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Indirect Water Heater
Commercial Indirect Series
Model CI  (40-119 Gallon Capacity)
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High Performance and High Efficiency

The Vaughn Top Performer Plus Indirect Water Heater combines advanced engineering and Hydrastone cement lining to provide the industry's longest lasting and most reliable indirect water heater. The high efficiency design includes a factory installed and field removable all copper heat exchanger coil to provide maximum hot water output while significantly reducing mineral build up. The Vaughn industry leading technologies include an electronic thermostat with adjustable differential to ensure delivery of highly accurate and.

Top Performer Plus

Hydrastone ® Lining

A seamless one-half inch thick stone lining impervious to any adverse water conditions, proven to be the most effective method of preventing tank failure due to corrosion.

Removable Heat Exchanger

Conveniently located and simple 8 bolt flange design for ease of installation and service. This superior design allows for periodic cleaning of coil to maintain maximum performance. Double O-ring flange design isolates the coil and prevents electrolysis.

New Heat Trap and Hot Water Outlet Location

Specially design, built-in hot water outlet pipe preventing unnecessary heat loss

Ultimate Insulation

Two to three inches of polyurethane foam insulation combined with heat-retaining stone lining allows less than one-third degree per hour heat loss. There is simply none better.

How It Works

How It Works How It Works Diagram Further explained

Tank Specifications

Model Capacity First hour ratings/gal* Heat exchanger sq. ft Height Diameter Weight
S40HX15 40 118 15 58 3/4 20 228
US40HX20 40 132 20 33 26 232
S65HX20 65 154 20 33 26 309
S80HX20 80 167 20 58 26 337
S120HX20 120 201 20 69 1/4 28 424
  • All tappings 3/4 inch
  • Temperature and pressure relief valve required
  • Vacuum relief valve may be required
  • Commercial models available with dual HX coils and 1 1/2 inch hot/cold tappings
*First Hour Ratings Test (under typical residential conditions), tank volume at 85%, cold start - 90° tank rise (50°-140°), 180° boiler water, 3.5 GPM boiler flow, BTU input = 46,000 (HX15), 72,000 (HX20).

Standard 7 Year Limited Warranty

A repair or replacement is provided (excluding labor and freight) if the tank or heat exchanger should leak within seven years from the date of purchase.

Commercial 5 Year Limited Warranty

Vaughn CI Coil Curves

Coming Soon

Options for this product are coming soon.

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Model Numbers are coming soon.

Commercial Indirect Series Specific Questions

Is the Vaughn heat exchanger removable?

Yes. The heat exchanger is fully removable in all Vaughn indirect water heaters. The benefit to having a removable heat exchanger is that the coil can be removed for cleaning and de-scaling for improved performance and efficiency when used in hard water applications. It should be noted that the heat exchanger is not removable and the coil cannot be cleaned in many other indirect water heater brands.

Why is dielectric isolation so important?

The unique design of the Vaughn heat exchanger electrically isolates the heat exchanger from the tank by means of a non conductive barrier installed between the two. This provides dielectric isolation between the tank and the heat exchanger thereby eliminating electrolysis between the two due to dissimilar metals. This feature is one reason why the Vaughn indirect water heater far outlasts competitor models.

What is a sacrificial anode and does a cement lined tank need one?

All water heaters constructed using a steel tank requires a lining to protect the internal steel surfaces from corrosion. Certain linings (i.e. glass and epoxy), due to their nature, have unavoidable holes and imperfections resulting in exposure of the steel tank. As a result of this deficiency, the manufacturer will install an anode rod(s) in an attempt to delay corrosion of the steel tank. An anode rod is typically made of aluminum, magnesium or zinc, is a maintenance item that requires periodic inspection and replacement, and is often times the cause of a “rotten egg” odor to your hot water. Often referred to as a sacrificial anode rod because, over time, it slowly dissolves, sacrificing itself as it is attacked by aggressive substances in the water which would otherwise attack the steel tank through the pinholes and imperfections of the glass or epoxy lining. A cement lined steel tank on the other hand does not require an anode because of the thickness and guaranteed 100% coverage of the cement lining over all internal surfaces of the steel tank. This eliminates the need for an anode rod in a cement lined water heater, resulting in a significantly longer life compared to a glass or epoxy lined water heater. For a further discussion please click on the following link Cement Lining

General Questions

Are Vaughn heaters made in the USA?

Yes. Vaughn water heaters are all made in the USA and our factories located in Connecticut and Massachusetts and qualify for incentives under The Buy American Act and the American Recovery and Reinvestment Act (ARRA). For more information go to the following link Here.

Where can I purchase a Vaughn water heater?

There are numerous ways to purchase a Vaughn water heater depending upon the model you desire and your geographic location. The easiest way is either to visit our "Where to Buy" option in the red menu bar across the website, or contact Vaughn directly at 978-462-6683 and ask for the sales department where you will be directed to either our local representative or our order entry department for quick and easy ordering.

What code requirements are applicable for my installation?

The installation of water heaters are mostly governed by the Uniform Plumbing Code (or CPC in California), Uniform Mechanical Code, and National Electrical Code. These are standard codes that are used across the United States, and each state can amend them as they wish. To take it further, each city and county jurisdiction has assigned one or more building officials with what is called Administrative Authority. This Authority" allows each jurisdiction the right to interpret the codes as they see fit. Because of this many cities differ on their requirements. Vaughn strongly recommends that you contract with a plumbing engineer who knows and understands the intricacies of the building code requirements for your location.

Is it OK if my plumbing system has plastic pipes (PVC or PEX)?

Yes. All Vaughn water heaters will work with both types of plastic piping.

My question is not found in these FAQ’s, where do I look next?

Check out the Vaughn Product Center at Here for a complete listing of all technical Operation & Maintenance manuals documentation available by model. Get easy access to Installation Sales Brochures Service Bulletins Wiring Schematics Parts Breakdowns and various other technical documents related to the full line of Vaughn water heaters. Or if you prefer please call us at 978-462-6683 and ask to speak with Sales.

Downloads

Technical Documents


Many of our products literature is available online for download. To open these files, a PDF viewer is required. If you do not have one, Adobe provides Acrobat Reader free of charge for viewing only. Use this link to download Acrobat Reader. You may also choose to download the file to your PC for future reference or printing. On most operating systems, simply right-click on the links below, choose "Save target as..." or "Save link as...", choose a location and it will save the document to your computer for future reference.


Vaughn Water Heaters Logo
26 Old Elm Street
P.O. Box 5431
Salisbury, MA 01952-5431
Tel: 978-462-6683
Fax: 978-462-6497

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