Bosch ProTankless GWH C 800 ES Manuals

• 2

  Table of Contents

3

1 Warning

4

Features

• 5

  Unpacking the GWH C 800 ES Heater
• 6

  General Rules to Follow for Safe Operation
• 7

  Dimensions and Minimum Installation Clearances

4

2 Appliance Details

8

Introduction

• 8

  Proper Location for Installing Your Heater
• 8

  Heater Placement and Clearances

8

Mounting Installation

• 10

  Gas Piping & Connections

8

3 Installation Instructions

• 8

  Tools Required for Installation

12

Water Connections

• 12

  Water Quality

13

Recirculation Application

14

Filling the Condensate Trap

15

Combustion Air Requirements

16

Venting

26

Measuring Gas Pressure

27

4 Electrical Connections

• 27

  Electrical Power Supply
• 27

  Position of the Fuses in Control Unit

28

5 Operation Instructions

• 28

  Description LCD Display
• 29

  For Your Safety Read before Operating Your Water Heater

29

Power

• 29

  Temperature Selection

30

Locked Condition

30

Operation

• 30

  Reset Button
• 30

  Program Button

31

6 Maintenance and Service

• 31

  Annual Maintenance
• 31

  Winterizing for Seasonal Use
• 32

  Mineral Scale Build-Up
• 33

  Condensing Heat Exchanger Unit

33

Adjusting CO2

• 35

  Program Values

36

Control Board Diagnostics

37

Introduction

• 37

  Burner Does Not Ignite When Hot Water Is Turned ON
• 37

  Water Is Too Hot
• 37

  Water Is Not Hot Enough

37

7 Troubleshooting

38

Low Water Flow/Pressure

• 38

  Hot Water Temperature Fluctuates at Tap
• 38

  Noisy Burner/Heater During Operation

40

8 Problem Solving

• 40

  Error Code Diagnostics

45

9 Electrical Diagram

46

10 Sensor Resistance Charts

48

11 GWH C 800 ES Functional Scheme

• 49

  Interior Components Diagram and Parts List

51

Components Diagram

58

13 Protecting the Environment

59

14 Limited Warranty

• 3

  Table of Contents

4

1 Introduction

4

2 Bosch Water Heating Model Certifi Cations

5

3 Bosch Water Heater Accessories

5

4 Water Quality

6

5 Pump Sizing

• 6

  Pressure Drop Curves
• 7

  Domestic Hot Water Circulation
• 7

  Tank Loading

8

6 Bosch Water Heating Models & Specifi Cations

• 8

  Sizing Tankless Water Heaters
• 10

  Outdoor Installation
• 11

  Bosch Gas Tankless Water Heater Specifi Cations
• 12

  Bosch Electric Tankless Water Heater Specifi Cations
• 12

  Ariston Electric Mini-Tank Water Heater Specifi Cations

13

7 Domestic Water Heating Applications

• 13

  Point-Of-Use Applications
• 16

  Whole House Applications

22

8 High Volume Potable Water Heating

• 23

  Cascading Unit Applications
• 25

  Parallel Unit Applications

26

9 Residential Solar Applications

• 26

  Tankloading
• 27

  Booster Applications

29

10 Commercial Solar Applications

30

11 Commercial Water Heating Applications

• 30

  Commercial Kitchen Applications
• 32

  Basic Tank Loading with Domestic Recirculation
• 33

  Advanced Tank Loading Commercial Hot Water System