4
IF YOU EXPERIENCE AN OUT-OF-GAS SITUATION, DO NOT TRY TO
RELIGHT APPLIANCES YOURSELF. Ask your LP delivery person to relight
pilots for you. Only trained LP professionals should conduct the required
safety checks in accordance with industry standards.
EXTENDED NON-USE PERIODS
WARNING
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 the hot water faucet be opened
for several minutes at the kitchen sink 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 NO SMOKING
OR OPEN FLAME NEAR THE FAUCET AT THE TIME IT IS OPEN.
INSULATION BLANKETS
Insulation blankets available to the general public for external use on
gas water heaters are not necessary with A.O. Smith products. The
purpose of an insulation blanket is to reduce the standby heat loss
encountered with storage tank heaters. Your A.O. Smith water heater
meets and exceeds the National Appliance Energy Conservation Act
standards with respect to insulation and standby loss requirements,
making an insulation blanket unnecessary.
WARNING
Should you choose to apply an insulation blanket to this heater, you
should follow these instructions. Failure to follow these instructions
can restrict the air flow required for proper combustion, potentially
resulting in fire, asphyxiation, serious personal injury or death.
•
Do not cover the gas valve or temperature & pressure relief valve.
•
Do not allow insulation to come within 2" of the air inlet box, to prevent
blockage of the dilution air.
•
Do not allow insulation to come within 2" of the floor to prevent
blockage of combustion air flow to the burner.
•
Do not cover the instruction manual. Keep it on the side of the water
heater or nearby for future reference.
•
Do obtain new warning and instruction labels from A.O. Smith for
placement on the blanket directly over the existing labels.
•
Do inspect the insulation blanket frequently to make certain it does
not sag, thereby obstructing combustion air flow.
CIRCULATING PUMP
A circulating pump is used when a system requires a circulating loop or
there is a storage tank used in conjunction with the heater. Refer to the
piping diagrams at rear of manual for electrical hookup information and
install in accordance with the latest version of the National Electric Code
ANSI/NFPA No. 70.
Only all bronze circulators are used with commercial water heaters.
Although circulators are oiled and operated by the manufacturer some
circulators must be oiled again before operating. Please refer to
manufacturer’s instructions.
DISHWASHING MACHINE REQUIREMENT
These appliances meet the National Sanitation Foundation Standard for
sanitary installations when used with the following leg kits, Part No’s.
6570-0 and 6570-7.
All dishwashing machines meeting the National Sanitation Foundation
requirements are designed to operate with water flow pressures
between 15 and 25 psi (103Kpa and 173 Kpa). Flow pressures above
25 psi (173Kpa), or below 15 psi (103 Kpa), will result in improperly
sanitized dishes. Where pressures are high, a water pressure reducing
or flow regulating control valve should be used in 180
0
F line to the
dishwashing machine, and should be adjusted to deliver water between
these limits.
The National Sanitation Foundation also recommends circulation of 180
0
F
(82°C) water. Where this is done, the circulation should be very gentle
so that it does not cause any unnecessary turbulence inside the water
heater. The circulation should be just enough to provide 180
0
F (82°C)
water at the point of take-off to the dishwashing machine. Adjust flow
by means of the plug cock in the circulating line.
INSTALLATION
REQUIRED ABILITY
INSTALLATION OR SERVICE OF THIS WATER HEATER REQUIRES ABILITY
EQUIVALENT TO THAT OF A LICENSED TRADESMAN IN THE FIELD
INVOLVED. PLUMBING, ELECTRICAL AIR SUPPLY, VENTING AND GAS
SUPPLY ARE REQUIRED.
GENERAL
The heater is designed to operate on natural or propane gases.
HOWEVER, MAKE SURE the gas on which the heater will operate is the
same as that specified on the heater model and rating plate. The
installation must conform to these instructions and the local code authority
having jurisdiction. In the absence of local codes, conform to the latest
edition of National Fuel Gas Code ANSI Z223.1/NFPA 54 and the National
Electric Code, NFPA 70. The former is available from the Canadian
Standards Association, 8501 East Pleasant Valley Road, Cleveland, OH
44131, and both documents are available from the National Fire Protection
Association, 1 Batterymarch Park, Quincy, MA 02269.
GROUNDING
The water heater, when installed, must be grounded in accordance with
local codes, or in the absence of local codes: The National Electric
Code, ANSI/NFPA 70;
HIGH ALTITUDE INSTALLATION
CAUTION
INSTALLATIONS ABOVE 2000 FT. REQUIRE REPLACEMENT OF THE
BURNER ORIFICE IN ACCORDANCE WITH THE NATIONAL FUEL GAS
CODE (ANSI Z223.1/NFPA 54). FAILURE TO REPLACE THE ORIFICE
COULD RESULT IN IMPROPER AND INEFFICIENT OPERATION OF THE
APPLIANCE, PRODUCING CARBON MONOXIDE GAS IN EXCESS OF SAFE
LIMITS, WHICH COULD RESULT IN SERIOUS PERSONAL INJURY OR
DEATH. CONTACT YOUR GAS SUPPLIER FOR ANY SPECIFIC CHANGES
WHICH MAY BE REQUIRED IN YOUR AREA.
A.O. SMITH BUILDS SOME MODELS SPECIFICALLY FOR HIGH ALTITUDE
SERVICE.
PLEASE CHECK THE RATING PLATE BEFORE MAKING CHANGES.
LOCATION OF HEATER
When installing the heater, consideration must be given to proper location.
Location selected should be as close to the wall as practicable with
adequate air supply and as centralized with the water piping system as
possible.
