Beckett 150 Manuel D’Utilisation

 

Instruction Manual – 

Model AFII Oil Burner 

Startup & adjust burner 

 

 Service & maintain burner 

 

   Do not attempt to start the burner when excess fuel or vapor 

has accumulated in the appliance. Starting the burner under these conditions 
could result in a puffback of hot combustion gases, high smoke levels, or 
otherwise hazardous operation. 

   

      This equipment must be serviced only by a qualified service 

agency. The appropriate test instruments must be used. Failure to do so could 
result in burner or appliance failure, causing potential severe personal injury, 
death or substantial property damage. 

1.  Open the shutoff valves in the oil supply line to the burner. 

 

Replace the oil supply line filter. The line filter cartridge must be replaced 

to avoid contamination of the fuel unit and nozzle. 

2.  Open the air dial. This is an initial air setting for the pump bleeding 

procedure only. Additional adjustments must be made with instruments. 

 

Inspect the oil supply system. All fittings should be leak-tight. The supply 

lines should be free of water, sludge and other restrictions. 

3.  Set the thermostat substantially above room temperature. 
4.  Close the line voltage switch to start the burner. If the burner does not 

start immediately you may have to reset the safety switch of the burner 
primary control. 

 

Remove and clean the pump strainer if applicable. 

 

Replace the nozzle with an equivalent nozzle. 

 

Clean and inspect the electrodes for damage, replacing any that are 

cracked or chipped. 

5.  Bleed air from the fuel unit as soon as burner motor starts rotating. 

 

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

To bleed the fuel unit, attach a clear plastic hose over the vent fitting. 
Loosen the fitting and catch the oil in an empty container. Tighten the 
fitting when all air has been purged from the oil supply system. 

 

Inspect the igniter cables and connections. 

 

Clean the cad cell grid surface, if necessary. 

 

Make sure the burner housing baffle is in place if required for the burner 

application (AFII 85 & AFII 100). Omitting the baffle can result in 
unacceptable burner combustion. 

•  If the burner locks out on safety during bleeding, 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. 

 

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

adequately. 

•  If burner stops after flame is established, additional bleeding is 

probably required. Repeat the bleeding procedure until the pump is 
primed and a flame is established when the vent fitting is closed. 

 

Clean the blower wheel, air inlet, air guide, and retention head 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. 

•  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 ¼" sampling hole in the flue 

pipe between the appliance and the barometric draft regulator. 

 

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

rating by more than 10%. 

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. 

 

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. 

                 The  combustion  must  be  adjusted  using  test  instruments. 

Failure to do so could result in burner or appliance failure, causing potential 
severe personal injury, death or substantial property damage. 

 

Clean the appliance thoroughly according to the manufacturer's 

recommendations. 

1.  Let burner run for approximately 5 to 10 minutes. 

 

Check the burner performance. Refer to the section “Set combustion 

with instruments”. 

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

(usually –0.01 to –0.02 inches w.c. over-fire for natural draft applications). 

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

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

Step 1:  Adjust air until a trace smoke level is achieved 

Step 2:  At the trace of smoke level, measure the CO

2

 (or O

2

). This is 

the vital reference point for further adjustments. 

1.  Turn off all power to the burner before servicing. 

• Example: 13.5% CO

2

 (2.6% O

2

) 

2.  Disconnect the burner motor wires. 
3.  Remove the bolts securing the blower motor to 

the housing. 

Step 3:  Increase the air to reduce CO

2

 by 1 to 2 percentage points. (O

2

 

will be increased by approximately 1.4 to 2.7 percentage points.) 

4.  Remove the blower motor and wheel. 

• Example: Reduce CO

2

 from 13.5% to 11.5%. (O

2

 – 2.6% to 5.3%) 

5.  Remove the existing wheel. 

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

6.  As shown at right, slide the new blower wheel 

onto the shaft. 

• This procedure provides a margin of reserve air to accommodate 

variable conditions. 

•  Place a .062" (1/16" ± 1/64") feeler gauge on 

the motor as shown. 

• If the draft level has to be changed, recheck the smoke and CO

2

 

levels. Adjust the burner air if necessary. 

•  Slide blower wheel toward motor until it 

contacts feeler gauge. 

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

and escutcheon plate. 

•  Rotate the wheel until the setscrew is 

centered on the flat of the motor shaft. 
Tighten the setscrew to secure the wheel. 

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 manufacturer’s specifications. 

SK9190A 

7.  DO NOT use any motor other than the original equipment type motor. 

 

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 instruments”.