Installation instructions

3Installation instructions

3.1Introduction

Please follow these instructions. Failure to follow instructions may result in:

Property damage or personal injury

Improper operation

Heater damage

Loss of warranty.

Please contact Bosch Water Heating with any questions.

3.2Proper location for installing your heater

Carefully select the location of the water heater. For your safety and for proper heater operation, you must provide combustion air to the heater and a proper exhaust vent system.

Follow the guidelines below:

B 1. Locate the heater where venting, gas and plumbing connections are feasible and convenient.

B2. The hot water lines should be kept short to save energy. Centrally locating the water heater is best. It is always best to have hot water lines insulated.

Warning: The water in this recirculating water heater is cold and always remains cold except for the times the burners are on. In the event of power outage in conjunction with

freezing temperatures, it is recommended that the heater be drained to prevent heater from freezing. See chapter 9 for draining instructions.

Warning: Flammable materials, gasoline, pressurized containers, or any other items or articles that are potential fire hazards must NOT be placed on or adjacent to the heater. The appliance area must be kept free of all combustible materials, gasoline and other flammable vapors and liquids.

3.3Heater placement and clearances

The GWH-345/450-ESR is design certified for installation on a combustible wall (see 3.4 Mounting installation) provided the floor covering below the heater is noncombustible. For installations in an alcove or closet, maintain the minimum clearances to combustible and non-combustible materials listed below. See also fig. 5.

A. Top 12 inches (305 mm)

B. Front 4 inches (100 mm)

C. Back 0 inches

D. Sides ½ inches (12 mm)

E. Bottom 12 inches (305 mm)

Clearances from any exhaust vent pipe are dependent upon the clearance requirements of the stainless steel vent pipe manufacturer. Single wall sealed stainless steel (AL29-4C) vent pipe (rated for Category III appliances) must be used when exhaust venting this appliance. See 3.6 Venting.

3.4Mounting installation

Warning: before starting installation:

B check that there are no loose parts inside the appliance

Bcheck that the gas type of the heater matches the gas supply you will be connecting to the heater.

Bensure that gas pipe, gas valve, fan and burner have no damage and are proper- ly fitted.

Front cover should be removed (see i instructions on page 5) in order to inspect

components visually.

BSecure the wall mounting bracket provided with the heater to a wall surface.

Warning: Do not install this appliance on a carpeted wall. The heater must be mounted on a wall using appropriate anchoring materials.

If wall is a stud wall sheathed with plasterboard, it is rec- ommended that support board(s), either 1x4’s or 1/2" (minimum) plywood first be attached across a pair of studs. Then attach the heater’s bracket to the upper support board. The heater should be kept level on the wall surface. See Fig. 10.

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Bosch Appliances GWH-345/450-ESR-L Installation instructions, Introduction, Proper location for installing your heater

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.