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If the boiler combustion air inlet is located in any area likely to cause contamination, or if products which
would contaminate the air cannot be removed, you must have the combustion air and vent re-piped and
terminated to another location. Contaminated combustion air will damage the boiler, resulting in possible
severe personal injury, death or substantial property damage.
Do not operate an SlimFit boiler if its combustion air inlet is located in a laundry room or pool facility,
for example. These areas will always contain hazardous contaminants.
Pool and laundry products and common household and hobby products often contain fluorine or chlorine
compounds. When these chemicals pass through the boiler, they can form strong acids. The acid can eat
through the boiler wall, causing serious damage and presenting a possible threat of flue gas spillage or
boiler water leakage into the building.
Please read the information listed below. If contaminating chemicals will be present near the location of
the boiler combustion air inlet, have your installer pipe the boiler combustion air and vent to another
location, per the Boiler manual.
Products to avoid Areas likely to have contaminants
Spray cans containing chloro/fluorocarbons Dry cleaning/laundry areas and establishments
Permanent wave solutions Swimming pools
Chlorinated waxes/cleaners Metal fabrication plants
Chlorine-based swimming pool chemicals Beauty salons
Calcium chloride used for thawing Refrigeration repair shops
Sodium chloride used for water softening Photo processing plants
Refrigerant leaks Auto body shops
Paint or varnish removers Plastic manufacturing plants
Hydrochloric acid/muriatic acid Furniture refinishing areas and establishments
Cements and glues New building construction
Antistatic fabric softeners used in clothes dryers Remodeling areas
Chlorine-type bleaches, detergents, and cleaning
solvents found in household laundry rooms
Garages with workshops
Adhesives used to fasten building products and
other similar products
Excessive dust and dirt
Prevent combustion air contamination
Part number 550-100-560/0321
9
SlimFit
®
Series 3
gas-fired water boiler
— User’s Information Manual
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