andrews 24/39, Installation Manual, Operation And Service Manual

Page: 44 / 96

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REPLACING COMPONENTS, Hi-Flo RANGE SECTION 7
2. Disconnect thermopile and pilot supply pipe from gas control valve.
3. Remove two screws and withdraw burner assembly.
4. Remove two screws and withdraw pilot assembly.
5. Unscrew gland nut securing thermopile to it's bracket and withdraw.
6. Unscrew pilot feed pipe nut and withdraw pipe. The pilot injector will be left in the pilot
burner and may be withdrawn by inverting the burner and allowing it to fall out.
7. Re-assemble pilot assembly and connect pilot pipe only to gas control valve with the pilot
assembly outside the heater. Turn on gas service cock. Turn gas control to PILOT and
press knob, whilst testing pilot connection at gland nut for soundness with leak detection
fluid. Seal any leakages and re-test. Turn gas control valve and service cock to OFF.
8. Re-assembly is reverse of steps 2 to 5.
9. Light the heater in accordance with lighting instructions. All gas joints must be checked
for soundness using leak detection fluid. Turn off and seal any leakages. DO NOT
EXAMINE WITH A NAKED FLAME.
10. Re-light the heater and set thermostat to user's requirements.
NOTE! Models 62/341, 54/418 and 54/440 are fitted with an anchor bracket between the
burner manifold and the heater body. Remove two screws to release the anchor bracket.
1. Turn off the gas control and the service cock. Disconnect union joint on 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. Remove two screws to remove burner manifold and draught shields.
6. Remove two screws and remove burner fixing bracket.
7. Draw burner forwards to clear it's rear location slot. Replace with new burner.
8. Re-assembly is the reverse of steps 2 to 5.
9. Light the heater in accordance with the lighting instructions. All gas joints must be
checked for soundness using leak detection fluid. Turn off and seal any leakages. DO
NOT EXAMINE WITH A NAKED FLAME.
10. Re-light the heater and set thermostat to user's requirements.
THERMOPILE/
PILOT
BURNER/PILOT
RESTRICTOR
BURNER