34
Response 80 / 100 / 120
- Installation
49
FAN REMOVAL AND CLEANING
1. Disconnect the pressure sensing pipe as
follows:
a.
Undo the single top fixing screw on
the fan inlet venturi and slacken the
other 2 location screws.
b.
Undo the 2 screws securing the
sensing pipe to the manifold block.
c.
Slide the fan inlet venturi upward to
disengage and remove the venturi
and sensing pipe assembly.
2. Disengage the fan retention clip and rotate
the fan body to the right, to disengage the
bayonet fixing on the fan outlet.
3. Disconnect the electrical harness from the
fan.
4. Withdraw the fan with the 'O' ring seal.
5. Check that the fan impeller runs freely.
Clean with a soft brush or renew as
necessary. Refer to Frame 65 for
replacement.
Note.
Always take care when handling the fan,
in order to preserve the balance of the
impeller.
50
BURNER REMOVAL AND CLEANING
6. Check the spark and electrode gaps are correct.
7. Check that the spark and detection leads are in good
condition and renew as necessary
1. After removing the fan, as already described, disconnect
the 2 ignition leads and one detection lead from the
electrodes.
2. Undo the 3 fixing screws securing the burner assembly.
3. Withdraw the burner assembly downward and out of the
heat exchanger.
4. Brush off any deposits that may have collected on the
burner, ensuring that the flame ports are unobstructed.
Note.
Brushes with metallic bristles MUST NOT be used.
5. Inspect the spark and detection electrodes. Ensure they
are clean and in good condition - replace if necessary.
SERVICING
SER
VICING
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