Maintenance
4
Installation and servicing instructions condensing gas boiler 800 - 24/29/43/60 and 800 - 24T25/29T25 H/V • edition 02/2006
33
Subject to modifications resulting from technical improvements !
Buderus • http://buderus-domestic.co.uk
4
Maintenance
For further information, please refer to subsection 7.2 "Inspec-
tion and service reports" on page 64 and fill out the
Benchmark
.
Preparations
z
Disconnect the system from the power supply.
z
Close the gas service valve.
z
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.
z
Loosen the screw couplings of the gas injector
(fig. 44, item 1).
z
Pull off the hose leading to the fan (fig. 44, item 2).
z
Pull off the hoses at the differential pressure measuring
point (fig. 44, item 3).
z
Pull off the wiring of the burner thermostat (fig. 44, item 4).
z
Pull off the plug of the fan (fig. 45, item 1).
z
Turn and pull out the safety retainer of the fan
(fig. 45, item 2).
fig. 44 Disconnecting
1 2
10
0 1
11
KW
10
1
10
1
4
1
3
2
1
2
fig. 45 Removing the fan
1
2
