from Fahrenheit to Centigrade: (° F – 32) times 5/9, or .556, equals degrees C.

RESIDENTIAL GAS, NON POWER VENTED, WATER HEATER

SERVICE HANDBOOK

Water Hammer – is a concussion of moving water against the sides of a containing pipe or vessel on a sudden stoppage of flow.

EX: 1/2 “copper pipe, 5GPM flow (7.2ft/sec.) – stop. Pressure rise of approximately 412 PSI. 3/4” copper pipe, 5GPM flow (3.3ft/sec) – stop. Pressure rise of approximately 188 PSI

Minerals and gases will separate from water as temperature increases.

Formulas:

Btu (British Thermal Unit) is the heat required to raise 1 pound of water 1°F 1 BTU = 252 cal = 0.252 kcal

1 cal = 4.187 Joules

BTU X 1.055 = Kilo Joules

BTU divided by 3,413 = Kilowatts

To convert

One gallon of (120° F, 49°C) water weighs approximately 8.25 pounds. Pounds X .45359 = Kilogram

Gallons X 3.7854 = Liters

%of Hot = (Mixed Temp. – Cold) divided by (Hot Temp. – Cold)

%Thermal Efficiency = (GPH X 8.25 X Temp. Rise X 1.0) divided by BTU/H Input

Btu Output = GPH X 8.25 X Temp. Rise X 1.0

GPH = (BTU/H Input X % Eff.) divided by (Temp. Rise X 8.25)

One cubic foot of Natural Gas contains about 1000 BTU of heat.

One “therm” is equal to 100,000 BTU

One cubic foot of Propane Gas contains about 2500 BTU of heat.

One gallon of Propane gas contains about 91,250 BTU of heat.

One pound of Propane gas contains about 21,600 BTU of heat.

One pound of gas pressure is equal to 27.7 inches water column pressure Inches of Water Column X .036091 = PSI

Inches of Water Column X .073483 = Inches of Mercury (Hg.)

State Water Heater

3

Technical Training Department

© 2004

 

Ashland city, TN

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State Industries STC-080 manual Formulas, To convert
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STC-080 specifications

The State Industries STC-080 is a high-efficiency water heater designed to meet the demands of residential and light commercial applications. With its strategic engineering and innovative technology, it offers a reliable solution for those seeking comfort, efficiency, and sustainability in water heating.

One of the main features of the STC-080 is its exceptional efficiency rating. It operates with an impressive Energy Factor (EF) that not only reduces energy consumption but also translates into lower utility bills for users. The unit utilizes a streamlined heat exchanger design, optimizing heat transfer and minimizing energy loss. This design ensures that users can enjoy hot water on demand without the worry of excessive energy expenditure.

The STC-080 is equipped with advanced heating technologies, including a dual-flame burner system. This system ensures rapid heating while providing consistent water temperature, which is essential for residential applications where demand can vary throughout the day. The integration of advanced controls also allows for precise temperature adjustments, giving users full control over their hot water supply.

Durability and reliability are key characteristics of the STC-080. Constructed from high-quality materials, it features a heavy-duty steel tank with a glass-lined interior that provides excellent corrosion resistance. This not only enhances the product's longevity but also ensures consistent performance even in challenging water conditions. Additionally, the unit includes an anode rod that further protects against corrosion, extending service life and reducing maintenance needs.

The STC-080 is designed for easy installation, with flexibility that accommodates various plumbing setups. Its compact design allows for placement in tighter spaces, making it an ideal choice for homes where space is at a premium.

Safety is another priority with the STC-080. It includes multiple safety features such as a temperature and pressure relief valve, ensuring safe operation. The unit also complies with stringent industry standards, providing peace of mind to homeowners and businesses alike.

In summary, the State Industries STC-080 is a standout water heating solution that combines efficiency, reliability, and advanced technology. With its robust construction and user-friendly features, it caters to the evolving needs of both residential and light commercial users, making it an excellent investment for those looking to enhance their water heating systems while being conscious of energy usage.
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