Temperature Regulation; Maintenance - A.O. Smith BTX-80 Operation Manual

TEMPERATURE REGULATION

THIS WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE
THERMOSTAT TO CONTROL WATER TEMPERATURE. HOT
WATER TEMPERATURES REQUIRED FOR AUTOMATIC
DISHWASHER AND LAUNDRY USE CAN CAUSE PAINFUL
SCALDING WITH POSSIBLE SERIOUS AND PERMANENT
INJURY. THE TEMPERATURE AT WHICH INJURY OCCURS
VARIES WITH THE PERSON'S AGE AND THE TIME OF
EXPOSURE. THE SLOWER RESPONSE TIME OF
CHILDREN, AGED OR DISABLED PERSONS INCREASES
THE HAZARDS 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.
THE WATER HEATER SHOULD BE LOCATED IN AN AREA
WHERE THE GENERAL PUBLIC DOES NOT HAVE ACCESS.
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 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. The water temperature adjustment was factory set at
the lowest temperature. Pressing the "COOLER"
decreases temperature and pressing the "HOTTER"
increases the temperature.
SETTING THE WATER HEATER TEMPERATURE AT 120°F
(APPROX. " " MARK ON TEMPERATURE SETTING OF
CONTROL) WILL REDUCE THE RISK OF SCALDS.
states require settings at specific lower temperatures.
Figure 14 shows the approximate water temperatures
produced at various thermostat settings. Short repeated
heating cycles caused by small hot water uses can cause
temperatures at the point of use to exceed the thermostat
setting by up to 20°F. If you experience this type of use you
should consider using lower temperature settings to reduce
scald hazards.
Valves for reducing the point-of-use temperature by mixing
cold and hot water are available. See figure 2. Also available
are inexpensive devices that attach to faucets to limit hot water
temperatures. Contact a licensed plumber or the local
plumbing authority.
To avoid any unintentional changes in water temperature
settings, the control has a tamper resistant feature for
changing the temperature setting. To change the temperature
setting follow these instructions:
CAUTION
1. "Wake Up" the temperature indicators by holding down both
the "COOLER" and "HOTTER" temperature adjustment
buttons at the same time for one second (see Figure 14).
One or two of the temperature indicators will light up.
These indicators will only remain on for 30 seconds if no
further buttons are pressed. After 30 seconds the control
will go back to "Sleep" mode.
2. Release both of the temperature adjustment buttons.
A. To decrease the temperature press and release the
"COOLER" button until desired setting is reached.
B. To increase the temperature press and release the
"HOTTER" button until the desired setting is reached.
NOTE: Holding down the button will not continue to lower or
raise the temperature setting. The button must be pressed
and released for each temperature change desired.
SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL
TO SHUT OFF, TURN OFF THE MAIN MANUAL GAS SHUTOFF
VALVE TO THE APPLIANCE. SEE FIGURE 1 (G).
TEMPERATURE INDICATORS
button
button
TEMPERATURE ADJUSTMENT BUTTONS
Some
Temperature Setting
F = approx. 180°F (82°C)
E = approx. 170°F (77°C)
D = approx. 160°F (71°C)
C = approx. 150°F (65°C)
B = approx. 140°F (60°C)
B = approx. 130°F (54°C)
= approx. 120°F (49°C)
DISCONNECT FROM ELECTRICAL SUPPLY BEFORE
SERVICING UNIT. FOR YOUR SAFETY, WATER HEATER
18
Time to Produce
2nd & 3rd Degree
Display
Burns on Adult Skin
B C D E F
Nearly Instantaneous
Nearly Instantaneous
About 1/2 Second
About 1 1/2 Seconds
Less than 5 Seconds
More than 30 Seconds
More than 5 Minutes
FIGURE 14

MAINTENANCE

CAUTION