A.O. Smith GPS-75 Instruction Manual Download Page 1

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Thank you for buying this energy efficient water heater. We

appreciate your confidence in our products.
You should thoroughly read this manual before installation and/or

operation of this water heater. Please pay particular attention

to the important safety and operating instructions as well as the

WARNINGS and CAUTIONS.

Instruction Manual

PRINTED 1010

197209-003

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 UNSUCCESSFUL, PLEASE WRITE TO THE COMPANY LISTED ON THE RATING PLATE ON THE WATER HEATER.

resIdentIal Gas water heaters

•

for Your safety

•

AN ODORANT IS ADDED TO THE GAS USED

BY THIS WATER HEATER.

Gas Models power vent Gps-75

wIth hot surface IGnItIon

500 Tennessee Waltz Parkway

Ashland City, TN 37015

www.hotwater.com

Low Lead Content

Summary of Contents for GPS-75

Page 1: ... 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 UNSUCCESSFUL PLEASE WRITE TO THE COMPANY LISTED ON THE RATING PLATE ON THE WATER HEATER RESIDENTIAL GAS WATER HEATERS For Your Safety AN ODORANT IS ADDED TO TH...

Page 2: ...n the Act IMPORTANT DEFINITIONS Qualified Installer A qualified installer must have ability equivalent to a licensed tradesman in the fields of plumbing air supply venting and gas supply including a thorough understanding of the requirements of the National Fuel Gas Code as it relates to the installation of gas fired water heaters The qualified installer must also be familiar with the design featu...

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

Page 4: ...4 GENERAL SAFETY ...

Page 5: ...on and vent pipe installation are very important in preventing death from possible carbon monoxide poisoning and fires see Figures 1 and 2 Examine the location to ensure the water heater complies with the Locating the New Water Heater section in this manual 6 For California installation this water heater must be braced anchored or strapped to avoid falling or moving during an earthquake See instru...

Page 6: ...ntally vented gas fueled heating appli ance or equipment The sign shall read in print size no less than one half 1 2 inch in size GAS VENT DIRECTLY BELOW KEEP CLEAR OF ALL OBSTRUCTIONS INSPECTION The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation unless upon inspection the inspector observes carbon monoxide detectors and si...

Page 7: ... 1 800 433 2545 and provide complete model and serial numbers see rating plate quantity and name of part desired see Figure 1 Standard hardware items may be purchased locally O INLET DIP TUBE P TEMPERATURE AND PRESSURE RELIEF VALVE Q RATING PLATE R INSULATION S VENT TERMINAL T DRAIN VALVE U IGNITER AND MAIN BURNER V FLUE W METAL DRAIN PAN X GAS CONTROL THERMOSTAT Y CONTROL HARNESS Z MOTOR BLOWER A...

Page 8: ...thers These include the elderly children the infirm or physically mentally handicapped If anyone using hot water in your home fits into one of these groups or if there is a local code or state law requiring a certain temperature water at the hot water tap then you must take special precautions In addition to using the lowest possible temperature setting that satisfies your hot water needs a means ...

Page 9: ...s 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 prevented by a leak detector or water shut off device used in conjunction with a piped drain pan These devices are available from some plumbing supply wholesalers and retailers and detect and react to leakage in various ways Sensors mounted in the drain pan...

Page 10: ...components mentioned below see Figure 1 Failure to follow these instructions can restrict the air flow required for proper combustion potentially resulting in fire asphyxiation serious personal injury or death Do not apply insulation to the top of the water heater as this will interfere with safe operation of the blower assembly Do not cover the outer door thermostat or temperature pressure relief...

Page 11: ...rtical ducts each opening should have a minimum free area of 1 square inch per 4 000 Btu per hour 5 5 cm2 kW of total input rating of all equipment in the enclosure see Figure 8 3 When communicating with the outdoors through horizontal ducts each opening should have a minimum free area of 1 square inch per 2 000 Btu per hour 11 cm2 kW of total input rating of all equipment in the enclosure see Fig...

Page 12: ...e typical compounds which are potentially corrosive Do not store products of this sort near the heater Also air which is brought in contactwiththeheatershouldnotcontainanyofthesechemicals Ifnecessary uncontaminated air should be obtained from remote or outside sources The limited warranty is voided when failure of water heater is due to a corrosive atmosphere see limited warranty for complete term...

Page 13: ...n adequate floor drain or external to the building In cold climates it is recommended that it be terminated at an adequate drain inside the building Be certain that no contact is made with any live electrical part The discharge opening must not be blocked or reduced in size under any circumstances Excessive length over 30 feet 9 14 m or use of more than four elbows can cause restriction and reduce...

Page 14: ...water heater Use a soapy water solution not a match or open flame Rinse off soapy solution and wipe dry When installed at elevations above 7 700 feet 2 347 meters input rating should be reduced at the rate of 4 percent for each 1 000 feet 305 meters above sea level which requires replacement of the burner orifice in accordance with National Fuel Gas Code ANSI Z223 1 NFPA 54 Contact your local gas ...

Page 15: ...ater must flow from the hot water faucet before turning ON gas to the water heater To fill the water heater with water 1 Close the water heater drain valve by turning the handle to the right clockwise The drain valve is on the lower front of the water heater 2 Open the cold water supply valve to the water heater NOTE The cold water supply valve must be left open when the water heater is in use 3 T...

Page 16: ...able of venting the flue gases the equivalent of thirty 30 feet of 3 inch pipe or one hundred 100 feet of 4 inch pipe as listed in Table 1 TABLE 1 Number of 3 Maximum 4 Maximum 90 Elbows Pipe Feet Pipe Feet ONE 1 25 92 TWO 2 20 84 THREE 3 15 76 FOUR 4 10 68 FIVE 5 60 Minimum of one 1 elbow and 2 feet of straight pipe must be installed for 3 and 4 pipe NOTE The equivalent feet of pipe listed above ...

Page 17: ...ting instructions in this manual before completing the installation and putting the water heater into service NOTE A For water heaters in locations with high ambient temperatures above 100 F it is recommended that CPVC or ABS pipe and fittings be used B A 22 5 degree elbow 2 vent pipe or a 45 degree elbow 3 and 4 vent pipe with an installed screen VENT TERMINAL must be used in all cases CONDENSATE...

Page 18: ...section titled INSTALLATION OF VERTICAL VENT SYSTEM VENT TERMINAL INSTALLATION SIDEWALL 1 Install the vent terminal by using the cover plate as a template to mark the hole for the vent pipe to pass through the wall BEWARE OF CONCEALED WIRING AND PIPING INSIDE THE WALL 2 If the Vent Terminal is being installed on the outside of a finished wall it may be easier to mark both the inside and outside wa...

Page 19: ...CAUTION LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS OPERATION VERIFY PROPER OPERATION AFTER SERVICING FIGURE 17 POWER VENT WIRING SCHEMATIC ...

Page 20: ...N OF VERTICAL VENT SYSTEM A proper flashing or BOOT should be used to seal the pipe where it exits the roof The total vent system should not exceed the equivalent feet of pipe as listed in Table 1 Provide support for all pipe protruding through the roof All piping should be properly secured The vent system piping should be supported every 5 feet 1 5 m of vertical run and every 3 feet 91 cm of hori...

Page 21: ... respect to chemical resistance pressure rating temperature characteristics etc Insertion Tool Helpful for larger diameter pipe and fittings 6 inches 15 2 cm and 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 PVC or CPVC surfaces A chemical cleaner ...

Page 22: ... 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 prepares the PVC or CPVC for the solvent cementing step Move quickly and without hesitation to the cementing procedure while the surfaces are still wet with primer E Application of solvent cement Applyt...

Page 23: ...OTTER buttons together and holding for 1 second Then press the COOLER button until the WARM indicator light appears 2 Set the ON OFF switch on the blower control box to the OFF position 3 Turn off all electric power to the appliance if service is to be performed BEFORE OPERATING ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED FROM ALL LINES 1 STOP Read the safety information above on this l...

Page 24: ...w manufacturer s instructions for installation of the valves Before changing the factory setting on the thermostat read the Temperature Regulation section in this manual see Figure 20 Never allow small children to use a hot water tap or to draw their own bath water Never leave a child or handicapped person unattended in a bathtub or shower The water heater should be located in an area where the ge...

Page 25: ...concentration of sulfate in the supply water b Little or no dissolved oxygen in the water c A sulfate reducing bacteria which has accumulated within the water heater this harmless bacteria is nontoxic to humans d An excess of active hydrogen in the tank This is caused by the corrosion protective action of the anode Smellywatermaybeeliminatedorreducedinsomewaterheatermodels by replacing the anode s...

Page 26: ...E Contact a qualified installer or service agency to replace a flooded water heater Do not attempt to repair the unit It must be replaced At least once a year a visual inspection should be made of the main burner and the hot surface igniter assembly for proper flame characteristics and ignition sequences This can be done by removing the Outer Door and viewing the main burner operation through the ...

Page 27: ...ff the water supply and open a nearby hot water faucet to depressurize the water tank 3 Drain approximately 5 gallons of water from tank Refer to Draining and Flushing for proper procedures Close drain valve 4 Remove old anode rod 5 Use Teflon tape or approved pipe sealant on threads and install new anode rod 6 Turn on water supply and open nearby hot water faucet to purge air from water system Ch...

Page 28: ...oose 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 water lines or ground seepage should also be checked To check where threaded portion enters tank insert cotton swab between jacket opening and fitting If cotton is wet follow Draining instructions in th...

Page 29: ... need ever exist for repair parts or service simply contact the company it was purchased from or direct from the manufacturer listed on the rating plate on the water heater Be sure to provide all pertinent facts when you call or visit Selling prices will be furnished on request or parts will be shipped at prevailing prices and you will be billed accordingly The model number of your Gas Water Heate...

Page 30: ...r 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 there are no obstructions in the vent or intake air pipe 5 The gas control valve thermostat has detected an open igniter circuit 1 Check wiring to the hot surface igniter assembly replace igniter ass...

Page 31: ...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 i...

Page 32: ...32 These guidelines should be utilized by a qualified service agent TROUBLESHOOTING GUIDELINES TROUBLESHOOTING GUIDELINES ...

Page 33: ...33 NOTES ...

Page 34: ...34 NOTES ...

Page 35: ... parts will void this warranty SERVICE AND LABOR RESPONSIBILITY UNDER THIS LIMITED WARRANTY THE WARRANTOR WILL PROVIDE ONLY A REPLACEMENT WATER HEATER OR PART THEREOF THE OWNER IS RESPONSIBLE FOR ALL OTHER COSTS Such costs may include but are not limited to a Labor charges for service removal or reinstallation of the water heater or part thereof b Shipping and delivery charges for forwarding the n...

Page 36: ...36 500 Tennessee Waltz Parkway Ashland City TN 37015 www hotwater com ...

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