42
Response FF80
- Installation
66 FAN UNIT REPLACEMENT
1.
Remove the front and sealing panels. Refer
to Frame 48.
2.
Disconnect the electrical leads from the fan.
3.
Disconnect the pressure sensing pipe from
the fan.
a.
Undo the 2 screws securing the pipe to
the fan.
b.
Undo the 2 screws securing the pipe
clamping plate to the manifold block.
c.
Withdraw the clamping plate.
d.
Withdraw the pipe from the boiler.
4.
Rotate the LH side of the fan body towards
you to disengage the bayonet fixing on the
fan outlet.
5.
Withdraw the fan.
Note.
Always take care when handling the
fan in order to preserve the balance of the
impeller.
6.
Fit the new fan ensuring that:
a.
All seals are correctly refitted.
b.
The sensing pipe clamping plate is
correctly refitted.
c.
The fan is fully engaged between the
two retaining dimples on the LHside
panel clip.
7.
Check the operation of the new fan.
SERVICING
67 AIR PRESSURE SWITCH REPLACEMENT
SER
VICING
1.
Disconnect the electrical supply to the boiler.
2.
Remove the front panel . Refer to Frame 48.
3.
Disconnect the wires from terminals 1 and 3.
4.
Remove the securing screws.
5.
Disconnect the sensing tube and remove the
switch.
6.
Fit the new switch and re-assemble in reverse
order.
7.
Make sure that the 2 brown wires are fitted to
terminals 1 and 3 (either to either).