RESIDENTIAL GAS, NON POWER VENTED, WATER HEATER

SERVICE HANDBOOK

TECHNICAL BULLETIN - 35

NOT ENOUGH HOT WATER - GAS

CAUSE

Not enough hot water complaints are becoming more frequent in the water heater industry. This increase was triggered when changes required by our regulatory agencies were implemented. For example, heaters are now factory preset at a lower temperature and inlet tubes have been shortened. While lower temperatures settings reduce the burn rate, and shorter dip tubes guard against stacking, both affect the amount of hot water a water heater can supply. The following test will help determine if a water heater is supplying the intended amount of hot water and will help pinpoint any problems that exist.

TEST

Please read all the steps of the test prior to beginning. If you feel uncomfortable

 

performing any of these steps, contact a service person to conduct this test for you.

 

 

STEP 1

At the faucet nearest to the water heater, time (in seconds) how long it takes to fill a

 

1 gallon bucket (flow rate).

 

 

Gallon per minute (gpm) = 60 seconds / seconds to fill a 1 gallon bucket

 

If the bucket fills in: 10 sec = 6 gpm

 

 

12 sec = 5 gpm

 

 

15 sec = 4 gpm

 

 

20 sec = 3 gpm

 

 

24 sec = 2.5 gpm

 

STEP 2

Turn thermostat dial on the water heater so the arrow points to “A” position.

STEP 3

Run about 15 gallons of hot water from the nearest faucet. Shut water off.

STEP 4

Water heater should complete heating 15 gallons in approximately 20-35 minutes.

STEP 5

At a nearby faucet using a candy thermometer, measure the hot water temperature.

STEP 6

The temperature should fall between 120°F to 140°F.

STEP 7

Continue running the hot water until 60% of the tank capacity is depleted:

 

CAPACITY

DEPLETE

 

30 gallons

18 gallons

 

40 gallons

24 gallons

 

50 gallons

30 gallons

 

75 gallons

45 gallons

 

100 gallons

60 gallons

STEP 8

At the same faucet using a candy thermometer, measure the water temperature.

STEP 9

The temperature should be about 30°F below the temperature in step 6.

THE FIX

Step 6 - if the temperature was not within range, check the thermostat. Step 9 - if more than 30 °F was lost, check the dip tube.

State Water Heater

31

Technical Training Department

© 2004

 

Ashland city, TN

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State Industries STC-080 manual Not Enough HOT Water GAS, Test
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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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