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Weil-McLain NX User Manual

For oil fired water boiler
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Beckett
!
Warning–Notice to Owner
Please read and follow all instructions on Page 3 in this
manual regarding your responsibilities in caring for your
heating equipment
Contact a qualified service
agency for installation and
start-up. Incorrect Installation,
adjustment, or misuse of this
burner could result in severe
personal injury, death or
substantial property damage.
WM 550-141-996/1105
RWB 6104WMNX R1005
NX
Model
!
S119
Oil Fired Water Boiler
Burner
Warning–To Professional
Installer or Service Provider
Please read and follow all instructions contained in this
manual before installing, starting or servicing this
heating system.
Incorrect Installation,
adjustment, or misuse of
this burner could result in
severe personal injury,
death or substantial
property damage.
S120
Page 1

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Summary of Contents for Weil-McLain NX

  • Page 1 Beckett Warning–Notice to Owner Please read and follow all instructions on Page 3 in this manual regarding your responsibilities in caring for your heating equipment Contact a qualified service agency for installation and start-up. Incorrect Installation, adjustment, or misuse of this burner could result in severe personal injury, death or substantial property damage.

  • Page 2: Table Of Contents

    Hazard Defi nitions and Owner’s Information Information To Be Used Only By Qualifi ed Service Technicians Weil McLain Burner Specifi cation General Information ... 5 Certifi cations/Approvals…………………………………………………………..5 Notice Special Requirements ... 6 Inspect/Prepare Installation Site Clearances to Burner and Appliance ... 7 Inspect Chimney or Direct Vent System ...

  • Page 3: To The Owner

    NX burner. Your NX burner will provide years of effi cient operation if it is professionally installed and maintained by a quali- S118 fi...

  • Page 4: Weil Mclain Burner Specifi Cation

    Table 1. Burner Confi gurations The table below provides burner specifi cations and starting air settings for NX burners applied to Weil-McLain Model UO boilers. Follow all instructions in this burner manual, the boiler manual and the fuel pump literature to install, setup and service the burner.

  • Page 5: General Information

    General Specifi cations Table 2 – Burner Specifi cations Capacity LB & LC Firing rate 0.40 – 1.35 GPH Input 56,000 – 189,000 Btu LD & LF Firing rate 1.10 - 1.75 GPH Input 154,000 – 245,000 Btu/h Fuels U. S No. 1 or No. 2 heating oil only ...(ASTM D396) Canada No.

  • Page 6: Notice Special Requirements

    General Specifi cations State and local approvals are shown on burner rat- ing label mounted on the burner housing. For recommended installation practice in Canada, refer to the latest version of CSA Standard B139 & B140. Figure 1. Burner label location Page 6 Notice Special Requirements •...

  • Page 7: Inspect/Prepare Installation Site

    Inspect/Prepare Installation Site Clearances to Burner and Appliance • Provide space around burner and appliance for ease of service and maintenance. Check the minimum clearances against those shown by the appliance manufacturer and by ap- plicable building codes. Inspect Chimney or Direct Vent System •...

  • Page 8: Fuel Line Installation

    Part Number 5199OU), refer to the instruction sheet supplied with the adapter. This kit allows combustion air to be piped directly to the burner. The NX outside air adapter kit may also be used for chimney vent applications that require outside combustion air.

  • Page 9: Prepare The Burner

    S109 The NX burner has a reduced diameter air tube, precision-designed air throttle cup and combus- tion head for improved performance. This de- sign provides very accurate control of the air/fuel ratio, but the light reaching the cad cell through small holes in these components is limited.

  • Page 10: Burner Preparation

    Burner Preparation Figure 3. – Burner Connections. SK9806 Page 10 WM 550-141-996/1105 RWB 6104WMNX R1005...
  • Page 11 Figure 4. – Typical Burner Wiring & Burner Sequence of Operation BOILER INSTRUCTION BURNER DISCONNECTS MANUAL CORRECT WIRING 120 VAC FIELD WIRING 120 VAC FIELD WIRING LOW VOLTAGE FIELD WIRING LOW VOLTAGE FIELD WIRING 120 VAC FACTORY WIRING 120 VAC FACTORY WIRING LOW VOLTAGE FACTORY WIRING LOW VOLTAGE FACTORY WIRING 1.

  • Page 12: Start The Burner And Set Combustion

    Start the Burner Start the Burner and Set Combustion Start-up and Initial Settings • Open the shutoff valves in the oil supply line to the burner. Referencing Figure 5 verify and/or set the Head/ Air Adjustment Pointer to the value shown in Table 1.

  • Page 13: Set Combustion With Test Instruments

    Warning–Check for Excess Fuel Accumulation. 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.

  • Page 14: Trained Service Technician's Regular Maintenance

    Professional Maintenance Trained Service Technician’s Regular Maintenance While performing routine maintenance check the following. Replace the oil supply line fi lter. The line fi lter car- tridge must be replaced to avoid contamination of the fuel pump and nozzle. • Inspect the oil supply system.

  • Page 15: Nozzle Installation

    • Nozzle Installation Obtain a nozzle having the capacity, spray angle, and pattern specifi ed in the appliance manufac- turer’s information or Beckett OEM Specifi cation Guide, Part # 6711. Make certain the correct nozzle is selected for the actual fuel pump pressure. See Table 1. Perform the following steps when replacing a noz- zle.

  • Page 16: Check/Adjust Electrodes

    NOTICE The NX burner has a reduced diameter air tube, precision-designed air throttle cup and combus- tion head for improved performance. This de- sign provides very accurate control of the air/fuel ratio, but the light reaching the cad cell through small holes in these components is limited.

  • Page 17: Blower Wheel Replacement

    • Blower Wheel Replacement For installation or replacement of a blower wheel, insure that there is a space between the blower wheel and the motor face of 0.115”. Refer to Figure Figure 10. – Blower wheel assembly WM 550-141-996/1105 RWB 6104WMNX R1005 Professional Maintenance SK9670 Page 17...

  • Page 18: Replacement Parts Diagram

    Professional Maintenance Replacement Parts Diagram SK967102 SK9804B SK9803B Beckett For best performance specify genuine replacement parts Page 18 WM 550-141-996/1105 RWB 6104WMNX R1005...

  • Page 19: Replacement Parts List

    Part Number designations for Replacement Parts Dia- grams on Page 18. Item Description Head/Air adjustment mecha- nism assembly Air guide Gasket, mounting fl ange (not shown) Air tube combination, (Includes Screws, air tube mounting #8 x 3/8) Blower wheel Connector tube assembly, 11” Coupling Door, rear access Electrode insulator kit...

  • Page 20: Beckett Limited Warranty Information

    60 months from the date of manufacture for Residential Burners and 18 months from the date of manufacture for Commercial and Specialty Burners. Residential burner models include: AF, AFG, AFII, NX, SF, SR and SMG. Commercial burner models include: CF375, CF500, CF800, CF1400, CF2300A, CF2500, CF3500A, CG10, CG15, CG25 and CG50.

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Beckett nx

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