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FVIR GAS WATER HEATER
(FLAMMABLE VAPOR IGNITION RESISTANT)
FOR SPACE HEATING AND POTABLE WATER HEATING ONLY.
NOT FOR USE IN MOBILE HOMES.
This water heater complies with ANSI Z21.10.1-current
edition regarding the accidental or unintended ignition of
fl ammable vapors, such as those emitted by gasoline.
• Safety Instructions
• Installation
• Operation
INSTALLER:
•
AFFIX THESE INSTRUCTIONS TO OR ADJACENT
TO THE WATER HEATER.
OWNER:
•
RETAIN THESE INSTRUCTIONS AND WARRANTY
FOR FUTURE REFERENCE. RETAIN THE
ORIGINAL RECEIPT AS PROOF OF PURCHASE.
WARNING: Gas leaks can not always be detected by
smell.
Gas suppliers recommend that you use a gas detector
approved by UL or CSA.
For more information, contact the your gas supplier.
If a gas leak is detected, follow the "WHAT TO DO IF YOU
SMELL GAS" instructions.
ALL TECHNICAL AND WARRANTY QUESTIONS: SHOULD BE DIRECTED TO THE LOCAL DEALER FROM WHOM THE WATER HEATER WAS PURCHASED.
IF YOU ARE UNSUCCESSFUL, CONTACT RESIDENTIAL TECHNICAL ASSISTANCE AT 1-800-527-1953 OR WWW.HOTWATER.COM.
PRINTED IN THE U.S.A. 1110
• Care and Maintenance
• Troubleshooting
• Parts List
LOW LEAD
COMPLIANT
Installation Instructions and Use & Care Guide
RESIDENTIAL GAS WATER HEATERS
AN ODORANT IS ADDED TO THE GAS USED
WARNING: If the information in these
instructions is not followed exactly, a fire
or explosion may result causing property
damage, personal injury or death.
— Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
•
Do not try to light any appliance.
•
Do not touch any electrical switch;
do not use any phone in your
building.
•
Immediately call your gas supplier
from a neighbor's phone. Follow the
gas supplier's instructions.
•
If you cannot reach your gas
supplier, call the fire department.
— Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
1
For Your Safety
BY THIS WATER HEATER.
PART NO. 320386-001
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Troubleshooting
Related Manuals for A.O. Smith GAS WATER HEATER
Summary of Contents for A.O. Smith GAS WATER HEATER
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Page 1: Water Heater Safety
Installation Instructions and Use & Care Guide RESIDENTIAL GAS WATER HEATERS FVIR GAS WATER HEATER (FLAMMABLE VAPOR IGNITION RESISTANT) FOR SPACE HEATING AND POTABLE WATER HEATING ONLY. NOT FOR USE IN MOBILE HOMES. This water heater complies with ANSI Z21.10.1-current edition regarding the accidental or unintended ignition of fl... -
Page 2: Table Of Contents
Water Heater Safety ....................................1 Safe Installation, Use and Service ..............................3 Safety Precautions .................................... 3-4 Typical Installation ....................................5 Installing your Gas Water Heater ..............................6-8 Important Information About Your Water Heater ........................6 Consumer Information ................................6 Consumer Responsibilities ..............................6 Unpacking the Water Heater .............................. -
Page 3: 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 water heater to warn you and others of a potential hazard. - Page 4 Fire or Explosion Harzard Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. Avoid all ignition sources if you smell Natural or LP gas. Do not expose water heater control to excessive gas pressure.
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Page 5: Typical Installation
TYPICAL INSTALLATION GET TO KNOW YOUR WATER HEATER - GAS MODELS A Vent Pipe J Inner Door S Gas Control Valve/Thermostat B Draft Hood K Outer Door T Drain Valve C Anode (Not Shown) L Union U Manifold/Burner Assembly D Hot Water Outlet M Inlet Water Shut-off Valve V Flue E Insulation... -
Page 6: Installing Your Gas Water Heater
INSTALLING YOUR GAS WATER HEATER Important Information About This Water Heater Unpacking the Water Heater This gas water heater was manufactured to voluntary safety standards to reduce the likelihood of a flammable WARNING vapor ignition incident. New technology used in meeting these standards makes this product more sensitive to installation errors or improper installation environments. -
Page 7: Location Requirements
Location Requirements If flammable liquids or vapors have spilled or leaked in the area of the water heater, leave the area immediately and call the fire department from a neighbor’s home. Do not attempt to clean the spill until all ignition sources have WARNING been extinguished. -
Page 8: Clearances And Accessibility
EXHAUST FAN REVERSE FLOW OF GASES IMPORTANT: The water heater should be located in an area where leakage of the tank or connections will not result in damage to the area adjacent to the water heater or to lower FIGURE 1B. floors of the structure. -
Page 9: Gas Supply
6” Maximum Air Gap • Install a shut-off valve. Drip Leg • Do not connect a natural gas water heater to an L.P. gas supply. FIGURE 3. • Do not connect an L.P. gas water heater to a natural gas Gas Pressure supply. -
Page 10: Lp Gas Only
LP Gas Only Liquefied petroleum gas is over 50% heavier than air and in the occurrence of a leak in the system, the gas WARNING will settle at floor level. Basements, crawl spaces, closets and areas below ground level will serve as pockets for the accumulation of gas. -
Page 11: Combustion Air And Ventilation
COMBUSTION AIR & VENTILATION TABLE 3 WARNING Minimum Square Typical Room BTUH Input Feet with Carbon Monoxide Warning with 8’ Ceiling 8’ Ceiling Water heater must be vented to outdoors. 30,000 9 x 21 Vent must be installed by a qualified technician using the installation instructions. -
Page 12: All Air From Inside The Building
fresh air can be taken from the outdoors or from crawl or 12” MAXIMUM attic spaces that freely communicate with the outdoors. Attic or crawl spaces cannot be closed and must be properly ventilated to the outside. Ductwork must be of the same cross-sectional area as the free area of the opening to which they connect. -
Page 13: Vent Pipe System
GABLE VENT TO OUTDOORS ALTERNATIVE INSTALL ABOVE OPENING INSULATION LOCATION 1 SQ. INCH CONFINED CONFINED OUTLET PER 3000 BTUH SPACE AIR TO SPACE ATTIC 1 SQ. INCH PER 4000 BTUH INLET AIR FROM ALTERNATE THE CRAWL SPACE AIR INLET ALL AIR FROM OUTDOORS - USING A SINGLE PERMANENT OPENING 1 SQ. -
Page 14: Vent Pipe Size
Align the legs of the draft hood with the slots provided. • The connector must be installed above the extreme Insert the legs and secure the draft hood to the water bottom of the chimney to prevent potentially blocking heater’s top with the four screws provided as shown in the flue gases. -
Page 15: Water System Piping
LISTED VENT CAP WATER SYSTEM PIPING Piping Installation 2 FT. MINIMUM ABOVE ANY OBJECT WITHIN 10 FT. HORIZONTALLY 3 FT. MINIMUM Piping, fittings, and valves should be installed according SUPPORT STRAP to the installation drawing (Figure 13). If the indoor installation area is subject to freezing temperatures, the *MAINTAIN TYPE B DOUBLE... -
Page 16: Closed System/Thermal Expansion
Please note the following: IN A CLOSED SYSTEM, USE A THERMAL EXPANSION TANK • The system should be installed only with piping that is COLD WATER suitable for potable (drinkable) water such as copper, SUPPLY TO FIXTURES HOT WATER CPVC, or polybutylene. This water heater must not be OUTLET MAIN WATER SUPPLY installed using iron piping or PVC water piping. -
Page 17: Temperature & Pressure Relief Valve
Temperature and Pressure Relief Valve charge line. • Must terminate a maximum of six inches above a floor drain or external to the building. In cold climates, it is recommended that the discharge pipe be terminated at an adequate drain inside the building. Explosion Harzard •... -
Page 18: Solar Installation
• This water heater is not to be used as a replacement MUST BE VERTICAL TO DOMSETIC REMOVE AIR BUBBLES EXPANSION TANK for an existing boiler installation. HOT WATER COLD WATER INLET VACUUM • Do not use with piping that has been treated with RELIEF TEMPERING VALVE... -
Page 19: Important Information About This Water Heater
IMPORTANT INFORMATION ABOUT THIS WATER HEATER This gas water heater was manufactured to voluntary safety standards to reduce the likelihood of a flammable vapor ignition incident. The new technology used in meeting these standards makes this product more sensitive to installation errors. -
Page 20: Operating Your Water Heater
OPERATING YOUR WATER HEATER Lighting Instructions WARNING Read and understand these directions thoroughly before attempting to light or re-light the pilot. Make sure the view Explosion Hazard port is not missing or damaged. (See Figure 23.) Make sure the tank is completely filled with water before lighting Replace view port if glass is missing the pilot. -
Page 21: Lighting Instructions
FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. FLAMMABLE BEFORE LIGHTING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED FROM ALL LINES This appliance has a pilot which is lit by a piezo- Use only your hand to push in or turn the gas control knob. -
Page 22: Checking The Draft
A steady flame drawn into the opening indicates proper draft. Due to the nature of the typical gas water heater, the water temperature in certain situations may vary up to 30°F (16.7 °C) higher or lower at the point of use such as, DRAFT HOOD bathtubs, showers, sink, etc. -
Page 23: Operating The Temperature Control System
Water Temperature Adjustment Time for Time for 1st Water Permanent Burns The water temperature setting can be adjusted from 55°F Degree Burn Temperature °F 2nd & 3rd Degree to 155°F. Turn the Gas Control/Temperature Knob to the (Less Severe Burns) (Most Severe Burns) desired setting/temperature. - Page 24 Excessive condensation can cause pilot outage due to 4. The ignition of flammable vapors. water running down the flue tube onto the main burner and A thermopile is used to determine if a pilot flame is putting out the pilot. present, and will shut off the gas supply to the main burner and the pilot if the flame is absent.
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Page 25: Draining And Flushing
The following are typical (but not all) signs of a depleted 3. Close the cold water inlet valve. anode rod: 4. Connect a hose to the drain valve and terminate it to • The majority of the rods diameter is less than 3/8”. an adequate drain or external to the building. -
Page 26: Maintenance Of Your Water Heater
properly. To prevent water damage, the valve must be TEMPERATURE AND PRESSURE properly connected to a discharge line which terminates at RELIEF VALVE MANUAL RELIEF an adequate drain. Standing clear of the outlet (discharged VALVE water may be hot), slowly lift and release the lever handle on the temperature and pressure relief valve to allow the valve to operate freely and return to its closed position. -
Page 27: Replacing The Pilot/ Thermopile Assembly
Replacing the Pilot/ Thermopile Assembly 7. Route the new pilot tube, igniter wire and thermopile wire through the opening in the manifold door. See Figure 25. 1. Remove the manifold door assembly as described in 8. Using the pilot screw removed earlier, attach the new “Removing the Manifold/Burner Assembly”... -
Page 28: External Inspection & Cleaning Of The Base-Ring Filter
External Inspection & Cleaning of the Replacing the Manifold/Burner Assembly Base-Ring Filter WARNING 1. At least annually, check the base-ring filter (Figure 28) for any dust or debris that may have accumulated on the filter screen. NOTE: If the water heater is located in an area that is subjected to lint and dirt, it may be necessary to check the base-ring filter more frequently. -
Page 29: Piezoelectric Igniter System
Removing and Replacing the Gas Control Connect the white (-) thermopile wire to the gas control valve/thermostat, then connect the red thermal switch Valve/Thermostat wires to the thermal switch on the manifold door. (Figure 23). IMPORTANT: This water heater has a resettable thermal switch installed. -
Page 30: Fvir System Operational Checklist
FVIR System Operational Checklist No leaks at pilot and manifold connection. Manifold gasket properly sealed. Manifold door screws securely tightened. Viewport not damaged or cracked. Depress the button on the thermal switch Flame-arrestor free of debris and undamaged. Manifold component block properly installed. TROUBLESHOOTING CHART PROBLEM POSSIBLE CAUSE(S) - Page 31 PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTION 1. Insufficient combustion air 1. Provide ventilation to water heater. Check SLOW HOT WATER RECOVERY flue way, flue baffle, and burner 2. Water heater flue or vent system 2. Clean flue, locate source and correct blocked 3.
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Page 32: Pilot Light Troubleshooting Flowchart
PILOT LIGHT TROUBLESHOOTING FLOWCHART Section A: Pilot light will not light (new installation). Section C: Pilot light will not remain lit. Complete this section after completing Section B. Is the manual gas shut-off valve, Turn the manual gas shut-off valve to Check for insufficient combustion air. -
Page 33: Status Light And Diagnostic Code Troubleshooting Chart
STATUS LIGHT AND DIAGNOSTIC CODE TROUBLESHOOTING CHART LED STATUS PROBLEM CORRECTIVE ACTION 0 FLASHES (LED NOT LIT) Pilot light is not lit or Thermopile Turn Gas Control Valve/Thermostat knob to OFF. Wait has not yet reached normal 10 minutes, then attempt to relight Pilot by following operating temperature. -
Page 34: Status Light And Diagnostic Code Troubleshooting Chart
STATUS LIGHT AND DIAGNOSTIC CODE TROUBLESHOOTING CHART (Continued) LED STATUS PROBLEM CORRECTIVE ACTION Relight pilot and verify 4 flashes. If 4 flashes are 4 FLASHES The Gas Control Valve’s temperature sensor has detected observed, turn Gas Control Valve/Thermostat knob that the water temperature was to OFF. -
Page 35: Notes
NOTES... -
Page 36: Repair Parts
REPAIR PARTS ILLUSTRATION When ordering repair parts, always give the following information: Model, serial, and product number Type of gas Item number Parts description Repair Parts List Item Parts Description DRAFT HOOD HEAT TRAP (COLD) - SOME MODELS HEAT TRAP (HOT) - SOME MODELS COLD WATER DIP TUBE ANODE ROD TEMPERATURE &... -
Page 37: Listed Parts Kits And Illustrations
Listed Parts Kits and Illustrations Item 11A: Pilot / Thermopile Assembly kit, which contains the pilot / pilot tube assembly, thermopile, and igniter electrode. (Natural Gas) Item 11B: Pilot / Thermopile Assembly kit, which contains the pilot / pilot tube assembly, thermopile, and igniter electrode. (L.P. -
Page 38: Warranty
LIMITED RESIDENTIAL GAS WARRANTY THIS WARRANTY IS APPLICABLE TO THE ORIGINAL • used in a non-corrosive and non-contaminated OWNER ONLY in accordance with the warranty terms and atmosphere; conditions specifi ed below. • used with factory approved anode(s) installed; • in its original installation location;... -
Page 39: Warranty
LIMITATION ON IMPLIED WARRANTIES NOT BE RESPONSIBLE FOR WATER DAMAGE, LOSS OF USE OF THE UNIT, INCONVENIENCE, LOSS OR DAMAGE Implied warranties, including any warranty of merchantability TO PERSONAL PROPERTY, OR OTHER CONSEQUENTIAL imposed on the sale of this heater under state law are limited DAMAGE. - Page 40 Copyright © 2010 A.O. Smith Corporation. All rights reserved.