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Bosch Appliances GWH-345/450-ESR-N manual Interior components diagram and parts list, Components

Models: GWH-345/450-ESR-L GWH-345/450-ESR-N

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Interior components diagram and parts list

8Interior components diagram and parts list

8.1Interior components

Fig. 37 Components

1Combustion air inlet adapter (right side only)

2 Exhaust adapter with CO2 measuring point

3 Front cover

4 On/Off button

5 Reset button

6 Recirculation water temperature selector

7 LED - (ON) warning light (blinks when in lock out)

8 Domestic hot water temperature selector

12 Gas valve

20 Junction box

21 Centrifugal blower

22 Main burner

23 Heat exchanger

24 Holding bracket

25 Outlet water pipe

26 Inlet water pipe

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Bosch Appliances GWH-345/450-ESR-N, GWH-345/450-ESR-L manual Interior components diagram and parts list, Components

Contents

GWH 345/450 ESR Temperature Modulated with Electronic IgnitionSuitable for heating and recirculating potable water What to do if you smell gasIndex For your safetyIndex 1 WarningWarning The recirculating water heater must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures equal to or more than 0.5 psig 14” W.C Dimensions 2.1 Features2.2 GWH-345/450-ESR Specifications Technical data Temperature ControlInlet air restrictors Fig. 3 Service position to access water and electric connections2.3 Unpacking the GWH-345/450-ESR heater Water resistantAppliance details 2.4 General rules to follow for safe operationTable 1 Minimum clearances 2.5 Dimensions and minimum installation clearancesFig. 4 Dimensions Fig. 5 Minimum clearancesPump Sizing Fig. 7 Service position to access water and electric connections2.6 Applications Introductionwater flow rate Table 2 Venting Specificationspressure Inlet3.4 Mounting installation 3 Installation instructions3.2 Proper location for installing your heater 3.3 Heater placement and clearancesSingle pipe 3.5 Combustion air requirementsFig. 10 Mounting the heater Twin pipe1000 Btu/hr 292.81 watts if all air is taken from inside the building Appliances located in confined spacesInstallation instructions Vent lengths 3.6.1 Vent material and specificationsTable 3 Venting Specifications 3.6 VentingTable 4 Vent manufacturer contact information Vent Safety SystemFig. 13 Maximum vent and combustion air lengths Vent materialInstallation instructions Fig. 14 Exhaust vent connectionTable 6 Determining equivalent vent length see example in Table Selecting inlet air restrictorExhaust IntakeFig. 15 Mounting sequence Fig. 16 Exhaust air inlet accessoryTable 8 Restrictors table Combustion air inlet connectionFig. 18 Horizontal twin pipe termination Fig. 17 Required condensate drain installation3.6.4 Room sealed installation Twin pipe 3.6.3 Condensate drain requirementsFig. 20 Vertical vent termination clearances 3.6.5 Vertical terminationsHorizontal runs Vent terminations248 CMR 5.082a1 through 3.6.6.1Requirements for installation in MassachusettsAttention residents of the Commonwealth of Massachusetts Installation instructionsMinimum distance Recommended exhaust vent terminator positionInstallation instructions DescriptionFig. 24 Vertical venting installation 3.6.7 Exhaust vent configuration examplesFig. 22 Horizontal side wall venting installation Fig. 23 Vertical venting installation - Masonry ChimneyInstallation instructions 3.7 Gas piping & connectionsGAS CONNECTIONS Maximum Capacity of Semi-Rigid flexible, non FOR NATURAL GASFOR LP GAS Installation instructionsFig. 27 Gas pressure measuring lower tapping Connecting manometer3.8 Measuring gas pressure 3.9 Checking restrictor plate size by measuring CO2 level valueInstallation instructions 3.10 Water connections3.11 Electrical connections Fig. 30 Plumbing Connections and Pressure Relief Valve4.3 Startup instructions 4.2 For your safety read before operating your water heater4 Operating instructions 4.1 Initial filling instructionsFig. 33 Recirculating water temperature adjustment 4.4 Power4.5 Recirculating water temperature 4.6 Temperature and hot water flowOperating instructions 4.8 Electrical diagramFig. 35 Electrical scheme Yearly maintenance 5 Maintenance and service5.1 Service mode Maintenance and serviceValues Exiting service modeMode ParameterPossible Cause TroubleshootingTroubleshooting Fault IndicationCheck TroubleshootingFault Indication Possible CauseFunctional scheme 7 GWH-345/450-ESR Functional schemeGWH-345/450-ESR Functional scheme Fig. 37 Components 8 Interior components diagram and parts listInterior components diagram and parts list 8.1 Interior componentsInterior components diagram and parts list 8.2 Components diagramFig. 38 Components Diagram Reference 8.3 Parts listInterior components diagram and parts list DescriptionComponents 9 Protecting the environmentProtecting the environment PackingHow to Make a Claim 10 Ten Year Limited WarrantyTen Year Limited Warranty Service Labor CostsBOSCH THERMOTECHNOLOGY CORPORATION Installer Checklist, to be performed by installer upon installation