Bosch Appliances GWH 2400 ES NG Maintenance and service, Annual maintenance table Every year

Page 27

Maintenance and service

6Maintenance and service

Warning: Always turn off the electrical power supply, turn off the manual gas shut off valve and turn off the water shut off valves whenever servicing.

Caution:

B Check and clean the complete water heating system once a year.

B Carry out a maintenance overhaul if necessary. Immediately repair defects to avoid damage to the system.

Annual maintenance table

 

 

Every year

 

 

 

1.

Inspect venting system

X

 

 

 

2.

Inspect heat exchanger

X

 

 

 

3.

Inspect burner

X

 

 

 

4.

Inspect condensate trap

X

 

 

 

5.

Inspect water filter

X

 

 

 

Table 13 Annual maintenance

The unit should be checked once a year by a gas technician. If repairs are needed, the repairs should be done by a gas technician.

6.1Annual maintenance

(To remove front cover, see page 6.)

Venting System

Venting system - inspect inside of flue pipe for any blockage or restriction. Observe burner flames during heater operation. (Vent pipe must be removed). Inspect the combustion air inlet pipe for blockage or debris. Inspect combustion air and exhaust terminations for blockage or debris.

Combustion chamber

Inspect burner observation window (Fig. 63, #10) for cracks or spillage of flue gases. Observe burner flames during heater operation. Flames should be steady and blue with no signs of yellowing. Yellow burner flames are an indication of improper combustion. Refer to Section 3.4 & 3.3 of this manual to ensure that exhaust system and combustion air supply meets manufacturer's specifications.

Inlet water filter

Verify the inlet filter screen is clean and undamaged. The inlet water filter is located inside the cold water inlet fitting on the right side of the appliance (See Fig. 51, page 27). Close installer supplied cold water shutoff and loosen slotted screw on inlet fitting. Water will drain from the appliance. Remove cylindrical filter inside.

Fig. 51 Water filter

1Inlet water filter

2 Water filter

Descaling

In areas where the water supply has a high mineral content (see Table 9, page 20), the heat exchanger should be periodically flushed with a descaling solution. Scale build up will shorten the life of the water heater and damage resulting from is not covered under warranty. Refer to section 6.3 for detailed instructions on descaling the heat exchanger.

Heat exchanger fin coils

Inspect heat exchanger fincoil for soot build-up or blockage. To access fincoil, venting must be removed from flue gas exhaust accessory. With venting removed and inspect fincoil below with a flashlight. If there is evidence of soot build-up or blockage, the heat exchanger should be removed by a professsional and cleaned thoroughly. To remove the heat exchanger, consult service bulletin at www.boschhotwater.com.

6.2Winterizing for seasonal use

Installation instructions state that the water heater must not be installed in a location where it may be exposed to freezing temperatures. If the heater must be left in a space which is likely to experience freezing temperatures, all water must be drained from the heater. If precautions are not taken, resulting damage will not be covered under the warranty. NOTE: Use of agents

6 720 608 782

27

Image 27
Contents What to do if you smell gas Intended for variable flow applicationsIndex FCC For your safetyFeatures GWH 2400 ES Specifications Technical dataAppliance details Unpacking the GWH 2400 ES heater To remove combustion cover service only General rules to follow for safe operationAppliance details To remove front cover Dimensions Dimensions and Minimum installation clearancesVenting Installation instructionsTools required for installation IntroductionFittings or Piping Equivalent Feet Vent Safety SystemDescription Minimum distance Installation instructions Venting configuration examples Installation instructions Condensate drain requirements Room sealed installation Twin Pipe SystemVenting Flex ProTech Heat Fab Exhaust Determining installation adjustmentInstallation instructions Vent connections Twin pipe Combustion air requirementsProper location for installing your heater Heater placement and clearancesMounting installation Gas piping & connections GAS Connections For Natural GAS Water quality Water connectionsRecirculation application Recirculation applicationMeasuring gas pressure Electrical power supply Electrical connectionsPosition of the fuses in control unit LCD Display functions Operation instructionsFor your safety read before operating your water heater PowerTemperature 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 maintenanceAdjusting CO2 carbon dioxide Descaling using a pumpMineral scale build-up Once Gas Pressure is adequate Measuring CO2 combustion cover must be installedAdjusting CO2 Returning to Service% 2.8 % 60 ppm Final ReadingsProgram Description Factory Default Program valuesComment Diagnostic menu Control board diagnosticsExample Fan speed adjustmentTotal vent length calculation IntakeMode Pipe Length1 Fan speed Maintenance and service To select fan speedWater is not hot enough TroubleshootingTroubleshooting Water is too hotHot water temperature fluctuates at tap Low water flow/pressureNoisy burner/heater during operation Troubleshooting 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 2400 ES Functional schemeInterior components diagram and parts list Interior components diagram and parts listInterior components Appliance overview Item Description Components diagramGroup Description ReferenceInterior 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 Components Protecting the environmentProtecting the environment PackingLimited 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.