100221773_2000189439_Rev. 01
www. lochinvar .com
17
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 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.
INSULATION JACKETS AND 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 standby heat loss encountered with storage tank
heaters. Your water heater meets or exceeds the current
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
through Figure 7). Failure to follow these instructions will
restrict the air flow required for proper combustion and
dilution, 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 T&P relief
valve, FV sensor, or Air Intake Snorkel.
•
Do not cover the “Installation And Operating 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 flow.
Breathing carbon monoxide can cause brain damage or death.
Always read and understand instruction manual.
• Do not obstruct water heater air intake(s) with
insulating jacket or blanket.
• Gas and carbcn monoxide detectors are available.
• Install water heater in accordance with the
instruction manual and NFPA54.
Breathing Hazard - Carbon Monoxide Gas
WARNING
AIR REQUIREMENTS
For safe operation an adequate supply of fresh,
uncontaminated air for combustion, dilution and ventilation
must be provided.
Note:
Contaminated or dusty air may cause build-up on
the blower wheel resulting in nuisance shut downs.
An insufficient supply of air can cause recirculation of
combustion products resulting in contamination that may
be hazardous to life. Such a condition often will result in
a yellow, luminous burner flame, causing sooting of the
combustion chamber, burners and flue tubes and creates
a risk of asphyxiation.
Do not install the water heater in a confined space unless
an adequate supply of air for combustion, dilution and
ventilation is brought into that space using the methods
described in the “Confined Space” section that follows.
Never obstruct the flow of dilution/ventilation air. If you
have any doubts or questions at all, call your gas supplier.
Failure to provide the proper amounts of air can result in
a fire or explosion and cause property damage, serious
bodily injury or death. The combustion and dilution air
inlets are shown in Figure 2.
Important:
Power Vented water heaters require air for
combustion and dilution air for the blower.
Air supply must be provided as required by the current
edition of
“National Fuel Gas Code”, ANSI Z223.1/
NFPA 54
.
UNCONFINED SPACE
An Unconfined Space is one whose volume is not less than
50 cubic feet per 1,000 Btu/hr 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 ventilation systems, clothes dryers and fireplaces
should also be considered in determining the adequacy of
a space to provide combustion, ventilation and dilution air.
UNUSUALLY TIGHT CONSTRUCTION
In unconfined spaces in buildings, infiltration may be
adequate to provide air for combustion, ventilation and
dilution of flue gases. However, in buildings of unusually
tight construction (e.g., weather stripping, heavily
insulated, caulked, vapor barrier, etc.) additional air must
be provided using the methods described in the ”Confined
Space” section that follows.
