Bosch Appliances GWH 2700 ES NG, GWH 2700 ES LP, ESVVT manual Appliance overview

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Interior components diagram and parts list

Fig. 65 Appliance overview

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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 GWH 2700 ES is not approved or designed for To remove combustion cover service onlyUnpacking the heater General rules to follow for safe operation VentingDimensions and Minimum installation clearances DimensionsIntroduction Installation instructionsTools required for installation VentingFittings or Piping Equivalent Feet Installation instructions Horizontal venting systems onlyVenting Specifications Minimum combustion air and exhaust pipe length Installation instructions Condensate drain requirementsTwin pipe termination clearances 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 FabIntake Total equivalent vent length calculationExhaust ExampleLevel Vent length1 Speed P2 Adjusting minimum power fan speed P2Adjusting maximum power fan speed P1 Installation instructions Combustion air requirements Twin pipe and Concentric pipeMounting installation Proper location for installing your heaterHeater placement and clearances Gas piping & connections GAS Line Sizing For Natural GAS Water connections Water qualityDomestic hot water recirculation GWHStatic Pressure Test Connecting manometerMeasuring gas pressure Operating Pressure TestPosition of the fuses in control unit Electrical power supplyElectrical connections Operation instructions LCD Display functionsTemperature selection For your safety read before operating your water heaterPower Operation Use of optional remote control Accessory part no. TSTAT2Reset button Program buttonAnnual maintenance Maintenance and serviceAnnual maintenance table Every year Winterizing for seasonal useMineral scale build-up Adjusting CO2 carbon dioxideDescaling using a pump Returning to Service Measuring CO2 combustion cover must be installedAdjusting CO2 Once Gas Pressure is adequateFinal Readings % 3.0 % 60 ppmComment Program Description Factory DefaultProgram values Control board diagnostics Diagnostic menuWater is too hot TroubleshootingTroubleshooting Water is not hot enoughNoisy burner/heater during operation Hot water temperature fluctuates at tapLow water flow/pressure 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 Interior components diagram and parts listInterior components diagram and parts list Appliance overview Description Reference Components diagramGroup Interior components diagram and parts list Group 1211 6720608158-73.1AL Interior components diagram and parts list Group 708 300 Packing Protecting the environmentProtecting the environment ComponentsLimited Warranty Limited Warranty 6720608542