14
PURGING
Gas line purging is required with new piping or systems in which air has
entered.
CAUTION
PURGING SHOULD BE PERFORMED BY PERSONS EXPERIENCED IN THIS
TYPE OF GAS SERVICE. TO AVOID RISK OF FIRE OR EXPLOSION,
PURGE DISCHARGE MUST NOT ENTER CONFINED AREAS OR SPACES
WHERE IGNITION CAN OCCUR. THE AREA MUST BE WELL VENTILATED
AND ALL SOURCES OF IGNITION MUST BE INACTIVATED OR REMOVED.
CAUTION
THE "ON/OFF" SWITCH ON THE CONTROL BOX SHOULD NOT BE TURNED
TO THE "OFF" POSITION UNLESS THE UNIT IS BEING SERVICED.
TEMPERATURE REGULATION
DANGER
THIS WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE THERMOSTAT
TO CONTROL WATER TEMPERATURE. HOT WATER TEMPERATURES
REQUIRED FOR AUTOMATIC DISHWASHING 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 THE 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. IF A SUITABLE AREA IS
NOT AVAILABLE, A COVER SHOULD BE INSTALLED OVER THE
THERMOSTAT TO PREVENT TAMPERING. Suitable covers are available
through A.O. Smith Water Products Company, 5621 W. 115th Street, Alsip,
IL 60803.
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 dial be set for the lowest temperature that satisfies your
hot water needs. This will also provide the most energy efficient
operation of the water heater. The water temperature adjusting dial
was factory set at the lowest temperature; all the way counterclockwise
to the mechanical stop. Turning the dial counterclockwise
decreases
temperature and clockwise
increases temperature.
SETTING THE WATER HEATER TEMPERATURE AT 120°F (49°C) (APPROX.
"HOT" MARK ON FACE OF THE TEMPERATURE ADJUSTING DIAL) WILL
REDUCE THE RISK OF SCALDS.
Some states require settings at specific
lower temperatures.
Figure 10 shows the approximate water temperatures produced at
various thermostat dial 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 (11°C). If you experience
this type of use you should consider using lower temperature settings
to reduce scald hazards.
Valves for reducing point of use temperature by mixing cold and hot
water are available. Also available are inexpensive devices that attach
to faucets to limit hot water temperatures. Contact a licensed plumber or
the local plumbing authority.
Time to Produce 2nd & 3rd
Temperature Setting
Degree Burns on Adult Skin
VERY HOT = APPROX.180°F (82°C)
Almost Instantaneously
C = APPROX.162°F (72°C)
About 1/2 Second
B = APPROX. 145°F (63°C)
About 3 Seconds
A = APPROX. 130°F (54°C)
More than 30 Seconds
HOT = APPROX.120°F (49°C)
More than 5 Minutes
LOW = approx.80°F (27°C)
No Hazard
FIGURE 10
MAINTENANCE
CAUTION
DISCONNECT FROM ELECTRICAL SUPPLY BEFORE SERVICING UNIT.
FOR YOUR SAFETY, WATER HEATER SERVICE SHOULD BE PERFORMED
ONLY BY A QUALIFIED SERVICE TECHNICIAN. READ THE GENERAL
SAFETY INFORMATION SECTION FIRST.
USERS OF THIS APPLIANCE SHOULD BE AWARE THAT GAS
COMPONENTS WEAR OUT OVER A PERIOD OF TIME. THE GAS
CARRYING COMPONENTS OF THIS APPLIANCE SHOULD BE INSPECTED
FOR PROPER OPERATION PERIODICALLY BY A QUALIFIED SERVICE
TECHNICIAN.
MAIN BURNER
Check main burner every 12 months for proper flame characteristics.
This is done by removing door(s) on heater. The main burner should
provide complete combustion of gas; ignite rapidly; give reasonable quiet
operation; cause no excessive flame lifting from burner ports. Make
sure that the flow of combustion and ventilation air is not blocked.
If proper flame characteristics are not evident, check for accumulation
of lint or other foreign material that restricts or blocks the air openings in
the heater or burner. Also check AIR REQUIREMENTS.
WARNING
SOOT BUILD-UP INDICATES A PROBLEM THAT REQUIRES CORRECTION
BEFORE FURTHER USE. Consult with a qualified service technician.
Should the main burner or burner air openings require cleaning, turn the
control switch to “OFF” position and allow the burner to cool. Remove
the burner and clean with a soft brush. Clean main burner orifice with a
suitable soft material.
WATER TEMPERATURE
ADJUSTING DIAL
