Maintenance; Cleaning The Heat Exchanger And Burner - Buderus 500-24S Installation And Maintenance Instructions Manual

4

Maintenance

4 Maintenance
NOTE
The described cleaning of the burner and
heat exchanger is only necessary when the
boiler is heavily contaminated. Otherwise it is
sufficient to clean the burner and heat ex-
changer with a soft brush or compressed air
without disassembling them.
4.1 Cleaning the heat exchanger and
burner
V Switch the boiler off by setting the mains switch to "0"
( fig. 55, item 1).
V Close the gas shut off valve (
V Unlock the securing screw with a radiator key and
remove the casing.
V Loosen the gas connection between the gas supply
and the gas air unit (
V Replace the flat seal between the gas pipe and the gas
air unit ( fig 65.)
V Remove the connectors (
from the gas air unit.
V Remove the air silencer from the gas air unit (
item 4).
V Then remove the connectors of the glow ignitor
( fig. 66, item 5) and the ionisation electrode
( fig. 66, item 6).
44
fig. 56, item 1).
fig. 64).
fig. 66, item 1, 2 and 3)
fig. 66,
Buderus 500-24S - Subject to modifications resulting from technical improvements
1
Fig. 64 Loosen gas connection
Fig. 65 Replace the flat seal of the gas pipe
6
5
Fig. 66 Remove connectors of the gas air unit
7215 3100-65.1TD
7215 3100-081.1TD
1
2
3
4
7215 3100-066.2TD