Brochure

45
The Anatomy of Great
Permformance
COMMERCIAL
Combustion air intake – self adjusting-no air
shutter required
Modulating Control with 4:1 turndown
ratio. The VF’s ouput is based strictly on
the current system demand and the
required BTUs needed to maintain the
desired system set point
temperature. The VF’s
modulating capability is
virtually limitless between
25% and 100% fire.
Advanced pre-mix burner design precisely mixes
air and gas prior to ignition for optimum
performance, with low-NOx emissions
(complies with SCAQMD Rule 1146.2)
Venturi-mixing gas/air ratio system works with
variable speed blower to precisely mix gas and
air throughout firing range, provides good
operation with supply gas pressures down to 4˝
WC, and is self-adjusting for altitudes up to
6,000 feet, all while providing low NOx emissions
that meet or exceed the most stringent
standards
Heavy-duty ASME 160 psi copper finned tube
heat exchanger—vertical, straight tube, multi-
pass design surrounds the burner with a 360°
wall of copper finned tubing, making the
entire heat exchanger resistant to thermal
shock
The sealed heat exchanger flue collection
system is constructed of stainless steel that
resists corrosive flue gases
B
E
D
A
F
A
E
F
B
C
D
C
AOSCA80000 R July 2014 Commercial Catalog_108078_ResidentialFul#7A635.qxd 7/16/14 4:29 PM Page 45