Weil-McLain NX manual Fuel Line Installation, Fuel Line Valves and Filter, System Wiring

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Site Preparation

!Warning–Connect Outside Air Duct to NX Adapter.

The outside air adapter must be installed by strictly following the kit installation instructions. Do NOT attempt to install outside air piping without using the outside air adapter and instructions provided. Abundant fresh air is required for proper combustion.

Failure to install adapter properly could result in impaired combustion, appliance soot-up, puffback of smoke, and fire or asphyxiation hazards.

S121

When installing an NX outside air adapter (Beck- ett 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.

•Fuel Line Installation

Route the fuel line through the opening in the bottom of the burner cover. Continuous lengths of heavy wall copper tubing are recommended. Always use flare fittings. Never use compression fittings.

Always install fittings in accessible locations. To avoid vibration noise, fuel lines should not run against the appliance or ceiling joists.

!Caution–Do Not Use

Teflon Tape

Never use Teflon tape on any fuel fitting. Tape fragments can lodge in fuel line components and fuel unit, damaging the equipment and preventing proper operation.

Damage to the Pump could cause impaired burner operation, oil leakage and appliance soot-up.

S111

•Fuel Line Valves and Filter

Install two high quality oil duty rated shutoff valves in accessible locations on the oil supply line. Locate one close to the tank and the other close to the burner, upstream of the filter.

Also install a generous capacity filter, rated for 50 microns or less, inside the building between the fuel tank shutoff valve and the burner. Locate both the filter and the valve close to the burner for ease of servicing.

NOTICE

For protection in the event of fire, some states require the shutoff valves to be a fusible-handle design. R.W. Beckett Corporation recommends this design as good industry practice for all in- stallations.

•System Wiring

Refer to appliance manufacturer’s wiring diagram for electrical connections.

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

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Contents Beckett Model NX Burner Table of Contents Information To Be Used Only By Qualified Service TechniciansResponsibilty Hazard DefinitionsGeneral Information To the Owner NX Burner Specifications for Weil-McLain Ultra Oil Boilers Burner ConfigurationsGeneral Specifications General SpecificationsBurner Specifications Air Tube Combination ATC codesBurner label location Inspect/Prepare Installation Site Site PreparationSupply Required Possible Sooting Asphyxiation HazardFuel Line Valves and Filter Fuel Line InstallationSystem Wiring Burner Preparation Pipe System Prepare the BurnerPressure Control Required Burner Preparation Burner ConnectionsTypical Burner Wiring & Burner Sequence of Operation Start the Burner and Set Combustion Start-up and Initial SettingsStart the Burner Cover Installation Set Combustion with Test InstrumentsService Required Professional MaintenanceTrained Service Technician’s Regular Maintenance Nozzle Installation Electrode tip gap and spacingCheck/Adjust Electrodes Check/Adjust Zero CalibrationBlower wheel assembly Blower Wheel ReplacementReplacement 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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