Temperature Settings; Filling; Thermostat Adjustment - A.O. Smith AOSRE50100 Owner's Manual

POINT OF USE WATER HEATER
OPERATION
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
THE WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE THERMOSTAT
TO CONTROL WATER TEMPERATURE. HOT WATER AT TEMPERATURES
DESIRED FOR AUTOMATIC DISHWASHER AND LAUNDRY USE CAN
CAUSE SCALDS RESULTING IN SERIOUS PERSONAL INJURY AND/OR
DEATH. THE TEMPERATURE AT WHICH INJURY OCCURS VARIES WITH
THE PERSON'S AGE AND TIME OF EXPOSURE. THE SLOWER RESPONSE
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
CHILD OR DISABLED PERSON UNATTENDED IN A BATHTUB OR SHOWER.
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.
KEEPING THE THERMOSTAT SETTING AT 120°F WILL REDUCE THE RISK
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
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.
CAUTION
).
DANGER
WARNING
The thermostat is factory set at "LO" which is approximately 120° F to
reduce the risk of scald injury.
ADJUSTABLE THERMOSTAT

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.
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,
SERIOUS BODILY INJURY, OR PROPERTY DAMAGE.
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 (
temperature, or counter clockwise (
temperatures.
4. Fold the insulation back in place and replace the access panel.
5. Turn "ON" the power supply.
9
FIGURE 11
WARNING
) to increase the
) to decrease the