State Industries STC-077 dimensions Pressure Switch Continuity Test

Page 25

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

PRESSURE SWITCH CONTINUITY

STEP 7

PRESSURE SWITCH CONTINUITY TEST

STEP 7: CHECK FOR CONTINUITY BETWEEN PRESSURE SWITCH TERMINALS WITH WIRES REMOVED.

Condition:

•On/Off switch is off.

•All wires are disconnected from all pressure switches.

•Multimeter is set to lowest ohms scale.

IF…

THEN

 

 

 

 

blocked inlet switch does not show continuity

replace switch.

 

 

blocked inlet switch does show continuity

continue.

 

 

blower proving switch does show continuity

replace switch.

 

 

blower proving switch does not show continuity

continue.

 

 

 

check for minimum supply gas

 

pressure of

low gas pressure switch does not show continuity

5.0” W.C. natural gas

9.0” W.C. LP gas

 

 

replace switch if gas pressures

 

are above these minimums.

 

 

low gas pressure switch does show continuity

continue.

 

 

blocked outlet pressure switch does not show continuity

replace switch.

 

 

blocked outlet pressure switch does show continuity

reconnect all wires to pressure

switches; continue to Step 8.

 

 

 

Technical Training Department

24

State Water Heaters

STC-077

Ashland City, Tennessee © 2004

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Page 24 Page 26
Contents Commercial Table of Contents SUF Service HandbookTools Required IntroductionGAS Supply Specifications InstallationClearances GAS RequirementsEquivalent Feet of Pipe Intake or Exhaust VentingDirect Venting Vent Length Table Number Minimum Maximum Elbows Pipe FeetVenting Materials Venting ConfigurationsConcentric Vent Termination Horizontal Installation Vertical InstallationSUF Model Venting ClearancesExterior Sidewall Clearances AIR Requirements Direct Vent InstallationMAKE-UP AIR Vertical Ducts Direct CommunicationInsufficient MAKE-UP AIR Horizontal DuctsBackdraft Flammable Items Contaminated AIRMultiple Unit Water Piping Condensation Sequence of Operation OperationControls Normal Indications / Readings / SettingsDuring Call for Heat Display Circuit Board Ignition Circuit Board Circut BoardsPRE-SERVICE Tips TroubleshootingVAC to Control VAC to Control BoardVAC to Transformer TransformerVAC from Transformer VAC to ECO ECO CheckCheck for 24 VAC Between PIN 1 on CN3 Plug and Ground VAC from ECOTemperature Probe Resistance Temperature ProbeUpper Lower Temperature Probe PlugPressure Switch Continuity Test Pressure Switch ContinuityVAC to Blower BlowerTake AIR and GAS Pressure Readings Pressure Switch PerformanceAmbient Room AIR Pressure Only Pressure Switch Continuity Test OperationalVAC to Ignitor VAC to IgnitorIgnitor Resistance Check Ignitor ResistanceSUF 240 only GAS Valve TestVAC to GAS Valve Supply GAS Pressure Test GAS Pressure CheckManifold GAS Pressure Test Orifice Table Component InformationPressure Swtches Pressure Switches Part Number / Activation PRESSURE† Pressure SwitchesWiring Diagrams Service Aids T E S SUF MufflerWhen should SUF’s be delimed? Questions and AnswersHow often should the anodes be inspected? Code Indication Error CodesCode #S AboveIII. GAS Pressure Fill in Blank ALL Units on Service ChecklistState Water Heaters SUF Models 100 150, 100 199 and 100Description SUF Ultra Force SUF Models Replacement PartsUltra 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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