A.O. Smith 100 120, Instruction Manual

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in an alcove or closet, the entire floor must be covered by the panel.
Failure to heed this warning may result in a fire hazard.
Minimum clearances between the water heater and combustible
construction are 0 inch at the sides and rear, 5.5” (14.0 cm) from
the front and 18” (45.7 cm) from the top. (Standard clearance.) If
clearances stated on the heater differ from standard clearances, install
water heater according to clearances stated on the heater.
Adequate clearance 30” (76 cm) for servicing this appliance should be
considered before installation, such as changing the anodes, control
system components and gas valve.
A minimum clearance of 5.5” (14.0 cm) must be allowed for access to
replaceable and/or serviceable parts such as the thermostats, drain
valve, condensate drain, relief valve, clean out opening, and the vent
connection (exhaust elbow).
When installing the heater, consideration must be given to proper
location. Location selected should be as close to the wall as practicable
and as centralized with the water piping system as possible.
fIGure 2.
InsulatIon blanKets
Insulation blankets are available to the general public for external use on
gas water heaters but are not necessary with these products. The purpose
of an insulation blanket is to reduce the standby heat loss encountered
with storage tank heaters. Your water heater meets or exceeds the
Energy Policy Act standards with respect to insulation and standby loss
requirements, making an insulation blanket unnecessary.
Should you choose to apply an insulation blanket to this heater, you
should follow these instructions (For identification of components
mentioned below, see Figure 1). 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 apply insulation to the top of the water heater, as this will
interfere with safe operation of the blower assembly.
• Do not cover the outer door, thermostat or temperature & pressure
relief valve.
• 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 the manufacturer
for placement on the blanket directly over the existing labels.
coMbustIon aIr and ventIlatIon
A gas water heater cannot operate properly without the correct
amount of air for combustion. Do not install in a confined area such
as a closet, unless you provide air as shown in the “Facts to Consider
About Location” section. Never obstruct the flow of ventilation air.
If you have any doubts or questions at all, call your gas supplier.
Failure to provide the proper amount of combustion air can result
in a fire or explosion and cause death, serious bodily injury, or
property damage.
fIGure 3.
If this water heater will be used in beauty shops, barber shops,
cleaning establishments, or self-service laundries with dry cleaning
equipment, it is imperative that the water heater (s) be installed
direct vent so that all air for combustion and ventilation is taken
from outdoors.
Propellants of aerosol sprays and volatile compounds, (cleaners,
chlorine based chemicals, refrigerants, etc.) in addition to being
highly flammable in many cases, will also react to form corrosive
hydrochloric acid when exposed to the combustion products of
the water heater. The results can be hazardous, and also cause
product failure.
unconfIned space
An Unconfined Space is one whose volume IS NOT LESS THAN
50 cubic feet per 1,000 Btu/hr (4.8 cubic meters per kW) of the
total input rating of all appliances installed in the space. Rooms
communicating directly with the space, in which the appliances are
installed, through openings not furnished with doors, are considered
a part of the unconfined space.
Makeup air requirements for the operation of exhaust fans, kitchen