Beckett AFG, Oil Burner manual Perform regular maintenance, Replace the blower wheel

Perform regular maintenance

!WARNING Annual Professional Ser- vice Required

Tampering with or making incorrect adjustments could lead to equip- ment malfunction and result in asphyxiation, explosion or fire.

yDo not tamper with the burner or controls or make any adjustments unless you are a trained and qualified service technician.

yTo ensure continued reliable operation, a quali- fied service technician must service this burner annually.

yMore frequent service intervals may be required in dusty or adverse environments.

yOperation and adjustment of the burner requires technical training and skillful use of combustion test instruments and other test equipment.

ˆReplace the oil supply line filter. The line filter car- tridge must be replaced to avoid contamination of the fuel unit and nozzle.

ˆInspect the oil supply system. All fittings should be leak-tight. The supply lines should be free of water, sludge and other restrictions.

ˆRemove and clean the pump strainer if applica- ble.

ˆReplace the nozzle with an equivalent nozzle.

ˆClean and inspect the electrodes for damage, re- placing any that are cracked or chipped.

ˆCheck electrode tip settings. Replace electrodes if tips are rounded.

ˆInspect the igniter spring contacts.

ˆClean the cad cell grid surface, if necessary.

ˆMake sure Low Firing Rate Baffle is in place if required for the burner application. Omitting the baffle can result in unacceptable burner combus- tion.

ˆInspect all gaskets. Replace any that are dam- aged or would fail to seal adequately.

ˆInspect the compustion head and air tube. Re- move any carbon or foreign matter. Replace all damaged units with exact parts.

ˆClean the blower wheel, air inlet, air guide, burner housing and static plate of any lint or foreign ma- terial.

ˆIf motor is not permanently lubricated, oil motor with a few drops of SAE 20 nondetergent oil at each oil hole. DO NOT over oil motor. Excessive oiling can cause motor failure.

ˆCheck motor current. The amp draw should not exceed the nameplate rating by more than 10%.

ˆCheck all wiring for secure connections or insula- tion breaks.

ˆCheck the pump pressure and cutoff function.

ˆCheck primary control safety lockout timing.

ˆCheck ignition system for proper operation.

ˆInspect the vent system and chimney for soot ac- cumulation or other restriction.

ˆClean the appliance thoroughly according to the manufacturer’s recommendations.

ˆCheck the burner performance. Refer to the sec- tion “Set combustion with test instruments”.

ˆIt is good practice to make a record of the service performed and the combustion test results.

Replace the blower wheel:

1.Turn off all power to the burner before servic- ing.

2.Disconnect the burner motor wires.

3.Remove the bolts securing the motor to the burner housing.

4.Remove the motor and blower wheel.

5.Remove the existing blower wheel.

6.Referring to the figure below, slide the new blower wheel onto the shaft.

yUse a feeler gauge to set the wheel-to-motor gap, as shown below. (AF = 0.125 +1/64 inch, AFG = 0.030 +1/64 inch)

ySlide blower wheel toward motor until it con- tacts feeler gauge.

yRotate the blower wheel until the setscrew is centered on the flat of the motor shaft. Tighten the setscrew to secure the wheel.

7.DO NOT use a motor that has endshield open- ings outside the blower wheel circumference (represented by the dashed line).

8.Install the motor on the burner housing. Tighten screws. Reconnect wires.

9.Restore power, start the burner and perform combustion tests. Refer to the section “Set combustion with test instruments”.

Figure 8. Blower wheel assembly

Use a Feeler Gauge to set the gap to;

AF = 0.125 +1/64 inch AFG = 0.030 +1/64 inch

SK9190

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