Excelsior DK4EXA075, Установка, эксплуатация и обслуживание

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Determine volume of space (boiler room). Rooms 1.
communicating directly with the space in which the ap-
pliances are installed, through openings not furnished
with the doors, are considered a part of the space.
Volume (ft
3
) = Length (ft) x Width (ft) x Height (ft)
Determine total input of all appliances in the space. Add 2.
inputs of all appliances in the space and round the result
to the nearest 1000 BTU/hr.
Determine type of space. Divide Volume by total input 3.
of all appliances in space. If the result is greater than or
equal to 50 ft
3
/1000 BTU/hr, then it is considered an un-
confined space
. If the result is less than 50 ft 3 /1000 BTU/
hr, then the space is considered a
confined space.
When a boiler is located in an unconfined space of a con
- 4.
ventionally constructed building, the fresh air infiltration
through cracks around windows and doors normally pro-
vides adequate air for combustion and ventilation.
Provide outdoor air for boiler located in a confined space
5.
or an unconfined space in a building of unusually tight
construction. Outdoor air may be provided with the use of
two permanent openings which communicate directly or
by duct with the outdoors or spaces (crawl or attic) freely
communicating with the outdoors. Locate one opening
within 12 inches of top of space. Locate remaining open-
ing within 12 inches of bottom of space. Size each open-
ing per the following:
direct communication with outdoors: a.
Minimum free area of 1 square inch per 4,000 BTU
per hour input of all equipment in space.
Vertical ducts: b.
Minimum free area of 1 square inch
per 4,000 BTU per hour input of all equipment in
space. Duct cross-sectional area shall be same as
opening free area.
FRESH AIR FOR COMBUSTION
Horizontal ducts c.
: Minimum free area of 1 square
inch per 2,000 BTU per hour input of all equipment
in space. Duct cross-sectional area shall be same as
opening free area.
Alternate method for boiler located within con
-
fined space:
Use indoor air if two permanent open-
ings communicate directly with additional space(s) of
sufficient volume such that the combined volume of all
spaces meet criteria for unconfined space. Size each
opening for minimum free area of 1 square inch per
1,000 BTU per hour input of all equipment in spaces,
but not less than 100 square inches.
Louvers and Grilles of Ventilation Ducts 6.
All outside openings should be screened and lou- a.
vered. Screens used should not be smaller than 1/4
inch mesh. Louvers will prevent the entrance of rain
and snow.
Free area requirements need to consider the block- b.
ing effect of louvers, grilles or screens protecting the
openings. If the free area of the louver or grille is not
known, assume wood louvers have 20-25% free area
and metal louvers and grilles have 60-75% free area.
Louvers and grilles must be fixed in the open posi
- c.
tion, or interlocked with the equipment to open auto-
matically during equipment operation.
noTe: If you use a fireplace or a kitchen or a
bathroom exhaust fan, you should install an out-
side air intake. These devices will rob the boiler
and water heater of combustion air.
Adequate combustion and ventilation air must
be provided to assure proper combustion and to
maintain safe ambient air temperatures. do not
install boiler where gasoline or other flammable
vapors or liquids, or sources of hydrocarbons,
(i.e. Bleaches & fabric softeners) are used or
stored.
AIR OPEnIngS FOR BOIlER lOCATED In
COnFInED SPACE (Utility Room)
WARNING
!
Figure #2A