Bosch AquaStar GWH 2700 ES NG User Manual

MODEL GWH 2700 ES NG and GWH 2700 ES LP -
INDOOR MODEL
Temperature Modulated with Electronic Ignition
Suitable for heating potable water only
Not approved for space heating purposes
(Intended for variable flow applications)
GWH 2700 ES NG - Natural Gas
GWH 2700 ES LP - Liquefied Petroleum (LP) Gas
6 720 608 542 US (2007.01) AL
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.

Bosch AquaStar GWH 2700 ES NG Specifications

General

Brand	Bosch
Model	AquaStar GWH 2700 ES NG
Category	Water Heater
Language	English

Summary

Warning

Appliance details

Features

Lists key features of the water heater unit.

GWH 2700 ES Specifications (Technical data)

Provides detailed technical specifications, dimensions, and capacities.

Unpacking the GWH 2700 ES heater

Instructions for unpacking the heater and checking contents.

General rules to follow for safe operation

Essential safety guidelines for operating the appliance.

Dimensions and installation clearances

Details physical size and required clearances for installation.

Installation instructions

Tools required for installation

Lists all necessary tools for the installation process.

Venting

Covers requirements and methods for proper venting of the appliance.

Condensate drain requirements

Details requirements for installing a condensate drain line.

Combustion air requirements

Details requirements for providing adequate combustion air.

Proper location for installing your heater

Guidelines for selecting the optimal installation location.

Gas piping & connections

Procedures for connecting the gas supply line to the unit.

Water connections

Instructions for connecting cold and hot water lines.

Measuring gas pressure

Procedures for measuring and verifying gas pressure.

Electrical connections

Electrical power supply

Requirements for the electrical power supply and grounding.

Position of the fuses in control unit

Steps to locate and check fuses within the control unit.

Operation instructions

LCD Display functions

Explains the meaning of indicators on the LCD display.

For your safety read before operating your water heater

Crucial safety warnings before initial operation.

Temperature selection

Guide on adjusting the desired water temperature.

Use of optional remote control accessory

Information on connecting and using the remote control.

Maintenance and service

Annual maintenance

Schedule and steps for yearly maintenance checks.

Winterizing for seasonal use

Procedures for preparing the unit for freezing temperatures.

Descaling

Instructions for removing mineral scale buildup.

Control board diagnostics

How to access and interpret diagnostic codes.

Troubleshooting

Burner do not ignite when hot water is turned ON

Steps to diagnose and fix burner ignition failures.

Water is too hot

Reasons for excessively hot water and solutions.

Water is not hot enough

Causes and fixes for insufficient hot water temperature.

Low water flow/pressure

Troubleshooting low water flow or pressure issues.

Hot water temperature fluctuates at tap

Addresses issues with inconsistent hot water temperatures.

Problem solving

Error code diagnostics

Explains how to read and clear error codes.

Electrical diagram

Sensor resistance charts

GWH 2700 ES Functional scheme

Interior components diagram and parts list

Interior components

Labeled diagram of internal components.

Components diagram

Exploded view diagrams of component groups.

Protecting the environment

Limited Warranty

General

Overview of the warranty terms and conditions.

The Heat Exchanger

Specific warranty details for the heat exchanger.

Exceptions

Conditions under which the warranty is void.

How to Make a Claim

Instructions on how to submit a warranty claim.