A.O. Smith PHPT-80, 318257-000 Maintenance of Your Water Heater, Draining and Flushing

Page 14

MAINTENANCE OF YOUR WATER HEATER

Temperature and Pressure Relief Valve

WARNING

Explosion Hazard

If the temperature and pressure relief valve is dripping or leaking, have a qualified person replace it.

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

Do not plug valve. Do not remove valve.

Failure to follow these instructions can result in death or explosion.

Manually operate the temperature and pressure relief valve at least once a year to make sure it is working properly.

To prevent water

 

 

 

 

 

 

 

damage, the valve

Figure 11

must be properly

 

 

Temperature and Pressure

 

connected to a

 

 

Relief Valve

 

 

 

 

 

 

Manual Relief

 

 

 

 

 

 

discharge line which

 

 

 

 

 

 

Valve

terminates at an

 

 

 

 

 

 

 

 

 

 

 

 

 

 

adequate drain.

 

 

 

 

 

 

 

Standing clear of the

 

 

 

 

 

 

 

outlet (discharged

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

water may be

 

 

 

 

 

 

 

hot), slowly lift and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

release the lever

 

 

 

 

 

 

 

Discharge line to drain

handle on the

temperature and

 

 

 

 

 

 

 

pressure relief valve to allow the valve to operate freely and return to its closed position. If the valve fails to completely reset and continues to release water, immediately disconnect the electrical power, close the cold water inlet valve and call a qualified person.

Draining and Flushing

It is recommended that the tank be drained and flushed every 6 months to remove sediment which may build up during operation. The water heater should be drained if being shut down during freezing temperatures. To drain the tank, perform the following steps:

1.Place the water heater in Standby Mode by pressing the power button on the user interface module.

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

3.Open a nearby hot water faucet until the water is no longer hot.

4.Close the cold water inlet valve.

5.Connect a hose to the drain valve and terminate it to an adequate drain or external to the building.

6.Open the water heater drain valve and allow all of the water to drain from the tank. Flush the tank with water as needed to remove sediment.

7.Close the drain valve, refill the tank (open the cold water inlet valve), and restart the heater as directed in this manual.

IMPORTANT: Do not turn on power to the water heater unless it is completely filled with water. To ensure that the tank is full, open a hot water faucet and allow the water to run until the air is purged and the water flows uninterrupted from the faucet.

8.Press the power button to turn the water heater on. NOTE: The water heater will conduct a system diagnostic prior to operation.

If the water heater is going to be shut down for an extended period, the drain valve should be left open.

Heating Element Replacement

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.

Replacement heating elements must be of the same style and voltage/wattage rating as the ones originally in the water heater. This information can be found on the flange or terminal block of the element or on the water heater data plate.

IMPORTANT: Before replacing any element confirm that you have the correct replacement element (wattage). This water heater has a 4500 watt upper element and a 2000 watt lower element. DO NOT replace the element(s) with a wattage different than the ones specified for the upper and/ or lower element.

IMPORTANT: Using an element greater than 2000 watts in place of the lower element will damage the water heater and void the warranty.

1.Press the power button on the user interface module to place the water heater in Standby Mode.

2.Turn off the power to the water heater.

3.Drain the water heater as directed in the “Draining and Flushing” section.

14

Page 13 Page 15
Image 14
Page 13 Page 15
Contents Installation Instructions Use & Care Guide Water Heater Safety Your safety and the safety of others are very importantConsumer Responsibilities Installing Your Water HeaterConsumer Information 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 Water Heater Location Installation ChecklistPost Installation Review Water System PipingOperating Your Water Heater Before UsingWater Temperature Regulation Operating Mode Descriptions Adjusting the User Interface Module/Operational ModesWater Temperature Adjustment Other ControlsWater Heater Sounds Powered Anode OperationOperational Conditions StackingDraining and Flushing Maintenance of Your Water HeaterHeating Element Replacement Air Filter Cleaning/Replacement Cleaning the Heat PumpRoutine Preventive Maintenance 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.
Top Page Image Contents