4
Maintenance
For further information, please refer to subsection 7.2
"Inspection and service reports" on page 68 and fill out
the Benchmark.
Preparations
Disconnect the system from the power supply.
Close the gas service valve.
Remove the boiler casing (fig. 5 on page 11).
4.1
Cleaning the heat exchanger, burner
and syphon
The heat exchanger can be cleaned with a brush and
compressed air.
Loosen the screw couplings of the gas injector
(fig. 44, item 1).
Pull off the hose leading to the fan (fig. 44, item 2).
Pull off the hoses at the differential pressure measur-
ing point (fig. 44, item 3).
Pull off the wiring of the burner thermostat (fig. 44,
item 4).
Pull off the plug of the fan (fig. 45, item 1).
Turn and pull out the safety retainer of the fan
(fig. 45, item 2).
Wall-mounted condensing gas boiler Buderus 800 - Subject to modifications resulting from technical improvements!
4
fig. 44
Disconnecting
fig. 45
Removing the fan
Maintenance
4
3
1
2
2
11
KW
0 1
1 2
10
10
1
10
1
1
1
35