A.O. Smith 186589-004 User Manual
RESIDENTIAL GAS WATER HEATERS
DIRECT VENT GAS MODELS GDV/GDVT
NOT FOR USE IN MANUFACTURED (MOBILE) HOMES
A DIVISION OF A. O. SMITH CORPORATION
Ashland City, TN 37015
GAMA certiﬁcation applies to all residential gas water heaters with capacities of 20 to 100 gallons with input rating of 75,000 BTU/Hr. or less.
• For Your Safety•
AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.
ALL TECHNICAL AND WARRANTY QUESTIONS: SHOULD BE DIRECTED TO THE LOCAL DEALER FROM WHOM THE WATER HEATER WAS PURCHASED. IF YOU ARE UNSUCCESSFUL, PLEASE WRITE TO THE COMPANY LISTED ON THE RATING PLATE ON THE WATER HEATER.
KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE
WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.
PRINTED IN CANADA 0608
SAFE INSTALLATION, USE AND SERVICE
Your safety and the safety of others is extremely important in the installation, use and servicing of this water heater.
All safety messages will generally tell you about the type of hazard, what can happen if you do not follow the safety message and how to avoid the risk of injury.
•Qualiﬁed Installer: A qualiﬁed installer must have ability equivalent to a licensed tradesman in the ﬁelds of plumbing, air supply, venting and gas supply, including a thorough understanding of the requirements of the“Natural Gas and Propane Installation Code”
•Service Agency: A service agency also must have ability equivalent to a licensed tradesman in the ﬁelds of plumbing, air supply, venting and gas supply, including a thorough understanding of the requirements of the“Natural Gas and Propane Installation Code”
•Gas Supplier: The Natural Gas or Propane Utility or service who supplies gas for utilization by the gas burning appliances within this application. The gas supplier typically has responsibility for the inspection and code approval of gas piping up to and including the Natural Gas meter or Propane storage tank of a building. Many gas suppliers also offer service and inspection of appliances within the building.
TABLE OF CONTENTS
SAFE INSTALLATION, USE AND SERVICE . . . . . . . . . . . . . 2 GENERAL SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 TABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Preparing for the installation . . . . . . . . . . . . . . . . . . . . . . . 4 TYPICAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vent assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Securing vent termination assembly to the exterior wall . 16 Uncompressing the corrugated tubing. . . . . . . . . . . . . . . 16 Vent restricter plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Offset vent arrangement Condition 1. . . . . . . . . . . . . . . . 17 Offset vent arrangement Condition 2. . . . . . . . . . . . . . . . 17
LIGHTING & OPERATING LABEL . . . . . . . . . . . . . . . . . . . . 18 TEMPERATURE REGULATION . . . . . . . . . . . . . . . . . . . . . . 19 Temperature regulation . . . . . . . . . . . . . . . . . . . . . . . . . . 19 FOR YOUR INFORMATION . . . . . . . . . . . . . . . . . . . . . . .
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:
- Canadian Standards Association
- American National Standards Institute
- National Fire Protection Association
- American Society of Mechanical Engineers
- Gas Appliance Manufacturer’s Association
- Underwriters Laboratories Inc.
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
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 “Natural Gas and Propane Installation Code”
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 installation 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.In Earthquake Zones the water heater must be braced, anchored, or strapped to avoid moving during an earthquake. Contact local utilities for code requirements in your area.
GET TO KNOW YOUR WATER HEATER
TRIM PLATE (OUTSIDE)
TRIM PLATE (INSIDE)
ALL PIPING MATERIALS TO BE
SUPPLIED BY CUSTOMER.
Replacement parts may be ordered through authorized servicers or distributors. When ordering parts, provide complete model and serial numbers (see rating plate), quantity and name of part desired (as listed in Figure 1). Standard hardware items may be purchased locally.
DISCHARGE PIPE (DO NOT CAP OR PLUG)
6” MAXIMUM AIR GAP
INSTALL PER LOCAL CODES.
INSTALL THERMAL EXPANSION TANK IF WATER HEATER IS INSTALLED IN A CLOSED SYSTEM.
GAS PILOT & MAIN BURNER
THERMOCOUPLE PIEZO ELECTRODE
MIXING VALVE USAGE
TEMPERED POTABLE WATER
(*ALSO CALLED MIXING VALVE)
COLD WATER INLET
DISCHARGE PIPE (DO NOT CAP OR PLUG)
CERTAIN MODELS ARE EQUIPPED WITH
SIDE PLUMBING CONNECTIONS FOR
6” MAXIMUM AIR GAP
TO SUITABLE DRAIN
This appliance has been design certiﬁed as complying with American National Standard/CSA Standard for water heaters and is considered suitable for:
Water (Potable) Heating and Space Heating: All models are considered suitable for water (potable) heating and space heating.
HOTTER WATER CAN SCALD:
Water heaters are intended to produce hot water. Water heated to a temperature which will satisfy space heating, clothes washing, dish washing, and other sanitizing needs can scald and permanently injure you upon contact. Some people are more likely to be permanently injured by hot water than others. These include the elderly, children, the inﬁrm, or physically/mentally handicapped. If anyone using hot water in your home ﬁts into one of these groups or if there is a local code or state law requiring a certain temperature water at the hot water tap, then you must take special precautions. In addition to using the lowest possible temperature setting that satisﬁes your hot water needs, a means such as a *mixing valve, should be used at the hot water taps used by these people or at the water heater. Mixing valves are available at plumbing supply or hardware stores. Consult a Qualiﬁed Installer or Service Agency. Follow mixing valve manufacturer’s instructions for installation of the valves. Before changing the factory setting on the thermostat, read the “Temperature Regulation” section in this manual.
LOCATING THE NEW WATER HEATER
FACTS TO CONSIDER ABOUT THE LOCATION
Carefully choose an indoor location for the new water heater, because the placement is a very important consideration for the safety of the occupants in the building and for the most economical use of the appliance. This water heater is not for use in manufactured (mobile) homes or outdoor installation.
Whether replacing an old water heater or putting the water heater in a new location, the following critical points must be observed:
1.Select a location indoors as close as practical to the vent terminal or location to which the water heater vent piping is going to be connected, and as centralized with the water piping system as possible.
2.Selected location must provide adequate clearances for servicing and proper operation of the water heater.
•Sensors mounted in the drain pan that trigger an alarm or turn off the incoming water to the water heater when leakage is detected.
•Sensors mounted in the drain pan that turn off the water supply to the entire home when water is detected in the drain pan.
•Devices that will turn off the gas supply to a gas water heater while at the same time shutting off its water supply.
Also, the water heater must be located and/or protected so it is not subject to physical damage by a moving vehicle.
Installation of the water heater must be accomplished in such a manner that if the tank or any connections should leak, the ﬂow will not cause damage to the structure or any property. For this reason, it is not advisable to install the water heater in an attic or upper ﬂoor. When such locations cannot be avoided, a suitable drain pan should be installed under the water heater. Drain pans are available at your local hardware store. Such a drain pan must have a minimum length and width of at least 51mm (2 in.) greater that the water heater dimensions and must be piped to an adequate drain. The pan must not restrict combustion air ﬂow.
Water heater life depends upon water quality, water pressure and the environment in which the water heater is installed. Water heaters are sometimes installed in locations where leakage may result in property damage, even with the use of a drain pan piped to a drain. The manufacturer assumes no liability for damages resulting from leaks. However, unanticipated damage can be reduced or prevented by a leak detector or water shutoff device used in conjunction with a piped drain pan. These devices, strongly recommended for installations where damage from a leak is possible, are available from some plumbing supply wholesalers and retailers, and detect and react to leakage in various ways:
This water heater must not be installed directly on carpeting. Carpeting must be protected by metal or wood panel beneath the appliance extending beyond the full width and depth of the appliance by at least 76mm (3 in.) in any direction, or if the appliance is installed in an alcove or closet, the entire ﬂoor must be covered by the panel. Failure to heed this warning may result in a ﬁre hazard.
Insulation blankets available to the general public for external use on gas water heaters are not necessary with this product. The purpose of an insulation blanket is to reduce the standby heat loss encountered with storage tank water heaters. Your Water heater meets or exceeds the National Appliance Energy Conservation Act standards with respect to insulation and standby loss requirements, making an insulation blanket unnecessary.
Should you choose to apply an insulation blanket to this heater, you should follow these instructions (See Figure 1 for identiﬁcation of components mentioned below). Failure to follow these instructions can restrict the air ﬂow required for proper combustion, resulting in ﬁre, asphyxiation, serious personal injury or death.
•Do not cover the outer door, thermostat or temperature & pressure relief valve.
•Do not cover the instruction manual. Keep it on the side of the water heater or nearby for future reference.
VENTILATION FOR APPLIANCES LOCATED IN CONFINED SPACES
Conﬁned Space is a space whose volume is less than 50 cubic feet per 1,000 Btu per hour (4.8 cm per kW) of the aggregate input rating of all appliances installed in that space.
Before installing water heater determine placement of vent termination.
Make certain to observe vent location limitation, see Figures 3, 4 & 12.
Minimum clearances between the water heater and combustible and noncombustible construction are: 0mm (0 in.) from sides, 0mm (0 in.) from back, 102mm (4 in.) from front of jacket to closet door and 508mm (20 in.) from top of jacket to combustible and noncombustible material. Minimum vent clearance: 25mm (1 in.)*. Provide 915mm (3 ft.) front clearance for servicing and adequate clearance between the jacket top & ceiling for servicing the ﬂue area, see Figure 4.
* Where the wall is combustible and the wall thickness is over 356mm (14 in.), 25mm (1 in.) clearance to combustible materials around the vent terminal is needed. The ﬁrst 356mm (14 in.) is zero clearance.
Make certain the vent locations comply with the “Natural Gas and Propane Installation Code”
For a second or more direct vent unit, the distance between vent terminals must be a minimum of 305mm (12 in.).
INSTALLING THE NEW WATER HEATER
INSTALLATION OR SERVICE OF THIS WATER HEATER REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED TRADESMAN IN THE FIELD INVOLVED. PLUMBING, AIR SUPPLY, VENTING AND GAS SUPPLY ARE REQUIRED.
There may be hidden damage caused in transit. Check to be certain all parts of the venting system, as listed below, are present. CAUTION!!! IF THERE ARE ANY DAMAGED
PARTS, DO NOT INSTALL THIS WATER HEATER. REPORT ANY SHORTAGE TO YOUR DISTRIBUTOR OR DAMAGE TO YOUR CARRIER.
The installation must conform to these instructions and the local code authority having jurisdiction. In the absence of local codes, the installation must comply with the current editions of the “Natural Gas and Propane Installation Code”
HOTTER WATER CAN SCALD:
Water heaters are intended to produce hot water. Water heated to a temperature which will satisfy space heating, clothes washing, dish washing, cleaning and other sanitizing needs can scald and permanently injure you upon contact. Some people are more likely to be permanently injured by hot water than others. These include the elderly, children, the inﬁrm, or physically/mentally handicapped. If anyone using hot water in your home ﬁts into one of these groups or if there is a local code or state law requiring a certain temperature water at the hot water tap, then you must take special precautions. In addition to using the lowest possible temperature setting that satisﬁes your hot water needs, a means such as a *mixing valve, should be used at the hot water taps used by these people or at the water heater, see Figure 2. Valves for reducing point of use temperature by mixing cold and hot water are also available:
Consult a Qualiﬁed Installer or Service Agency. Follow manufacturer’s instructions for installation of the valves. Before changing the factory setting on the thermostat, read the “Temperature Regulation” section in this manual.
This water heater shall not be connected to any heating systems or component(s) used with a
All piping components connected to this unit for space heating applications shall be suitable for use with potable water.
Toxic chemicals, such as those used for boiler treatment shall not be introduced into this system.
When the system requires water for space heating at temperatures higher than required for domestic water purposes, a *mixing valve must be installed. Please refer to Figure 2 for suggested piping arrangement.
Water supply systems may, because of such events as high line pressure, frequent
The water within the water heater tank expands as it is heated and increases the pressure of the water system. If the relieving point of the water heater’s
It is recommended that any devices installed which could create a closed system have a
NOTE: To protect against untimely corrosion of hot and cold water ﬁttings, it is strongly recommended that
All gas piping must comply with local codes and ordinances or with the “Natural Gas and Propane Installation Code” CAN/
3/4” SWEAT FITTING
3/4” SWEAT FITTING
TEMPERATURE AND PRESSURE RELIEF VALVE
DISCHARGE PIPE (DO NOT CAP OR PLUG)
6” MAXIMUM AIR GAP
Figure 5 shows the typical attachment of the water piping to the water heater. The water heater is equipped with 3/4“ NPT water connections.
NOTE: If using copper tubing, solder tubing to an adapter before attaching the adapter to the cold water inlet connection. Do not solder the cold water supply line directly to the cold water inlet. It will harm the dip tube and damage the tank.
T & P VALVE AND PIPE INSULATION (IF SUPPLIED)
Remove insulation for T & P valve and pipe connections from carton.
Fit pipe insulation over the incoming cold water line and the hot water line. Make sure that the insulation is against the top cover of the heater.
Fit T & P valve insulation over valve. Make sure that the insulation does not interfere with the lever of the T & P valve.
Secure all insulation using tape.
This heater is provided with a properly certiﬁed combination temperature - pressure relief valve by the manufacturer.
The valve is certiﬁed by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment of materials as meeting the requirements for Relief Valves for Hot Water Supply Systems, ANSI Z21.22 • CSA 4.4, and the code requirements of ASME.
If replaced, the valve must meet the requirements of local codes, but not less than a combination temperature and pressure relief valve certiﬁed as indicated in the above paragraph.
The valve must be marked with a maximum set pressure not to exceed the marked hydrostatic working pressure of the water heater (150 psi = 1,035 kPa) and a discharge capacity not less than the water heater input rate as shown on the model rating plate.
For safe operation of the water heater, the relief valve must not be removed from its designated opening nor plugged.