Bosch Appliances GWH 2400 ES LP, GWH 2400 ES NG manual Installation instructions Vent connections

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Installation instructions

3.3.3Vent connections

BAttach the flue gas exhaust accessory (8 705 504

151)to the top of the unit (position 1) using the 4 screws and gasket provided. Fully insert stainless steel vent pipe 1.5” minimum into the accessory and tighten the clamp (position 2).

Fig. 20

B Attach the combustion air inlet accessory (8 705 504 154) to the top of the unit (position 3) using the 3 screws and gasket provided, and install air intake pipe over the accessory. NOTE: The appliance has the option to mount the combustion air inlet acces- sory on the top right or on the top left side of the heater. The combustion air inlet that is not used must be kept sealed.

Fig. 21

BEnsure that exhaust vent pipe is fully inserted in collar to enable proper connection.

Exhaust venting must be 3" or 4" sealed

isingle wall stainless steel (AL29-4C) vent pipe.

Attention residents of the Commonwealth of Massachusetts:

In the Commonwealth of Massachusetts the following regulation went into effect on 12/30/2005:

(a)For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied:

1.INSTALLATION OF CARBON MONOXIDE DETECTORS. At the time of installation of the side wall horizontal vented gas fueled equipment, the installing plumber or gasfitter shall observe that a hard wired carbon monoxide detector with an alarm and battery back-up is installed on the floor level where the gas equipment is to be installed. In addition, the installing plumber or gasfitter shall observe that a battery operated or hard wired carbon monoxide detector with an alarm is installed on each additional level of the dwelling, building or structure served by the side wall horizontal vented gas fueled equipment. It shall be the responsibility of the property owner to secure the services of qualified licensed professionals for the installation of hard wired carbon monoxide detectors.

a. In the event that the side wall horizontally vented gas fueled equipment is installed in a crawl space or an at tic, the hard wired carbon monoxide detector with alarm and battery back-up may be installed on the next adjacent floor level.

b. In the event that the requirements of this subdivision can not be met at the time of completion of installation, the owner shall have a period of thirty (30) days to comply with the above requirements; provided, however, that during said thirty (30) day period, a battery operated carbon monoxide detector with an alarm shall be installed.

2.APPROVED CARBON MONOXIDE DETECTORS. Each carbon monoxide detector as required in accordance with the above provisions shall comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certified.

3.SIGNAGE. A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum height of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment. The sign shall read, in print size no less than one half (1/2) inch in size, "GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS".

4.INSPECTION. The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation unless, upon inspection, the inspector observes carbon monoxide detectors and

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Contents Intended for variable flow applications What to do if you smell gasIndex For your safety FCCAppliance details FeaturesGWH 2400 ES Specifications Technical data Unpacking the GWH 2400 ES heater Appliance details To remove front cover To remove combustion cover service onlyGeneral rules to follow for safe operation Dimensions and Minimum installation clearances DimensionsIntroduction Installation instructionsTools required for installation VentingVent Safety System Fittings or Piping Equivalent FeetDescription Minimum distance Installation instructions Venting configuration examples Venting Flex ProTech Heat Fab Installation instructions Condensate drain requirementsRoom sealed installation Twin Pipe System Determining installation adjustment ExhaustInstallation instructions Vent connections Combustion air requirements Twin pipeMounting installation Proper location for installing your heaterHeater placement and clearances Gas piping & connections GAS Connections For Natural GAS Water connections Water qualityRecirculation application Recirculation applicationMeasuring gas pressure Position 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 % 2.8 % 60 ppmComment Program Description Factory DefaultProgram values Control board diagnostics Diagnostic menuIntake Fan speed adjustmentTotal vent length calculation ExampleMaintenance and service To select fan speed Mode Pipe Length1 Fan speedWater is too hot TroubleshootingTroubleshooting Water is not hot enoughNoisy burner/heater during operation Hot water temperature fluctuates at tapLow water flow/pressure Troubleshooting 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 2400 ES Functional scheme Functional schemeInterior components Interior components diagram and parts listInterior components diagram and parts list Appliance overview Description Reference Components diagramGroup Item DescriptionInterior components diagram and parts list Group Interior components diagram and parts list Group Interior components diagram and parts list Group Interior components diagram and parts list Group 708 300 Packing Protecting the environmentProtecting the environment ComponentsLimited Warranty Bosch Thermotechnology Corporation

GWH 2400 ES NG, GWH 2400 ES LP specifications

Bosch Appliances has established a reputation for delivering high-quality and innovative home solutions, and the Bosch GWH 2400 ES LP and GWH 2400 ES NG are no exceptions. These high-efficiency water heaters are designed to provide on-demand hot water, ensuring comfort and convenience for your home.

One of the standout features of the Bosch GWH 2400 ES LP (Liquid Propane) and GWH 2400 ES NG (Natural Gas) models is their compact, space-saving design. These tankless water heaters are engineered to fit in smaller spaces, making them an ideal choice for homes with limited installation areas. Despite their compact size, both models provides a powerful performance that meets the hot water needs for multiple fixtures simultaneously, such as showers, faucets, and washing machines.

These water heaters are equipped with advanced technology that enables precise temperature control. The Bosch GWH 2400 ES series utilizes a microprocessor-based control system that allows for consistent water heating, ensuring the water temperature remains stable even during high demand. The modulating gas valve further optimizes energy consumption, adjusting the flame intensity to meet the exact heating needs, thus enhancing efficiency.

In terms of safety, both the GWH 2400 ES LP and NG come with multiple safety features. These include a flame failure safeguard, overheating protection, and a built-in freeze protection system. Such features ensure both peace of mind and the longevity of the unit.

Installation is straightforward with these models, as they can be vented using standard venting materials, saving time and costs. Additionally, the units boast a low NOx emissions rating, making them environmentally friendly choices that help homeowners reduce their carbon footprint.

Maintenance is minimal, thanks to the corrosion-resistant heat exchanger which ensures durability and long service life under normal operating conditions. This factor, combined with Bosch’s renowned commitment to quality, makes these models a reliable investment for any household.

Whether you opt for the GWH 2400 ES LP or the GWH 2400 ES NG, you will experience the benefits of a powerful, efficient, and safe water heating solution tailored to your specific household needs. Bosch has truly combined technology, sustainability, and user comfort in these innovative models, solidifying their place as leaders in the home appliance market.
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