Changing Components - Potterton Performa 28 Installation And Servicing Instruction

Pressure
Switch
-'ve
bk
b
Fig. 45
br
Pressure
Switch Wires
Fan Wires
g/y
b
br
+'ve
-'ve
Fan and Hood
Assembly
Fan
Spring
Washer
Securing Screw
Fan Hood
Sensing
Tubes
+'ve
Sensing Tubes
Fig. 46
Spring Clip
Fig. 47

12.0 Changing Components

IMPORTANT: When changing components
ensure that both the gas and electrical
supplies to the boiler are isolated before any
work is started. When the component has
been changed 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 11.1 "Annual Servicing" for removal
of case panel, door etc.
12.1
1. Note the positions of the two sensing tubes
and three wires and remove them.
2. Remove the two screws holding the pressure
switch to the combustion box top panel.
3. Fit the new pressure switch and reassemble all
components in reverse order of dismantling.
12.2
1. Note the positions of the two sensing tubes on
the outlet elbow and three wires on the fan motor
and remove them.
2. Slacken the screws on the outlet sealing collar.
Ease the collar upwards as far as possible.
3. Remove the four screws securing the
Outlet Sealing
combustion box door and remove the door.
Collar
4. Remove the spring clips retaining the air box
side baffle plates. Disengage the tabs on the
baffles from the slots in the fan hood.
5. Undo the screws securing the fan hood to the
appliance back panel, and draw the fan and hood
Baffle
assembly forwards.
Tab
6. Remove the screws and spring washers
securing the fan to the hood.
7. Fit the new fan to the hood using the screws
and spring washers previously removed.
8. Reassemble in reverse order of dismantling.
Pressure Switch (Fig. 45)
Fan (Figs. 46 & 47)
27