A.O. Smith VF Series Boiler User Manual


 
Combustion
air intake – self
adjusting-no air
shutter required
EMC-5000
Modulating Control
Advanced pre-mix
burner design
precisely mixes
air and gas prior to
ignition for optimum
performance, with
low-NOx emissions
(meets SCAQMD
Rule 1146.2)
All non-heating
surface heat
exchanger compo-
nents ar
e outside
and away from the
combustion and flue
collection areas;
only the copper fin
tubes are exposed
to the products of
combustion
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 pr
oviding
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 immune to
thermal shock
The sealed heat
exchanger flue collection
system is constr
ucted
of AL29-4C stainless
steel that is immune
to cor
r
osive flue gases
C
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THE ANATOMY OF GREAT PERFORMANCE
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