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Bosch WH27 User Manual

Bosch WH27
80 pages
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en Installation Manual and Operating Instructions 2
es Instrucciones de instalación y funcionamiento 28
fr Instructions d'installation et d'utilisation 54
PRO tankless electric water heaters
TRONIC 5000C Pro
6720646951-00.1V
Models: WH17 / WH27
6 720 646 951 (2011/09) US
IMPORTANT: This booklet should be given to the customer after installation and demonstration.
For Service & Installation contact:
BOSCH Thermotechnology Corp.
50 Wentworth Avenue, Londonderry
NH 03053
Phone: 800-798-8161
www.bosch-climate.us

Table of Contents

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Bosch WH27 Specifications

General IconGeneral
Gas Connection1/2 inch
Water Connection1/2 inch
Fuel TypeNatural Gas
CapacityN/A (Tankless)
Frequency60 Hz
Safety FeaturesFlame failure protection, overheat protection
InstallationIndoor

Summary

Explanation of Symbols and Safety Information

Explanation of Symbols

Explains the meaning of symbols used in the manual for warnings and general information.

Safety Precautions

Provides essential safety precautions for using the electrical equipment, including grounding and installation.

General Information

Disclaimer and Approval

Contains legal disclaimers and approval numbers for installation in specific regions.

Technical Identification

Details codes for identifying technical specifications and model variations of the water heater.

Package Contents

Lists the items included in the product package, such as the heater and mounting hardware.

Components Diagram

Illustrates and labels the various components of the water heater unit.

Dimensions

Provides detailed measurements and dimensions of the water heater unit in inches.

Wiring Diagram

Presents the internal wiring schematic for the water heater, detailing electrical connections.

Functionality Overview

Explains the operational principles of the tankless water heater and how it heats water.

Technical Specifications

Lists the technical specifications of the water heater, including voltage, amperage, and output.

Regulations

Installation

Important Installation Information

Provides critical safety warnings and general notes regarding the installation process.

Site Selection and Freeze Prevention

Guides on choosing a suitable location and preventing freezing issues for the water heater.

Mounting the Water Heater

Details the procedure for physically mounting the water heater unit onto the wall.

Water Connections

Provides instructions and requirements for connecting the water supply to the heater.

Electrical Connections

Details the steps and safety precautions for making the electrical connections to the unit.

Startup and Adjustments

Covers the initial startup procedures, leak checks, and adjustments for temperature and flow.

Operation Instructions

Before Using the Water Heater

Provides essential checks and steps to follow before operating the water heater for the first time.

Maintenance

Draining the Heater

Instructions on how to drain the water heater to minimize the risk of freeze damage.

Checking Inlet Water Filter Screen

Details the annual procedure for checking and cleaning the water heater's inlet filter screen.

Troubleshooting

Cold Water Only - Neon Light Off

Addresses issues where only cold water is produced and the neon indicator light is off.

No Electricity or Supply Failure

Troubleshoots problems related to lack of electricity or failure of one of the power supplies.

Heating Module Thermal Cut-outs Tripped

Diagnoses issues where one or more heating module thermal cut-outs may have tripped.

Inlet Water Temperature Too Cold

Diagnoses and resolves issues where the inlet water temperature is too low for heating.

Premature Element Failure

Addresses potential premature failure of heating elements and how to test them.

Water Flow Too Low

Troubleshoots low water flow issues, including plumbing restrictions and pressure problems.

Water Temperature Too Hot

Addresses issues where the water temperature is too high, caused by dial settings or flow rates.

Water Temperature Fluctuates

Explains why water temperature may fluctuate and how to resolve it, considering pressure and flow changes.

Spare Parts

Spare Parts Identification

Identifies and illustrates the individual components available as spare parts for the water heater.

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