Ideal Boilers FF 350, Installation And Servicing

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28 Classic FF -
Propane Installation & Servicing
SERVICING
1. Remove the 2 silicon rubber tubes from the fan sensing
points.
2. Disconnect the fan leads.
3a. Rear flue
Slacken the M4 screw securing the flue connector to the
fan. Disconnect the connector from the fan and slide
into the flue.
3b. Side or top flue
Slacken off two M4 screws securing the flue elbow and
flue connector. Disconnect the flue connector from the
elbow and slide into the flue. Remove the flue elbow.
4. Disconnect the silicon rubber tube from the rear of the
collector hood.
5. Slacken the two M5 nuts on the front tie rods, releasing
the tie rods from the combustion chamber.
6. Remove the M5 central fixing screw at the rear of the
collector hood and remove collector hood/fan assembly.
7. Check that the fan impeller runs freely. Remove any
debris from the impeller with a soft brush.
8. Remove the flue baffles.
52 CLEANING THE FAN ASSEMBLY / THE FLUEWAYS
1. Brush off any deposits that may have fallen on to the
burner head, ensuring that the flame ports are
unobstructed, and remove any debris that may have
collected. Note.
Brushes with metallic bristles must not
be used.
2. Remove the main burner injector and ensure that there is
no blockage or damage. Clean or renew as necessary.
3. Refit the injector, using an approved jointing compound
sparingly.
4. Inspect the pilot burner and ignition / detection electrode.
Ensure that they are clean and in good condition.
Check that:
a. The pilot burner injector is not blocked or damaged. Refer
to Frame 61 for removal details.
b. The pilot burner is clean and unobstructed.
c. The ignition / detection electrode is clean and
undamaged.
d. The ignition / detection lead is in good condition.
e. The spark gap is correct (Frame 61). Clean or renew as
necessary.
Note. The pilot shield is located around the pilot assembly
bracket and is located by the electrode retaining nut.
54 REASSEMBLY
Reassemble the boiler in the following order:
1. Refit the flue baffles.
2. Inspect the collector hood rope gasket and replace, if
necessary, ensuring that the self adhesive rope is fitted
centrally onto the lip of the collector hood / fan assembly.
The boiler efficiency will be adversely affected if
incorrectly fitted. Refit the collector hood and retain with
the 2 front tie rods and the rear central fixing screw.
Tighten the nuts and screw. Ensure that the sealing
gasket is compressed. Refit the pressure pipe.
3. Refit the positive pressure tubes on the top of the fan
housing. Reconnect the electrical leads.
4. Refit the air box assembly and burner. Ensure that the
burner front fixing is refitted.
53 CLEANING THE BURNER AND PILOT ASSEMBLY
9. Remove all loose deposits from the heat exchanger,
particularly between the fins, using a suitable brush.
10. Reassemble in reverse order, ensuring the fan leads
and 3 sensing tubes are reconnected.
5. Reconnect the gas supply and the electrical wiring.
Refer to Frames 36 & 38.
6. Check the sightglass in the boiler casing. Clean or
renew as necessary. Refer to Frame 57.
7. Check for gas soundness. Check the gas service cock
and pressure test point.
8. Refit the boiler casing (refer to Frame 46). Note that it is
not necessary to disturb the controls casing pod.
9. Close the controls pod door.
SER
VICING