Bosch Appliances ESVVT, GWH 2700 ES LP manual General rules to follow for safe operation, Venting

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Appliance details

2.4General rules to follow for safe operation

B1. You must follow these instructions when you install your heater. In the United States: The installation must conform with local codes or, in the absence of local codes, the National Fuel Gas Code ANSI Z223.1/ NFPA 54.

In Canada: The Installation must conform with CGA B149.(1,2) INSTALLATION CODES and /or local installation codes.

B2. Carefully plan where you install the heater. Correct combustion air supply and vent pipe installation are very important. If not installed correctly, fatal accidents can occur, such as carbon monoxide poisoning or fire.

B3. When the unit is installed indoors and ROOM SEALED (twin pipe) it is permitted to be located in bathrooms, bedrooms and occupied rooms that are normally kept closed. See chapter 3.3 (page 9). If the unit will be installed indoors and use indoor combustion air, the place where you install the heater must have enough ventilation. The National Fuel

Gas Code does not allow UNSEALED gas fired water heater installations in bathrooms, bedrooms or any occupied rooms normally kept closed. See chapter 3.5 (page 21) and 3.4 (page 20).

B4. You must vent your heater. See chapter 3.3 on

VENTING.

B5. The appliance and its gas connection must be leak tested before placing the appliance in operation. The appliance must be isolated from the gas supply piping system by closing its individual manual gas shutoff valve (not supplied with heater) during any pressure testing at pressures in excess of ½ Psig (3.5 kPa).

B6. Keep water heater area clear and free from combustibles and flammable liquids. Do not locate the heater over any material which might burn.

B7. Correct gas pressure is critical for the proper operation of this heater. Gas piping must be sized to provide the required pressure at the maximum output of the heater, while all the other gas appliances are in operation. Check with your local gas supplier, and see the section on connecting the gas supply. See Section 3.8, page 17.

B8. Should overheating occur or the gas supply fail to shut off, turn off the gas supply at the manual gas shut off valve, on the gas line. Note: manual gas shutoff valve is not supplied with the heater but must be field installed.

B9. Do not use this appliance if any part has been underwater. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been underwater.

B 10. Failure to install heater correctly may lead to unsafe operation and void the warranty.

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Contents What to do if you smell gas Intended for variable flow applicationsIndex For your safety Appliance details FeaturesSpecifications Technical data Unpacking the heater To remove combustion cover service onlyGWH 2700 ES is not approved or designed for Venting General rules to follow for safe operationDimensions Dimensions and Minimum installation clearancesVenting Installation instructionsTools required for installation IntroductionVenting Specifications Installation instructions Horizontal venting systems onlyFittings or Piping Equivalent Feet Maximum combustion air and exhaust pipe length Installation instructions Condensate drain requirementsTwin pipe termination clearances Minimum combustion air and exhaust pipe lengthCanadian installations1 Installations2 Canadian installations1 Horizontal twin pipe penetration Vent connections Vertical venting installation twin pipe penetra- tionVenting Flex ProTech Heat Fab Installation instructions Condensate drain installationExample Total equivalent vent length calculationExhaust IntakeAdjusting maximum power fan speed P1 Adjusting minimum power fan speed P2Level Vent length1 Speed P2 Installation instructions Twin pipe and Concentric pipe Combustion air requirementsHeater placement and clearances Proper location for installing your heaterMounting installation Gas piping & connections GAS Line Sizing For Natural GAS Water quality Water connectionsGWH Domestic hot water recirculationOperating Pressure Test Connecting manometerMeasuring gas pressure Static Pressure TestElectrical connections Electrical power supplyPosition of the fuses in control unit LCD Display functions Operation instructionsPower For your safety read before operating your water heaterTemperature selection Program button Use of optional remote control Accessory part no. TSTAT2Reset button OperationWinterizing for seasonal use Maintenance and serviceAnnual maintenance table Every year Annual maintenanceDescaling using a pump Adjusting CO2 carbon dioxideMineral scale build-up Once Gas Pressure is adequate Measuring CO2 combustion cover must be installedAdjusting CO2 Returning to Service% 3.0 % 60 ppm Final ReadingsProgram values Program Description Factory DefaultComment Diagnostic menu Control board diagnosticsWater is not hot enough TroubleshootingTroubleshooting Water is too hotLow water flow/pressure Hot water temperature fluctuates at tapNoisy burner/heater during operation Lack of adequate gas pressure. Inadequate gas Error code diagnostics Problem solvingVenting may cause this failure Problem solving Display Cause SolutionOver-temperature detected by No flame ionization detected with Electrical diagram Electrical diagramSensor resistance charts Back Flow characteristics Functional scheme GWH 2700 ES 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 Components Protecting the environmentProtecting the environment PackingLimited Warranty Limited Warranty 6720608542