A.O. Smith GPS-75 Main Burner, High Temperature Limit Switch, Power Venter Maintenance, Draining

Page 15

PERFORMEDONLYBYAQUALIFIEDSERVICETECHNICIAN. READ THE GENERALSAFETY INFORMATION SECTION FIRST.

USERS OF THIS APPLIANCE SHOULD BE AWARE THAT GAS COMPONENTS WEAR OUT OVER A PERIOD OF TIME. THE GAS CARRYING COMPONENTS OF THIS APPLIANCE SHOULD BE INSPECTED FOR PROPER OPERATION PERIODICALLY BY A QUALIFIED SERVICE TECHNICIAN.

MAIN BURNER

Check main burner every 12 months for proper flame characteristics. This is done by removing door(s) on heater, fig.

1.The main burner should provide complete combustion of gas; ignite rapidly; give reasonably quiet operation; cause no excessive flame lifting from burner ports. Make sure that the flow of combustion and ventilation air is not blocked.

WARNING

Use appropriate caution when performing this inspection and do not put any part of your body immediately in front of the combustion chamber.

If proper flame characteristics are not evident, check for accumulation of lint or other foreign material that restricts or blocks the air openings in the heater or burner. Also check AIR REQUIREMENTS.

WARNING

SOOT BUILD-UP INDICATES A PROBLEM THAT REQUIRES CORRECTION BEFORE FURTHER USE. Consult with a qualified service technician.

Should the main burner or burner air openings require cleaning, turn the control switch to “OFF” position and allow the burner to cool. Remove the burner and clean with a soft brush. Clean main burner orifice with a suitable soft material.

HIGH TEMPERATURE LIMIT SWITCH

The thermostat has a single use built-in limit switch which will shut off gas to burner in case of excessive water temperatures. The thermostat must be replaced if the limit switch opens.

POWER VENTER MAINTENANCE

The water heater must be inspected quarterly. Points of inspection are:

1.MOTOR - Motor must rotate freely. This is a sealed motor and no oiling is required.

2.WHEEL - Wheel must be clean of soot, ash or any other coating which inhibits either rotation or air flow. Remove all foreign material from vent system before operating.

3.AIR SUPPLY BOX - Every month check operation and make sure nothing is blocking dilution air entrance.

4.The pressure switch part inside the power venter must be open and free from deposits of soot, carbon, etc.

For safety and satisfactory operation it is recommended that the heater be checked once a year by a competent service person.

FIGURE 11

VENTING SYSTEM

T & P VALVE

HAVE VENTING SYSTEM CHECKED EVERY SIX MONTHS FOR OBSTRUCTIONS AND/OR DETERIORATION IN VENT PIPING.

A.Insofar as is practical, close all doors, windows and air inlets to the building. Turn on all exhaust fans (range hood, bathroom exhaust, etc.) so they will operate at their maximum speed. Close fireplace dampers.

B.Turn water temperature adjusting knob to full, counterclockwise and open water faucet if necessary to keep burner in operation.

C.“CHECKING THE DRAFT.” Operate the water heater for several minutes and check to see if it is venting properly by passing a lit match or paper near the opening of the Air Mixing Box (See figure 11). If the draft is proper, the match flame will be drawn into the Air Mixing Box. If not, the combustion products will tend to extinguish the flame. If an improper draft exists, do not operate the water heater until proper adjustments or repairs are made to provide adequate draft through the gas vent.

D.Next, turn on all other fuel burning appliances within the same room so they will operate at their full input.

Repeat step C above.

At least once a year, the temperature and pressure relief valve must be checked to ensure that it is in operating condition. Lift the lever at the top of the valve several times until the valve seats properly and operates freely.

WARNING

THE WATER PASSING OUT OF THE VALVE DURING THIS CHECKING OPERATION MAY BE EXTREMELY HOT. AVOID CONTACT AND DISCHARGE SAFELY TO PREVENT WATER DAMAGE.

DRAINING

Periodically open the drain valve and allow the water to run until it flows clean. This will help prevent sediment build-up in the tank.

It is normal for lime and scale deposits to form within the tank and on the heat exchanger surfaces. Such deposits will not be removed by periodic draining. It is necessary to chemically delime the affected parts in water areas where such deposits are encountered. Contact your dealer or plumber for deliming information.

15

Page 14 Page 16
Image 15
Page 14 Page 16
Contents Residential GAS Water Heaters GET to Know Your Water Heater Replacement Parts and Deliming ProductsImproper Combustion External DamageChemical Vapor Corrosion Extended NON-USE PeriodsInstallation Water Connections Unconfined SpaceWater Potable Heating and Space Heating Confined SpaceRelief Valve Connection of GAS PipeVenting Vent Pipe TerminationPlanning the Vent System Condensate Installation of Vent SystemVent Terminal INSTALLATION, Sidewall Preparation of Blower AssemblyPower Vent Wiring Schematic Figure Initial Preparation Installation of Vent SYSTEM, SidewallInstallation of Vertical Vent System Vent Pipe PreparationApplicators Selection of MaterialsPrimer CementStep G OperationTo Operate the Heater Step EDo not TRY to Light the Burner by Hand What to do if YOU Smell GASTemperature Regulation MaintenanceVenting System High Temperature Limit SwitchPower Venter Maintenance Main BurnerCathodic PROTECTION-ANODE Trouble ShootingService and Repair CondensationTroubleshooting Water Heater Control LED Status Problem Solution Trouble Shooting GuideLimited Residential GAS Warranty Conditions and ExceptionsImportant Information Smith Water Products CO., INC

GPS-75 specifications

The A.O. Smith GPS-75 is a state-of-the-art gas water heater designed to deliver efficient and reliable hot water solutions to residential and light commercial users. With its sleek design and advanced technology, this unit stands out in the competitive water heating market.

One of the primary features of the GPS-75 is its impressive 75-gallon capacity, making it ideal for larger households or businesses that require a substantial volume of hot water. This water heater delivers a first-hour rating of up to 91 gallons, ensuring that you will always have enough hot water on demand, even during peak usage times.

The GPS-75 utilizes a high-efficiency gas burner that operates at an energy factor of 0.67, which helps to minimize energy costs while providing robust heating performance. This means that users can enjoy powerful hot water output without having to worry about skyrocketing energy bills. Additionally, the unit is equipped with a state-of-the-art electronic ignition system that ensures reliable startup and operation. This feature eliminates the need for a pilot light, enhancing safety and energy efficiency.

In terms of durability, the GPS-75 features a glass-lined interior which protects the tank from rust and corrosion. This adds to the unit's longevity and reduces the need for maintenance and replacement. The water heater also comes with insulating foam in the tank and a special temperature and pressure relief valve to enhance safety.

Another notable technology included in the GPS-75 is its advanced diagnostics feature. This system is designed to monitor and diagnose problems, allowing for quick troubleshooting and minimizing downtime. This is especially useful for service professionals and homeowners alike, as it facilitates efficient maintenance and reduces unexpected repair costs.

The GPS-75 also has an environmentally friendly design, meeting stringent energy efficiency guidelines. This aligns with the growing demand for sustainable solutions in modern homes and businesses.

In summary, the A.O. Smith GPS-75 gas water heater combines an impressive 75-gallon capacity, high efficiency, and advanced safety features to offer users a reliable and economical hot water solution. With its innovative technologies and durable construction, it stands as a strong contender in the water heating industry. Whether for residential or commercial use, the GPS-75 ensures that hot water is always available when needed.
Top Page Image Contents