U.S. Boiler Company MPO - IQ, Инструкция по эксплуатации

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9
C. PROVIDE COMBUSTION AND VENTILATION
AIR. Local and National Codes may apply and should
be referenced.
WARNING
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,
etc.) are used or stored.
1. Determine volume of space (boiler room). Rooms
communicating directly with the space in which the
appliances are installed, through openings not furnished
with doors, are considered a part of the space.
Volume(ft
3
) = Length(ft) x Width(ft) x Height(ft)
2. Determine total input of all appliances in the space.
Add inputs of all appliances in the space and round the
result to the nearest 1000 BTU per hour.
3. Determine type of space. Divide Volume by total input
of all appliances in space. If the result is greater than or
equal to 50 ft
3
/1000 BTU per hour, then it is considered
an
unconfined space
. If the result is less than 50 ft
3
/1000
BTU per hour then the space is considered a
confined
space
.
4. For boiler located in an unconfined space of a
conventionally constructed building , the fresh air
infiltration through cracks around windows and doors
normally provides adequate air for combustion and
ventilation.
5. For boiler located in a confined space or an unconfined
space in a building of
unusually tight construction
,
provide outdoor air.
a. Outdoor air for combustion may be provided
with an optional Fresh Air Accessory Kit ( ONLY
AVAILABLE WITH BECKETT BURNER ).
Metal cover applications, P/N 611280031. Plastic
cover applications, P/N 102119-01. Refer to Fresh
Air Accessory Kit instructions for installation and air
intake piping details. See Section V for installation
details.
or
b. 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 opening within 12 inches of bottom of
space. Minimum dimension of air opening is 3 inches.
Size each opening per following:
i. Direct communication with outdoors.
Minimum free area of 1 square inch per
4,000 BTU per hour input of all equipment
in space.
ii. Vertical ducts. 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.
iii. Horizontal ducts.
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
confined space. Use indoor air if two permanent
openings communicate directly with additional
space(s) of sufficient volume such that 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.
Figure 2B: Direct Vent Boiler - Minimum Installation Clearances To Combustible Materials (Inches)
I. PRE-INSTALLATION (continued)