State Industries STC-077 dimensions ECO Check, VAC to ECO

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S U F S E R V I C E H A N D B O O K

T R O U B L E S H O O T I N G

ECO CHECK

STEP 4

24 VAC TO ECO

STEP 4: CHECK FOR 24 VAC BETWEEN PIN 4 ON CONTROL BOARD TERMINAL CN3 AND GROUND.

Condition:

•Disconnect CN3 plug from control board.

•On/Off switch is on.

Check for 24 VAC between pin 4 of the CN3 terminal on the control board and ground.

IF…

THEN

 

 

 

 

 

 

24

VAC is not present

replace the control board if Steps 1, 2, and 3 have been performed and the results

were successful.

 

 

 

 

 

24

VAC is present

continue to Step 5.

 

 

 

State Water Heaters

21

Technical Training Department

Ashland City, Tennessee © 2004

STC-077

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Contents Commercial SUF Service Handbook Table of ContentsIntroduction Tools RequiredClearances InstallationGAS Supply Specifications GAS RequirementsDirect Venting VentingEquivalent Feet of Pipe Intake or Exhaust Vent Length Table Number Minimum Maximum Elbows Pipe FeetVenting Configurations Venting MaterialsHorizontal Installation Vertical Installation Concentric Vent TerminationVenting Clearances SUF ModelExterior Sidewall Clearances AIR Requirements Direct Vent InstallationMAKE-UP AIR Direct Communication Vertical DuctsInsufficient MAKE-UP AIR Horizontal DuctsBackdraft Contaminated AIR Flammable ItemsMultiple Unit Water Piping Condensation Operation Sequence of OperationControls Normal Indications / Readings / SettingsDuring Call for Heat Circut Boards Display Circuit Board Ignition Circuit BoardVAC to Control TroubleshootingPRE-SERVICE Tips VAC to Control BoardTransformer VAC to TransformerVAC from Transformer ECO Check VAC to ECOVAC from ECO Check for 24 VAC Between PIN 1 on CN3 Plug and GroundUpper Lower Temperature Temperature ProbeTemperature Probe Resistance Probe PlugPressure Switch Continuity Pressure Switch Continuity TestBlower VAC to BlowerTake AIR and GAS Pressure Readings Pressure Switch PerformanceAmbient Room AIR Pressure Pressure Switch Continuity Test Operational OnlyVAC to Ignitor VAC to IgnitorIgnitor Resistance Ignitor Resistance CheckSUF 240 only GAS Valve TestVAC to GAS Valve Supply GAS Pressure Test GAS Pressure CheckManifold GAS Pressure Test Component Information Orifice TablePressure Swtches Pressure Switches Pressure Switches Part Number / Activation PRESSURE†Wiring Diagrams Service Aids SUF Muffler T E SWhen should SUF’s be delimed? Questions and AnswersHow often should the anodes be inspected? Code #S Error CodesCode Indication AboveService Checklist III. GAS Pressure Fill in Blank ALL Units onSUF Models 100 150, 100 199 and 100 State Water HeatersUltra Force SUF Models Replacement Parts Description SUFUltra Force SUF Controls Parts List T E S Expert’s Choice

STC-077 specifications

The State Industries STC-077 is a notable addition to the realm of high-efficiency water heaters, exemplifying advanced engineering and innovative design. The STC-077 is particularly recognized for its exceptional performance and energy-saving capabilities, making it an ideal solution for both residential and commercial applications.

One of the standout features of the STC-077 is its impressive energy efficiency rating. Utilizing state-of-the-art technology, this water heater operates with a high energy factor (EF) that significantly reduces operating costs compared to traditional water heating systems. This is especially beneficial in today's climate of rising energy costs and increased environmental awareness.

The STC-077 employs a robust stainless-steel tank construction that not only provides durability but also mitigates the risk of corrosion, ensuring longevity and reliability. This innovative design approach helps extend the product's lifespan while maintaining consistent performance throughout its use. Coupled with superior insulation, users can expect minimal heat loss and enhanced energy efficiency, making it a sustainable choice for consumers.

The unit is equipped with advanced controls that provide precise temperature regulation. This feature improves user experience and safety, allowing for customization to meet individual needs. Additionally, the STC-077’s intuitive digital display makes monitoring and adjusting settings straightforward, providing convenience and ease of use.

In terms of capacity, the STC-077 offers versatility with options suitable for various household sizes and demands. Whether for a small apartment or a busy commercial establishment, its modular design allows for seamless integration into existing systems while providing adequate hot water supply.

Furthermore, the STC-077 incorporates innovative technologies aimed at reducing maintenance needs. With easy access for servicing and built-in diagnostics, users can monitor performance proactively, ensuring the unit operates at optimal efficiency.

Overall, the State Industries STC-077 shines as a forward-thinking water heater. Its combination of high energy efficiency, durable construction, advanced technology, and user-friendly features make it a comprehensive solution for those seeking reliable hot water with minimal environmental impact. Whether for homeowners looking to lower energy bills or businesses seeking dependable performance, the STC-077 stands out as a premier choice in water heating solutions.
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