Burner Assembly Hiflo Range; The Burner Assembly Should Be Checked And Cleaned Annually - andrews 24/39 Installation And Service Manual

6 Servicing
6.4

Burner assembly HIflo Range

46
5. Remove two screws securing main burner supply tube to
bottom of burner to gain access to main jet. Remove main jet
and clean with acetone. Blow through main burner with
compressed air.
CLEAN ORIFICES WITH WOOD SPLINTER. DO NOT USE
SHARP METALLIC OBJECTS.
6. Re-assemble in reverse order of steps 2 - 5, but note:
i) Be sure to engage rear section of main burner supply pipe in
it's location bracket on base pan of heater.
ii) DO NOT OVERTIGHTEN THE THERMOCOUPLE
CONNECTION. SCREW IN FINGER TIGHT THEN
TIGHTEN A FURTHER 1/4 TURN USING A SPANNER.
iii) Replace and secure inner cover with two screws on Models
63/62 and 84/87.
7. Turn gas control knob to PILOT and depress. Using leak
detection fluid, check joints at both ends of the pilot supply
tube. Seal if necessary. DO NOT EXAMINE WITH A NAKED
FLAME.
8. Allow 3 minutes for unburnt gas to disperse. Light the pilot
and check flame is correct. (see Fig. 19). Slide inner
door to left (on Models 63/62 and 84/87, lower the inspection
port) and turn gas control knob to ON. The main burner will
light.
9. Check main burner connection tube at control valve with leak
detection fluid and seal if necessary. Replace outer cover.
6.4.1 The burner assembly should be checked and
cleaned annually.
Note
Models 62/341, 54/418 and 54/440 are fitted with an
anchor bracket between the burner manifold and heater
body. Take out 2 screws to remove.
1. Turn gas control valve knob to OFF and disconnect union
joint from gas service cock.
2. Disconnect thermostat connections (black, red and white
wires) from gas control valve.
3. Remove two screws and slide out burner assembly.
4. Disconnect pilot tube and thermopile connections from gas
valve. Remove two screws and withdraw pilot/thermopile
assembly.
5. Unscrew two wing nuts and remove draught shield. Remove
four screws and disconnect manifold from burner tray.
6. Clean burners by brushing internally and externally and by
blowing through with compressed air. Do not remove
individual burners from the burner tray.
Issue 2 14/07/16