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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).
IMPROPER COMBUSTION
WARNING
ATTIC AND OR EXHAUST FANS OPERATING ON THE PREMISES
WITH A WATER HEATER CAN RESULT IN CARBON MONOXIDE
POISONING AND DEATH.
OPERATION OF THESE FANS CAN PRODUCE A NEGATIVE DRAFT
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
TANK WATER HEATER. YOUR A.O. SMITH WATER HEATER MEETS
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.
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.
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.