Benchmark MAIN, Инструкция по установке и обслуживанию

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14.0 Changing Components
© Baxi Heating UK Ltd 2007
IMPORTANT: When changing components ensure that
both the gas and electrical supplies to the boiler are
isolated before any work is started. When the new
component has been fitted turn the selector switch fully
anticlockwise against the spring pressure to the ‘Reset’
position and hold for 2 seconds to reset the boiler
before recommissioning.
See Section 13.1 “Annual Servicing” for removal of case
panel, door etc.
14.1 Fan (Figs. 59 & 60)
1. Note the positions of the sensing tube(s) (28 HE has two
- one tube on 18 & 24 HE) on the fan spigot and three
wires on the fan motor and remove them.
2. Slacken the screws on the fan spigot outlet pipe clamps.
Ease the clamps inwards over the pipe (28 HE). On 18 &
24 HE models undo the securing screw at the left hand end
of the pipe and the clamp at the right.
3. Draw the outlet pipe away from the boiler.
4. Remove the four screws securing the combustion box
door and remove the door.
5. Ease the front edge of the left hand baffle upwards,
disengaging the spring clip. Disengage the tabs on the baffle
from the slots in the fan hood.
6. Undo the screws securing the fan hood to the appliance
back panel, and draw the fan and hood assembly forwards.
7. Remove the screws and spring washers securing the fan
to the hood.
8. Fit the new fan to the hood using the screws and spring
washers previously removed.
9. Reassemble in reverse order of dismantling.
14.2 Pressure Switch (Fig. 58)
1. Remove the fan as described in section 14.1.
2. Note the positions of the two sensing tubes and three
wires and remove them.
3. Remove the two screws holding the pressure switch to
the bracket on the combustion box top panel.
4. Fit the new pressure switch and reassemble all
components in reverse order of dismantling.
Pressure
Switch
Sensing
Tubes
Pressure
Switch Wires
Fig. 58
Fan Hood
Spring Washer
Securing Screw
Fan Wires
Fan
Sensing
Tubes
Ease Fan Spigot Outlet Pipe
Clamps Inwards
Fan Spigot Outlet Pipe
Spring Clip
Baffle
Tab
Fan
Fig. 59
Fig. 60
28 model
18 & 24
models