel actuator). Go on step by step, until the butterfly valve complete opening is reached
(actuator at 90° - see diagram).
The target is to reach the gas butterfly valve maximum with a sufficient excess of air. While progressively increasing the actuator positions, besides
increasing the air quantity the fuel rate must be controlled by means of the valve pressure governor, in order to not exceed the requested maximum flow
rate.
Once the gas butterfly valve maximum opening is reached, adjust the fuel rate only acting on the gas valve pressure governor (or on the oil pressure
governor in case of oil).
ATTENTION: as for "increasing by few degrees" it means that the increasing must be performed in order to avoid great excess of
air or defect of air.
Therefore the increasing operation must be performed always checking the flue gas analysis by means of the combustion
analyzer. It is recommended to make increasing while maintaining O 2 % between max 7,5% and min 3%.
It is recommended to save new points increasing the burner output at step odf10÷20% load. Measuring the burner output at the flow meter.
In this way, if for any reason, you must interrupt the commissioning and restart it later, you would help yourself.
3rd level
GasSettings
GasSettings
CurveParams
Wait until symbol "\" stops twisting. It indicates that actuators are moving to the displayed position.
When the position is reached it will show the number of the point the LMV5x is at.
Press Enter
Press "right arrow"
Press Enter
100
Press "right arrow"
12
Press Enter
6,7
50
Point Load 100
: 2 Fuel 12
Man Air 6,7
VSD 50
4th level 5th level
to see Point1.
to scroll to the desired point
to change the curve point.
to change the curve point.
Select "change" to change the point, or "delete" to cancel it
Press "right arrow"
Press Enter
change its setting
The selector will be on Load.
By menas the arrow
27
6th level
to scroll to the desired point
to scroll to the desired point
on "Follow". The actuator moves in real time as the operator
scroll to the desired actuator
Description
Parameter settings for fuel/
air ratio control
Parameter settings for firing
on Gas or on Oil
At this level, the air/fuel ratio
during operation is to be set.