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Bosch GWH-635-ES-N - User Manual

Bosch GWH-635-ES-N
38 pages
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Water heaters for use with Natural and L.P.G.
GWH-635-ES
Temperature Modulated with Electronic Ignition
Suitable for heating potable water only - Not approved for space heating purposes
(Intended for variable flow applications with multiple tapping points)
GWH-635-ES-N
GWH-635-ES-L
6 720 607 072 (16 January) JS
PRO TANKLESS
Warning: If the information in this manual is not
followed exactly. A fire or explosion may result
causing property damage, personal injury or death.
Do not store or use gasoline or other flammable
vapor and liquids in the vicinity of this or any other
appliance.
Improper installation, adjustment, alteration,
service or maintenance can cause injury or
property damage. Refer to this manual. For
assistance or additional information consult a
qualified installer, service agency or the gas
supplier.
In the Commonwealth of Massachusetts this
product must be installed by a licensed plumber or
gas fitter.
Upon completion of the installation, these
instructions should be handed to the user of the
appliance for future reference.
What to do if you smell gas
Close gas valve. Open windows.
Do not try to light any appliance
Do not touch any electrical switch; do not use any
phone in your building
If you cannot reach your gas supplier, call the fire
department.
Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions
Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
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Bosch GWH-635-ES-N Specifications

General IconGeneral
BrandBosch
ModelGWH-635-ES-N
CategoryWater Heater
LanguageEnglish

Summary

Appliance Details

Features

Describes the key parts, safety features, materials, and functions of the water heater.

GWH-635-ES Specifications (Technical data)

Provides detailed technical specifications including capacity, output, temperature control, gas requirements, and water connections.

Dimensions and Minimum installation clearances

Details the physical dimensions of the unit and required clearances for safe installation and operation.

General rules to follow for safe operation

Outlines essential safety guidelines and best practices for operating the water heater.

Proper location for installing your heater

Provides guidance on selecting the optimal and safest location for heater installation.

Clearances

Specifies minimum distances required around the appliance for safe installation.

Mounting installation

Instructions and considerations for securely mounting the water heater on a wall.

Combustion air requirements

Explains the necessity and methods for providing adequate combustion air for the appliance.

Venting

Covers essential information and warnings regarding the proper venting of exhaust gases.

Venting options

Details different methods for venting the appliance, including room-sealed and open combustion.

Recommended exhaust vent terminator position

Illustrates and specifies recommended locations for vent terminators based on safety distances.

Supporting the exhaust vent system and the use of an external condensate trap

Guides on supporting vent systems and the correct installation of condensate traps.

Gas piping & connections

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

Gas line sizing

Offers guidance and charts for correctly sizing gas supply lines based on BTU load and pipe type.

Measuring gas pressure

Explains how to measure and verify adequate gas pressure for optimal performance.

High altitude adjustment

Details the procedure for adjusting the appliance for operation at high altitudes.

Water connections

Instructions for connecting the cold and hot water lines to the appliance.

Connecting the pressure relief valve (PRV)

Guides on the proper installation and connection of the pressure relief valve.

Electrical connections

Provides safety warnings and instructions for making electrical connections to the heater.

Operating instructions

Step-by-step guide on how to prepare and start the water heater for operation.

For your safety read before operating your water heater

Crucial safety warnings and instructions to follow before operating the appliance.

Operation instructions

Power

Instructions on how to turn the appliance on and off using the main switch.

Temperature selection

Guides on how to adjust and set the desired hot water temperature output.

Setting the water temperature

Explains how the desired temperature is adjusted and modulated by the electronic control.

New remote control registration

Procedure for pairing and registering a wireless remote control with the appliance.

Operation

Describes the normal operation sequence when a hot water tap is opened.

Reset button

Information on when and how to use the reset button to clear errors or reset the unit.

Program button

Explains the functionality and use of the program button for temperature settings.

Locked condition

Describes the locked condition and how it can be unlocked, typically related to remote control use.

Maintenance and service

To remove front cover

Step-by-step instructions for safely removing the front cover for inspection or service.

Systems and parts that should be checked at least once a year

Lists essential components and systems requiring annual inspection by a qualified technician.

Flushing the heat exchanger

Details the process of flushing the heat exchanger to remove mineral build-up and maintain efficiency.

Troubleshooting

Introduction

Provides an overview of common water-flow related problems affecting heater performance.

Burners do not ignite when hot water is turned on

Lists potential causes and solutions for the burner failing to ignite when hot water is used.

Water is too hot

Explains why the water might be too hot and how to adjust settings or diagnose issues.

Water is not hot enough

Covers reasons for insufficient hot water temperature and potential solutions.

Low water flow;pressure

Discusses issues related to low water flow or pressure affecting heater operation.

Hot water temperature fluctuates; Unit deactivated

Addresses temperature instability and unit deactivation due to water line issues.

Electrical diagram

Electrical scheme

Presents the wiring diagram and identifies key electrical components of the appliance.

GWH-635-ES Functional scheme

Functional scheme

Illustrates the operational logic and flow of the water heater's control system.

Interior components diagram and parts list

Interior components

Provides a visual diagram identifying the main internal parts of the appliance.

Components diagram

A detailed exploded view diagram showing all the individual components of the unit.

Parts list

A comprehensive list of all parts with their descriptions and reference numbers for ordering.

Special adjustment for measuring and adjusting CO2 levels

Adjusting the unit

Instructions for adjusting the CO2 levels for optimal combustion and emissions.

CO2 measuring port

Identifies the port used for inserting a CO2 analyzer to measure exhaust gas levels.

Selecting adjustment mode

Guides on selecting the correct mode (P1/P2) for CO2 adjustment based on gas flow.

Protecting the environment

Saving water resources

Offers tips and methods for conserving water while using the appliance.

Fifteen Year Limited Warranty

General

Outlines the basic terms and conditions of the manufacturer's warranty.

The Heat Exchanger

Specifies the warranty period and conditions for the heat exchanger.

Exceptions

Lists conditions and situations under which the warranty is void or does not apply.

All Other Parts

Details the warranty coverage and replacement terms for parts other than the heat exchanger.

Service Labor Costs

Clarifies that labor costs for service or replacement are not covered by the warranty.

How to Make a Claim

Provides instructions on how to submit a warranty claim and contact customer support.

Miscellaneous

Covers limitations of liability and legal rights related to the warranty.

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