Beckett AFG, Oil Burner manual Prepare the Burner

Outside air kit applications

Refer to separate instruction sheet supplied with AF/AFG outside air kit for installation. This optional kit allows combustion air to be piped directly to the burner (Beckett part number 51747).

Clearances to burner and appliance

yProvide space around burner and appliance for easy service and maintenance.

yCheck minimum clearances against those shown by the appliance manufacturer and by applicable building codes.

Combustion chamber — Burner retrofit- ting

Verify that the appliance combustion chamber pro- vides at least the minimum dimensions given in Table 3.

	Protect Steel Combustion
! WARNING
	Chamber From Burnout

Failure to comply could result in damage to the heating equipment and result in fire or asphyxi- ation hazards.

yWhen retrofitting appliances that have unlined stainless steel combustion chambers, protect the chamber by lining the inside surfaces with a ce- ramic fiber blanket, such as a wet-pac or other suitable refractory material.

ySome steel chambers may not require liners be- cause the appliance was designed and tested for use with flame retention burners. Refer to the manufacturer’s instructions.

Table 3. Chamber Dimensions

Chamber Dimensions (inches)

Firing	Round	Rectangular		Height	Floor to
Rate	I.D.				nozzle
		Width	Length
(GPH)
0.50	8	7	8	12	5-6
0.75	9	8	9	12	5-6
1.00	10	9	10	12.5	5-6
1.25	11	10	11	12.5	5-6
1.50	12	11	12	13	6-7
2.00	14	12	15	13.5	6-7
2.50	16	13	17	14	7-8
3.00	18	14	18	15	7-8

Prepare the Burner

Low Firing Rate Baffle

The AFG Low Firing Rate Baffle (LFRB) reduces the air flow and pressure. The LFRB is sometimes used for firing rates under 1.00 gph as listed in Table 4. Refer to the appliance manufacturer’s in- structions. Do not omit the LFRB when specified. Omitting the baffle when specified or installing the baffle when not specified could result in impaired burner performance.

Table 4. AFG Reduced Firing Rates (with

LFRB)

Burner head type	Low Firing Rate Baffle installed
F0	up to 0.65 gph
F3 or L1	up to 0.85 gph
F4 or F6	up to 0.90 gph
V1	up to 1.00 gph

Burner fuel unit

yVerify that the burner fuel unit is compatible with the oil supply system. For more details, refer to “Connect fuel lines” later in this manual.

Nozzle and Pump Pressure

!WARNING Correct Nozzle and Flow Rate Required

Incorrect nozzles and flow rates could result in impaired combus- tion, under-firing, over-firing, soot- ing, puff-back of hot gases, smoke

and potential fire or asphyxiation hazards.

Use only nozzles having the brand, flow rate (gph), spray angle and pattern specified by the appliance manufac- turer.

Follow the appliance manufacturer’s specifications for the required pump outlet pressure for the nozzle, since this affects the flow rate.

yNozzle manufacturers calibrate nozzle flow rates at 100 psig.

yWhen pump pressures are higher than 100 psig, the actual nozzle flow rate will be greater than the gph stamped on the nozzle body. (Example: A

1.00gph nozzle at 140 psig = 1.18 gph) Securely tighten the nozzle (90 torque inch pounds). For typical nozzle flow rates at various pressures refer to Ta- ble 5.

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