5
CHAPTER 2
CHAPTER 2 - COMBUSTION AIR & VENTING
2.1. Combustion Air Contamination
If the INSTINCT combustion air inlet is located
in an area likely to cause or contain contamina-
tion, or if products which could contaminate
the air cannot be removed, the combustion air
must be repiped and terminated at another lo-
cation. Contaminated combustion air will dam-
age the unit and its burner system, and can
result in substantial property damage, serious
injury, or death.
• Do not operate the INSTINCT if the com-
bustion air inlet is located near a laundry
room or pool facility. These areas will al-
ways contain hazardous contaminants.
• Pool, laundry, common household, and
hobby products often contain fluorine or
chlorine compounds. When these chem-
icals pass through the burner and vent
system, they can form strong acids. These
acids will corrode the heat exchanger,
burner components, and vent system,
causing serious damage and possible
flue gas spillage or water leakage into
the surrounding area.
• Please read the information listed below.
If contaminating chemicals are located
near the area of the combustion air inlet,
the installer must pipe the combustion
air inlet to an area free of these chemicals,
as indicated in Chapter 6 on page 38.
• Failure to comply with these instructions
will result in substantial property dam-
age, serious injury, or death.
• The INSTINCT boiler is classified as a
Category IV appliance. This utilizes un-
contaminated indoor or outdoor air for
applicance combustion. A direct vent
installation uses the outdoor air. Air sup-
ply, combusiton chamber, heat exchang-
er and evacuation of POC (products of
combustion) for this type of appliance is
sealed with respect to the room in which
the appliance is installed.
WARNING
DANGER
• An in-direct installation uses uncontami-
nated indoor air for appliance combustion.
• When the air for combustion is taken
from the room air grilles must be installed
by the contractor. The air grilles should
be sized in accordance with ANSI Z223.1/
NFPA54 and/or Natural Gas and Propane
Installation Code CAN/CSA B149.1.
• The grille providing air when taking air
directly from the room should be clear-
ly labelled; "AIR SUPPLY, DO NOT COVER
OR RESTRICT. FAILURE TO PROVIDE AD-
EQUATE AIR FOR COMBUSTION COULD
RESULT IN SERIOUS INJURY, OR DEATH."
Potential contaminating products
• Spray cans containing chloro/uorocarbons
• Permanent Wave Solutions
• Chlorinated wax
• Chlorine based swimming pool chemicals /
cleaners
• Calcium Chloride used for thawing ice
• Sodium Chloride used for water softening
• Refrigerant leaks
• Paint or varnish removers
• Hydrochloric acid / muriatic acid
• Cements and glues
• Antistatic fabric softeners used in clothes dryers
• Chlorine-type bleaches, detergents, and clean-
ing solvents found in household laundry rooms
• Adhesives used to fasten building products and
other similar products
Areas likely to contain these products
• Dry cleaning / laundry areas and establishments
• Beauty salons
• Metal fabrication shops
• Swimming pools and health spas
• Refrigeration Repair shops
• Photo processing plants
• Auto body shops
• Plastic manufacturing plants
• Furniture renishing areas and establishments
• New building construction
• Remodeling areas
• Garages with workshops
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