Honeywell HON R100NG Series - Malfunctions; Malfunctions and abnormalities

Malfunctions
UsermanualforHONR100gaspressureregulatorwithHONP095NGpilot  42
7 Malfunctions
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Topic Page
Malfunctions 42
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7.1 Malfunctions
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Ifnothandledproperly,pressurizedpartscanmoveandcauseseriousinjuries.Ifnot
handledproperlyorintheeventofadefect,gascanescapefrompressurizedcomponents
underhighpressureandcauseseriousinjuriesandevendeath.Beforeyoustartworking
onthesecomponents:
 Closeallconnectionsleadingtothegas‐carryingline.
 Establishadepressurizedstatus.Residualamountsofenergymustbedepressurizedas
well.
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Alwayscontactthemanufacturer’sAfter‐SalesServiceDepartmentfortroubleshootingifone
ofthefollowingoccurs:
 Youarenotabsolutelysurewhattheexactfaultis.
 Thefaultthatoccurredisnotdescribedinthetablebelow.
 Thepossiblecausebehindthefaultisnotlistedinthetablebelow.
 Despiteyourtroubleshootingattempts,thefaultpersists.
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Malfunctionsandabnormalities
Thefollowingtablecontainsadescriptionofmalfunctionsandabnormalitiesthatmayoccurduringtheoperationandlists
procedurestocorrectthem:
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Malfunction Possiblecauses Correction
Outletpressuretoohigh
Thesettingfortheactiveregulator’spilotistoo
high.
Unscrewthepilot’spilotspringabituntilthe
desiredpressureisreached.
Theactiveregulatorhasfailedandthemonitor
regulatorisoperating.
Determinewhattheproblemwiththeactive
regulatoris.
Onlyincaseofaverylowambient/operating
temperature:Thepilotheaterhasfailed.
Restoretheheatingfunction.
Outletpressuretoolow
Thesettingfortheactiveregulator’spilotistoo
low.
Screwinthepilot’spilotspringabituntilthe
desiredpressureisreached.
Thepressuredifferencebetweentheinletand
outletistoosmall.
Increasetheupstreampressureifpossible.
Thevalveisopenalltheway.Thesystemis
unabletodeliverenoughpressure.
Heavysoilinginthereliefchamber.
Thereisnoupstreampressure.
Checkwhetherthesafetyshut‐offvalveorthe
monitorregulatorhasclosed,aswellasthe
reasonforthis.
Theloadingpressureistoolow. Checkthefilterinsertforsoiling.
Onlyincaseofaverylowambient/operating
temperature:Thepilotheaterhasfailed.
Restoretheheatingfunction.
Themonitorregulatorisactiveduring
normaloperation.
Thechosenpressuredifferencebetweenthe
monitorregulatorandtheactiveregulatoris
toosmall.
Eitherscrewinthemonitorpilot’ssetscrewa
bitmoreorunscrewtheregulatorpilot’sset
screwabit.
Thesafetyvalverespondsbeforethe
monitorregulatorintervenes.
Themonitorpilot’ssetpointistoohighoristoo
closetothesafetyvalve’ssetpoint.
Lowerthemonitorpilot’ssetpointorraisethe
safetyvalve’ssetpoint.
Contents
Pressurizedparts
Casesinwhichafter‐sales
serviceisrequired