43
Henrad SEC FF -
Installation
62 FAN UNIT REPLACEMENT
1.
Refer to Frame 60.
2.
Remove the boiler casing. Refer to Frame 53.
3.
Remove the boiler sealing panel. Refer to
Frame 54.
4.
Undo the fan inlet venturi top securing screw.
5.
Slacken the other 2 securing screws.
6.
Slide the venturi upward to disengage the
sensing pipe from the gas manifold.
7.
Withdraw the venturi, complete with sensing
pipe, from the boiler.
8.
Depress the retaining clip and rotate the fan
to the right to disengage the bayonet fixing
on the fan outlet.
9.
Draw the fan forward and unplug the
electrical lead from the motor.
10.
Withdraw the fan from the boiler.
Note.
Always take care when handling the
fan, in order to preserve the balance of the
impeller.
11.
Transfer the fan outlet adaptor to the new fan,
renewing any damaged or deteriorating
gasket.
SERVICING
Legend
A
Venturi
B
Sensing pipe
63 BURNER REPLACEMENT
Legend
A
Burner
B
Gasket
C
Burner mounting flange
D
'O' ring seal
Note.
Check the spark and detection
gaps. Refer to Frame 56.
1.
Refer to Frame 60.
2.
Remove the boiler casing. Refer to Frame 53.
3.
Remove the boiler sealing panel. Refer to Frame 54.
4.
Remove the fan assembly. Refer to Frame 55.
5.
Disconnect the ignition and detector leads.
6.
Undo the 3 fixing screws securing the burner assembly.
7.
Withdraw the burner assembly downward and out of the
heat exchanger.
8.
Remove the 3
securing
screws and
withdraw the
burner from
the mounting
flange.
9.
Fit the new
burner,
replacing any
damaged or
deteriorating
gasket.
10.
Re-assemble
in reverse
order ensuring
that the 'O' ring
seal in the
burner
mounting
flange is in
place.
12.
Fit the new fan in reverse order, ensuring that the
'O' ring seal in the fan outlet adaptor is in place.
13.
Check the operation of the new fan.
SER
VICING