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Innovation - Edge [i] Installation, Operation, Maintenance Manual
CHAPTER 2
– INSTALLATION
OMM-0143_A
• GF
-216
•
9/6/2019
Technical Support
•
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equivalent length. For a natural draft installation, the draft
must not exceed -
0.10” W.C. (-24.9
Pa)
. These factors must be planned into the vent installation. If the maximum allowable
equivalent lengths of piping are exceeded, the unit will not operate properly or reliably.
For Massachusetts installations, the following companies provide vent systems which conform
to all applicable requirements for installations within the Commonwealth of Massachusetts.
Contact information is as follows:
Selkirk Corporation - Heatfab Division
130 Industrial Blvd.
Turners Falls, MA 01376
Phone: 1-800-772-0739
Watertown Supply
33 Grove St.
Watertown, MA 02472
Phone: (617) 924-2840
http://www.watertownsupply.com/
Glover Sheet Metal, Inc.
44 Riverdale Ave.
Newton, MA 02485
Phone: (617) 527-8178
Emerson Swan Co
Engineering Products Department
300 Pond St.
Randolph, MA 02368
Phone 781-986-2555
Fax 781-986-2027
www.emersonswan.com
2.14 COMBUSTION AIR
The
Innovation-Edge Venting and Combustion Air Design Guide
(TAG-0090, GF-5056) must be
consulted before any flue or inlet air venting is designed or installed.
Air supply is a direct requirement of ANSI 223.1, NFPA-54, CSA B149.1 and local codes. These
codes should be consulted before a permanent design is determined.
The combustion air
MUST
be free of chlorine, halogenated hydrocarbons or other chemicals
that can become hazardous when used in gas-fired equipment. Common sources of these
compounds are swimming pools, degreasing compounds, plastic processing, and refrigerants.
Whenever the environment contains these types of chemicals, combustion air
MUST
be
supplied from a clean area outdoors for the protection and longevity of the equipment and
warranty validation.
The more common methods of combustion air supply are outlined in the next two sections,
below. For combustion air supply from ducting, see Section 2.15:
Ducted Combustion Air
, or
consult the
Innovation-Edge Venting and Combustion Air Design Guide
(TAG-0090, GF-5056).
2.14.1 Combustion from Outside the Building
Air supplied from outside the building must be provided through two permanent openings. For
each unit these two openings must have a free area of not less than one sq. in. (6.45 sq. cm) for
each 4000 BTUs (1.172 kW) input of the equipment or 250 sq. in. (1613 sq. cm) of free area.
The free area must must take into account restrictions such as louvers and bird screens.
For Canada installations, refer to the requirements specified in CSA B149.1-10, 8.4.1 and 8.4.3.
2.14.2 Combustion Air from Inside the Building
When combustion air is provided from within the building, it must be supplied through two
permanent openings in an interior wall. Each opening must have a free area of not less than
one sq. in. (6.45 sq. cm) per 1000 BTU (0.293 kW) of total input or 1000 sq. in. (6,451 sq. cm)
of free area. The free area must take into account any restrictions, such as louvers.