4 Part Number 550-110-772/0816
OSB
Series 2 Oil-Fired Steam Boilers – Boiler Manual
To prevent potential of severe personal injury or
death, check for products or areas listed below
beforeinstallingboiler.Ifanyofthesecontaminants
are found:
• removecontaminantspermanently.
— OR —
• isolateboilerandprovideoutside combustionair.
See national, provincial or local codes for further
information.
Please review the following information on potential combustion
air contamination problems.
See Table 2 for products and areas which may cause contaminated
combustion air.
1 Prepare boiler location continued
Air contaminationAir for combustion and ventilation
Adequatecombustionandventilationair:
• Assurespropercombustion.
• Reducesriskofseverepersonalinjuryordeathfrom
possibleue gas leakage and carbon monoxide
emissions.
• Donotinstallexhaustfaninboilerroom.
Consider building construction
Older buildings with single-pane windows,minimal weather-
stripping and no vapor barrier often provide enough natural
infiltration and ventilation without dedicated openings.
New construction or remodeled buildings are most often built
tighter. Windows and doors are weather-stripped, vapor barriers
areusedandopenings in wallsarecaulked. As a result,such
tight construction is unlikely to allow proper natural air infiltration
and ventilation.
Follow state, provincial or local codes when sizing adequate
combustionandventilationairopenings. In absence of codes,
use the following guidelines when boiler is in a confined room
(denedbyNFPA 31 as less than 7200 cubic feetper1GPH
inputofallappliancesinarea.Aroom8ft.highx30.0ft.x30.0
ft.is7200cu.ft.).
Provide two permanent openings:
One within 12 inches of ceiling, one within 12 inches of oor.
Minimumheightorlengthdimensionofeachrectangularopening
should be at least 3 inches.
When inside air is used:
Eachopeningmustfreelyconnectwithareashavingadequate
inltrationfromoutside.Eachopeningshouldbeatleast140sq.
in.per1GPHinput(1sq.in.per1000Btuinput)ofallfuel-burning
appliances plus requirements for any equipment that can pull air
fromroom(includingclothesdryerandreplace).
When outside air is used:
Connect each opening directly or by ducts to the outdoors or to
crawloratticspacethatfreelyconnectswithoutdoors.Sizeper
below:
• Throughoutsidewallorverticalducts—atleast35sq.in.per
1GPHinput(1sq.in.per4000Btuinput)ofallfuelburning
appliances plus requirements for any equipment that can pull
airfromroom(includingclothesdryerandreplace).
• Through horizontalducts — at least 70 sq. in. per 1 GPH
boilerinput(1sq.in.per2000Btuinput)ofallfuel-burning
appliances plus requirements for any equipment that can pull
airfromroom(includingclothesdryerandreplace).
• Where ducts are used, theyshould have same cross-
sectional area as free area of openings to which they connect.
Compensate for louver, grille or screen blockage when
calculating free air openings. Referto their manufacturer’s
instructionsfordetails.Ifunknown,use:
• Woodlouvers,whichprovide20-25%freeair.
• Metallouversorgrilles,whichprovide60-75%freeair.
Locklouversinopenpositionorinterlockwithequipmentto
prove open before boiler operation.
Table 2 Corrosive contaminants and likely locations
Products to avoid
Spray cans containing chloro/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
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 renishing areas and establishments
New building construction
Remodeling areas
Garages with workshops
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