Beckett AFII Manual De Usuario

AFII Burner Manual

The following guidelines are provided for routine 
maintenance. 

Replace the oil supply line fi lter. The line fi lter 
cartridge must be replaced to avoid contamination 
of the fuel unit and nozzle.

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

Remove and clean the pump strainer if applicable.

Replace the nozzle with an exact replacement as 
specifi ed by the appliance manufacturer.

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

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

Inspect the igniter cables and connections.

Clean the cad cell grid surface, if necessary.

Inspect all gaskets. Replace any that are damaged 
or would fail to seal adequately.

Inspect the combustion head and air tube. Remove 
any carbon or foreign matter. Replace all damaged 
units with exact parts.

Clean the blower wheel, air inlet, air guide, burner 
housing and nozzle line assembly of any lint or 
foreign material.

If 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.

Check motor current. The amp draw should not 
exceed the nameplate rating.

Check all wiring for secure connections or insulation 
breaks.

Check the pump pressure and cutoff function.

Check primary control safety lockout timing.

Check ignition system for proper operation.

Inspect the vent system and chimney for soot 
accumulation or other restriction.

Clean all fl ue passages and fl ue pipe. Replace 
corroded or damaged pipes.

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

Check the burner performance. Refer to the section 
“Set combustion with test instruments”.

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

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Natural Draft Applications; typically over-fi re draft 
is -0.01” or   -0.02” w.c. 
Direct Venting; typically may not require draft 
adjustment.
High Effi ciency/Positive Pressure Appliances; 
also vary from traditional appliances (see 
manufacturer’s recommendations).

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.)   Example: 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

Once combustion is set, tighten all fasteners on air 
dial, rear access door, and escutcheon plate.
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 manufacturer’s 
specifi cations.

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DO NOT TAMPER WITH THE UNIT OR 
CONTROLS - CALL YOUR SERVICE PERSONNEL.
To ensure continued reliable operation, a qualifi ed 
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.

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