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FVIR GAS WATER HEATER
(FLAMMABLE VAPOR IGNITION RESISTANT)
FOR 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 0910
Installation Instructions and Use & Care Guide
• Care and Maintenance
• Troubleshooting
• Parts List
LOW LEAD
COMPLIANT
RESIDENTIAL GAS WATER HEATERS
For Your Safety
AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.
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
PART NO. 319557-000
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Table of Contents
Troubleshooting
Related Manuals for A.O. Smith FVIR
Summary of Contents for A.O. Smith FVIR
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Page 1: For Your Safety
Installation Instructions and Use & Care Guide RESIDENTIAL GAS WATER HEATERS FVIR GAS WATER HEATER (FLAMMABLE VAPOR IGNITION RESISTANT) FOR 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
Igniter System ..................................28 Testing the Igniter System ..............................28 Removing and Replacing the Gas Control Valve/Thermostat ..................28-29 FVIR System Operational Checklist ............................29 Troubleshooting Checklist ................................29-30 Status Light Troubleshooting Flowchart ............................ 31-32 Sequence of Operation Chart ................................33 Repair Parts Illustration ................................ -
Page 3: Water Heater Safety
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 Pilot and Main Burner D Hot Water Outlet M Inlet Water Shut-off Valve V Flue... -
Page 6: Installing Your Gas Water Heater
Do not discard this manual. You or future users of this water heater will need it for future reference. The Flammable Vapor (FV) Sensor is designed to reduce Service to the FVIR System should only be performed by a the risk of flammable vapor-related fires. Flammable liquids qualified technician. -
Page 7: Site Locations
In the event of a flammable vapor Keep combustibles such as boxes, magazines, clothes, etc. away incident, the FVIR System disables the water heater by from the water heater area. shutting off the gas supply to the water heater’s burner and... -
Page 8: Clearances And Accessibility
• Water supply shut-off devices that activate based on the water pressure differential between the cold water and hot water pipes connected to the water heater. • Devices that will turn off the gas supply to a gas water heater while at the same time shutting off its water supply. -
Page 9: Gas Supply
GAS SUPPLY WARNING MANUAL GAS SHUT-OFF VALVE GROUND JOINT UNION DISCHARGE PIPE CHECK WITH (DO NOT CAP LOCAL UTILITY OR PLUG) FOR MINIMUM HEIGHT Explosion Hazard 3” MINIMUM • Use a new CSA approved gas supply line. • Install a shut-off valve. 6”... -
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 SPACE AIR TO 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 FIGURE 11. -
Page 14: Vent Pipe Size
Align the legs of the draft hood with the slots provided. codes, the “National Fuel Gas Code”, ANSI Z223.1(NFPA Insert the draft hood leg tips into slots on the flue damper’s 54)-current edition. • The connector must be installed above the extreme flange as shown in Figure 12. -
Page 15: Water System Piping
NFPA 54, ANSI Z223.1-current edition and the guidelines WATER SYSTEM PIPING set forth by prevailing local codes. Piping Installation LISTED VENT CAP Piping, fittings, and valves should be installed according 2 FT. MINIMUM ABOVE ANY OBJECT to the installation drawing (Figure 16). If the indoor WITHIN 10 FT. -
Page 16: Closed System/Thermal Expansion
Please note the following: IN A CLOSED SYSTEM USE A • The system should be installed only with piping that is THERMAL EXPANSION TANK suitable for potable (drinkable) water such as copper, COLD WATER SUPPLY TO FIXTURES CPVC, or polybutylene. This water heater must not be PRESSURE REDUCING VALVE WITH BYPASS installed using iron piping or PVC water piping. -
Page 17: Temperature & Pressure Relief Valve
Temperature and Pressure Relief Valve The Discharge Line: • Must not be smaller than the pipe size of the relief valve or have any reducing coupling installed in the discharge line. • Must not be capped, blocked, plugged or contain any Explosion Harzard valve between the relief valve and the end of the dis- charge line. -
Page 18: 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 19: Operating Your Water Heater
OPERATING YOUR WATER HEATER Lighting Instructions WARNING Read and understand these directions thoroughly before attempting to start or re-start the water heater. Make sure Explosion Hazard the viewport is not missing or damaged. (See Figure 27) Make sure the tank is completely filled with water before Replace view port if glass is missing turning the power switch on. -
Page 20: Checking The Draft
Checking the Draft Water Temperature Regulation Water temperature over 125°F (52°C) WARNING can cause servere burns instantly resulting in severe injury or death. Burn Hazard Children, the elderly, and the physically or mentally disabled are at Do not touch vent. highest risk for scald injury. -
Page 21: Water Temperature Adjustment
160°F (Approx.) Water Time for 1st Time for Permanent Burns Temperature Degree Burn 2nd & 3rd Degree Status Light °F (Less Severe Burns) (Most Severe Burns) 120°F STATUS (normal shower temp.) Position (pain threshold) 35 minutes 45 minutes 1 minute 5 minutes 5 seconds 25 seconds... -
Page 22: Electrical Connections/Wiring Diagram
ELECTRICAL CONNECTIONS/WIRING DIAGRAM Electrical Connections WARNING Before plugging in the water heater, always make sure: • The Voltage and frequency correspond to that specified on the Electric Shock Hazard water heater. • The electrical outlet has the proper overload fuse or breaker protection. -
Page 23: Operational Conditions
Operational Conditions periods of heat-up and cool-down. 2. Condensation causes sizzling and popping within the Condensation burner area and should be considered normal. Whenever the water heater is filled with cold water, some 3. Sediment buildup in the tank bottom will create varying condensate will form while the burner is on. -
Page 24: Draining And Flushing
Draining and Flushing Anode Rod/Water Odor Each water heater contains at least one anode rod, which will slowly deplete while protecting the glass-lined tank from corrosion and prolonging the life of the water heater. Once the anode is depleted, the tank will start to corrode, eventually developing a leak. -
Page 25: Temperature And Pressure Relief Valve
4. Remove the two screws (1/4” nut driver) securing the manifold IMPORTANT: The following maintenance procedures are door assembly to the combustion chamber (Figure 27). for the FVIR System components and should be performed by a qualified technician. Replacement parts may be ordered through your plumber or the local distributor. -
Page 26: Removing The Burner From The Manifold/Burner Assembly
Removing the Burner from the Manifold/ OLD PILOT/IGNITER - Burner Assembly FLAME SENSOR ASSEMBLY Natural Gas (Low Nox) & L.P. Gas Burner SCREWS OTHER FITTINGS 1. Take off the burner by removing the two (2) screws lo- NOT SHOWN cated underneath the burner. FOR CLARITY 2. -
Page 27: Cleaning The Combustion Chamber And Flame-Arrestor
Cleaning the Combustion Chamber and 2. Inspect the view port for damage and replace as required. Flame-arrestor 3. Insert the manifold/burner assembly into the burner compartment, making sure that the tip of the manifold 1. Follow procedure outlined in “Removing the Manifold/ tube engages in the slot of the bracket inside the com- Burner Assembly”. -
Page 28: Igniter System
3. Drain the water heater. Refer to the section of “Drain- CLOSE-UP INSIDE VIEW OF THE COMBUSTION CHAMBER. ing and Flushing” section and follow the procedure. 5. Disconnect the wire harness, flammable vapor sen- sor wires, and igniter wire from the gas control valve/ BURNER thermostat. -
Page 29: Fvir System Operational Checklist
FVIR System Operational Checklist 5. No leaks at pilot and manifold connection. 1. Manifold gasket properly sealed. 6. Manifold door screws securely tightened. 2. Viewport not damaged or cracked. 7. Depress the button on the thermal switch 3. Flame-arrestor free of debris and undamaged. - Page 30 INSUFFICIENT HOT WATER 1. Thermostat set too low Turn temperature dial to desired setting Sediment or lime in tank Drain/flush-provide water treatment if needed Water heater too small Install adequate heater Wrong piping connections Correct piping-dip tube must be in cold inlet Leaking faucets Repair faucets Wasted hot water...
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Page 31: Status Light Code
STATUS LIGHT TROUBLESHOOTING FLOWCHART Status Light Code LED FLASH CONTROL STATUS CORRECTIVE ACTION SEQUENCE Short flash once every four second IDLE (No call for heat, no fault conditions) “Heartbeat”, alternates bright/dim Call for Heat (No fault conditions) One Flash, three second pause Low Flame Signal (control continues to Turn the power switch on the gas control valve to the “OFF”... - Page 32 STATUS LIGHT TROUBLESHOOTING FLOWCHART LED FLASH CONTROL STATUS CORRECTIVE ACTION SEQUENCE Six-Two Flash, three second pause Soft Lockout* - Recycle Limit - Flame Lost - Turn the power switch on the gas control valve to the “OFF” position and unplug the power cord from the power outlet.
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Page 33: Sequence Of Operation Chart
SEQUENCE OF OPERATION CHART Apply Power to Appliance. Is there a Call for Heat. Will not attempt to light. 2 flash error code. See Is Damper Corrective Action Table Closed? on pages 31-32. Damper Energizes. Gas Valve attempts to open damper for 30 seconds, displays 3 flash error code, and then waits 2 mintues before Is Damper... -
Page 34: Repair Parts Illustration
MANIFOLD DOOR GASKET VIEWPORT ASSEMBLY 18** TRANSFORMER ASSEMBLY KIT *Pictured on next page. ** Not shown. LEGEND Special anode rod (see Anode Rod/Water Odor section) Temperature and Pressure Relief Valve is required, but may not be factory installed Unique: FVIR System parts... -
Page 35: Listed Parts Kits And Illustrations
Listed Parts Kits and Illustrations Item 12A: Pilot/Igniter-Flame Sensor assembly kit, which contains the pilot, igniter-flame sensor, and retainer clip (Natural Gas) Item 12B: Pilot/Igniter-Flame Sensor assembly kit, which contains the pilot, igniter-flame sensor, and retainer clip (L.P. Gas) Item 13A: Burner (Natural Gas/L.P. Gas) Item 13B: Burner (L.P. -
Page 36: Notes
NOTES... - Page 37 NOTES...
- Page 38 NOTES...
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Page 39: Warranty
LIMITED RESIDENTIAL GAS WARRANTY THIS WARRANTY IS APPLICABLE TO THE ORIGINAL • in the United States, its territories or possessions, and OWNER ONLY in accordance with the warranty terms and Canada; conditions specifi ed below. • sized in accordance with proper sizing techniques for residential water heaters;... - Page 40 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.