A.O. Smith BTP-140-140 thru 600-2500, COF Features, Installation Instructions, Required Ability

Note: Some gas utility companies derate the heating value of the supplied gas at high elevations. Your authorized A.O. Smith Start- Up Agent must adjust for actual heating valve of the gas at the time of start-up.

FEATURES

WATER TEMPERATURE CONTROL

WARNING

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 SCALD BURNS 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 DISABLED PERSONS INCREASES THE HAZARDS TO THEM. NEVER ALLOW SMALL CHILDREN TO USE 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 TO SET TEMPERATURES.

SETTING THE WATER HEATER TEMPERATURE AT 120°F WILL REDUCE THE RISK OF SCALDS. Some states or provinces require settings at specific lower temperatures.

Below you will find listed the appropriate time-to-burn relationship for normal adult skin. 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.

Temperature	Time to Produce 2nd & 3rd
Setting	Degree Burns on Adult Skin
180°F (82°C)	Nearly Instantaneous
170°F (77°C)	Nearly Instantaneous
160°F (71°C)	About 1/2 Second
150°F (65°C)	About 1-1/2 Seconds
140°F (60°C)	Less than 5 Seconds
130°F (54°C)	About 30 Seconds
120°F (49°C)	More than 5 Minutes

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.

The water temperature is controlled by two thermostats. One thermostat is located near the top of the tank and the other is in the lower part of the tank. The upper thermostat must be set at least 5°F higher than the lower thermostat. In the case where the water heater has electronic thermostats, this differential has been factory set and cannot be changed.

The thermostat temperature dials are accessible by opening the control compartment cover.

FIGURE 1

A high limit switch interrupts the power burner operation should the water temperature reach 200°F.

The high limit switch must be manually reset by depressing the red button on the front of the control when water temperature drops to about 180°F. The manual reset high limit can be found inside the control compartment.

INSTALLATION INSTRUCTIONS

REQUIRED ABILITY

INSTALLATION OR SERVICE OF THIS WATER HEATER IS REQUIRED TO BE PERFORMED BY AN AUTHORIZED A.O. SMITH STARTUP AGENT. PLUMBING, AIR SUPPLY, VENTING, GAS SUPPLY AND ELECTRICAL WORK ARE REQUIRED.

UNCRATING

The heater should be moved in the crate as close as possible to the installation site. Depending upon size, shipping weights range from about 1,300 to 4,500 pounds.

The installer should be guided by the instructions furnished with the heater, local codes and utility company requirements. Preference should be given to codes and requirements where they differ from the heater furnished instructions.

Additional publications, which should guide the installer, include:

The latest version of the National Fuel Gas Code, ANSI Z223.1, from American Gas Association Laboratories, 8501 East Pleasant Valley Road, Cleveland, OH 44131.

In Canada – CGA No. B149 (latest version), from Canadian Gas Association Laboratories, 55 Scarsdale Road, Don Mills, Ontario, Canada M3B 2R3.

Code for the installation of Heat Producing Appliances (latest version), from American Insurance Association, 85 John Street, New York, NY 11038.

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