Buderus 800 - Maintenance; 4.1 Cleaning the heat exchanger, burner and syphon

Maintenance 4
Wall-mounted condensing gas boiler Buderus 800 - Subject to modifications resulting from technical improvements!
35
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).
fig. 44 Disconnecting
1
2
10
0
1
11
KW
1
0
1
1
0
1
4
1
3
2
1
2
fig. 45 Removing the fan
1
2