A.O. Smith AOSRE50100 Point of USE Water Heater Operation, Thermostats, Temperature Settings

POINT OF USE WATER HEATER

OPERATION

CAUTION

NEVER OPERATE THE HEATER WITH THE COLD WATER INLET VALVE CLOSED OR WITHOUT FILLING WITH WATER PER THE FILLING INSTRUCTIONS. FAILURE TO DO SO WILL CAUSE DAMAGE AND CAN VOID ELEMENT WARRANTY.

FILLING

1.Close the water heater drain valve. (Turn clockwise ).

2.Open a nearby hot water faucet to permit air to escape.

3.Fully open the cold water inlet valve, filling the heater and piping.

4.Close the hot water faucet when water flows.

5.Turn the water heater electrical switch on.

TEMPERATURE REGULATION

DANGER

THEWATERHEATERISEQUIPPEDWITHANADJUSTABLETHERMOSTAT TOCONTROLWATERTEMPERATURE. HOTWATERATTEMPERATURES DESIRED FOR AUTOMATIC DISHWASHER AND LAUNDRY USE CAN CAUSE SCALDS RESULTING IN SERIOUS PERSONAL INJURY AND/OR DEATH. THETEMPERATUREATWHICHINJURYOCCURSVARIESWITH THEPERSON’SAGEANDTIMEOFEXPOSURE. THESLOWERRESPONSE TIME OF CHILDREN, AGED OR DISABLED PERSONS INCREASES THE HAZARD TO THEM. NEVER ALLOW SMALL CHILDREN TO USE A HOT WATER TAP, OR TO DRAW THEIR OWN BATH WATER. NEVER LEAVE A CHILDORDISABLEDPERSONUNATTENDEDINABATHTUBORSHOWER.

It is recommended that lower water temperatures be used to avoid the risk of scalding. It is further recommended, in all cases, that the water temperature thermostat (see Figure 11) be set for the lowest temperature which satisfies your hot water needs. This will also provide the most energy efficient operation of the water heater. Thermostat(s) are factory set at 120°F (49°C) unless specified differently by state requirements.

KEEPINGTHETHERMOSTATSETTINGAT120°FWILLREDUCETHERISK OF SCALDS.

Figure 4, Page 5 shows the approximate time-to-burn relationship for normal adult skin. The thermostats on your water heater have a linear relationship between degrees of angular rotation and the corresponding change in temperature. Thus rotating the temperature adjustment indicator 30 angular degrees will result in a 10 degree Fahrenheit change in water temperature.

THERMOSTATS

WARNING

This special thermostat with Hi-Temp Limit Switch (Part No. 900239-4) can only be used with this water heater. Do not use any other thermostat with Hi-Temp Limit Switch.

The thermostat is factory set at "LO" which is approximately 120° F to reduce the risk of scald injury.

ADJUSTABLE THERMOSTAT

FIGURE11

TEMPERATURE SETTINGS

Read all warnings in this manual and on the water heater before proceeding.

LO - Setting, approximately 120° F is recommended for all applications to reduce the risk of scald injury.

HI - Is a setting for the maximum temperature (approximately 140° F), which can be supplied by the water heater. The temperature dial should be kept at a lower setting whenever possible.

NOTE: Water temperature range of 120° F - 140° F recommended by most dishwasher manufacturers.

THERMOSTAT ADJUSTMENT

The thermostat is adjustable if a different water temperature is desired. Read all warnings in the "TEMPERATURE REGULATION" section before proceeding.

To adjust the temperature setting;

1. Turn "OFF" the electrical power to the water heater at junction box.

WARNING

HAZARD OF ELECTRICAL SHOCK! Before removing any access panels or servicing the water heater, make sure the electrical supply to the water heater is turned "OFF". Failure to do this could result in DEATH, SERIOUSBODILYINJURY,ORPROPERTYDAMAGE.

2.Take "OFF" the access panel and fold away the insulation. Do not remove the plastic personal protector covering the thermostat.

3.Turn the water temperature dial clockwise () to increase the temperature, or counter clockwise () to decrease the temperatures.

4.Fold the insulation back in place and replace the access panel.

5.Turn "ON" the power supply.

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