Bosch Appliances ESVVT, GWH 2700 ES LP manual Lack of adequate gas pressure. Inadequate gas

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Troubleshooting

5.Lack of adequate gas pressure. Inadequate gas

pressure will cause the fuel-to-air mixture (CO2) to be out of adjustment. This will result in unstable burner flames and noise. Ensure gas pressure is in accordance with specifications in section 3.12, page

27Measuring Gas Pressure. A gas pressure reading is needed to proceed further. Contact your original installer or a local certified gas technician to obtain this reading.

6.Verify proper CO2 readings per chapter 6.4, page

33.CO2 adjustments must be done by a certified gas technician with a calibrated combustion gas analyzer.

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Contents Intended for variable flow applications What to do if you smell gasIndex For your safety Features Appliance detailsSpecifications Technical data Unpacking the heater To remove combustion cover service onlyGWH 2700 ES is not approved or designed for General rules to follow for safe operation VentingDimensions and Minimum installation clearances DimensionsInstallation instructions Tools required for installationIntroduction VentingVenting Specifications Installation instructions Horizontal venting systems onlyFittings or Piping Equivalent Feet Installation instructions Condensate drain requirements Twin pipe termination clearancesMinimum combustion air and exhaust pipe length Maximum combustion air and exhaust pipe lengthCanadian installations1 Installations2 Canadian installations1 Horizontal twin pipe penetration Vertical venting installation twin pipe penetra- tion Vent connectionsInstallation instructions Condensate drain installation Venting Flex ProTech Heat FabTotal equivalent vent length calculation ExhaustIntake ExampleAdjusting maximum power fan speed P1 Adjusting minimum power fan speed P2Level Vent length1 Speed P2 Installation instructions Combustion air requirements Twin pipe and Concentric pipeHeater placement and clearances Proper location for installing your heaterMounting installation Gas piping & connections GAS Line Sizing For Natural GAS Water connections Water qualityDomestic hot water recirculation GWHConnecting manometer Measuring gas pressureStatic Pressure Test Operating Pressure TestElectrical connections Electrical power supplyPosition of the fuses in control unit Operation instructions LCD Display functionsPower For your safety read before operating your water heaterTemperature selection Use of optional remote control Accessory part no. TSTAT2 Reset buttonOperation Program buttonMaintenance and service Annual maintenance table Every yearAnnual maintenance Winterizing for seasonal useDescaling using a pump Adjusting CO2 carbon dioxideMineral scale build-up Measuring CO2 combustion cover must be installed Adjusting CO2Returning to Service Once Gas Pressure is adequateFinal Readings % 3.0 % 60 ppmProgram values Program Description Factory DefaultComment Control board diagnostics Diagnostic menuTroubleshooting TroubleshootingWater is too hot Water is not hot enoughLow water flow/pressure Hot water temperature fluctuates at tapNoisy burner/heater during operation Lack of adequate gas pressure. Inadequate gas Problem solving Error code diagnosticsProblem solving Display Cause Solution Venting may cause this failureOver-temperature detected by No flame ionization detected with Electrical diagram Electrical diagramSensor resistance charts Back Flow characteristics GWH 2700 ES Functional scheme Functional schemeInterior components diagram and parts list Interior components diagram and parts listInterior components Appliance overview Group Components diagramDescription Reference Interior components diagram and parts list Group 1211 6720608158-73.1AL Interior components diagram and parts list Group 708 300 Protecting the environment Protecting the environmentPacking ComponentsLimited Warranty Limited Warranty 6720608542
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