OMM-0153_E
• 5/11/2023 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 29 of 124
CENTURION Installation, Operation & Maintenance Manual
SECTION 2: INSTALLATION
Figure 2-17: Fasten the Three Screws 120 Degrees Apart
2.11.2 Massachusetts Installations
For Massachusetts installations, the following companies provide vent systems that conform to
all applicable requirements for installations within the Commonwealth of Massachusetts:
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
Glover Sheet Metal, Inc.
44 Riverdale Ave.
Newton, MA 02485
Phone: (617) 527-8178
Emerson Swan Co
300 Pond St.
Randolph, MA 02368
Phone 781-986-2555
2.12 Combustion Air
The
Centurion Venting and Combustion Air Design Guide,
TAG-0102
must
be consulted before
any 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, other chemicals that
can become hazardous when used in gas-fired equipment and other combustion products.
Common sources of these compounds are swimming pools, degreasing compounds, brine
tanks, 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.
If combustion air is supplied directly to the unit(s) though air duct(s), see Section 2.12.1, below.
If combustion air is not supplied through air ducts, it must be supplied to the unit(s) through two
permanent openings. These two openings must have a free area of
not less than one square
inch (6.5 cm
2
) for each 4000 BTUs (1.17 kW) input
for each unit
. The free area must take
into account restrictions such as louvers and bird screens.
For Canada installations, refer to the requirements specified in Sections 8.4.1 and 8.4.3 of the
CSA B149.1-10.
