Installing Your Water Heater

Consumer Information

This water heater should be installed in accordance with the local code authority having jurisdiction, the power company or electric utility, and this installation manual. In the absence of local code requirements, follow the regulations set forth in the latest edition of The National Electric Code, NFPA 70. This is available from the following:

National Fire Protection Association 1 Batterymarch Park

Quincy, MA 02269

American National Standards Institute 1430 Broadway

New York, NY 10018

Check your phone listings for the local authorities having jurisdiction over your installation.

Consumer Responsibilities

This manual has been prepared to acquaint you with the installation, operation and maintenance of your electric heat pump water heater and to provide important safety information in these areas.

We urge you to read all of the instructions thoroughly before attempting the installation or operation of this water heater. This manual should be kept for future reference.

the water while the electric elements only function during high demand periods. (See “Adjusting the User Interface Module/ Operational Mode” section). The more often the unit operates using the heat pump, rather than the elements, the more efﬁcient the unit will be.

The 80-gallon tank capacity of this water heater is intended to take optimal advantage of the heat pump’s capability to heat water for large families or those having higher than normal hot water requirements. This high capacity will enable the unit to operate in the maximum efﬁciency mode more often than other models having lower capacity.

The HPWH uses about half the electricity of a comparably sized conventional electric water heater when operating in the Efﬁciency Mode, and provides up to ½ ton cooling capacity and dehumidiﬁcation. It is designed for indoor, residential applications for installation in a basement, garage or utility room (See “Location Requirements” section).

Figure 1

Heat Pump Water Heater Basic Operation

Ambient Air

Cool/Dehumidified Air

Heat Pump (Transfers heat from ambient air to Heat Exchanger)

The manufacturer of this water heater will not be liable for any damages caused by failure to comply with the installation and operating instructions outlined in this manual.

If you lack the necessary skills required to properly install this water heater or you have difﬁculty following the directions, you should not proceed but have a qualiﬁed person perform the installation of this water heater.

Examples of a qualified person include: licensed plumbers, authorized electric company personnel, and authorized service personnel.

Massachusetts code requires this water heater to be installed in accordance with Massachusetts 248-CMR 2.00: State Plumbing Code and 248-CMR 5.00.

Upper Element

(4500 Watt)

Lower Element

(2000 Watt)

Water Tank

Jacket

Heat Exchanger (Heat Transfer Coils)

A data plate identifying your water heater can be found adjacent to the upper element door. When referring to your water heater always have the information listed on the data plate readily available, to include the model and serial number. Retain your original receipt as proof of purchase.

Basic Operation Fundamentals

The Heat Pump Water Heater (HPWH) is an integrated heat pump water heater unit, having an 850 watt compressor and external coil heat exchanger with backup electric elements (See Figure 1). When in Efﬁciency Mode the heat pump draws heat from the ambient air in the room and transfers it to the water in the tank through the coil heat exchanger. While in Electric Mode the water heater functions like a standard electric water heater, relying on the electric elements to heat the water. A Hybrid Mode is available that relies primarily on the heat pump to heat

Unpacking the Water Heater

WARNING

Excessive Weight Hazard

Use two or more people to move and install water heater.

Failure to do so can result in back or other injury.

Removing Packaging Materials

IMPORTANT: Do not remove, cover or deface any permanent instructions, labels, or the data label from either the outside of the water heater or on the inside of water heater panels.

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.