Specifications

ManualsBrandsWeil-McLain ManualsBurnerCG10

RWB 6104 WMNX Page 1

Potential for Fire, Smoke and Asphyxiation Hazards

To the Homeowner or Equipment Owner:

Please read and carefully follow all instructions

provided in this manual regarding your responsi-

bilities in caring for your heating equipment.

Contact a professional, qualiﬁ ed service agency

for installation, start-up or service work.

READ THESE INSTRUCTIONS AND SAVE FOR FU-

TURE REFERENCE.

•

Incorrect installation, adjustment, or misuse of this burner could result in death, severe

personal injury, or substantial property damage.

To the Professional, Qualiﬁ ed Installer or

Service Agency:

Please read and carefully follow all instructions

provided in this manual before installing, starting,

or servicing this burner or heating system.

The Installation must be made in accordance with

all state and local codes having jurisdiction.

•

WARNING

Beckett Model NX Burner

Oil Fired Water Boiler

WM 550-141-996/806

Summary of content (20 pages)

PAGE 1
Oil Fired Water Boiler Beckett Model NX Burner ! WARNING Potential for Fire, Smoke and Asphyxiation Hazards Incorrect installation, adjustment, or misuse of this burner could result in death, severe personal injury, or substantial property damage. To the Homeowner or Equipment Owner: • • • Please read and carefully follow all instructions provided in this manual regarding your responsibilities in caring for your heating equipment.
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Page 2 RWB 6104 WMNX
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Table of Contents General Information Hazard Definitions ........................................................................................................................................ 4 Owner’s Responsibility ................................................................................................................................ 4 Information To Be Used Only By Qualified Service Technicians Weil-McLain Burner Specifications ..................................................................
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General Information General Information To the Owner: Thank you for purchasing a Beckett NX burner for use with your heating appliance. Please pay attention to the Safety Warnings contained within this instruction manual. READ THESE INSTRUCTIONS AND SAVE FOR FUTURE REFERENCE. Your NX burner will provide years of efficient operation if it is professionally installed and maintained by a qualified service technician.
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Weil-McLain Burner Specifications NX Burner Specifications for WeilMcLain Ultra Oil Boilers NOTICE Fozen Plumbing and Water Damage Hazard. Unoccupied residences in severly cold weather could experience frozen plumbing in just a few hours if the heating system fails for any reason. Consult your HVAC contractor for effective preventive protection, such as electronic monitoring systems with 24/7 dial-up capability.
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General Information Certifications/approvals General Information Underwriters Laboratories has certified this burner to comply with ANSI/UL 296 and CSA-B139. Low sulfur #1 and #2 fuel oils reduce heat exchanger deposits with all burners compared to the standard fuels. Reduced deposits extend the service interval for cleaning and improve the efficiency of the appliance over time. Low sulfur fuels reduce particulate and oxides of nitrogen emissions as well.
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Figure 2 – Chimney Design - Above the Roof Inspect/Prepare Installation Site NOTE: Correct chimney design is shown by dotted lines. Incorrect chimney design, as shown by the solid lines, may result in downdrafts. 2. A chimney flue shall extend at least 3 feet above the highest point at which the chimney comes in contact with the roof, and not less than 2 feet above the highest roof surface or structure within 10 feet horizontally of the chimney. Refer to Figure 2.
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Inspect/Prepare Installation Site Exhaust fans and other air-using devices: Size air openings large enough to supply all air-using devices in addition to the minimum size required for combustion air. If there is any possibility of the equipment room developing a negative pressure due to exhaust fans, clothes dryers, etc., either pipe combustion air directly to the burner or provide a sealed enclosure for the burner and supply it with its own combustion air supply.
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2. Verify that the air tube installed on the burner provides the correct insertion depth. See Figure 4. 3. The end of the air tube should normally be ¼” back from the inside wall of the combustion chamber. Never allow the leading edge of the head assembly to extend into the chamber, unless otherwise specified by the heating appliance manufacturer. Carefully measure the insertion depth when using an adjustable flange. Verify the insertion depth when using a welded flange.
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Wiring Connections Diagram • Figure 6. – Outside Buried Tank-Lift System ! WARNING Electrical Shock Hazard Electrical shock can cause severe personal injury or death. • • • NOTICE To further protect the fuel supply system and reduce nozzle orifice plugging with firing rates below 0.75 gph, a dual filtration system can be installed. This typically consists of a 50 micron primary filter, located near the fuel tank and a secondary filter rated for at least 10 microns located near the burner.
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Start the Burner and Set Combustion Figure 8. – Typical Burner Wiring for R7184 Control. Refer to the appliance manufacturer’s wiring diagram for actual specifications. Burner Sequence of Operation for R7184 Control. 1. STANDBY. The burner is idle, waiting for a call for heat. When a call for heat is initiated, there is a 310 second delay while the control performs a safe start check. 2. VALVE-ON DELAY. The ignition and motor are turned on for a 15 second valve-on delay. 3. TRIAL FOR IGNITION (TFI).
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Start the Burner and Set Combustion • WARNING Explosion and Fire Hazard ! Failure to follow these instructions could lead to equipment malfunction and result in heavy smoke emission, soot-up, hot gas puffback, fire and asphyxiation hazards. Start-up and Initial Settings 1. Open the shutoff valves in the oil supply line to the burner. 2. Referencing Figure 9, verify and/or set the Head/Air Adjustment Pointer to the value specified by the Appliance Manufacturer. Refer to Table 1.
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Set Combustion using Test Instruments NOTICE The NX burner has a reduced diameter air tube, precision-designed air throttle cup and combustion head for improved performance. This design provides very accurate control of the air/fuel ratio, but the light reaching the cad cell through small holes in these components is limited. Because of this, the average cad cell resistance may be higher than conventional burners with larger openings. 2.
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Trained Service Technician’s Regular Maintenance Cover Installation • 1. Install the four cover mounting thumb screws in the cover mounting plate. 2. Install the cover over the mounting plate while aligning the side slots with the installed cover mounting screws. Figure 11.
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Trained Service Technician’s Regular Maintenance Removing Nozzle Line for Service (Reference the Replacement Parts Diagram.) • ! 5. Loosen the two screws securing the rear door. Swing the door to the right and down. 6. Loosen the splined nut. WARNING Electrical Shock Hazard 7. Remove the nozzle line electrode and head assembly from the burner by drawing it straight back and out the rear door opening. The adjustment mechanism is still attached.
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Trained Service Technician’s Regular Maintenance Nozzle Flow Rate by Size Figure 12. – Electrode tip gap and spacing Nozzle flow rate U. S. gallons per hour of No. 2 fuel oil when 5/32” GAP pump pressure (psig) is: Nozzle 125 140 psi 150 175 200 size psi (factory psi psi psi (rated 1/4” above nozzle center 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.
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Figure 13. – Retention Head/Throttle Cup Alignment 7. The rear door must be kept tightly closed. The adjustment screw may now be turned to adjust the head/air setting. 8. Turn the adjusting screw to a setting ½ number lower than the proper set point as indicated in Table 1. Then turn the adjusting screw counterclockwise to the proper setting. Figure 14. – Blower wheel assembly 9. Tighten the splined nut and lower acorn nut after the head/air setting has been adjusted.
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Replacement Parts Diagram Page 18 RWB 6104 WMNX
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Replacement Parts List For best performance specify genuine Beckett Item Description Part No.
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Limited Warranty Information Limited WARRANTY For Residential, Commercial and Specialty Burners The R. W.