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Instruction Manual
RESIDENTIAL GAS WATER HEATERS
POWER DIRECT VENTED GAS MODELS
NOT FOR USE IN MANUFACTURED (MOBILE) HOMES
LOW LEAD
CONTENT
•
•
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 0312
185884-003
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Table of Contents
Related Manuals for A.O. Smith GPD-40
Summary of Contents for A.O. Smith GPD-40
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Page 1: Instruction Manual
Instruction Manual RESIDENTIAL GAS WATER HEATERS POWER DIRECT VENTED GAS MODELS NOT FOR USE IN MANUFACTURED (MOBILE) HOMES LOW LEAD CONTENT • • 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. -
Page 2: Safe Installation, Use And Service
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. Many safety-related messages and instructions have been provided in this manual and on your own water heater to warn you and others of a potential hazard. -
Page 4: Table Of Contents
TABLE OF CONTENTS SAFE INSTALLATION, USE AND SERVICE........2 Cutting Openings Through an Outside Wall and Collar Installation ............19 GENERAL SAFETY..............2-3 Installation Showing Use of PVC, ABS or CPVC Pipe TABLE OF CONTENTS ..............4 for Inlet and Outlet Vent Piping ..........19 INTRODUCTION ................ -
Page 5: Installation Requirements For The Commonwealth Of Massachusetts
INSTALLATION REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS For all side wall terminated, horizontally vented power vent, direct vent, and power direct vent gas fueled water heaters installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above fi... -
Page 6: Typical Installation
TYPICAL INSTALLATION GET TO KNOW YOUR WATER HEATER - GAS MODELS A Vent Pipe–Exhaust J Inlet Dip Tube Manual Gas Shut-off Valve B Vent Terminal–Exhaust K Anode** Ground Joint Union C Intake or Combustion Air Pipe L Hot Water Outlet Sediment Trap (Dirt Leg) D Intake or Combustion Air Terminal M Outlet Receptacle (115 VAC) -
Page 7: Mixing Valve Usage
MIXING VALVE USAGE SUGGESTED PIPING ARRANGEMENT FOR TOP CONNECTIONS FIGURE 2. This appliance has been design certifi ed as complying with American HOTTER WATER CAN SCALD: National Standard/CSA Standard for water heaters and is considered suitable for: Water heaters are intended to produce hot water. Water heated to a Water (Potable) Heating and Space Heating: All models are temperature which will satisfy space heating, clothes washing, dish considered suitable for combination water (potable) heating and... -
Page 8: Locating The New Water Heater
LOCATING THE NEW WATER HEATER FACTS TO CONSIDER ABOUT THE LOCATION water heater’s hot surface igniter or main burner. The resulting fl ashback and fi re can cause death, serious burns to anyone in the area or property damage. This water heater is equipped with an FV sensor for detecting Carefully choose an indoor location for the new water heater, because the presence of fl... -
Page 9: Combustion Air And Exhaust Termination Clearances
FIGURE 5. Minimum clearances between the water heater and combustible If this water heater will be used in beauty shops, barber shops, construction are 0 inch at the sides and rear, 6” (15.2 cm) from the cleaning establishments, or self-service laundries with dry cleaning front of the jacket, and 12”... -
Page 10: Wire Fence
VENT TERMINATION CLEARANCES ..FIGURE 7. WIRE FENCE • The vent exhaust outlet and air inlet terminals shall terminate at least 18" (45.7 cm) above the roof surface, see Figure 9. When the water heater outlet terminal is low enough to be touched accidentally, or is accessible to small children, a wire mesh chain link fence (as shown in Figure 8) may be used. -
Page 11: Insulation Blankets
Should you choose to apply an insulation blanket to this heater, you • Do not apply insulation to the top of the water heater, as this will should follow these instructions. (For identifi cation of the components interfere with safe operation of the water heater. mentioned in the next column, see Figure 1.) Failure to follow these instructions can restrict the air fl... -
Page 12: Installing The New Water Heater
INSTALLING THE NEW WATER HEATER WATER PIPING THERMAL EXPANSION As water is heated, it expands (thermal expansion). In a closed system the volume of water will grow. As the volume of water grows there will be a corresponding increase in water pressure due to thermal expansion. -
Page 13: Temperature-Pressure Relief Valve
solder the cold water supply line directly to the cold water inlet. If replaced, the valve must meet the requirements of local codes, but It will harm the dip tube and damage the tank. not less than a combination temperature and pressure relief valve certifi... -
Page 14: Gas Piping
line, and (2) the water manually discharged will not cause any bodily injury or property damage because the water may be extremely hot. If after manually operating the valve, it fails to completely reset and continues to release water, immediately close the cold water inlet to the water heater, follow the draining instructions, and replace the temperature-pressure relief valve with a new one. -
Page 15: Sediment Traps
FIGURE 12. GAS PIPING WITH FLEXIBLE CONNECTOR. FIGURE 14. FIGURE 13. GAS PIPING WITH ALL BLACK IRON PIPE TO GAS CONTROL. FILLING THE WATER HEATER SEDIMENT TRAPS Never use this water heater unless it is completely full of water. To prevent damage to the tank, the tank must be fi... - Page 16 WIRING SCHEMATIC DIAGRAM 1. to the connector on the bottom side of the gas control valve/ or outlet providing power to this water heater must be wired thermostat. properly (correct polarity). 6. If the wiring harness is not factory installed, make sure the ON/ 8.
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Page 17: Vent Connections To Blower Assembly
VENT CONNECTIONS TO BLOWER ASSEMBLY Figure 15 shows the typical vent connections. FIGURE 16. Horizontal runs must be securely supported at 3 1/2 foot (1 m) intervals and vertical runs supported at 5 foot (1.5 m) intervals. FIGURE 15. VENTING AND INSTALLATION Plan the layout of the vent system from the vent termination to the water heater considering all of the 90°... -
Page 18: Venting Through An Outside Wall
VENTING SYSTEM EXAMPLE INSTALLATIONS FOR 4. The unit cannot be connected to existing vent piping or chimney. ALL MODELS 5. When venting through an outside wall, the vents must terminate horizontally to the outdoors. Do not run the vent piping downward under any circumstances. B. -
Page 19: Vent Pipe Separation
FIGURE 23B. 3. Minimum vent length for all models is 18 inches (46 cm). VENT PIPE SEPARATION FIGURE 25. The inlet and outlet vent pipes must be separated by a minimum The 3” PVC, ABS, or CPVC Schedule 40 vent pipe can be run distance of 6 1/2 inches (16.5 cm) up to 24 inches (61 cm) from the water heater through the wall or from the wall to the water maximum. -
Page 20: Connecting Vent To Blower
CONNECTING VENT TO BLOWER VENTING THROUGH A ROOF Two 3” inlet and outlet PVC Schedule 40 - 45° vent caps are supplied. 1. If making an immediate horizontal run of vent off the blower, install the following at the blower inlet: one 3" PVC Schedule 40 pipe A 5’... -
Page 21: Vent Pipe Preparation
PRIMER FIGURE 30. It is recommended that Tetrahydrofuran (THF) be used to prepare the surfaces of pipe and fi ttings for solvent welding. Do not use water, rags, gasoline or any other substitutes for cleaning PVC, ABS or VENT PIPE PREPARATION CPVC surfaces. - Page 22 3. MAKING THE JOINT Apply primer to the surface of the pipe and fi tting socket with a A. Cutting natural bristle brush. This process softens and prepares the PVC, Pipe must be squarely cut to allow for the proper interfacing of the ABS or CPVC for the solvent cementing step.
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Page 24: Temperature Regulation
TEMPERATURE REGULATION Due to the nature of the typical gas water heater, the water To avoid any unintentional changes in water temperature settings, temperature in certain situations may vary up to 30°F (16.7°C) the gas control valve/thermostat has a tamper resistant feature higher or lower at the point of use such as, bathtubs, showers, for changing the temperature setting. -
Page 25: For Your Information
FOR YOUR INFORMATION START UP CONDITIONS to thermal expansion. Thermal expansion can cause premature tank failure (leakage). This type of failure is not covered under the limited warranty. Thermal expansion can also cause intermittent CONDENSATE temperature-pressure relief valve operation: water discharged from Whenever the water heater is filled with cold water, some the valve due to excessive pressure build up. -
Page 26: Periodic Maintenance
PERIODIC MAINTENANCE VENTING SYSTEM INSPECTION characteristics and ignition sequences. This can be done by viewing the main burner operation through the Viewport on the Outer Door, see Figure 1. The main burner should provide complete combustion of gas, ignite rapidly, give reasonably quiet operation, and cause no excessive fl... -
Page 27: Anode Rod
ANODE ROD In replacing the anode: 1. Turn off gas supply to the water heater. 2. Shut off the water supply and open a nearby hot water faucet to depressurize the water tank. 3. Drain approximately 5 gallons (18.9 L) of water from the tank (Refer to the "Draining and Flushing"... -
Page 28: Draining And Flushing
DRAIN VALVE WASHER REPLACEMENT You may have a check valve installed in the water line or a water meter with a check valve. Consult your local water supplier or service agency for further information. Do not plug the temperature-pressure (See Figure 34) relief valve. -
Page 29: Leakage Checkpoints
LEAKAGE CHECKPOINTS Read this manual fi rst. Then before checking the water heater make sure the gas supply has been turned “OFF”, and never turn the gas “ON” before the tank is completely full of water. Never use this water heater unless it is completely fi lled with water. -
Page 30: Repair Parts List
REPAIR PARTS LIST Key No. Part Description Vent Cap w/Screen Adaptor, Flue Mounting 5' ABS Schedule 40 Vent Pipe (50 gal. 65,000) 5' CPVC Schedule 40 Vent Pipe (75 gal.) 90° ABS Schedule 40 Elbow (50 gal. 65,000) 90° CPVC Schedule 80 Elbow (75 gal.) Vent/Blower Adapter Blower Flue Adaptor Gasket (6' x 10.102") -
Page 31: Troubleshooting Guidelines
TROUBLESHOOTING GUIDELINES TROUBLESHOOTING GUIDELINES TROUBLE SHOOTING Please check guidelines below. For your safety, water heater service should be performed only by a qualifi ed service technician. Read the GENERAL SAFETY INFORMATION section fi rst. LED STATUS PROBLEM SOLUTION 1 Ensure the wall outlet (power supply) is properly The gas control valve/thermostat grounded. - Page 32 LED STATUS PROBLEM SOLUTION 1 Turn the power off for 10-20 seconds then on again to Self diagnostic check has detected clear these error codes. a problem with the gas valve driver circuit, internal microprocessor, or 2 If any of these error codes persist or cannot be cleared other internal circuits.
- Page 33 TROUBLESHOOTING GUIDELINES TROUBLESHOOTING GUIDELINES These guidelines should be utilized by a qualifi ed service agent. When calling for service notify the service agent that this is a “Flammable Vapor Ignition Resistant” Product. PROBLEM CAUSE SOLUTION 1. Blower will not run. A) "ON/OFF"...
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Page 34: Warranty
RESIDENTIAL GAS LIMITED WARRANTY THIS WARRANTY IS APPLICABLE TO THE ORIGINAL • owned by the original purchaser; • installed for indoor operation only; OWNER ONLY, in accordance with the warranty terms and • used at temperatures not exceeding the maximum conditions specifi... -
Page 35: Warranty
PROOF-OF-PURCHASE AND PROOF-OF-INSTALLATION SERVICE AND LABOR RESPONSIBILITY DATE ARE REQUIRED TO SUPPORT WARRANTY CLAIM FROM ORIGINAL OWNER. THIS FORM DOES NOT UNDER THIS LIMITED WARRANTY, THE WARRANTOR CONSTITUTE PROOF-OF-PURCHASE OR PROOF-OF- WILL PROVIDE ONLY A REPLACEMENT WATER HEATER INSTALLATION. OR PART THEREOF. THE OWNER IS RESPONSIBLE FOR ALL OTHER COSTS. - Page 36 Copyright © 2012 A.O. Smith Corporation. All rights reserved.