Milwaukee THB High Boy series, Руководство пользователя

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THB & TLB
Oil Furnaces
– Furnace Manual
4
670-000-005/1010
1 Prepare furnace location
(continued)
Air for combustion and ventilation
Adequate combustion and ventilation air ensures
proper combustion and reduces risk of severe
personal injury or death from possible flue gas
leakage and carbon monoxide emissions.
Do not install exhaust fan in furnace room.
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
are used and openings in walls are caulked. As a result, such
tight construction is unlikely to allow proper natural air infiltration
and ventilation.
For buildings with tight construction, provide openings directly to
outside or to a ventilated crawl space or attic. Size the openings
to the same specifications as for the furnace location per the
following paragraphs.
Follow state, provincial or local codes when sizing adequate
combustion and ventilation air openings. In absence of codes,
use the following guidelines when furnace is in a confined room
(defined by NFPA 31 as less than 7,200 cubic feet per 1 GPH
input of all appliances in area. A room 8 ft. high x 30.0 ft. x 30.0 ft.
is 7200 cu. ft.).
Provide two permanent openings:
Opening locations
One within 12 inches of ceiling, one within 12 inches of floor.
Minimum height or width dimension of each rectangular opening
should be at least 3 inches.
When inside air is used:
Each opening must freely connect with areas having adequate
infiltration from outside. Each opening should be at least 140 sq.
in. per 1 GPH input (1 sq. in. per 1000 BTU input) of all fuel-
burning appliances plus requirements for any equipment that can
pull air from room (including clothes dryer and fireplace).
When outside air is used
Connect each opening directly, by way of ducts to the outdoors,
or to crawl or attic space that freely connects with outdoors. Size
per below:
•
Through outside wall or vertical ducts – at least 35 sq. in. per
1 GPH input (1sq. in. per 4,000 BTU input) of all fuel burning
appliances plus requirements for any equipment that can pull
air from room (including clothes dryer and fireplace).
•
Through horizontal ducts – at least 70 sq. in. per 1 GPH
furnace input (1 sq. in. per 2,000 BTU input) of all fuel-
burning appliances plus requirements for any equipment that
can pull air from room (including clothes dryer and fireplace).
•
Where ducts are used, they should have the 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. Refer to their
manufacturer’s instructions for details. If unknown, use:
•
Wood louvers, which provide 20-25 % free air.
•
Metal louvers or grilles, which provide 60-75 % free air.
Lock louvers in open position or interlock with equipment to
prove open before furnace operation.
Basement installations
When the furnace is located in an unconfined space, such as an
unpartitioned basement, adequate air should normally be
available without additional opening. An unconfined space is
defined as one having no less than 50 cubic feet room volume
per 1,000 BTU input of all appliances in the space.
If the house is of tight construction, provide air openings to the
basement directly from outside or from a ventilated attic. Size the
openings as described above under “When outside air is used”.
Closet installations – special NOTICE
Openings in closet doors
Provide TWO openings – one within 6 inches of top of closet
door, the other within 6 inches of the bottom of closet door.
EACH opening must be at least 24 inches wide by 12 inches
high.
Advise homeowner that the openings to the
closet must never be obstructed or blocked in any
way. Failure to provide adequate air for
combustion and ventilation could result in severe
personal injury, death or substantial property
damage.