A.O. Smith GVR-50 Use and Care Guide

1This water heater complies with ANSI Z21.10.1-current edition regarding the accidental or unintended ignition of fl ammable vapors, such as those emit

10LP Gas Only WARNINGExplosion HazardHave a qualified person make sure L.P. gas pre

11TABLE 3BTUH InputMinimum SquareFeet with8’ CeilingTypical Roomwith 8’ Ceiling30,000 188 9 x 2145,000 281 14 x 2060,000 375 15 x 2575,000 469 15 x 31

1212” MAXIMUMPERMANENTOPENINGS TOTHE OUTSIDE OR ADDITIONAL ROOMS WITHINTHE BUILDINGCLOSETOR OTHER CONFINED SPACE12” MAXIMUMFIGURE 4.All Air from Insid

13ALTERNATIVEOPENINGLOCATION1 SQ. INCH PER 3000 BTUHCONFINEDSPACEALL AIR FROM OUTDOORS - USING A SINGLE PERMANENT OPENINGFIGURE 8B.Vent Pipe System

14Align the legs of the draft hood with the slots provided. Insert the legs and secure the draft hood to the water heater’s top with the four screws p

15Piping Installation Piping, fittings, and valves should be installed according to the installation

16METALDRAIN PAN1 3/4” DEPTH MAXIMUMFLOOR DRAINDRAIN LINE 3/4” ID MINIMUMDISCHARGE PIPEDO NOT CAP OR PLUGTEMPERATURE AND PRESSURE RELIEF VALVEIN A CLO

17charge 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

18• This water heater is not to be used as a replacement for an existing boiler installation.• Do not use with piping that has been treated with chr

19IMPORTANT INFORMATION ABOUT THIS WATER HEATERThis gas water heater was manufactured to voluntary safety standards to reduce the likelihood of a flam

2TABLE OF CONTENTSWater Heater Safety ...

20WARNINGExplosion HazardReplace view port if glass is missingor damaged.Failure to do so can result in death,explosion or fire.Lighting Instructions

21FOR YOUR SAFETY READ BEFORE LIGHTINGWARNING: FLAMMABLE If you do not follow these instructions exactly, afire or explosion may result causing proper

22Water Temperature Regulation Water temperature over 125°F (52°C) can cause servere burns instantly resulting in se

23Water Temperature °FTime for 1st Degree Burn (Less Severe Burns)Time for Permanent Burns 2nd & 3rd Degree (Most Severe Burns)1101161161221311401

244. The ignition of flammable vapors.A thermopile is used to determine if a pilot flame is present, and will shut off the gas supply to the main bur

25The following are typical (but not all) signs of a depleted anode rod:• The majority of the rods diameter is less than 3/8”.• Significant sections

26TEMPERATURE AND PRESSURERELIEF VALVEDISCHARGE LINE TO DRAINMANUAL RELIEFVALVEFIGURE 21.6. Use needle nose pliers to disconnect the white (-) thermo

27Replacing the Pilot/ Thermopile Assembly 1. Remove the manifold door assembly as described in “Remov

28External Inspection & Cleaning of the Base-Ring Filter 1. At least annually, check

297. Connect the white (-) thermopile wire to the gas control valve/thermostat, then connect the red thermal switch wires to the thermal switch on th

3SAFE INSTALLATION, USE AND SERVICEYour safety and the safety of others is extremely important in the installation, use and servicing of this water he

30FVIR System Operational Checklist 1. Manifold gasket properly sealed.2. Viewport not damaged or cracked.3. Fla

31PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTIONSLOW HOT WATER RECOVERY1. Insufficient combustion air2. Water heater flue or vent system blocked3. Low

32PILOT LIGHT TROUBLESHOOTING FLOWCHARTHave you bled all the air from the pilot tube and gas supply line?NOWhile repeatedly depressing the igniter but

33LED STATUS PROBLEM CORRECTIVE ACTION0 FLASHES (LED NOT LIT) Pilot light is not lit or Thermopile has not yet reached normal operating temperature.Tu

34STATUS LIGHT AND DIAGNOSTIC CODE TROUBLESHOOTING CHART (Continued)LED STATUS PROBLEM CORRECTIVE ACTION4 FLASHES The Gas Control Valve’s temperature

35NOTES

36REPAIR PARTS ILLUSTRATION25146879103When ordering repair parts, always give the following information:1. Model, serial, and product number2. Type

37Listed Parts Kits and Illustrations

38THIS WARRANTY IS APPLICABLE TO THE ORIGINAL OWNER ONLY in accordance with the warranty terms and conditions specifi ed below.The warrantor will furni

39LIMITATION ON IMPLIED WARRANTIESImplied warranties, including any warranty of merchantability imposed on the sale of this heater under state law are

4Fire or Explosion HarzardDo not store or use gasoline or other flammable vapors andliquids in the vicinity of this or any other appliance. Avoid all

40Copyright © 2010 A.O. Smith Corporation. All rights reserved.

5TYPICAL INSTALLATIONGET TO KNOW YOUR WATER HEATER - GAS MODELS A Vent Pipe B Draft Hood C Anode (Not Shown) D Hot Water Outlet E Insulation F

6INSTALLING YOUR GAS WATER HEATERImportant Information About This Water Heater This gas water heater was manufactured to voluntary safety standa

7Location Requirements Carbon Monoxide Poisoning HazardWARNINGDo not install in a mobile home. Doing so

8IMPORTANT: 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 t

9Manual GasShut-off ValveGroundJointUnionDrip Leg3” MinimumCheck with localutility forminimum height6” MaximumAir GapFIGURE 3.Gas Pressure