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  5. Instruction Manual

A.O. Smith Gphe 50 Instruction Manual

Manual is about: SERIES 100 resIdentIal Gas water heaters

Summary of Gphe 50

  • Page 1

    1 instruction manual printed 0413 197423-006 keep this manual in the pocket on heater for future reference whenever maintenance adjustment or service is required. All technical and warranty questions: should be directed to the local dealer from whom the water heater was purchased. If you are unsucce...

  • Page 2: Approvals

    2 safe installation, use and service the proper installation, use and servicing of this water heater is extremely important to your safety and the safety of others. Many safety-related messages and instructions have been provided in this manual and on your own water heater to warn you and others of ...

  • Page 3: General Safety Information

    3 general safety information.

  • Page 4: General Safety Information

    4 general safety information at least 18" (45.7 cm) above the floor. This will reduce, but not eliminate, the risk.

  • Page 5: Introduction

    5 thank you for purchasing this water heater. Properly installed and maintained, it should give you years of trouble free service. Abbreviations found in this instruction manual: • csa-canadianstandardsassociation • ansi-americannationalstandardsinstitute • nfpa-nationalfireprotectionassociation • a...

  • Page 6

    6 installation requirements for the commonwealth of massachusetts 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 re...

  • Page 7: Typical Installation

    7 pp ss (see access panel caution) w 6 (15 cm) maximum air gap to a suitable drain typical installation * caution harness has 120 vac. In operation. ** see “planning the vent system”, “condensate” and “blower assembly installation” for more information. *** the side recirculation loop connections ma...

  • Page 8: Typical Installation

    8 typical installation condensate hose and drain pan figure 1a..

  • Page 9: Typical Installation

    9 typical installation figure 2. Mixing valve / thermal expansion tank usage and space heating mixing valves danger water temperature over 125°f (52°c) can cause severe burns instantly resulting in severe injury or death. Children, the elderly and the physically or mentally disabled are at highest r...

  • Page 10

    10 facts to consider about the location carefully choose an indoor location for the new water heater, because the placement is a very important consideration for the safety of the occupants in the building and for the most economical use of the appliance. This water heater is not for use in manufact...

  • Page 11

    11 inanalcoveorcloset,theentirefloormustbecoveredbythepanel. Failuretoheedthiswarningmayresultinafirehazard. Minimum clearances between water heater and combustible constructionare0inchatthesidesandrear,5.5”(14.0cm)fromthe frontand12”(30.5cm)fromtop.(standardclearance.)ifclearances stated on the hea...

  • Page 12

    12 such a condition often will result in a yellow, luminous burner flame, causing sooting of the combustion chamber, burners and flue tubes and creates a risk of asphyxiation. Do not install the water heater in a confined space unless an adequate supply of air for combustion and ventilation is broug...

  • Page 13

    13 figure 7. The water heater should have clearances of at least 1 inch (25mm)fromthesidesandbackand6inches(150mm)fromthefront of the appliance. The opening should directly communicate with the outdoors or should communicate through a vertical or horizontal duct to the outdoors or spaces that freely...

  • Page 14: Danger

    14 this water heater should not be connected to any heating systems or component(s)usedwithanon-potablewaterheatingappliance. All piping components connected to this unit for space heating applications should be suitable for use with potable water. Toxic chemicals, such as those used for boiler trea...

  • Page 15

    15 thermal expansion aswaterisheated,itexpands(thermalexpansion).Inaclosedsystem the volume of water will grow when it is heated. As the volume of water grows there will be a corresponding increase in water pressure due to thermal expansion. Thermal expansion can cause premature tank failure (leakag...

  • Page 16: Caution

    16 discharge opening must not be blocked or reduced in size under any circumstances.Excessivelength,over30feet(9.14m),oruseof more than four elbows can cause restriction and reduce the discharge capacity of the valve. No valve or other obstruction is to be placed between the temperature-pressure rel...

  • Page 17

    17 a gas line of sufficient size must be run to the water heater. Consultthecurrenteditionofnationalfuelgascode(ansi z223.1/nfpa54)andyourgassupplierconcerningpipesize. There must be: • areadilyaccessiblemanualshuttoffvalveinthegassupplyline serving the water heater, and • asedimenttrapaheadofgascon...

  • Page 18

    18 never use this water heater unless it is completely full of water. To prevent damagetothetank,thetankmustbefilledwithwater.Watermustflow fromthehotwaterfaucetbeforeturning“on”gastothewaterheater. Tofillthewaterheaterwithwater: 1. Close the water heater drain valve by turning handle to the right (...

  • Page 19

    19 termination clearances sidewall power vent v x vent terminal air supply inlet area where terminal is not permitted v v a g v fixed closed fixed closed operable operable v c b b b b f b v v a j v h m x x v v k b e d l power vent (using room air for combustion) exterior clearances for sidewall vent...

  • Page 20

    20 planning the vent system plan the route of the vent system from the discharge of the blower to the planned location of the vent terminal. Refer to vaa instruction on page 24 while planning the vent system. 1. Layout total vent system to use a minimum of vent pipe and elbows. 2. Thiswaterheaterisc...

  • Page 21

    21 thecondensatetrapmaybeprimedbyfillingthecondensate u-assembly with tap water while the water heater is not operating. The system is fully primed when the water level reaches the adaptor connected into the tee. In most installations the water heater will self-primethecondensatetrapduringthefirstfu...

  • Page 22

    22 caution label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing. Power vent wiring schematic - figure 19. May be easier to mark both the inside and outside wall. Align holes by drilling a hol...

  • Page 23

    23 installation of vent system, sidewall with the route of the venting system and selection of materials completed, as discussed in the section of this manual titled planning the vent system,thethroughthewallventterminalinplaceandthefirstsection ofpiping,uptofirstelbow,installedatthebloweritistimeto...

  • Page 24

    24 vent attenuation assembly installation instructions the ventattenuationassembly (vaa) is designed to provide a reduction in fan noise created in the blower wheel. This installation of this vaa is optional. Review directions thoroughly prior to installing the new vaa. Please contact the manufactur...

  • Page 25

    25 barb, use a wire tie or hose clamp (not supplied with kit) and secure. 6. Take the other end of the flexible tubing and slide it through the hose clamp on the jacket top cover and install it into one of the four barb fittings in vent pipe assembly #2. 7. Onceinstalledalongwiththerestoftheventconf...

  • Page 26

    26 vent pipe preparation 1. Initial preparation a. Make sure the solvent cement you are planning to use is designedforthespecificapplicationyouareattempting. B. Know the physical and chemical characteristics and limitations of the pvc and cpvc piping materials that you are about to use. C. Know the ...

  • Page 27

    27 b. Deburring useaknife,plasticpipedeburringtool,orfiletoremoveburrsfromthe end of small diameter pipe. Be sure to remove all burrs from around the insideaswellastheoutsideofthepipe.Aslightchamfer(bevel)ofabout 10°-15°shouldbeaddedtotheendtopermiteasierinsertionofthepipe intotheendofthefitting.Fai...

  • Page 28

    28.

  • Page 29: Temperature Regulation

    29 it is recommended that lower water temperatures be used to avoid the risk of scalding. It is further recommended, in all cases, that the watertemperaturebesetforthelowesttemperaturewhichsatisfies yourhotwaterneeds.Thiswillalsoprovidethemostenergyefficient operation of the water heater. Short repe...

  • Page 30: For Your Information

    30 for your information start up conditions smoke/odor it is not uncommon to experience a small amount of smoke and odor during the initial start-up. This is due to burning off of oil from metal parts, and will disappear in a short while. Strange sounds possible noises due to expansion and contracti...

  • Page 31

    31 burner operation and inspection flood damage to a water heater may not be readily visible or immediately detectable.However,overaperiodoftimeafloodedwaterheaterwill create dangerous conditions which can cause death, serious bodilyinjury,orpropertydamage.Contactaqualifiedinstaller orserviceagencyt...

  • Page 32: Danger

    32 temperature-pressure relief valve test danger • burn hazard. • hot water discharge. • keep clear of temperature- pressure relief valve discharge outlet. It is recommended that the temperature-pressure relief valve should be checked to ensure that it is in operating condition every 6 months. When ...

  • Page 33: Leakage Checkpoints

    33 leakage checkpoints neverusethiswaterheaterunlessitiscompletelyfilledwithwater. Topreventdamagetothetank,thetankmustbefilledwithwater. Watermustflowfromthehotwaterfaucetbeforeturning“on”gas to the water heater. A *condensation may be seen on pipes in humid weather or pipe connections may be leaki...

  • Page 34: Repair Parts List

    34 key no. Part description 1 outer door 2 anode 3 control valve assembly 4 plastic top 5 blower assembly 6 switch and harness assembly 7 t&p valve 8 drain valve 9 wiring harness 10 anode outlet 11 vent pipe assembly #1 12 vent pipe assembly #2 13 vent pipe assembly #3 14 inlet tube 15 pipe nipple 1...

  • Page 35: Troubleshooting Guidelines

    35 troubleshooting guidelines trouble shooting pleasecheckguidelinesbelow.Foryoursafety,waterheaterserviceshouldbeperformedonlybyaqualifiedservicetechnician. Readthegeneralsafetyinformationsectionfirst. Intelli-vent troubleshooting chart - user control # led status problem solution 1 inadequate or n...

  • Page 36

    36 # led status problem solution 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...

  • Page 37: Troubleshooting Guidelines

    37 theseguidelinesshouldbeutilizedbyaqualifiedserviceagent. Troubleshooting guidelines troubleshooting guidelines.

  • Page 38: Troubleshooting Guidelines

    38 troubleshooting guidelines notes.

  • Page 39

    39 36 this warranty is applicable to the original owner only. If the glass lined tank in this water heater shall prove upon examination by (the warrantor) to have leaked during the warranty period in normal residential use, due to natural corrosion from potable water therein, the warrantor will furn...

  • Page 40

    40 copyright © 2013 a. O. Smith corporation. All rights reserved. 500 tennessee waltz parkway, ashland city, tn 37015 technicalsupport:800-527-1953•parts:800-433-2545•fax:800-644-9306 www.Hotwater.Com.