Jelrus Infinity M-30 - Replace Thermocouple Assembly

1 Removethebottomfrontpanelandtheupperandlowerrearpanelsofthefurnace(Notethepositionof
 theventlouversontherearpanels)
2 NoteandrecordthecolorandlocationofthewiresonthethermocoupleterminalslocatedontheMain
 PCBoard(Figure5)
3 RemovethethermocouplewiresfromthethermocoupleterminalsontheMainPCBoard(Figure5)
4 Removetheclampwhichsecuresthethermocoupletotheceramicterminalblocklocatedintheupperrear
 ofthefurnace(Figure4)
5 Removetheheatingplatewirewhichcrossesoverthethermocoupleandbenditoutofthewayjustenough
 topermitslidingthethermocoupleoutoftherearoftheheatingchamber(Figure4)
6 Removetheinsulatingfillerthatcoverstheholesinthebottomoftheuppersection(Figure4)Straighten
thethermocouplewireswheretheywerebentata90°angle
7 Withdrawthethermocoupledownintothelowerrearofthefurnacethroughtheholesintheupperand 
 lowersectionsDiscardthermocoupleassembly
8 Feedthenewthermocouplefromthelowerrearofthefurnaceupthroughtheholesintheupperandlower
 sectionsandintotheupperrearofthefurnace
9 Bendthenewthermocouplewiresata90°angleapproximately3-3/8inches(86cm)fromtheexposed
 tipofthethermocoupleBesurethattherearethreeceramicinsulatingsleevesbetweenthethermocouple
 tipandthebendInsertthenewthermocoupleintotheholeattherearoftheheatingchamber
10ReplacetheheatingplatewirethatwasremovedinStep3Checkthatthereisaceramicinsulatingsleeve
 coveringthethermocouplewireswheretheycrosstheheatingplatewireReplacetheclampthatholdsthe
 thermocouplewirestotheceramicterminalblockReplacetheinsulatingfillerthatcoverstheholesinthe
 bottomoftheuppersection
11ConnectthethermocouplewirestothethermocoupleterminalsontheMainPCBoardObservethecolor
 codingyounotedinStep2
12Replacethefrontpanelandtheupperandlowerrearpanels(Besuretheventlouversontherearpanels
 protrudeoutandfacedown)
FIELD SERVICE
REPLACEMENT OF THE THERMOCOUPLE ASSEMBLY (PN 18913)
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