Spitfire DC40 - Maintenance and Fault Finding; General Maintenance Schedule; Pressure Setting Adjustment

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MAINTENANCEANDFAULTFINDINGPROCEDURES

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WARNING:ALWAYSISOLATEUNITFROMTHEELECTRICALSUPPLYBEFOREATTEMPTING

ANYREPAIRSORMAINTENANCE.

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General:

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 Every150hours:Washinletfilterwithmilddetergentanddr y.

Filtermustbethoroughlydrybeforereplacingandmustnotbeoiled.

 Every150hours:Checkthat

allairlinesaretightandingoodco ndition.

 Every300hours:Replacefuelfilter.

 Every600hours:Drainthefueltankandflushitusingcleanfuel.

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PressureSetting:

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 Onceperseasonorwhennecessary,adjustpressuresettingasperprocedurebelow.

‐Thepressure

settingmustbeadjustedtoachievearedexitconewithNOflameexiting

theheater.

‐Aredexitconewillensureodourfreeoperation.

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Toadjustpressuresetting:

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1. Startandrunheateruntilstableoperatingtemperatureisachieved.

2. Withheaterrunning,loosenlocknutA.

3. Set

correctpressurebyadjustingvalveB.

‐Screwing the valve clockwise will increase the fuel flow  andachieveamoreredexit

cone.

‐Ifflamesareexitingtheheate r,turnthevalveanti‐clockwisetoreducefuelflow.

4. Oncesuitablepressurehasbeenset,tightenlocknutA.

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LockNutA

PressureValveB

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