Actions
7
We reserve the right to make technical modifications
Buderus Ltd. • http://www.buderus-domestic.co.uk
70
Servicing manual Gas condensing boiler Buderus 500-24/S, 500-24/C and 500-28/C • Issued 02/2006
box 259 Replace/clean the heat exchanger
H
DANGER OF FATAL ACCIDENT
due to electric shock
A
DANGER OF FATAL ACCIDENT!
All work on gas supply pipes and gas-fitting
components must be carried out by a company
registered and authorised for this purpose.
z
Take the boiler out of operation, close the gas cock and
drain the heating system, see box 46 or 48 to 50.
z
Remove the power supply plug of the glow ignitor,
z
Remove the plug of the ionisation electrode, see box 144.
z
Remove the power supply plug of the gas valve, union nut
and air silencer tube, see box 77.
z
Pull out both fan plugs, see box 78, item 1.
z
Remove the gas/air unit along with the burner,
z
Remove the heat exchanger-gas/air seal, see box 251.
box 260
z
Open the four clip fastenings(item 1).
z
Clean the heat exchanger with a brush and compressed
air or with TAB2.
In the event of serious restriction, continue with box 261.
1
1
1
1
box 261
z
Remove the restrictor baffle (item 1).
box 262
z
Remove the stop spring on the top left-hand side of the
heat exchanger by turning it towards the arrow.
box 263
z
Remove the stop spring on the bottom right-hand side of
the heat exchanger by turning it towards the arrow.
1
