OWNER’S MANUAL

AIR FOR COMBUSTION AND VENTILATION

WARNING: This heater shall not be installed in a confined space or unusually tight construction unless provisions are provided for adequate combustion and ven- tilation air. Read the following in- structions to insure proper fresh air for this and other fuel-burning appliances in your home.

Today’s homes are built more energy effi- cient than ever. New materials, increased insulation, and new construction methods help reduce heat loss in homes. Home owners weather strip and caulk around windows and doors to keep the cold air out and the warm air in. During heating months, home owners want their homes as airtight as possible.

While it is good to make your home energy efficient, your home needs to breathe. Fresh air must enter your home. All fuel-burning appliances need fresh air for proper com- bustion and ventilation.

Exhaust fans, fireplaces, clothes dryers, and fuel burning appliances draw air from the house to operate. You must provide ad- equate fresh air for these appliances. This will insure proper venting of vented fuel- burning appliances.

PROVIDING ADEQUATE VENTILATION

The following are excerpts from National Fuel Gas Code. NFPA 54/ANS Z223.1, Sec- tion 5.3, Air for Combustion and Ventilation.

All spaces in homes fall into one of the three following ventilation classifications:

1.Unusually Tight Construction

2.Unconfined Space

3.Confined Space

The information on pages 5 through 7 will help you classify your space and provide adequate ventilation.

Unusually Tight Construction

The air that leaks around doors and win- dows may provide enough fresh air for combustion and ventilation. However, in buildings of unusually tight construction, you must provide additional fresh air.

Unusually tight construction is de- fined as construction where:

a.walls and ceilings exposed to the outside atmosphere have a con- tinuous water vapor retarder with a rating of one perm (6 x 10-11kg per pa-sec-m2) or less with open- ings gasketed or sealed and

b.weather stripping has been added on openable windows and doors and

c.caulking or sealants are applied to areas such as joints around window and door frames, be- tween sole plates and floors, be- tween wall-ceiling joints, be- tween wall panels, at penetra- tions for plumbing, electrical, and gas lines, and at other openings.

If your home meets all of the three criteria above, you must provide ad- ditional fresh air. See Ventilation Air From Outdoors, page 7.

If your home does not meet all of the three criteria above, proceed to Deter- mining Fresh-Air Flow For Fireplace Location, page 6.

Confined and Unconfined Space

The National Fuel Gas Code (ANS Z223.1, 1992 Section 5.3) defines a confined space as a space whose volume is less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space and an unconfining space as a space whose volume is not less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space. Rooms communicating directly with the space in which the appliances are in- stalled*, through openings not furnished with doors, are considered a part of the uncon- fined space.

This heater shall not be installed in a con- fined space or unusually tight construction unless provisions are provided for adequate combustion and ventilation air.

*Adjoining rooms are communicating only if there are doorless passageways or ventila- tion grills between them.

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Desa VMH26PR AIR for Combustion and Ventilation, Providing Adequate Ventilation, Unusually Tight Construction
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VMH26PR specifications

Desa VMH26PR is a cutting-edge horizontal multistage pump designed for a variety of applications, primarily in industrial and municipal sectors. Its robust construction delivers excellent performance and reliability, making it a preferred choice for demanding environments.

One of the primary features of the VMH26PR is its versatile design. Engineered for efficiency, it is capable of handling a wide range of fluids, including clean water, chemicals, and other industrial liquids. This pump is particularly known for its ability to operate under high-pressure conditions while maintaining a low energy consumption rate, which is a significant advantage in terms of operational costs.

The VMH26PR incorporates advanced hydraulic technologies, which enhance both performance and efficiency. The multistage configuration allows for higher pressure generation, making it ideal for applications that require elevated discharge pressures. Each stage is meticulously designed to optimize flow, reducing turbulence and maximizing throughput. This results in improved overall system efficiency and longevity of the pump.

In terms of materials, the VMH26PR offers various casing options tailored to the specific needs of the application, including stainless steel and cast iron. These materials provide excellent resistance to corrosion and wear, ensuring durability even in harsh environments. Additionally, the pump features mechanical seals designed to minimize leakage and enhance reliability.

Another significant technological aspect of the VMH26PR is its modular design. This allows for easy maintenance and component replacement, reducing downtime and service costs. Users can easily access vital parts without disassembling the entire unit, which is a considerable advantage for operation in critical settings.

Moreover, the Desa VMH26PR is equipped with a range of monitoring and control options, enabling seamless integration into automated processes. This feature enhances operational efficiency, allowing operators to monitor performance parameters in real-time and make data-driven decisions to optimize performance.

Overall, the Desa VMH26PR stands out with its combination of efficiency, durability, and ease of maintenance, making it an ideal solution for various fluid handling tasks across different industries. Its ability to adapt to specific requirements and conditions ensures it will meet the diverse needs of modern applications effectively.
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