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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 274
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Fit new plate heat exchanger.
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Renew the four O-rings if necessary.
z
Refit the plate heat exchanger and secure with the two
screws.
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Open the cold water service valve.
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Open the hot water tap in order to clean the new plate heat
exchanger (inside).
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Close the hot water tap.
z
Fill the heating system, see box 52.
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Fit the casing and place the boiler into operation,
box 275 Replace the pressure relief valve
z
Take the boiler out of operation and drain the heating
system, see box 48 to 50.
box 276
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Remove the stop spring (item 2) of the pressure relief
valve.
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Remove the pressure relief valve (item 1) in the direction
of the arrow.
box 277
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Release the pressure relief valve from the section of
condendsate outlet pipework by pulling in the direction of
the arrow.
1
2
box 278
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Fit the new pressure relief valve and all other components
by following the above procedure in reverse.
z
Fill the heating system, vent it of air and place the boiler
into operation, see box 52 to 58.
box 279 Replace the turbine flowmeter
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Remove the stop spring.
box 280
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Use a screwdriver to lever out the turbine flowmeter.
box 281 Replace the DBA control panel
H
DANGER OF FATAL ACCIDENT
due to electric shock
z
Take the boiler out of operation and remove the DBA
control panel, see box 43, 44, 47, 63 or 70.
