Beckett NX manual Ing Windows

Trained Service Technician’s Regular Maintenance

ˆMake sure Low Firing Rate Baffle is in place if required for the burner application. Omitting the baffle can result in unacceptable burner combus- tion.

ˆInspect all gaskets. Replace any that are dam- aged or would fail to seal adequately.

ˆClean the blower wheel, air inlet, air guide, reten- tion head, throttle cup and throttle ring of any lint or foreign material.

!WARNING Do Not Puncture, Scratch, or Remove Flame Sight-

ing Windows

If a window is punctured, signifi- cantly scratched or removed from the throttle cup, the burner perfor-

mance could be impaired, resulting in safety lockout, appliance soot-up, equipment damage, hot gas puff-back and asphyxiation hazard.

•Use a clean soft cloth and degreaser, on an an- nual basis, to remove any build-up or dark stains from the windows.

•If damaged, replace the nozzle line assembly with an assembly that has a windowed throttle cup.

ˆUse a clean soft cloth with a degreaser to clean any accumulated soot or oil stains from the throttle cup sight windows.

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

ˆCheck all wiring for secure connections or insula- tion breaks.

ˆCheck the pump pressure and cutoff function.

ˆCheck primary control safety lockout timing.

ˆCheck ignition system for proper operation.

ˆInspect and clear the vent system and chimney of any soot accumulation or other restriction.

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

ˆCheck the burner performance. Refer to the sec- tion “Set combustion with test instruments”.

ˆIt is good practice to keep a record of the service performed and the combustion test results.

•Removing Nozzle Line for Service (Refer- ence the Replacement Parts Diagram.)

!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.Before proceeding, turn off the main power switch to the burner.

2.Remove the burner cover by loosening the four thumb screws (two on each side of burner).

3.Disconnect the copper connector tube assembly from the nozzle line bulkhead fitting.

4.Loosen the two screws securing the igniter re- taining clips and rotate both clips to release the igniter baseplate. The igniter should pop up and be supported by the prop spring.

5.Loosen the two screws securing the rear door. Swing the door to the right and down.

6.Loosen the splined nut.

7.Remove the nozzle line electrode and head as- sembly from the burner by drawing it straight back and out the rear door opening. The adjust- ment mechanism is still attached. Be careful not to damage the electrodes or insulators while han- dling.

8.To replace the nozzle assembly, reverse the above procedure.

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