Bosch Appliances Water Heater GWH 2400 ES LP User Manual

6 720 608 782

2

2.1

Features 4

2.2

GWH 2400 ES Specifications 
(Technical data) 

4

2.3

Unpacking the GWH 2400 ES heater 

5

2.4

General rules to follow for safe operation 

6

2.5

Dimensions and Minimum installation 
clearances 7

3.1

Tools required for installation 

8

3.2

Introduction 8

3.3

Venting  

8

3.4

Combustion air requirements 

15

3.5

Proper location for installing your heater 

16

3.6

Heater placement and clearances 

16

3.7

Mounting installation 

16

3.8

Gas piping & connections  

17

3.9

Water connections  

20

3.10 Water quality 

20

3.11 Recirculation application 

21

3.12 Measuring gas pressure 

21

4.1

Electrical power supply 

23

4.2

Position of the fuses in control unit 

23

5.1

LCD Display functions 

24

5.2

For your safety read before operating 
your water heater 

25

5.3

Power 25

5.4

Temperature selection 

25

5.5

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

26

5.6

Operation 26

5.7

Reset button 

26

5.8

Program button 

26

5.9

Locked condition 

26

6.1

Annual maintenance 

27

6.2

Winterizing for seasonal use 

27

6.3

Mineral scale build-up 

28

6.4

Adjusting CO2 (carbon dioxide) 

28

6.5

Program values 

31

6.6

Control board diagnostics 

32

6.7

Fan speed adjustment 

33

7.1

Introduction 35

7.2

Burner do not ignite when hot water 
is turned ON 

35

7.3

Water is too hot 

35

7.4

Water is not hot enough 

35

7.5

Low water flow/pressure 

36

7.6

Hot water temperature fluctuates at tap 

36

7.7

Noisy burner/heater during operation 

36

8.1

Error code diagnostics 

38

12.1 Interior components 

46

12.2 Components diagram 

48