Beckett AFII 100, FII 85, AFII 150 manual Trained Service Technician’s Regular Maintenance

Trained Service Technician’s Regular Maintenance

•If the burner locks out on safety during bleed- ing, reset the safety switch and complete the bleeding procedure. Note — Electronic safety switches can be reset immediately; others may require a three- to five-minute wait.

•If burner stops after flame is established, addi- tional bleeding is probably required. Repeat the bleeding procedure until the pump is primed and a flame is established when the vent fitting is closed.

•For R7184 primary controls, see Technician’s Quick Reference Guide, part number 61351 or 61465, for special pump priming sequence.

•Prepare for combustion tests by drilling a 1/4” sampling hole in the flue pipe between the ap- pliance and the barometric draft regulator.

6.Initial air adjustment — Using a smoke tester, adjust the air dial (and change firing pin on HLX ATC’s, if necessary) to obtain a clean flame. Now the additional combustion tests with instruments can be made.

•Set combustion with instruments

1.Allow the burner to run for approximately 5 to 10 minutes.

2.Set the stack or over-fire draft to the level speci- fied by the appliance manufacturer.

•Natural Draft Applications; typically over-fire draft is -0.01” or -0.02” w.c.

•Direct Venting; typically may not require draft adjustment.

•High Efficiency/Positive Pressure Applianc- es; also vary from traditional appliances (see manufacturer’s recommendations).

3.Follow these four steps to properly adjust the burner:

Step 1: Adjust the air dial until a trace of smoke is achieved.

Step 2: At the trace of smoke level, measure the CO2 (or O2) . This is the vital reference point for further adjustments. Example: 13.5% CO2 (2.6% O2)

Step 3: Increase the air to reduce the CO2 by 1.5 to 2 percentage points. (O2 will be increased by approximately 2.0 to 2.7 percentage points.) Ex- ample: Reduce CO2 from 13.5% to 11.5% (2.6% to 5.3% O2).

Step 4: Recheck smoke level. It should be Zero.

•This procedure provides a margin of reserve air to accommodate variable conditions.

•If the draft level has changed, recheck the smoke and CO2 levels and readjust the burner if necessary

4.Once combustion is set, tighten all fasteners on air dial, rear access door, and escutcheon plate.

5.Start and stop the burner several times to ensure satisfactory operation. Test the primary control and all other appliance safety controls to verify that they function according to the manufactur- er’s specifications.

Trained Service Technician’s 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.

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

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

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

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

The following guidelines are provided for routine maintenance.

ˆReplace the oil supply line filter. The line filter cartridge must be replaced to avoid contamina- tion 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 appli- cable.

ˆReplace the nozzle with an exact replacement as specified by the appliance manufacturer.

ˆClean and inspect the electrodes for damage, replacing any that are cracked or chipped.

ˆCheck electrode tip settings. Replace elec- trodes if tips are rounded.

ˆInspect the igniter cables and connections.

ˆClean the cad cell grid surface, if necessary.

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

ˆInspect the combustion 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 nozzle line assembly of any lint or foreign material.

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