Lochinvar EFFICIENCY PLUS, Руководство дизайнера

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4 L o c h i n v a r
D E S I G N E R
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S G U I D E E F F I C I E N C Y
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B O I L E R
6 1 5 - 8 8 9 - 8 9 0 0
Installation Code for Gas Burning Appliances
and Equipment
, or applicable provisions of
the local building codes.
The equipment room must be provided with
properly sized openings to assure adequate
combustion air and proper ventilation, when
the unit is installed with conventional venting
or sidewall venting.
If air is taken directly from outside
the building with no duct, provide
two permanent openings:
A.
Combustion air opening with a
minimum free area of one square inch per
4000 Btu/hr input. This opening
must be
located within 12 ” (30 cm) of the bottom of
the enclosure.
B. Ventilation air opening with a minimum
free area of one square inch per 4000
Btu/hr input. This opening
must be
located within 12
”
(30 cm) of the top of
the enclosure.
If combustion and ventilation air is
taken from the outdoors using a
duct to deliver the air to the
mechanical room,
each of the two
openings should be sized based on a
minimum free area of one square inch per
2000 Btu/hr.
If air is taken from another interior
space,
each of the two openings
specified above should have a net free
area of one square inch for each 1000
Btu/hr of input, but not less than 100
square inches (645 cm
2 ).
If a single combustion air opening is
provided to bring combustion air in
directly from the outdoors,
the opening
must be sized based on a minimum free
area of one square inch per 3000 Btu/hr.
This opening
must be located within 12
”
(30 cm) of the top of the enclosure.
Lochinvar
(FIG. 4) COMBUSTION AIR FROM INTERIOR SPACE
(FIG. 3) COMBUSTION AIR THROUGH DUCTWORK
2.
3.
4.
(FIG. 5) COMBUSTION AIR FROM
OUTSIDE SINGLE OPENING
(FIG. 2) COMBUSTION AIR DIRECT FROM OUTSIDE
1.
EXAMPLE OF
SIZING FOR
COMBUSTION
& VENTILATION
AIR OPENINGS
(BOILER WITH
300,000 BTU/HR
INPUT):
When combustion and
ventilated air is taken from
directly outside the building
(FIG. 2), divide the total BTU’s
by 4,000. This yields 75 sq.in.
of “Free Area” without
restriction.
300,000 ÷ 4,000 =
75 sq.in.
Since the air opening is 50%
closed due to screens and
louvers, the total opening
MUST be multiplied by 2.
75 sq.in. x 2 =
150 sq.in.
This project requires one
Ventilation Air Opening with
net “Area” of 75 square
inches with louver dimensions of
12” x 15”= 168 sq.in.
and one Combustion Air
Opening with net “Area”
of 75 square inches with
louver dimensions of
12” x 15”= 168 sq in.
CAUTION: Under no circumstances should
the equipment room be under a negative
pressure when atmospheric combustion
equipment is installed in the room.