State Industries STC-080 manual Safety drop out test, Procedures, If… … then, Condensation

Page 14

RESIDENTIAL GAS, NON POWER VENTED, WATER HEATER

SERVICE HANDBOOK

Residential Gas - continued

Electrical Testing– continued

Millivolt dropout test through copper magnet winding and ECO (Emergency Cut Off) Procedure: Move meter probe to upper ECO solder joint and ground

If …

… then

reading of at least 10 mV is not present

replace the control valve.

reading of more than 10 mV is present but,

replace the control valve.

gas to the pilot shuts off each time knob is

 

released

 

Safety drop out test –

The safety gas shutoff should interrupt gas through the valve when mV current drops to 1-3 mV.

Procedures:

Meter still connected to upper ECO solder joint and ground.

Turn Top Knob to “off” position

Millivolt output will decrease as thermocouple cools

 

TO GROUND

 

 

If…

… then

internal safety does not activate between 1

replace the control valve.

and 3 mV (you will hear a “click” inside the

 

valve)

 

*internal safety does activate between 1 and

valve is within tolerance and will interrupt gas

3 mV

flow if pilot looses heat or ECO opens.

*Note: A “click” sound should be heard from the valve as the main gas interrupter snaps up to the “closed” position.

Condensation

Flue gas products contain moisture. If these flue gas products are cooled to their “dew point”, they become visible moisture – condensation.

Flue gas may become cooled by:

•Cold supply air temperatures

•Cool surfaces – generally, if tank water temperatures drop below 110°F, the flue pipe surface and/or bottom tank head will be cool enough to cause condensation.

•Increased combustion efficiency – higher thermal efficiency means that an increased amount of heat is transferring from the flue gas into the water. If you transfer (approximately) 87.5%, or more, the moisture in the flue gas will condense.

State Water Heater

13

Technical Training Department

© 2004

 

Ashland city, TN

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Page 13 Page 15
Contents NON Power Vented Models Standard Residential GAS Water HeatersTable of Contents Residential GAS Service Handbook IntroductionTools Required Miscellaneous InformationFormulas To convertConstruction Installation of Residential GAS Water Heater Residental GAS Water Heater Service Normal Operation Residential GasResidential Gas Setting Approximate Temperature F Degree Burns on Adult SkinFuel Service000 BTUIf … … then TestSooting causes If … … then Electrical TestingThermocouple output test Procedures/Conditions If… … then Safety drop out testProcedures CondensationCondensation is a mild acid it will corrode steel Exhaust Venting Notes Flammable Vapor Ignition Resistant Fvir DesignPossible Service issues associated with a blocked screen LDO Screen LINT, DUST, OIL ScreensFlame Arrestor Combustion Chamber Temperature Sensor Possible service issues associated with the flame arrestorONE Piece Pilot Burner Assembly To replace a pilot assembly Sealed Combustion ChamberFive point inner door seal inspection Piezo Igniter Important Service ReminderOther features WHY Water Heater Tanks Leak What Prevention What WHY Prevention Water ConditionsFIX GeneralEffects Symptoms CauseAluminum Hydroxide If tank is new with no lime build-up to any degreeDiscolored Water TreatmentSmelly Water Chlorination Procedure ProcedureNot Enough HOT Water GAS TestThermal Expansion FIX Leaking Temperature and Pressure Relief Valve Symptoms General FIX

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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