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

Inspect the chimney or vent. Make sure it is prop- erly sized and in good working condition. Follow the instructions supplied by the appliance manu- facturer.

Site Preparation

one near the bottom of the enclosure. Each open- ing must have a free area of not less than one (1) square inch per 1,000 BTU’s per hour of the total input rating of all appliances within the enclosure. The openings should have free access to the build- ing interior, which should have adequate infiltration from the outside.

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.

Combustion Air Supply Information

!Warning–Adequate Air

Supply Required

The burner cannot properly burn the fuel if it is not supplied with a reliable combustion air source. A non-reliable air source could result in incomplete combustion, causing sooting and possible carbon monoxide emission.

Possible Sooting &

Asphyxiation Hazard

S104

See NFPA Standard 31 for complete details.

Safety Shutoff for Direct Vent System

The direct vent blocked flue safety shut off system, refer to Figure 2, shuts down the burner if the ex- haust flue is blocked and/or if the air inlet is blocked. It recognizes a blocked flue by sensing excessive pressure in the combustion chamber. It recognizes a blocked inlet by sensing excessive vacuum in the air inlet adapter.

This system meets the requirements for a blocked flue or blocked combustion air inlet per CSA Stan- dard B140.0. It is designed to interrupt the cad cell circuit and allow the control to shut down the burn- er.

Appliances located in confined spaces: All confined spaces should have two (2) permanent openings; one near the top of the enclosure and

Direct/Sidewall Venting Application

For direct vent installations, follow instructions pro- vided with appliance and direct vent system. Out- side combustion air is required for direct venting.

Figure 2. Pressure Switch Installation

 

 

SK9803A

WM 550-141-996/1105

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RWB 6104WMNX R1005

 

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Weil-McLain NX Inspect/Prepare Installation Site, Site Preparation, Supply Required, Possible Sooting Asphyxiation Hazard

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.