Glow-worm Ultracom2 sxi - Page 49

0020112600_02-10/12-Glow-worm
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MAINTENANCE

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
• Disconnecttheelectrodecap(7)andtheearthingcable(6).
• Removethe2sparkelectroderetainingscrews(8).
• Carefullyremovetheelectrode(10)fromthecombustion
chamber.
• Removethegasket(9).
• Checkthatthedistancebetweenthe2electrodesisbetween
3.5and4.5mm.
• Installtheelectrodeandanewgasket.
 
• Removetheignitionlead(2).
• Removeelectricalconnections(4).
• Loosenthescrews(3)locatedontheigniterunit(2).
• Removetheigniterunit(2).
 

b
Warning: The burner door seal (13) must be
replaced each time the combustion/burner door
assembly is removed.
• Disconnectthesparkelectrodecap(7)fromtheigniterunit.
• Disconnectthegassupplypipe(36)atthegasvalve.
• Removetheelectricalconnectorsfromthegasvalve(37)
andthefan(34).
• Removetheretainingscrewofthesilencer.
• Loosenthe4nuts(12).
• Removethecombustion/burnerdoorassemblyfromtheheat
exchanger(11).
• Thestuds(19)mustnotbedamaged.Ifdamagedyouwill
needtoreplacetheheatexchanger.
• Thecombustion/burnerdoorassemblyinsulationshouldbe
inspectedandreplacedifdamaged.
 
• Removethe3burnerretainingscrews(16).
• Removetheburner(15)andthegasket(14).
• Fitthenewburnerandthenewgasket.
 
b
There will be water in the heat exchanger.
Carefully ease heat exchanger out.
• Draintheboilerheatingandhotwatercircuitsasdescribedin
theappropriatechapter"Draining".
• Removetheueconnection.
• Undothetwoscrewslocatedonthetopofeachsidepanel.
• Removethethermalfuseconnector(20).
• Removethe2heatingpiperetainingclips(25)and(29).
• Releasetheheatingpipes(24)and(27)fromtheheat
exchanger.
• Releasethecondensatetrappipefromtheheatexchanger.
• Removethecombustion/burnerdoorassembly(11)
referingtochapter"Removingthecombustion/burnerdoor
assembly".
• Unscrewthe4retainingscrews(17)and(23)andremove
the2retainingplates(18)and(22)fromtheheatexchanger.
• Pulltheheatexchangertowardsyoutoextractitfromits2
siderails.