Global 5120 - Figure 17 Venturi Location

GlobalPowerTechnologies  3-7
5120
3.2.3 Air Supply
Thescreenatthefrontoftheburnermaybecomecloggedwithdustandinsectstherebypre-
ventingtheproperowofairtotheburner.Tocleanitproceedasfollows:
1) Shut-o󰀨thefuelsupplytotheTEG.
2) Disconnecttheexiblefuellinefromthefrontoftheburner.
3) Removetheoricetting,theadjustingscrewlocknutandthetwowing-nuts.
4) Removethescreen.
5) Cleanthescreenbyforcingairthroughitorwashinginwater.
6) Replacescreenandttings.
7) Turntheventuriadjustingscrewcounter-clockwiseasfarasitwillgothenturnitclock-
wisefourturns.Thiswillsettheadjustmentinthecorrectrangetobeginbalancingthe
air-fuelmixturewhenre-starting.
8) Beforere-startingtheTEG,leakcheckallfuelconnections.
3.2.4 Burner
TheBurnersystemcontainstheventuriandairlterassemblieswhichallowforadjustmentof
theair/fuelmixture.Thismixturepassesthroughtheventuritothebackoftheburnerwhere
combustiontakesplace.AproblemintheburnerissuspectedonlyifV
set
cannotbebrought
uptoratedpower.Makesurethefuelsystemandairsupplyareokaybeforeproceedingto
servicetheburner.
3.2.4.1 Removing the Burner
Allowthegeneratortocoolthenproceedasfollows:
1) Disconnectthehighvoltagewirefromthesparkelectrode.
2) Loosenthewing-nutandslidethesparkelectrodeout.
3) Removethewing-nutnearthebottomoftheexhauststackthenslidetheexhauststack
out.
4) Disconnecttheexiblefuellinefromthefrontoftheairscreen.
5) Removetheoricetting.
6) Ifnecessary,disconnectandremovethefuelsystem(SeeSection3.2.2).
7) Removethefourwing-nutsholding
the burner in place and slide the
burner out.
3.2.4.2 Inspecting the Burner
(Figure 18)
1) Check the venturi assembly.  If it
looks severely corroded it should
bereplaced.Makesuretheventuri
is properly located in the venturi
tube (1.50” from end, Figure 17),
and that the venturi is facing the
properdirection.
Figure 17 VenturiLocation