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Carver Sb1800 Removal


speedy555

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Can anyone tell me how the SB1800 fires come out? I know how to remove the front, and can see where the gas connects underneath. ...and I can see 4 very rusty studs/nuts underneath, and 2 wing nuts (Which seem to be turning the stud too :( )...If they undo, is that pretty much it?

Thanks

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There are also Philips screws that are undone from inside the van, spaced around the outside edge of the floor plate (usually 5 or 6).

Don't forget to get a gas test done if the pipe work soundness is breached! :huh:

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If you are overhauling this heater for continued use, the original rusty main feed pipe to the burner should be replaced with copper . Take the pipe and it`s unions to a local gas fitter as a pattern and a newly made one will give a basically very good heater lots more years of use . The burner will probably benefit from the holes being pricked with a strand of wire to clear obstructions and tapping with something like a screwdriver handle to shake the rubbish out of it . Alternatively, ARC Systems is a specialist and has a web page .

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There are two models, later ones have self tappers holding the full size base plate too the floor, early ones have a much smaller base plate and is clamped through the floor with 4 x M5 studs with 8mm brass nuts, simply way to get these out is let the studs shear and then replace them with stainless 'all thread'

 

The two wing nuts also seize solid but these often don't need removing if the 'air filter' is along the same line as the fire, if it's been correctly spun out too one side, try turning it back in-line, if it's stiff try some lubrication and or heat around the edge of the metal discs top and bottom

 

I have new burner/gas feed pipes as well as other spares such as 'hook' bolts holding the filter on, however if decent penetrating oil does not free them, (ie, don't waste your time with WD40!), a 5mm drill through the side of the brass wing nut and then splitting it saves the bolts. Use nuts to replace the wing nuts

 

I would not advise poking anything through the burner gauze,( also never poke anything through the gas jet holes), nothing stronger than a soft brass brush is all that's required, cleaning the inside of the burners is best with a test tube brush or something similar and finishing with an air line from above, an air line is also useful cleaning the jet bar

gary1s.gif

 

Arc Systems are specialist Carver caravan product repairers, committed to providing a comprehensive service as well as spare parts for these popular heaters.

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Thank you. Its all operational, good flame, hot, but the flame is all yellow on all but the lowest setting. The caravan is a 1980, and sounds like the earlier type you describe.

Thanks. Dave

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Unless someone has already been playing with the jets and over sized them, yellow flame is probably due to something clogging the inside of the four burner tubes, usual culprit is spiders and or their webs.

Care must be taken to remove all traces, do not use an airline straight away, remove any web with a test tube cleaner or similar, anything then left blow away with air down through the top of the burner

gary1s.gif

 

Arc Systems are specialist Carver caravan product repairers, committed to providing a comprehensive service as well as spare parts for these popular heaters.

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Managed to get this out today thanks. ...however, all 4 studs sheared, and the two with the wing nuts, the burner gauze is almost all rotted away, and thank god I only lit it briefly, as 1 gas pipe was dodgy but the small one actually perforated! How it lit is a mystery, but how it didnt blow up is a miracle! lol Ive never even bothered to clean the burner at this point. ..

 

Anyway, Im thinking is it really worth fixing so much - Ive been offered a carver caravelle (4?) and wondered if anyone knew if it fitted the same 'box'and if it fitted through the floor the same?? Thanks again

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That is indeed well beyond worth fixing, there are plenty turning up on ebay for pennies, look out for dark green gas pipes and you'll have a later one or the pipes have already been replaced. The later one with full size base plate is interchangeable

 

As for the '4' I would not recommend it, it having plenty of problems of it's own, it's also a total different design and nothing is interchangeable, so no, it will not fit the old ones 'box' however, all fires fit the same cut-out in the wood. work.

 

The '4' actually only refers to the control switch design but this 4th switch was one too many and led directly to the design being dropped in 1989 due to constant problems.

 

I would suggest you keep hold of the old ones gas valve, thermocouple, control knobs and extension rod, these being rare and often fetch a bit on ebay

gary1s.gif

 

Arc Systems are specialist Carver caravan product repairers, committed to providing a comprehensive service as well as spare parts for these popular heaters.

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Thanks so much for your help again. Ive also seen this one advertised at a local-ish breakers, but unfortunatey have no idea if it is a '4' or not. ..or see the green pipes (If it has them!).....maybe its me but Im struggling to find one suitable, and really need a fire back in and connected up. The search continues! Thanks.

 

Also seen an 1800sc whatever that variety is! lol

 

 

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