Part number
550-100-268/1220
5
CONDENSING
GAS
BOILER
—
V
ENT
A
DDENDUM
Direct Exhaust
(Category II Only) Boiler room air opening
Figure 1
Corrosive contaminants and sources
Products to avoid
Spray cans containing chloro/fl uorocarbons
Permanent wave solutions
Chlorinated waxes/cleaners
Chlorine-based swimming pool chemicals
Calcium chloride used for thawing
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 cleaning solvents found in
household laundry rooms
Adhesives used to fasten building products and other similar
products
Excessive dust and dirt
Areas likely to have contaminants
Dry cleaning/laundry areas and establishments
Swimming pools
Metal fabrication plants
Beauty shops
Refrigeration repair shops
Photo processing plants
Auto body shops
Plastic manufacturing plants
Furniture refi nishing areas and establishments
New building construction
Remodeling areas
Garages with workshops
any of the contaminants in Figure 1, page 5.
Do not pipe combustion air near a swimming
pool, for example. Avoid areas subject to exhaust
fumes from laundry facilities. These areas will
always contain contaminants.
Contaminated combustion air will damage the
boiler, resulting in possible severe personal injury,
death or substantial property damage.
