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Bosch GWH 2700 ES LP User Manual

Bosch GWH 2700 ES LP
60 pages
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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 (2009/03) US
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 2700 ES LP Specifications

General IconGeneral
TypeTankless
Fuel TypeLiquid Propane
Flow Rate6.6 GPM
Ignition TypeElectronic
Energy Factor0.82
VentingDirect Vent
Warranty5 years parts

Summary

Warning

For your safety

Critical safety guidelines and warnings for installation and operation.

What to do if you smell gas

Emergency procedures to follow in case of a gas leak.

Appliance details

2.1 Features

Lists key features and components of the appliance.

DANGER: Hot water warning

Warning about severe burns or death from water temperatures over 125°F.

2.2 Specifications (Technical data)

Provides detailed technical specifications including dimensions, capacity, gas, electrical, and safety devices.

2.3 Unpacking the heater

Instructions on how to unpack the heater and identify its components and parts.

2.4 General rules to follow for safe operation

Outlines essential rules for the safe installation and operation of the water heater.

2.5 Dimensions and Minimum installation clearances

Details the physical dimensions and required clearances for heater installation.

Installation instructions

3.1 Tools required for installation

Lists the necessary tools for installing the water heater.

3.2 Introduction

Introduces the importance of following installation instructions.

3.3 Venting

Covers requirements and guidelines for venting the appliance.

3.3.1 Vent material

Specifies the approved materials for vent piping.

3.3.2 Venting Specifications

Details the specifications and requirements for proper venting configuration.

Required direct vent terminal clearances (twin pipe / concentric penetration)

Specifies required clearances for direct vent terminal installations.

Required other than direct vent terminal clearances (single pipe penetration)

Specifies required clearances for single pipe vent terminal installations.

3.3.3 Venting configuration examples

Provides examples of approved horizontal and vertical venting installations.

3.3.4 Vent connections

Instructions for connecting flue gas exhaust and combustion air inlet accessories.

3.3.5 Condensate drain installation

Details the installation process for the condensate drain system.

3.3.6 Fan speed adjustment

Instructions for adjusting fan speed based on vent length and altitude.

Attention residents of the Commonwealth of Massachusetts

Outlines specific installation requirements for Massachusetts residents.

3.4 Combustion air requirements

Specifies the requirements for providing adequate combustion air.

3.5 Proper location for installing your heater

Guidance on selecting the optimal location for the water heater installation.

3.6 Heater placement and clearances

Details placement considerations and required clearances for the heater.

3.7 Mounting installation

Instructions for securely mounting the water heater to the wall.

3.8 Gas piping & connections

Covers the procedures for connecting the gas supply to the appliance.

GAS LINE SIZING

Guidelines for correctly sizing the gas supply piping based on BTU input.

FOR NATURAL GAS

Tables for calculating natural gas pipe capacity based on length and diameter.

FOR LP GAS

Tables for calculating LP gas pipe capacity based on length and diameter.

3.9 Water connections

Instructions for making the hot and cold water connections to the heater.

3.10 Water quality

Discusses the impact of water quality and recommended levels.

3.11 Domestic hot water recirculation

Details how to set up a domestic hot water recirculation system.

3.12 Measuring gas pressure

Procedure for measuring and verifying gas pressure for proper operation.

Electrical connections

4.1 Electrical power supply

Covers the requirements for connecting the appliance to the electrical power supply.

4.2 Position of the fuses in control unit

Guides on locating and checking the fuses within the control unit.

Operation instructions

5.1 LCD Display functions

Explains the various indicators and symbols displayed on the LCD screen.

5.2 For your safety read before operating your water heater

Critical safety information to review before operating the water heater.

5.3 Power

Instructions on how to turn the water heater on and off.

5.4 Temperature selection

Details how to adjust the output water temperature using the control panel.

5.5 Use of optional remote control accessory (part no. TSTAT2)

Information on using the optional wireless remote control accessory.

5.6 Operation

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

5.7 Reset button

How to use the reset button to clear error codes and restore normal operation.

5.8 Program button

Instructions for programming and memorizing desired temperatures.

5.9 Locked condition

Describes the locked condition and how it is resolved.

Maintenance and service

6.1 Annual maintenance

Provides a checklist for annual maintenance tasks for the unit.

6.2 Winterizing for seasonal use

Instructions for preparing the water heater for seasonal storage to prevent freezing.

6.3 Mineral scale build-up

Discusses scale buildup issues and how to descale the heat exchanger.

Descaling using a pump

Step-by-step guide for descaling the heat exchanger using a pump.

6.4 Adjusting CO2 (carbon dioxide)

Procedures for adjusting CO2 levels for optimal combustion.

6.5 Program values

Details various programmable settings and their default values.

6.6 Control board diagnostics

Guide to accessing and interpreting diagnostic codes from the control board.

Troubleshooting

7.1 Introduction

Introduction to troubleshooting steps and resources.

7.2 Burner do not ignite when hot water is turned ON

Steps to diagnose and resolve issues where the burner fails to ignite.

7.3 Water is too hot

Troubleshooting guide for when the water temperature is excessively high.

7.4 Water is not hot enough

Steps to diagnose and resolve issues where the water temperature is insufficient.

7.5 Low water flow/pressure

Troubleshooting steps for low water flow or pressure issues.

7.6 Hot water temperature fluctuates at tap

Guidance on resolving fluctuations in hot water temperature at the tap.

7.7 Noisy burner/heater during operation

Identifies causes and solutions for noise from the burner or heater.

Problem solving

8.1 Error code diagnostics

Explains how to interpret and clear error codes displayed on the unit.

Electrical diagram

Sensor resistance charts

Outlet temperature sensor characteristics

Chart showing resistance values for the outlet temperature sensor at different temperatures.

Inlet temperature sensor characteristics

Chart showing resistance values for the inlet temperature sensor at different temperatures.

Back Flow characteristics

Chart showing resistance values for the backflow temperature sensor.

GWH 2700 ES Functional scheme

Water flow procedure

Details the operational logic for water flow calculation and burner control.

Interior components diagram and parts list

12.1 Interior components

Provides a labeled diagram of the internal components of the water heater.

12.2 Components diagram

Detailed component breakdown diagrams (Groups 1-6) with part references.

Protecting the environment

Limited Warranty

General

Outlines general terms and conditions of the water heater warranty.

Service Labor Costs

Clarifies that labor costs are not covered by the warranty.

How to Make a Claim

Instructions on how to initiate a warranty claim for parts.

Miscellaneous

Contains important disclaimers and limitations of the warranty.

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