A.O. Smith GPDH, GPDX, GPDT Venting Through a Roof, Wiring, Elbows, Connecting Vent to Blower

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wall will help minimize discoloration of the wall. Note that the inside flue mounting adaptors must be slipped over the vent piping before locating the pipe through the wall. Before securing the inside and outside collars to the wall, use a silicone sealer between pipe and opening to insure a water and air tight seal.

INSTALLATION SHOWING USE OF PVC, ABS OR CPVC PIPE FOR INLET AND OUTLET VENT PIPE.

(50 Gal. (189.3 L) Hi BTU input & all 75 Gal. (283.9 L) Models only) is supplied on certain models only. (More may be required and must be supplied locally).

1.The water heater requires its own (separate) venting system.

2.Only 3" ABS Schedule 40 piping and fittings are acceptable materials on the first 5' (1.52 m) of the outlet vent system for some 50 Gal. (189.3 L) and 75 Gal. (283.9 L) models.

3.3" PVC, ABS, or CPVC Schedule 40 piping and fittings are acceptable materials for the inlet vent system and for the outlet vent system (after the first 5' (1.52 m) for 50 Gal. (189.3 L) Hi BTU input and 75 Gal. (283.9 L) Models only).

4.It cannot be connected to existing vent piping or chimney.

5.It must terminate vertically to the outdoors.

6.The total vertical and horizontal runs cannot exceed the maximum length with a maximum number of 90° elbows as specified in the table below. If more elbows are required, the venting distance must be reduced 5' (1.52 m) for every 90° elbow.

3" DIA. VENTS

NUMBER OF 90° DEG.

MAX. LENGTH (FT.)

ELBOWS*

45 (13.72 m)

1

40 (12.2 m)

2

35 (10.7 m)

3

*NOTE: Two 45° elbows are equivalent to one 90° elbow. One 90° elbow equals 5' (1.52 m) of equivalent vent length.

FIGURE 20.

CONNECTING VENT TO BLOWER

1.If making an immediate horizontal run of vent off the blower, one 3" PVC inlet and one 3" PVC (ABS for 50 Gal. (189.3 L) and 75 Gal.(283.9 L) Models) outlet Schedule 40 street elbows are required. Place the elbow in the required direction on the blower and using three sheet metal screws, attach the elbow.

FIGURE 21.

2.If there is to be a vertical run from the blower, the 3" PVC inlet and the 3" PVC (ABS for 50 Gal. (189.3 L) and 75 Gal.(283.9 L) Models) outlet Schedule 40 pipe must be attached to the blower and venting hood, using six sheet metal screws.

FIGURE 23.

FIGURE 22.

VENTING THROUGH A ROOF

Two 3" inlet and outlet PVC Schedule 40-45° vent caps are supplied.

A 5' (1.52 m) section of 3" ABS Schedule 40 outlet vent pipe

WIRING

DANGER

DO NOT USE AN EXTENSION CORD. IF THERE IS NOT A SUITABLE RECEPTACLE AND/OR LOCAL CODES PROHIBIT USE OF A POWER CORD, FIELD WIRING MUST BE PROVIDED. THE APPLIANCE, WHEN INSTALLED, MUST BE ELECTRICALLY

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Contents Residential With HOT Surface Ignition Replacement Parts and Deliming ProductsGAS Model Extended NON-USE Periods External DamageChemical Vapor Corrosion Insulation BlanketsWater Connections Location of HeaterWater Potable Heating Space Heating GAS Connections Closed Water SystemVenting Combustion AIR and Exhaust Venting Through an Outside Wall ClearancesVenting Through AN Outside Wall Wire FenceVenting Through Roof Clearances Vent piping can be installed as follows Venting System Example Installation For ALL ModelsDIA. Vents Number of 90 DEG Cementing PVC, ABS or Cpvc Pipe and Fittings Approximate Setting Time for 2-1/2 to 4 Pipe JointsVent Pipe Separation Movement Complete Joint SETVenting Through a Roof WiringConnecting Vent to Blower ElbowsOptional Field Installed Wiring What to do if YOU Smell GAS Do not TRY to Light the Burner by HandTemperature Regulation FillingWater Heating Ignition Sequence High Altitude InstallationVenting Manual Reset Switch Control Sequence HOT Surface Direct IgnitionMain Burner High Temperature Limit SwitchPower Venter Maintenance Venting SystemService and Repair Thermostat and GAS Supply CheckTrouble Shooting Water Heater Control LED Status Problem SolutionYellow Flame HOT WaterVent Pipe TOO HOT CondensationLimited Residential GAS Warranty Southeast Parkway FRANKLIN, TN

GPDT, GPDH, GPDX specifications

A.O. Smith is a renowned leader in the manufacturing of water heating solutions, and its series of gas water heaters, including the GPDT, GPDH, and GPDX models, are emblematic of the company’s commitment to innovation, efficiency, and reliability.

The A.O. Smith GPDT series is characterized by its high energy efficiency and robust design. With a 40-gallon capacity, it utilizes a 0.67 energy factor, making it an ideal choice for both residential and light commercial applications. This model features a unique combustion system that minimizes emissions while maximizing hot water output. Equipped with a powered draft system, the GPDT series effectively vents combustion gases, improving air quality and lowering operational costs.

In contrast, the GPDH series is particularly notable for its compatibility with high-efficiency gas appliances. It employs a direct vent system, allowing for versatile installation options. The GPDH models also include advanced diagnostics and a LED display that simplifies monitoring and maintenance. With an enhanced insulation design, these heaters minimize heat loss, effectively optimizing performance and energy savings.

The GPDX series capitalizes on cutting-edge technologies to provide superior performance. With capacities ranging from 30 to 50 gallons, these water heaters are designed to meet varying needs. The GPDX is equipped with a dual-purpose valve that offers superior temperature control and safety features, ensuring user convenience and peace of mind. Its intuitive interface allows users to easily set their desired water temperature and monitor performance metrics.

One of the key characteristics that unify the GPDT, GPDH, and GPDX models is their commitment to durability. A.O. Smith incorporates high-quality materials and innovative engineering processes to enhance the longevity of their products. Each model features an impressive warranty, demonstrating the company’s confidence in their craftsmanship.

In conclusion, A.O. Smith's GPDT, GPDH, and GPDX gas water heater series offer a blend of efficiency, performance, and innovation. These models are equipped with advanced technologies designed to provide users with reliable hot water solutions while minimizing energy consumption. With their robust build, user-friendly features, and impressive warranties, A.O. Smith continues to be a top choice for those seeking dependable gas water heating solutions.
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