Table of Contents, Introduction | A.O. Smith GDVT guide

SAFE INSTALLATION, USE AND SERVICE . . . . . . . . . . . . . 2 GENERAL SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 TABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Preparing for the installation . . . . . . . . . . . . . . . . . . . . . . . 4

INSTALLATION REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS . . . . . . . . . . . . . 5 TYPICAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Get to know your water heater . . . . . . . . . . . . . . . . . . . . . 6 Replacement parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Mixing valve useage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 LOCATING THE NEW WATER HEATER . . . . . . . . . . . . . . . . 8 Facts to consider about location . . . . . . . . . . . . . . . . . . . . 8 Insulation blankets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Ventilation for appliances located in conﬁned spaces . . . . 9 Vent termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 INSTALLING THE NEW WATER HEATER . . . . . . . . . . . . 10-18 Required ability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Inspect shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Water piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 T & P valve and pipe insulation (if supplied) . . . . . . . . . . .11 Temperature-pressure relief valve . . . . . . . . . . . . . . . . . . .11 Water (potable) heating and space heating. . . . . . . . . . . 12 Closed water system . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Gas piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Sediment traps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Filling the water heater . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 High altitude installations . . . . . . . . . . . . . . . . . . . . . . . . . 14 Combustion air and ventilation . . . . . . . . . . . . . . . . . . . . 15 Vent terminal clearances . . . . . . . . . . . . . . . . . . . . . . . . . 15 Vent connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Locating clearance hole for vent . . . . . . . . . . . . . . . . . . . 16

High rise vent arrangement . . . . . . . . . . . . . . . . . . . . . . . 16 Standard vent arrangement . . . . . . . . . . . . . . . . . . . . . . . 17 Securing vent termination assembly to the exterior wall . 17 Uncompressing the corrugated tubing. . . . . . . . . . . . . . . 17 Vent restricter plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Offset vent arrangement Condition 1. . . . . . . . . . . . . . . . 18 Offset vent arrangement Condition 2. . . . . . . . . . . . . . . . 18

LIGHTING & OPERATING LABEL . . . . . . . . . . . . . . . . . . . . 19 TEMPERATURE REGULATION . . . . . . . . . . . . . . . . . . . . . . 20 Temperature regulation . . . . . . . . . . . . . . . . . . . . . . . . . . 20 FOR YOUR INFORMATION . . . . . . . . . . . . . . . . . . . . . . . 21-22 External damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Start up conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Condensate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Smoke/odor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Thermal expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Strange sounds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Operational Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Smelly water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 “Air” in hot water systems . . . . . . . . . . . . . . . . . . . . . . . . 22 High water temperature shut off system . . . . . . . . . . . . . 22 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-25 Venting system inspection . . . . . . . . . . . . . . . . . . . . . . . . 23 Pilot and main burner. . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Temperature & pressure relief valve . . . . . . . . . . . . . . . . 24 Draining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Cathodic protection - anode. . . . . . . . . . . . . . . . . . . . . . . 24 Anode rod maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . 24 Drain valve washer replacement . . . . . . . . . . . . . . . . . . . 25 LEAKAGE CHECKPOINTS. . . . . . . . . . . . . . . . . . . . . . . . . . 26 Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 TROUBLESHOOTING GUIDELINES . . . . . . . . . . . . . . . . 27-28 NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-31

INTRODUCTION

Thank You for purchasing this water heater. Properly installed and maintained, it should give you years of trouble free service.

Abbreviations Found In This Instruction Manual:

•	CSA	- Canadian Standards Association
•	ANSI	- American National Standards Institute
•	NFPA	- National Fire Protection Association
•	ASME	- American Society of Mechanical Engineers
•	GAMA	- Gas Appliance Manufacturer’s Association
•	UL	- Underwriters Laboratories Inc.

This gas-ﬁred water heater is design certiﬁed by Underwriters Laboratories Inc. under American National Standard/CSA Stan- dard for Gas Water Heaters ANSI Z21.10.1 • CSA 4.1 (current edition).

PREPARING FOR THE INSTALLATION

1.Read the “General Safety” section, page 3 of this manual ﬁrst and then the entire manual carefully. If you don’t follow the safety rules, the water heater will not operate properly. It could cause DEATH, SERIOUS BODILY INJURY AND/OR PROPERTY DAMAGE. This manual contains instructions for the installation, operation, and maintenance of the gas-ﬁred water heater. It also contains warnings throughout the man- ual that you must read and be aware of. All warnings and all instructions are essential to the proper operation of the water heater and your safety. Since we cannot put everything on the ﬁrst few pages, READ THE ENTIRE MANUAL BEFORE

ATTEMPTING TO INSTALL OR OPERATE THE WATER HEATER.

2.The installation must conform with these instructions and the local code authority having jurisdiction. In the absence of local codes, installations shall comply with the National Fuel Gas Code ANSI Z223.1/NFPA. This publication is available from the Canadian Standards Association, 8501 East Pleas- ant Valley Road, Cleveland, OH 44131.

3.If after reading this manual you have any questions or do not understand any portion of the instructions, call the local gas utility or the manufacturer whose name appears on the rating plate.

4.Carefully plan the place where you are going to put the water heater. Correct combustion, vent action, and vent pipe instal- lation are very important in preventing death from possible carbon monoxide poisoning and ﬁres, see Figures 1 and 2. Examine the location to ensure the water heater complies with the “Locating the New Water Heater” section in this manual.

5.For California installation this water heater must be braced, anchored, or strapped to avoid falling or moving during an earthquake. See instructions for correct installation proce- dures. Instructions may be obtained from California Ofﬁce of the State Architect, 400 P Street, Sacramento, CA 95814.

6.Massachusetts Code requires this water heater to be in- stalled in accordance with Massachusetts 248-CMR 2.00: State Plumbing Code and 248-CMR 5.00. For more informa- tion see next page.