Manuals / Bosch Appliances / Household Appliance / Water Heater

Bosch Appliances GWH-345/450-ESR-L, GWH-345/450-ESR-N manual Maintenance and service, Service mode

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

1 40
Download 40 pages 52.3 Kb
Page 30
Image 30

Maintenance and service

5Maintenance and service

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

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

To remove front cover

BLoosen the two Philips head screws (as shown in Fig. 2).

B Pull control panel upwards and then pull it downwards.

BLift front cover panel upward and remove.

Yearly maintenance

Refer to diagrams on pages 35 and 36.

•Inspect venting system for leaks, blockage or other damage

•Unclip 4 access clips and remove cover to inspect and clean burner assembly

•Manual operation of the pressure relief valve to insure correct operation

•If flow is reduced or error AA is activated, flush the heat exchanger with a descaling solution if mineral build up is evident. Scale build up will shorten the life of the water heater and is not covered by warranty. Descale heat exchanger thoroughly and repeat annually depending on mineral content of ground water.

5.1Service mode

The service mode provides diagnostic information to the technician with a variety of real time parameters. See Table 15 for the parameters and their respective meaning.

Accessing the service mode

BSwitch on the equipment.

BPress and hold the reset button

BRotate the hot water temperature sensor dial to the minimum and to the maximum.

Now the appliance is in the Service Mode.

Selecting parameter

BRotate the recirculating water temperature selector

(left dial) to scan the different parameters.

Rotating clockwise accesses the next parameter (increasing).

Once the desired parameter number has been selected, the digital display will change to the value stored in that parameter.

Adjusting parameters

BRotate hot water temperature selector dial to change the value of the parameter (only parameter 03 and 22).

30

6 720 607 909

Page 29 Page 31
Page 30
Image 30
Bosch Appliances GWH-345/450-ESR-L, GWH-345/450-ESR-N manual Maintenance and service, Service mode
Page 29 Page 31

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.