table of contents

table of contents

safe installation, use and service

3

APPROVALS

3

general safety information

4

Precautions

4

Grounding Instructions

4

Hydrogen Gas Flammable

4

introduction

7

Abbreviations Used

7

Qualifications

7

Preparing For The Installation

7

features and components

8

Get To Know Your Water Heater - Gas Models

8

installation consideration

9

Rough In Dimensions

9

Locating The Water Heater

10

Insulation Blankets

11

Combustion Air and Ventilation

11

Unconfined Space

11

Confined Space

12

Fresh Air Openings For Confined Spaces

12

Outdoor Air Through Two Openings

12

Outdoor Air Through One Opening

12

Outdoor Air Through Two Horizontal Ducts

13

Air From Other Indoor Spaces

13

Chemical Vapor Corrosion

14

Water Piping

14

Power Supply

14

installing the new water heater

14

Mixing Valves

15

Dishwashing Machines

15

Space Heating and Potable Water System

15

Closed Water Systems

16

Thermal Expansion

16

Temperature-Pressure Relief Valve

17

Gas Piping

18

Supply Gas Regulator

18

Condensate Piping

18

High Altitude Installations

19

Filling the Water Heater

19

Venting

20

Installation Requirements - Commonwealth of

Massachusetts

22

Commonwealth of Massachusetts

22

Installation of Carbon Monoxide Detectors

22

Approved Carbon Monoxide Detectors

22

Signage

22

Exemptions

22

Manufacturer Requirements - Gas Equipment Venting System

Provided

22

Manufacturer Requirements - Gas Equipment Venting System

Not Provided

22

Termination Clearances Sidewall Power Vent

23

Termination Clearances Sidewall Direct Vent

24

Installation Sequence

25

direct vent diagram

30

Vent Pipe Preparation

31

Controls and Switches

33

Power Vent Wiring Schematic - Figure 34

34

temperature regulation

36

control system operation

37

Overview

37

Control System Navigation

37

User Settings & Control System Menus

40

for your information

45

Start Up Conditions

45

Operational Conditions

45

periodic maintenance

46

Venting System Inspection

46

Anode Rod Inspection

46

Temperature-Pressure Relief Valve Operation

46

Draining and Flushing

47

Service

47

maintenance

48

Temperature-Pressure Relief Valve Test

48

leakage checkpoints

49

troubleshooting

50

Installation Checklist

50

Installation Checklist

50

Sequence Of Operation Flow Chart

51

Operational Problems

52

Fault and Alert Conditions

52

notes

56

LIMITED RESIDENTIAL GAS WARRANTY

59

2

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American Water Heater VG6250T100 instruction manual table of contents