Beckett AFII 150, FII 85, AFII 100 manual Removing Nozzle Line for Service, Nozzle Installation

Trained Service Technician’s Regular Maintenance

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. Exces- sive 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 in- sulation 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 accumulation or other restriction.

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

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

ˆIt is good practice to make a record of the ser- vice performed and the combustion test re- sults.

•Removing Nozzle Line for Service

!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 manufactur- er or Beckett Residential Burner OEM Spec Guide, Part #6711.

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

•Nozzle manufacturers calibrate nozzle flow rates at 100 psig.

•This burner utilizes pressures higher than 100 psig, so the actual nozzle flow rate will be greater than the gph stamped on the nozzle body. (Exam- ple: A 1.00 gph nozzle @ 140 psig = 1.18 gph)

For typical nozzle flow rates at various pressures see ac- companying chart.

1.Turn off power to burner before proceeding.

2.Disconnect copper oil connector tube from noz- zle line.

3.Loosen the screw that fastens the rear access door.

4.Remove splined nut.

5.Remove the nozzle line assembly from the burn- er, being careful not to damage the electrodes or insulators while handling. Stop halfway to remove igniter/transformer wires.

6.To replace the nozzle assembly, reverse the above steps. “HLX” head air tubes – Be sure stop screw is fastened securely. Seat stop screw on back of choke ring to set the position of the head. “FBX” head air tubes – Use T gauge to set the “Z” dimension to 1-1/8” +/- 1/32”

•Nozzle Installation

Perform the following steps when replacing a noz- zle.

1.Remove the nozzle line assembly to gain access to the nozzle.

2.Use a 3/4” open-end wrench to hold the nozzle adapter. DO NOT attempt to remove or replace the nozzle without securing the adapter, as noz- zle alignment could be seriously affected.

3.Do not squeeze the electrodes when handling the nozzle line assembly. Excessive force could change the electrode tip settings or damage the ceramic electrode insulators.

4.Use a 5/8” open-end wrench to carefully remove the existing nozzle.

Nozzle Flow Rate by Size

Nozzle flow rate U. S. gallons per hour of No. 2 fuel oil when pump pressure (psig) is:

Nozzle	125	140 psi	150	175	200
size	psi	(factory	psi	psi	psi
(rated		std.)
at 100
psig)
0.40	0.45	0.47	0.49	0.53	0.56
0.50	0.56	0.59	0.61	0.66	0.71
0.60	0.67	0.71	0.74	0.79	0.85
0.65	0.73	0.77	0.80	0.86	0.92
0.75	0.84	0.89	0.92	0.99	1.06
0.85	0.95	1.01	1.04	1.13	1.20
0.90	1.01	1.07	1.10	1.19	1.27
1.00	1.12	1.18	1.23	1.32	1.41
1.10	1.23	1.30	1.35	1.46	1.56
1.20	1.34	1.42	1.47	1.59	1.70
1.25	1.39	1.48	1.53	-	-
1.35	1.51	-	-	-	-

RWB 6104 BAFII R01 Page 11