A.O. Smith PHPT-80, 318257-000 installation instructions Electrical Requirements

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Figure 6

T&P Relief Valve Insulation

T&P Relief Valve Insulation

Manual Relief Lever

T&P Relief Valve

T&P Relief Valve

Drain Line

4.Locate the hot water (outlet) & cold water (inlet) pipes to the water heater.

5.Locate the slit running the length of a section of pipe insulation.

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 that the base of the insulation is flush with the water heater. Once seated, secure the insulation with duct tape, electrical tape, or equivalent.

7.Repeat steps 5 and 6 for the hot water (outlet) pipe.

8.Add additional sections of pipe insulation as needed.

Electrical Requirements

WARNING

Electric Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

WARNING

Fire Hazard

Use 10 gauge solid copper wire.

Use a UL listed or

CSA approved strain relief.

Connect ground wire to green ground wire.

Failure to do so can result in death, fire, or electrical shock.

If you lack the necessary skills required to properly install the electrical wiring to this water heater, do not proceed but have a qualified electrician perform the installation.

When making the electrical connections, always make sure:

•The electrical service provides 240 VAC to the water heater for proper operation. DO NOT use 208 VAC.

•Wire sizes and connections comply with all applicable codes or in the absence of local or state codes follow NFPA-70, the National Electrical Code-current edition.

•Wiring enclosed in approved conduit (if required by local codes).

•The water heater and electrical supply are properly grounded.

•The electrical supply has the proper overload fuse or

breaker protection.

Figures 8A & 9 are provided as reference drawings. Always reference the wiring diagram located on the water heater for the correct electrical connections and connect the electrical supply to the water heater in accordance with local utility requirements and codes.

When installing the electrical wiring to the water heater:

1.Although this water heater is equipped with “Dry Fire” protection circuitry, be sure tank is completely filled with water, and all air is purged from the tank before making any electrical connections. See “Draining and Flushing Section”.

2.Turn off power to the electrical wiring for the water heater at the circuit breaker/fuse box.

3.Remove the left louvered access panel (when facing the water heater) by loosening the screws securing it to the water heater.

4.Loosen the screws securing the electrical junction box

Figure 7

Louvered Panel

cover to the water heater and set aside.

5.Connect the electrical supply to the water heater.

A standard 1/2 inch opening has been made in the junction box for conduit connections.

6.Connect ground wire to green ground wire in the electrical junction box of the water heater.

7.Reinstall the junction box cover.

8.Reattach the left louvered access panel to the water heater and secure it using the screws loosened earlier.

9.Turn on electrical power to the water heater.

10.Press the power button to turn the water heater on, then press the Efficiency button to set the operating mode. NOTE: The water heater will conduct a system diagnostic (approximately 8 minutes) prior to returning to operation.

11.Once the diagnostic sequence has finished, the fan should turn on.

NOTE: The heat pump’s fan will not turn on if the incoming water temperature is less than 59 °F and/or the ambient air temperature is above 109 °F or below 45 °F. Should the internal diagnostics detect a problem with the heat pump, an error message will be displayed.

12.Set the operational mode. For standard installation, the Hybrid Mode offers the best combination of efficiency and hot water delivery. For detailed descriptions of all operational modes see “Adjusting the User Interface Module/Operational Modes” section.

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Contents Installation Instructions Use & Care Guide Water Heater Safety Your safety and the safety of others are very importantInstalling Your Water Heater Consumer InformationConsumer Responsibilities Basic Operation FundamentalsLocation Requirements Site locationPiping Installation Water System PipingCondensate Drain Line Installation Closed System/Thermal ExpansionTemperature and Pressure Relief Valve Temperature & Pressure Relief ValveElectrical Requirements Insulation Blankets Connecting the Condensate Pump Overflow Shut Off SwitchPress the power button to turn the water heater on Installation Checklist Post Installation ReviewWater Heater Location Water System PipingOperating Your Water Heater Before UsingWater Temperature Regulation Adjusting the User Interface Module/Operational Modes Water Temperature AdjustmentOperating Mode Descriptions Other ControlsPowered Anode Operation Operational ConditionsWater Heater Sounds StackingDraining and Flushing Maintenance of Your Water HeaterHeating Element Replacement Cleaning the Heat Pump Routine Preventive MaintenanceAir Filter Cleaning/Replacement Replace the foam blocks and access coversDiagnostic Codes Display Shows IndicatesTroubleshooting Chart Problem Possible CausesRepair Part Illustration Page Copyright 2010 A.O. Smith Corporation. All rights reserved

318257-000, PHPT-80 specifications

The A.O. Smith PHPT-80,318257-000 is a highly efficient water heater designed to meet the needs of both residential and commercial applications. This unit features a capacity of 80 gallons, making it suitable for larger households and businesses requiring a significant supply of hot water. The PHPT-80 stands out for its innovative technologies, versatility, and durability.

One of the key features of the PHPT-80 is its high energy efficiency. This model utilizes advanced insulation technology that minimizes heat loss, making it an excellent choice for energy-conscious consumers. In addition, the heater is equipped with a powerful and efficient heating element that ensures rapid recovery times, allowing for a continuous supply of hot water even during peak usage periods.

The PHPT-80 also incorporates a user-friendly digital display that provides real-time information about the unit's performance. This feature enables users to monitor water temperature settings, energy usage, and maintenance alerts, enhancing convenience and ensuring optimal operation. Furthermore, the heater includes a self-diagnostic system that assists in troubleshooting and ensures that the system runs smoothly.

Safety is another critical aspect of the design of the A.O. Smith PHPT-80. It includes a comprehensive set of safety features such as a temperature and pressure relief valve, an over-temperature protection system, and a flame arrestor. These features help minimize the risk of accidents and ensure peace of mind for users.

Constructed with high-quality materials, the PHPT-80 boasts durability and longevity. Its tank is lined with a corrosion-resistant coating and insulated to protect against external elements and prolong its lifespan. Additionally, it features a robust commercial-grade thermostat that allows for precise temperature control.

A.O. Smith's commitment to sustainability is also reflected in the PHPT-80. The unit is designed to be eco-friendly, contributing to lower utility bills and reduced environmental impact. The heater complies with stringent industry standards, making it a responsible choice for consumers looking to reduce their carbon footprint.

With its blend of energy efficiency, advanced technology, user-friendly features, and robust safety mechanisms, the A.O. Smith PHPT-80,318257-000 water heater represents a reliable solution for those in need of a high-capacity hot water supply. Whether for residential or commercial use, this model delivers exceptional performance and reliability, making it a top choice among water heater options.
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