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We reserve the right to make technical modifications
Buderus Ltd. • http://www.buderus-domestic.co.uk
Servicing manual Gas condensing boiler Buderus 500-24/S, 500-24/C and 500-28/C • Issued 02/2006
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box 250
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Fit the new burner to the gas/air unit. Note that a new seal
must be fitted between the burner and gas/air unit.
box 251
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Remove the heat exchanger-gas/air seal.
box 252
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Check the heat exchanger-gas/air seal for signs of ageing.
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Replace the heat exchanger-gas/air seal if required.
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Refit all components, following the above procedure in
reverse order.
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Open the gas cock and place the boiler into full-load
operation, see box 59, 54, 55 and 13.
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Carry out a gas-leak check. Check the tightness of all
components that were loosened in the course of removal
of the burner. Use an authorised foam-type leak detection
product for this purpose.
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Remedy the cause of the gas leak.
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Open the gas cock and place the boiler into operation,
see box 59, 54, 55 or 51.
box 253 Replace the sight glass
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Take the boiler out of operation, see box 43, 44 or 47.
box 254
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Loosen both screws (item 1).
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Remove the sight glass along with the seals.
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box 255
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Install the new sight glass. Use a new seal when doing so.
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Put the boiler into operation, see box 51, 54 or 55.
box 256 Replace/clean condensate trap and syphon
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Take the boiler out of operation, see box 43, 44 or 47.
box 257
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Remove the condensate trap (item 1) and syphon
(item 2).
box 258
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Clean the condensate trap and syphon.
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Fit the new or cleaned syphon.
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Put the boiler into operation, see box 51, 54 or 55.
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