Bosch Appliances GWH-345/450-ESR-N manual Temperature Modulated with Electronic Ignition

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GWH 345/450 ESR

Temperature Modulated with Electronic Ignition

Suitable for heating and recirculating potable water

GWH-345/450-ESR-N - Natural Gas GWH-345/450-ESR-L - Liquefied Petroleum (LP) Gas

6 720 607 909 US (2008.02) JS

Warning: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. Do not store or use gasoline or other flammable vapor and liquids in the vicinity of this or any other appliance.

Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to this manual. For assistance or additional information consult a qualified installer, service agency or the gas supplier.

In the Commonwealth of Massachusetts this product must be installed by a licensed plumber or gas fitter.

Upon completion of the installation, these instructions should be handed to the user of the appliance for future reference.

What to do if you smell gas

•Close gas valve. Open windows and doors, and evacuate the building.

•Do not try to operate any appliance.

•Do not touch any electrical switch; do not use any phone in your building

•Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

•If you cannot reach your gas supplier, call the fire department.

•Installation and service must be performed by a qualified installer, service agency or the gas supplier.

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Contents What to do if you smell gas Temperature Modulated with Electronic IgnitionIndex For your safetyIndex FCC GWH-345/450-ESR Specifications Technical data FeaturesAppliance details Appliance details Water resistant Unpacking the GWH-345/450-ESR heaterInlet air restrictors GWH-345/450-ESR is not approved or designed forGeneral rules to follow for safe operation Dimensions Dimensions and minimum installation clearancesIntroduction ApplicationsPump Sizing Instantaneous water heater direct tank load designInlet PressureWater flow rate Water qualityProper location for installing your heater Installation instructionsHeater placement and clearances Mounting installationTwin pipe Combustion air requirementsSingle pipe Appliances located in unconfined spaces720 607 Venting Vent material and specificationsVent lengths Vent material Vent Safety SystemExhaust vent connection Exhaust Installation instructions Selecting inlet air restrictorIntake ExampleMounting sequence Combustion air inlet connectionRoom sealed installation Twin pipe Installation instructions Condensate drain requirementsInterior masonry chimneys Vent terminationsExterior Masonry Chimney Horizontal terminations720 607 Description Minimum distance Horizontal side wall venting installation GAS Connections Gas piping & connectionsFor Natural GAS Checking restrictor plate size by measuring CO2 level value Measuring gas pressureElectrical connections Water connectionsOperating instructions For your safety read before operating your water heaterInitial filling instructions Operating instructionsRecirculating water temperature PowerTemperature and hot water flow Freeze protectionElectrical scheme Electrical diagramService mode Maintenance and serviceExiting service mode Maintenance and service Mode Parameter ValuesParameter storage Troubleshooting TroubleshootingFault Indication Possible Cause Check Check air vent GWH-345/450-ESR Functional scheme GWH-345/450-ESR Functional schemeInterior components diagram and parts list Interior components diagram and parts listInterior components Components Diagram Components diagramDescription Reference Parts listProtecting the environment Protecting the environmentPacking ComponentsTen Year Limited Warranty Bosch Thermotechnology Corporation

GWH-345/450-ESR-L, GWH-345/450-ESR-N specifications

Bosch Appliances has long been recognized for its innovative and high-quality home appliances, and the GWH-345/450-ESR-N and GWH-345/450-ESR-L water heaters are no exception. These models offer exceptional efficiency and reliability, making them ideal choices for modern households seeking dependable water heating solutions.

One of the standout features of the GWH-345/450-ESR series is their impressive energy efficiency. Engineered with cutting-edge technology, these units operate with high thermal efficiency ratings. This not only translates to reduced energy bills for consumers but also supports environmentally friendly practices by minimizing energy consumption. The tankless design eliminates the need for a storage tank, providing hot water on demand while ensuring that no energy is wasted in heating and re-heating stored water.

Both models come equipped with advanced safety features. The integrated combustion management system ensures precise control of the combustion process, which not only enhances heating efficiency but also reduces the risk of overheating. Additionally, the built-in safety mechanisms, such as flame failure protection and overheat protection, provide consumers with peace of mind knowing their home is protected.

These Bosch water heaters also feature a user-friendly digital display that allows for easy temperature adjustment and monitoring. The intuitive interface enables users to set their desired water temperature with precision, ensuring comfort and convenience. Furthermore, these models are designed for quiet operation, making them suitable for installation in various locations within the home without causing disruptive noise.

The construction of the GWH-345/450-ESR-N and GWH-345/450-ESR-L models is robust, featuring high-quality materials that ensure durability and longevity. The compact and sleek design allows for flexible installation options, even in smaller spaces. With a variety of venting options available, including direct vent and power vent configurations, these heaters can fit seamlessly into different home layouts.

In summary, Bosch Appliances GWH-345/450-ESR-N and GWH-345/450-ESR-L models represent the pinnacle of modern water heating technology. With their energy-efficient performance, advanced safety features, user-friendly controls, and durable construction, these water heaters are designed to meet the demands of today’s homes while delivering reliable hot water whenever needed. These innovative appliances reinforce Bosch's reputation as a leader in home heating solutions, ensuring that customers can enjoy hot water with confidence and peace of mind.
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