Applications manual

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1 Introduction

The Bosch Applications Manual is intended to present some of the most common applications of the Bosch line of tankless and point of use water heaters. Application drawings are shown with both piping and corresponding electrical schematics where applicable. Auxiliary equipment depicted does not necessarily represent any one manu- facturer or specific model number. There are a wide variety of techniques, practices and piping strategies possible when installing water heating appliances. It is the responsibility of the installing contractor to determine the most suitable arrangement for the application.

Although this manual covers many common applications for our products, system possibilities are virtually endless. Should you encounter an application that is not covered in this manual or have any questions regarding any of its content, we encourage you to contact your local sales representative or us directly at Bosch Water Heating.

This is not a substitute for any of the product’s installation manuals. All specifications subject to change.

Installation must conform with local codes or, in the absence of local codes, the National Fuel Gas Code ANSI Z 223.1/NFPA 54. In Canada: Installation must conform with CGA B149.(1,2) INSTAL- LATION CODES and/or local installation codes.

2 Bosch Water Heating Models

This section describes the water heaters available from Bosch Water Heating. The information given in each section provides a general overview to the specifications of that particular model. More detai- led information is contained in the installation manuals. Download these manuals at www.BoschPro.com.

Bosch Water Heating

Applications manual 11.2007

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Bosch Appliances GWH 425 PN/HN4GWH 4254, GWH 260 PN/HN2 manual Introduction