Bosch 715ES Reference manual

Models: 715ES, 2400ES, 2700ES

Replacing the Attenuator

Service Bulletin G3-29

Introduction

Bosch Thermotechnology recommends the following water

heater adjustments to accomodate installations with a broader

range of operating conditions and to improve operation with

varying characteristics of LP gas combustion.

Tools needed:

Phillips head screwdriver

Preparation

1. Unplug the water heater power supply cord.

2. Loosen two Phillips head screws located at bottom rear of cover.

(Fig. 1, step 1, pos. 1).

3. Lift front cover upward and remove. (Fig. 1, step 1, pos. 2 & 3)

4. Remove secondary combustion cover by unclipping two upper

and two lower clips securing cover. (Fig. 1, step 2)

Step 1 Step 2

tep

Figure 1

Removing the attenuator

1. Locate attenuator. (Fig. 2, pos. 1).

2. Remove three Phillips head screws from attenuator.

(Fig. 2, pos. 2)

Figure 2

3. Pull attenuator free from heater. Discard the black o-ring

positioned between the fan assembly and attenuator.

(Fig. 3, pos 1.)

Data subject to change without notice | Printed in the USA | 02.2008 Bosch Thermotechnology Corp.

Service bulletin

18 | G3-29 | 715ES, 2400ES, 2700ES

Bosch Thermotechnology Corp.

50 Wentworth Avenue

Londonderry, NH 03053

Tel: 1-866-642-3198

Fax: 1-603-584-1681

www.boschpro.com

Fan

Attenuator

Fan

ttenuato

Figure 3

o-ring

(to be discarded)

Replacing the attenuator

1. Install replacement attenuator to the fan without o-ring.

(Fig. 3, pos. 1).

2. Secure the attenuator to the fan assembly with three Phillips

head screws. (Fig. 2, pos.2).

Adjusting fan speed (LP models only)

Note: Upon replacing the attenuator, if the water heater is a liquid

propane model, the fan speed should be adjusted using the

following the procedure.

1. Plug in power supply cord.

2. Press and hold the program ( ) button while pressing the On/

Off button to the On position. (Fig. 4)

Figure 4

3. Release the program ( ) button when '188' appears on the

display. The display should read 'P2'. If not, repeat process.

(Fig. 4)

4. Press the ( ) button on the control panel until the display reads

'P1'.

5. Press the program ( ) button once and the display should show

the numeric value of the fan speed.

6. Use the ( ) and ( ) buttons on the control unit to select the

new fan speed for your model. The P1 fan speeds should be set

to the following:

Model GWH 2400 ES: P1 fan speed = 37

Models GWH 715 ES and GWH 2700 ES: P1 fan speed = 42

7. Press and hold (± 5 sec.) the program ( ) button until the

display flashes. The selected value is now memorized.

8. Press On/Off button on water heater to Off position. Press On/

Off button again to turn water heater back on.

9. Replace combustion cover only.

Adjusting CO₂

1. The water heater requires a CO₂ adjustment after the installation

of the replacement attenuator. Refer to Service Bulletin G3-12

for detailed instructions on this process.

2. After adjusting CO₂, replace front cover.

3. Press On/Off button on water heater to Off position. Press On/

Off button again to return water heater to normal service.

Other manuals for 715ES

This manual suits for next models

Other Bosch Water Heater manuals

Bosch

Bosch AquaStar GWH 2700 ES NG User manual

Bosch

Bosch TR8500 15/18 DESOB User manual

Bosch

Bosch 125B LP User manual

Bosch

Bosch AQUA STAR 250SX LP User manual

Bosch

Bosch Aquastar GWH 1600 H N User manual

Bosch

Bosch BH 120-5 Instruction Manual

Bosch

Bosch TR7000 Series User manual

Bosch

Bosch Tronic 3000T ES 2.5 Technical Document

Bosch

Bosch Therm 6000 S User manual

Bosch

Bosch GWH 260 PN Reference manual

Bosch

Bosch Greentherm T9800 SEC 160/199 Instructions for use

Bosch

Bosch TR8500 15/18 DESOAB User manual

Bosch

Bosch Exxcel 1400 User guide

Bosch

Bosch Stora SWDP 200-2 Quick guide

Bosch

Bosch AQUA STAR 2400E LP User manual

Bosch

Bosch Optiflow Professional GWH12 User manual

Bosch

Bosch BC2600RA User manual

Bosch

Bosch T5600S 12 D 23 Operating and installation instructions

Bosch

Bosch TR8500 Series User manual

Bosch

Bosch RDE 1821415 User manual

Bosch

Bosch BC2680RA User manual

Bosch

Bosch BSS250E-2 User manual

Bosch

Bosch Aquastar 2400 ES User manual

Bosch

Bosch T2400S 8 ND 23 Operating and installation instructions

Popular Water Heater manuals by other brands

Kenmore

Kenmore 153.582400 Use & care guide

Applimo

Applimo Edel AIR Installation and operating instructions

STIEBEL ELTRON

STIEBEL ELTRON Eltronom SHU 5 S Operating and installation instructions

clage

clage E-Mini Series Operating and installation instructions

Toyotomi

Toyotomi Oil Miser OM-180 installation manual

Bradford White

Bradford White EF Series Service manual

Eccotemp

Eccotemp 40-H Use & care manual

Dimplex

Dimplex ECSd125-580 Installation and user instructions

Dux

Dux 32FCR6N installation manual

Toyotomi

Toyotomi Oil Miser OM-148 (Type D) Operation and maintenance instructions

Noritz

Noritz N-132M Owner's guide and installation manual

TESY

TESY GCV7/4S 10047 Instructions for use and maintenance

A.O. Smith

A.O. Smith Gphe 50 instruction manual

Koryo

Koryo KWHZF15Y user manual

Pentair

Pentair PSC-14-4-02 Installation and operation manual

GE 40M06AAG Energy guide

Thermor

Thermor AEROMAX SPLIT 2 Instructions for use

American Hometec

American Hometec AHQ-B03X Installation and operation manual