™

UP TO 88% EFFICIENT, HOT WATER SUPPLY BOILER WITH MODULATING FIRE 4:1 TURNDOWN

SUGGESTED SPECIFICATION

The gas-fired hot water supply boiler(s) shall be A. O. Smith VF Boiler model VW______ having an input rating of _______

BTU/hr and capable of supplying no less than ______ GPH at a 100°F temperature rise when fired with (Natural/Propane)

gas. 1) The boiler shall bear the ASME “H” stamp and shall be National Board registered (CRN in Canada) for 160 PSI working pressure. 2) The boiler(s) shall be equipped with a factory-installed 125# PSIG ASME Pressure Relief Valve. 3) The boiler(s) shall be design-tested and certified to the ANSI Z21.13 standard and approved by CSA International. 4) Meet or exceed the SCAQMD Rule 1146.2 for low-NOx emissions and air quality standards.

The heat exchanger shall: 1) Incorporate a vertical straight tube 2 pass copper fin tube heat exchanger design. 2) Be circular, encompassing the entire burner and forming the combustion chamber. 3) The tubes shall be rolled into ASME grade steel glass lined tube sheets. 4) The headers shall be ASME 160 psi welded glass lined steel. 5) For ease of service and access, headers shall be bolted and sealed to the tube sheets with silicone “O” rings, having a temperature rating of over 400°F. Tube access plugs are not acceptable. 6) To provide rust-resistant operation, all internal heat exchanger water contact surfaces shall be copper or glass lined steel. 7) The heat exchanger shall be immune to thermal shock. 8) All non-heating surface heat exchanger components (headers, tube sheets, header bolts and gaskets) shall be outside and away from the combustion and flue collection areas, only the copper fin tubes shall be exposed to the products of combustion. 9) The sealed heat exchanger flue collection system shall be constructed of AL29-4C stainless steel that is immune to corrosive flue gases.

10)The heat exchanger shall be approved for inlet water temperatures down to 120°F. 10) The entire heat exchanger shall carry a five (5) year warranty.

Boiler Pump: 1) The hot water supply boiler(s) shall be supplied with a factory sized and wired all bronze circulating pump.

2) The pump shall be interfaced with and managed by the boiler’s control and cycled as needed for most efficient operation.

Burner: 1)The gas burner shall be constructed of high temperature stainless steel and utilize a woven metal fiber mesh covering, be warranted for 5 years, and fire in a radial 360-degree flame pattern. 2) The burner shall be capable of infinitely modulating between 25% and 100% fire (4:1 turndown) with smooth starts and clean combustion.

Boiler Controls: 1) All electrical boiler functions shall be controlled, operated, and monitored by a microprocessor-based control. 2) The microprocessor shall control and modulate the burner based on current system output requirements to maintain the boiler set point temperature and be accurate to within plus or minus 1°F. 3) The hot surface ignition system shall employ a separate flame sensor for maximum reliability. 4) The boiler control shall provide on board diagnostics with digital singular fault code read outs in plain English and help screens for additional troubleshooting assistance if needed. 5) The boiler shall be supplied with a remote tank thermistor for sensing and controlling the hot water storage tank temperature up to 1,000 feet away. 6) Provisions for connecting a remote thermistor, alarm bell, and alternate temperature controller must be provided. 7) Factory mounted and wired flow switch, blower prover, and blocked flue switches shall be provided. 8) The gas train shall meet or exceed the requirements of ANSI Z21.13 and include gas pressure regulator, manual gas cock, redundant safety gas valve, operating control valve, and plugged pressure test tapings. 9) The ASME rated pressure relief shall be factory installed.

Venting: 1) The boiler shall be certified for direct horizontal through-the-wall venting or direct vertical venting; in addition to sidewall or conventional vertical venting. 2) The boiler shall be capable of horizontal sidewall or direct venting up to 70 equivalent feet without the aid of any optional sidewalll vent fans or blowers.

Factory Start-up: 1) The boiler manufacturer must supply complete factory start-up by a factory approved start-up agent.

The boiler shall comply with ASHRAE/IESNA 90.1-1999 standards.

For Technical Information and Automated Fax Service, call 800-527-1953.

A. O. Smith reserves the right to make product changes or improvements without prior notice.

www.hotwater.com

500 Tennessee Waltz Pkwy, Ashland City, TN 37015

Page 4 of 4

ACGSS02307

 

©2007 A. O. Smith Corporation

Printed in U.S.A.

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A.O. Smith VW-500 through VW-1000, ACGSS02307 manual For Technical Information and Automated Fax Service, call
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ACGSS02307, VW-500 through VW-1000 specifications

A.O. Smith is a leading manufacturer in the water heating industry, known for its focus on innovation and quality. Among its diverse range of products, the A.O. Smith ACGSS02307 and the VW-500 through VW-1000 models stand out due to their advanced technologies and exceptional performance characteristics. Designed to cater to both residential and commercial applications, these models exemplify the company’s commitment to efficiency and reliability.

The ACGSS02307 model is designed with a robust and compact structure, making it ideal for limited spaces. It features a high-efficiency design that not only maximizes heat retention but also minimizes energy consumption. This model utilizes advanced insulation materials to reduce heat loss, allowing homeowners to enjoy consistent hot water while keeping energy costs in check. Additionally, the ACGSS02307 model is equipped with a state-of-the-art digital control system, which allows users to easily monitor and adjust settings for optimal performance.

On the other hand, the VW-500 through VW-1000 models are engineered for larger demands. These models offer varying capacities, catering to different scales of usage, from small businesses to larger commercial establishments. Key features include high recovery rates, which ensure that hot water is available whenever needed. These models integrate advanced heating technologies, such as modulating gas burners, which adjust to the exact demand, thereby enhancing energy efficiency.

One major characteristic of the VW series is its durable construction. Built with corrosion-resistant materials and robust design, they are engineered to withstand harsh conditions, ensuring a long service life. Additionally, these models are designed for easy installation and maintenance, reducing downtime and service costs for users.

Both the ACGSS02307 and VW series include safety features such as multiple temperature and pressure controls to prevent accidents. A.O. Smith also emphasizes sustainability, offering products that meet strict energy efficiency standards.

In conclusion, the A.O. Smith ACGSS02307 and the VW-500 through VW-1000 models showcase the company’s dedication to providing innovative and reliable water heating solutions. With advanced technologies, energy-efficient designs, and robust construction, they meet the diverse needs of consumers while promoting sustainability in water heating. Whether for personal or commercial use, these models are an investment in quality, efficiency, and performance.
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