Table Of Contents; Introduction; Preparing For The Installation - A.O. Smith GDV Instruction Manual

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 confi ned 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
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-fi red water heater is design certifi ed 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
fi rst 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-fi red
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 fi rst few pages, READ THE ENTIRE MANUAL BEFORE

TABLE OF CONTENTS

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

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 fi res, 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 Offi ce 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.
4