FULTON VMP Series - Setting Burner Controls for Low;High Fire

VMP-IOMM-2018-2
Fulton Ltd
Page 27
COMMISSIONING - 3
15. Aftertheburnerhasbeenringforapproximatelyveminutes,adjustthemainaircontrolgate
located on the burner scroll, to obtain a clean combustion.
See typical combustion values given in Appendix A - TI 128.
16. Observetheamethroughtheobservationglassandadjusttheprimary/secondaryaircontrol
locatedontheburner,sothattheamecanbeseenpassingdowntheblasttube.
17. Check the operation of the low water safety controls (see Section 5.4.2 - Low Water Level
Check).
18. Adjust the steam pressure control to suit the boiler application (see Section 4.2.3 - Steam
Pressure Controls). It should be borne in mind that boilers are designed to operate most
efcientlyattheirmaximumoperatingpressure.Whenboilersaretobeoperatedbelowa
pressureof80psi(5.5bar)considerationshouldbegiventothettingofapressurereducing
set.
3.2.1 
Thecorrectsettingforlowre/highreoperationismadebymakingadjustmentstothetwostage
solenoidvalveandthelowresteampressureswitch.
1. Isolate the main gas valve by closing the valve in the gas input line.
2. Screw the pilot gas governor fully down (governor open).
3. Start the burner and where possible meter the pilot gas rate (ideally the pilot gas rate should
be 10% of the full gas rate).
4. Check the ignition and pilot stability several times.
Record the pilot gas pressure.
5. Open the main gas isolating valve.
6. Setthegasinputtotheboilerforcorrectinputonhighre.Thisadjustmentshouldbedone
where possible by using the gas meter.
Adjust the main and secondary air gates to obtain optimum combustion conditions.
7. Adjustthelowresteampressureswitchtocutoutatapproximately5psibelowthesettingof
the main steam pressure control.
8. Adjustthetwo-stagesolenoidvalvetoobtainalowregasinputofapproximately80%ofhigh
re.
Leavetheairgateadjustmentsasforhighre.
3.2 SETTING THE BURNER CONTROLS GAS BURNER