Insulation Blankets; Combustion Air And Ventilation For Appliances Located In Unconfi Ned Spaces; Combustion Air And Ventilation For Appliances Located In Confi Ned Spaces - Lochinvar COMMERCIAL GAS WATER HEATERS Instruction Manual

FIGURE 3.
A gas water heater cannot operate properly without the correct amount
of air for combustion. Do not install in a confi ned area such as a
closet, unless you provide air as shown in the "Locating The New
Water Heater" section. Never obstruct the fl ow 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 fi re or
explosion and cause death, serious bodily injury, or property damage.
FIGURE 4.
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 or water heaters be installed so
that combustion and ventilation air be taken from outside these areas.
Propellants of aerosol sprays and volatile compounds, (cleaners,
chlorine based chemicals, refrigerants, etc.) in addition to being
highly fl ammable in many cases, will also change to corrosive
hydrochloric acid when exposed to the combustion products of
the water heater. The results can be hazardous, and also cause
product failure.

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 National Appliance Energy Conversation 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 identifi cation of components
mentioned below, see Figure 1). Failure to follow these instructions
can restrict the air fl ow required for proper combustion, potentially
resulting in fi re, 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 draft hood.
• Do not cover the outer door, thermostat or temperature & pressure
relief valve.
• Do not allow insulation to come within 2" (50.8 mm) of the fl oor to
prevent blockage of combustion air fl ow 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 the manufacturer
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 fl ow.
COMBUSTION AIR AND VENTILATION FOR
APPLIANCES LOCATED IN UNCONFINED SPACES
UNCONFINED SPACE is space whose volume is not less than
50 cubic feet per 1,000 Btu per hour (4.8 cm per kW) of the aggregate
input rating of all appliances installed in that 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 unconfi ned space.
In unconfi ned spaces in buildings, infi ltration may be adequate to
provide air for combustion, ventilation and dilution of fl ue gases.
However, in buildings of tight construction (for example, weather
stripping, heavily insulated, caulked, vapor barrier, etc.), additional
air may need to be provided using the methods described in
"Combustion Air and Ventilation for Appliances Located in Confi ned
Spaces."
COMBUSTION AIR AND VENTILATION FOR
APPLIANCES LOCATED IN CONFINED SPACES
CONFINED SPACE is a space whose volume is less than 50 cubic
feet per 1,000 Btu per hour (4.8 cm per kW) of the aggregate input
rating of all appliances installed in that space.
A. ALL AIR FROM INSIDE BUILDINGS: (See Figure 4 and 5)
The confi ned space shall be provided with two permanent openings
communicating directly with an additional room(s) of suffi cient volume so
that the combined volume of all spaces meets the criteria for an unconfi ned
space. The total input of all gas utilization equipment installed in the
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