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Section A: Before Installing Boiler
Installations must comPlY with:
o
State. pro','incial and local plumbing,
heating and
electrical codes.
o
Regulations of senring utilities.
o
National codes where applicable.
Before selecting boiler location:
o
Check for nearby connections to:
fuel sr-rpply
electrical power
system water or steam PiPing
- r,'entinA systems - see page 24.
combustion and ventilation air supply - see "Providc
combustion and ventilation air supply openings"
below.
o Check area around boiler for and remove any combus-
tible materials, gasoline and other flammable vapors
ancl liouids.
Failure to keep boilcr area clear and
free of combustible materials, Aaso-
line and other flammable liquids and
vapors can rcsult in severc personal
injury, death and substantial proper-
ty damagc.
Provide combustion and ventilation air openings:
Do not install arn exhaust lan in boiler
room. Adequatc combustion
and ventila-
tion air must be provided to assure propcr
combustion and prevent possibility of flue
gas lezrkage and carbon monoxide emis-
sions, causing severe personal injury or
death.
Opening sizes must comply with state, provincial or local
codes. In their absence. use the following when boiler is in
a confined room:
o
Provide two penniar-rent openings in boiler room
- one
within
12 inches of ceiling. one ','v'ithin l2 inches of
floor. Minimum
dimension of each opening - 3 inches.
-
When all air is taken from rvithin building, each
opening should be at least one square inch/
1'ooo Btuh boiler input and freell' connect with
areas having adequate infiitration
from outside.
-
When all air is taken from outdoors. each opening
should connect directly or by ducts with outdoors
or crawl or attic spaces that lreely connect with
outdoors ancl sized as listed below:
through outside wall or vertical ducts - at least
one square
inch/4,000
Btuh boiler input.
-
through horizontal ducts - a least one square
inch/2,000
Btuh boiler inPut.
-
where ducts are used, they should be same
cross-sectional area as lree area of openings
they are connect.ed to.
-
Compcnsate lbr louver, grille or screcn block-
age whcn calculating liee air openings. Refer to
thcir mzrnufacturer's instntctions
lbr size . If
ttnkrtowlr, ttse:
-
wood louvcrs - 2o-25oh free air.
-
metal louvers or grilles - 60-750/o lree air.
-
screens - not less than l/4 inch mesh.
l,ock louvers in open position, or interlockwith
equipment to prove open belbre boiler opera-
tion.
L O U V E R M I N , I 2 "
ABOVE AVG. SNOWLINE
NOTE: DUCT SIZE
EQUAT TO
TOTAL
LOUVER AREA
BOILER ROOI'1
FTOOR
Combustion and Ventilation Air Openings
Boiler Room Partially or Completely Above Grade
Figure 2
o
GRATING _
M I N , I 2 ' A B O V E
AVG, SNOWLINE
SIZE OF AREAWAY
A N D G R A T I N G T O
B E E Q U A L T O O R
GREATER THAN
TOTAL TOUVER
AREA.
AREAWAY
Combustion and Ventilation Air Openings
Boiler Room Below Grade
Figure I
4
t/
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