Section: Nozzle Assembly Maintenance

E. Low Firing Rate Baffle.

The low firing rate baffle (See LFRB in Replacement Parts) reduces the air flow and pressure. The LFRB is sometimes used for firing rates under 1.00 gph as listed in Table 1. Refer to the equipment manufacturer’s instructions. Do not omit the LFRB when specified. Omitting the baffle when specified or installing the baffle when not specified could result in poor burner performance.

2.Place a 3/4” open-end wrench on the nozzle adapter. Insert the nozzle into the adapter and finger tighten. Finish tightening with a 5/8” open-end wrench.

3.If the nozzle is already installed, remove the nozzle line assembly to verify that the nozzle size and spray pattern are correct for the application (per equipment manufacturer’s information). Verify that the electrode tip settings comply with Figure 2.

Nozzle Assembly

Maintenance

Correct Nozzle and Flow

Rate Required

Use care when removing or installing an oil nozzle

A damaged nozzle could cause impaired combustion, sooting, puffback of hot gases, oil leakage and potential fire or asphyxiation hazards.

Incorrect nozzles and flow rates could result in impaired combustion, under- firing, over-firing, sooting, 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 manufacturer.

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 1.00 gph

yInspect the nozzle adapter to insure that the sealing surface is not grooved or scratched.

yTo insure that the nozzle functions properly, check the orifice and strainer for dirt, scratches or other damage before installation.

yDo NOT attempt to install or remove a nozzle without securing the adapter to prevent seriously damaging the alignment.

yUse care when handling the nozzle line assembly to prevent changing the electrode tip settings or damaging the ceramic electrode insulators.

yEnsure that the electrode settings match the values shown in Figure 2.

Figure 2. Electrode Tip Setting

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 Table 3.

A. Replace the Burner Nozzle.

1.If applicable, remove the plastic plug protecting the nozzle adapter threads.

5/32” GAP

1/4” ABOVE

CENTER

1/8” NOZZLE-TO-TIP SPACING

Figure 5. Nozzle, Line & Electrode Assembly

Electrode gap to be centered with nozzle center.

Contacts to be parallel with

6

 

 

 

horizontal center line within 2°.

8

1

90°

5

 

 

 

 

11

 

 

 

 

10

9

2

7

3

4

4

Item # Description

1Electrode Contact (3” ATC or extension over 3”)

2Nozzle Line

3Spider spacer assembly

4Static Plate

5Electrode clamp

6Electrode clamp retaining screws

Item # Description

7Nozzle line setscrew

8Electrode Insulator

9Nozzle adapter

10Nozzle tip

11Electrode tip

12 Vdc ADC Burner Manual

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Beckett ADC manual Nozzle Assembly Maintenance, Low Firing Rate Baffle, Replace the Burner Nozzle

ADC specifications

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