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36

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led status

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7

8

9

Self diagnostic check has detected 

a problem with the gas valve driver 

circuit, internal microprocessor, or 

other internal circuits.

1  Turn the power off for 10-20 seconds then on again to 

clear these error codes.

2  If any of these error codes persist or cannot be cleared 

- replace the gas control valve/thermostat.

10

The gas control valve/thermostat 

has sensed main burner flame out 

of proper sequence.

1  Turn the power off for 10-20 seconds then on again to 

clear these error codes.

2  Replace the gas control valve/thermostat if this error 

code persists.

11

Water temperature in the tank has 

exceeded 195° F and has activated 

the ECO (energy cut off) high 

temperature limit.

1  Turn the power off for 10-20 seconds then on again to 

clear these error codes.

2  Replace the gas control valve/thermostat if the error 

code persists.

12

Self diagnostic check has detected 

that one or both of the temperature 

adjust buttons are stuck.

1  Press and release both temperature adjust buttons 

several times - cycle water heater power off and on.

2  Replace the gas control valve/thermostat if the error 

code persists.

13

Self diagnostic check has detected 

the water temperature sensor 

(located in the control valve's 

immersion probe) is either open or 

shorted.

1  Turn the power off for 10-20 seconds then on again to 

clear these error codes.

2  Replace the gas control valve/thermostat if the error 

code persists.

14

Self diagnostic check has detected 

a problem with black resistor wire 

on the ignitor assembly plug; 

resistor wire is open or shorted.

1  Turn off power to the water heater.  Ensure black 

resistor wire is not cut, missing, and is installed 

between pins 3 & 4 of ignitor assembly plug. Replace 

ignitor assembly if damaged or defective.

2  Replace the gas control valve/thermostat if the error 

code persists.

15

Self diagnostic check has 

determined resistance of the black 

resistor wire on ignitor assembly 

plug is not within tolerance.

1  Turn off power to the water heater.

2  Replace the igniter assembly plug.

3  Replace the gas control valve/thermostat if the error 

code persists.

16

The gas control valve/thermostat 

has detected the air pressure switch 

circuit is opening repeatedly during 

one heating cycle.

1  Ensure air pressure switch hose is not kinked or 

clogged, ensure the blower housing is clear of any 

condensation.

2  Check vent temperature limit switch - if it is determined 

that the vent temperature limit switch is opening its 

contacts at normal operating temperatures during 

heating cycle - replace the vent temperature limit 

switch.

3  Ensure water heater is not over-firing. Call the technical 

support for further assistance.

Summary of Contents for GPHE 50 Series

Page 1: ...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 RESIDENTIAL GAS WATER HEATERS For Your Safety AN ODO...

Page 2: ...alert symbol indicates a potentially hazardous situation which if not avoided could result in property damage WARNING CAUTION CAUTION DANGER All safety messages will generally tell you about the type...

Page 3: ...3 GENERAL SAFETY INFORMATION...

Page 4: ...4 GENERAL SAFETY INFORMATION at least 18 45 7cm above the floor This will reduce but not eliminate the risk...

Page 5: ...tion Association 1 Batterymarch Park Quincy MA 02269 3 The water heater when installed must be grounded in accordance with the local codes or in the absence of local codes the National Electrical Code...

Page 6: ...feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment The sign shall read in print size no less than one half 1 2 inch...

Page 7: ...ting 4 Places Shown DD Plastic Top EE On Off Switch FF Exhaust Tee GG Elbow GET TO KNOW YOUR WATER HEATER GAS MODELS A Vent Pipe B Anode C Hot Water Outlet D Outlet 120 VAC F Gas Supply G Main Manual...

Page 8: ...8 TYPICAL INSTALLATION CONDENSATE HOSE AND DRAIN PAN FIGURE 1A...

Page 9: ...time to burn relationship for normal adult skin If anyone using hot water provided by the water heater being installed fits into one of these groups or if there is a local code or state law requiring...

Page 10: ...talled 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 However unanticipated damage can be reduced or p...

Page 11: ...rine based chemicals refrigerants etc in addition to being highly flammable in many cases will also react to form corrosive hydrochloric acid when exposed to the combustion products of the water heate...

Page 12: ...size of openings providing fresh air into confined spaces EXHAUST FANS Where exhaust fans are installed additional air should be provided to replace the exhausted air When an exhaust fan is installed...

Page 13: ...a reference for the openings that provide fresh air into confined spaces only Do not refer to these illustrations for the purpose of vent installation See Installation of Vent System on pages 18 27 fo...

Page 14: ...e requirements or such conditions as high line pressure among others have installed devices such as pressure reducing valves check valves and back flow preventers Devices such as these cause the water...

Page 15: ...n 6 Spread the slit open and slip the insulation over the cold water inlet pipe Apply gentle pressure along the length of the insulation to ensure that it is fully seated around the pipe Also ensure t...

Page 16: ...xcessive temperatures and pressures in the storage tank The T P valve is not intended for the constant relief of thermal expansion Aproperly sized thermal expansion tank must be installed on all close...

Page 17: ...losing its individual manual Shuttoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1 2 pound per square inch 3 5 kPa Connecting gas piping...

Page 18: ...PVC parts should be assembled with ASTM D 2564 grade cement Assemble Vent Pipe Assemblies 1 2 and 3 See Figure 1 prior to cementing The preferred orientation of Vent Pipe Assembly 1 Condensate U Assem...

Page 19: ...L Clearance above paved sidewalk or paved driveway located on public property 7 feet 2 13 m F Clearance to outside corner 2 feet 60 cm M Clearance under veranda porch deck or balcony 12 inches 30 cm G...

Page 20: ...r signs of sagging or other stresses in joints as a result of misalignment of any components in system If any of these conditions are found they must be corrected in accordance with venting instructio...

Page 21: ...tubing is still attached from the air pressure switch to the port on the blower housing Make sure the plastic tubing is not folded anywhere between the pressure switch and the blower housing 6 Make su...

Page 22: ...ine This will allow the vent to easily slide through the opening The resulting gap will be covered up by the Vent Terminal cover plate Repeat this step on inside wall if necessary SEQUENCE OF INSTALLA...

Page 23: ...ighest anticipated snow level install a snorkel as shown in bottom portion of Figure 20 NOTE With the installation of a snorkel it is necessary to use two 90 elbows that shall be considered along with...

Page 24: ...cement not included with kit and glue the two inch PVC pipe coming from the blower into the VAA 3 Perform the same sequence on the PVC pipe coming from the exhaust side vent terminal side of the VAA 4...

Page 25: ...and the vent pipe system Air leaks will allow flue gas by products to disseminate into the room creating an unsafe environment and could cause illness asphyxiation and or even death FIGURE 24 Typical...

Page 26: ...above PRIMER It is recommended that Tetrahydrofuran THF be used to prepare the surfaces of pipe and fittings for solvent welding Do not use water rags gasoline or any other substitutes for cleaning PV...

Page 27: ...make a second mark as the primer and cement will most likely destroy your first one Apply primer to the surface of the pipe and fitting socket with a natural bristle brush This process softens and pr...

Page 28: ...28...

Page 29: ...located in an area where the general public does not have access If a suitable area is not available a cover should be installed over the thermostat to prevent tampering Thewatertemperaturesettingwasf...

Page 30: ...riod of time generally two weeks or more Hydrogen gas is extremely flammable and explosive To prevent the possibility of injury under these conditions we recommend the hot water faucet located farthes...

Page 31: ...od which will slowly deplete due to electrolysis prolonging the life of the water heater by protecting the glass lined tank from corrosion Adverse water quality hotter water temperatures high hot wate...

Page 32: ...essure Relief Valve must be installed in opening provided Can result in overheating and excessive tank pressure Can cause serious injury or death DRAINING AND FLUSHING It is recommended that the water...

Page 33: ...ose connections or the relief valve DO NOT replace the water heater until a full inspection of all possible water sources is made and necessary corrective steps taken Leakage from other appliances wat...

Page 34: ...heet 34 Wire Screen 3 35 Wire Screen 4 36 Wall Plate 4 37 Flexible Tubing REPAIR PARTS LIST Nowthatyouhavepurchasedthiswaterheater shouldaneedeverexistfor repairpartsorservice simplycontactthecompanyi...

Page 35: ...3 Ensure maximum number of elbows or maximum equivalent feet of vent or intake air pipe has not been exceeded per the installation instructions in the manual that came with the water heater 4 Ensure...

Page 36: ...alve s immersion probe is either open or shorted 1 Turn the power off for 10 20 seconds then on again to clear these error codes 2 Replace the gas control valve thermostat if the error code persists 1...

Page 37: ...37 These guidelines should be utilized by a qualified service agent TROUBLESHOOTING GUIDELINES TROUBLESHOOTING GUIDELINES...

Page 38: ...38 TROUBLESHOOTING GUIDELINES NOTES...

Page 39: ...of it in a modified form or any attempt to repair tank leaks or parts will void this warranty servIce and laBor responsIBIlItY UNDER THIS LIMITED WARRANTY THE WARRANTOR WILL PROVIDE ONLY A REPLACEMEN...

Page 40: ...40 Copyright 2010 A O Smith Corporation All rights reserved 500 Tennessee Waltz Parkway Ashland City TN 37015 Technical Support 800 527 1953 Parts 800 433 2545 Fax 800 644 9306 www hotwater com...

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