Weil-McLain NX manual Set Combustion with Test Instruments, Cover Installation

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!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.

Could cause death, personal

injury and/or substantial property damage due to equipment malfunction, heavy smoke, soot blockage, hot gas puff-back, fire and asphyxiation hazard.

S112

•Set Combustion with Test Instruments

1.Allow the burner to run for approximately 5 to 10 minutes.

2.Set the stack draft between -0.01” to -0.02” w.c. for chimney vent applications. No

draft adjustment required for direct venting.

3.Follow these five steps to properly adjust the burner:

Step 1: Adjust the head/air until a trace of smoke is achieved. This can be accomplished by turn- ing the screw on the head/air adjustment plate assembly to increase air (CCW) or decrease air (CW).

Step 2: At the trace of smoke level, measure the CO2 (or O2) . This is the vital reference point for further adjustments. Example: 13.5% CO2 (2.6% O2)

Step 3: Increase the air to reduce the CO2 by 1.5 to 2 percentage points. (O2 will be increased by approximately 2.0 to 2.7 percentage points.) Ex- ample: Reduce CO2 from 13.5% to 11.5% (2.6% to 5.3% O2).

Step 4: Recheck smoke level. It should be Zero.

•This procedure provides a margin of reserve air to accommodate variable conditions.

•If the draft level has changed, recheck the smoke and CO2 levels and readjust burner, if necessary.

Step 5: Once the combustion has been set, tight- en the lower acorn nut and splined nut on the air adjustment assembly. See Figure 5.

Start the Burner

4.Chimney Vent Systems: Install the burner cover and repeat Steps 2 and 4 above. If CO2 increas- es (O2 decreases), remove the cover and adjust the air setting so the CO2 (O2) with the cover installed meets the requirements of Step 3.

5.Direct Vent Systems with Outside Air Ducted to Burner: Install the burner cover.

6.Start and stop the burner several times to ensure satisfactory operation. Test the primary control and all other appliance safety controls to verify that they function according to the manufactur- er’s specifications.

•Cover Installation

1.Install the cover mounting 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.

3.Direct Vent specified burners include an opening on the top of the cover for an outside air intake.

Figure 6. – Burner Cover

SK9804A

WM 550-141-996/1105 RWB 6104WMNX R1005

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Contents Beckett Model NX Burner Information To Be Used Only By Qualified Service Technicians Table of ContentsGeneral Information To the Owner Hazard DefinitionsResponsibilty Burner Configurations NX Burner Specifications for Weil-McLain Ultra Oil BoilersGeneral Specifications General SpecificationsBurner Specifications Air Tube Combination ATC codesBurner label location Site Preparation Inspect/Prepare Installation SiteSupply Required Possible Sooting Asphyxiation HazardSystem Wiring Fuel Line InstallationFuel Line Valves and Filter Pressure Control Required Prepare the BurnerBurner Preparation Pipe System Burner Connections Burner PreparationTypical Burner Wiring & Burner Sequence of Operation Start the Burner Start-up and Initial SettingsStart the Burner and Set Combustion Set Combustion with Test Instruments Cover InstallationTrained Service Technician’s Regular Maintenance Professional MaintenanceService Required Electrode tip gap and spacing Nozzle InstallationCheck/Adjust Zero Calibration Check/Adjust ElectrodesBlower Wheel Replacement Blower wheel assemblyReplacement Parts Diagram Professional Maintenance Warranty

NX specifications

The Weil-McLain NX is a state-of-the-art boiler line that showcases the brand's commitment to energy efficiency, reliability, and innovative technology. Designed for both residential and commercial applications, the NX series is ideal for those seeking powerful heating solutions with minimal environmental impact.

One of the standout features of the Weil-McLain NX is its impressive efficiency rating. The boiler is designed to maximize energy use, ensuring that a greater percentage of fuel is converted into usable heat. This efficiency not only translates to lower utility bills for consumers but also reduces overall carbon emissions, making the NX an eco-friendly choice for heating.

The NX series boasts a robust cast-iron heat exchanger, which is known for its durability and longevity. Cast iron is not only resistant to thermal shock but also provides superior heat retention, enhancing the system's efficiency even further. This heat exchanger design allows for a longer lifecycle and reduced maintenance needs, making it a reliable option for homeowners and businesses alike.

In terms of technology, the Weil-McLain NX comes equipped with advanced control systems that provide precise temperature management and safety features. The intuitive control interface allows for easy adjustments, ensuring that users can tailor their heating experience to their specific needs. Features such as outdoor reset control and multiple stage modulation contribute to optimized performance and energy savings.

The NX is also designed with flexibility in mind. Its compact size allows for installation in a variety of spaces, making it suitable for retrofitting older systems. Additionally, the boiler is compatible with a range of heating applications, from radiant floor heating to baseboard systems, providing versatility in heating configurations.

As for safety, Weil-McLain has incorporated several safety features in the NX series. High-limit controls, flame rollout switches, and low water cutoff devices are standard, ensuring that the system operates safely and efficiently.

In summary, the Weil-McLain NX is a premium choice for anyone in the market for a reliable and efficient heating solution. With its high efficiency, durable construction, advanced technology, and versatile applications, the NX series stands out as a top contender in the boiler market, catering to the demands of modern heating needs while prioritizing sustainability and safety.
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