Buderus 800 - Page 50

Servicing5
Wall-mounted condensing gas boiler Buderus 800 - Subject to modifications resulting from technical improvements!
50
5.3.6 Replacing the fan unit
 Loosen the screw couplings of the gas injector
(fig. 58, item 1) and safety valve (fig. 58, item 2).
 Pull off the hoses leading to the fan (fig. 58, item 3).
 Pull off the hoses at the differential pressure measur-
ing point (fig. 58, item 4).
 Pull out the plug of the burner thermostat (fig. 58,
item 5).
 Pull out the plug of the fan (fig. 59, item 1).
 Turn and pull out the safety retainer of the fan
(fig. 59, item 2).
 Push up the fan (fig. 60, item 1).
 Pivot the lower end of the fan forward (fig. 60, item 2)
and take it out downwards and forwards (fig. 60,
item 3).
 Replace the fan
 Reassemble in reverse order.
fig. 58 Disconnecting
1
2
10
0
1
11
K
W
1
0
1
10
1
4
1
3
2
1
2
NOTE
Please refer to fitting instructions for 230 V
fan unit.
fig. 59 Removing safety retainers
1
2
fig. 60 Removing the fan
1
2
3