A.O. Smith 650A, 740A, BTP(V)-540A warranty Extended NON-USE Periods, Features

and sodium chloride (water softener salt), waxes, and process chemicals are typical compounds which are potentially corrosive. Do not store products of this sort near the heater. Also, air which is brought in contact with the heater should no contain any of these chemicals. If necessary, uncontaminated air should be obtained from remote or outside sources. The limited warranty is voided when failure of water heater is due to a corrosive atmosphere. (Refer to the limited warranty for complete terms and conditions).

2.INSULATION BLANKETS CAN RESTRICT THE AIR FLOW NEEDED FOR PROPER OPERATION OF THE COMBUSTION SYSTEM AND COULD RESULT IN FIRE, ASPHYXIATION, SERIOUS PERSONAL INJURY OR DEATH.

WARNING

FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN SERIOUS PERSONAL INJURY OR DEATH.

IMPROPER COMBUSTION

WARNING

ATTIC AND OR EXHAUST FANS OPERATING ON THE PREMISES WITH A WATER HEATER CAN RESULT IN CARBON MONOXIDE POISONING AND DEATH.

OPERATIONOFTHESEFANSCANPRODUCEANEGATIVEDRAFT IN THE AREA OF THE WATER HEATER PREVENTING THE PRODUCTS OF COMBUSTION FROM EXHAUSTING THROUGH THE CHIMNEY OR VENT PIPE.

The venting of the water heater should be inspected by a qualified service technician at the time of installation and periodically thereafter to ensure a down-draft condition does not exist.

DO NOT OBSTRUCT THE FLOW OF COMBUSTION AND VENTILATION AIR, ADEQUATE AIR FOR COMBUSTION AND VENTILATION MUST BE PROVIDED FOR SAFE OPERATION.

EXTENDED NON-USE PERIODS

CATHODIC PROTECTION

CAUTION

HYDROGEN GAS CAN BE PRODUCED IN A HOT WATER SYSTEM SERVED BY THIS HEATER THAT HAS NOT BEEN USED FOR A LONG PERIOD OF TIME (GENERALLY TWO WEEKS OR MORE). HYDROGEN GAS IS EXTREMELY FLAMMABLE. To reduce the risk of injury under these conditions, it is recommended that a hot water faucet be opened for several minutes before using any electrical appliance connected to the hot water system. If hydrogen is present, there will probably be an unusual sound such as air escaping through the pipe as the water begins to flow. There should be not smoking or open flame near the faucet at the time it is open.

INSULATION BLANKETS

WARNING

INSULATION BLANKET AVAILABLE TO THE GENERAL PUBLIC FOR EXTERNAL USE ON GAS WATER HEATERS ARE NOT APPROVED FOR USE ON YOUR A.O. SMITH WATER HEATER. THE PURPOSE OF AN INSULATION BLANKET IS TO REDUCE THE STANDBY HEAT LOSS ENCOUNTERED WITH STORAGE TANKWATERHEATER. YOURA.O.SMITHWATERHEATERMEETS OR EXCEEDS THE ASHRAE/IES 90.1B 2001 STANDARDS WITH RESPECT TO INSULATION AND STANDBY LOSS REQUIREMENTS, MAKING AN INSULATION BLANKET UNNECESSARY. THE USE OF INSULATION BLANKETS IN CONJUNCTION WITH AN A.O. SMITH WATER HEATER WILL ALSO VOID THE SMITH WARRANTY FOR THE FOLLOWING REASONS:

1.INSULATION BLANKETS COVER IMPORTANT OPERATING INSTRUCTIONS AND SAFETY LABELS.

HIGH ALTITUDE INSTALLATIONS

Your A.O. Smith water heater has been designed to operate at altitudes below 2000 Ft. (609.6 m), for appliance installation locations with elevations above 2000 Ft. (609.6 m), special considerations need to be taken. Adjustments for high altitude can only be made by an A.O. Smith authorized BTP Start-up Agent. To ensure your water heater operates properly at high elevation, an A.O. Smith authorized BTP Start-up Agent will readjust the air-intake damper setting and the gas manifold pressure (if required).

NOTE: Some gas utility companies derate the heating value of the supplied gas at high elevation. Your authorized start-up agent must adjust for actual heating value of the gas at the time of start up.

FEATURES

LOW EMISSION CONTROL

Your A.O. Smith water heater has been designed to comply with standards established by California South Coast Air Quality Management District (SCAQMD), the most stringent emissions control agency in the nation. To ensure compliance with SCAQMD Rule 1146.2, your heater is equipped with an internal recirculation premix power burner, and must be started/adjusted by an A.O. Smith Authorized BTP Start-Up Agent.

HIGH LIMIT SWITCH (E.C.O.)

The dual bulb controller also contains the high limit (energy cutoff) sensor. The high limit switch interrupts main burner gas flow should the water temperature reach 205°F (96°C).

In the event of high limit switch operation, the appliance cannot be restarted unless the water temperature is reduced by 20°F (11°C) approx. and the high limit reset button on front of limit control is depressed, see Figure 1.

FIGURE 1.

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