Brochure

47
BOILERS
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.
Complies with
SCAQMD Rule
1146.2 and other Air
Quality Management
Districts with similar
requirements for
Low NOx emissions.
All non-heating
components are
outside of 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 for natural
gas (8˝ WC for propane)
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 extruded finned
copper tube heat
exchanger—vertical,
straight tube, two-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 AL29-4C
stainless steel that resists
corrosive flue gases
C
D
B
A E
F
E
B
C
F
G
D
D
G
A
AOSCA80000 R Oct 2011 Com Catalog:108078_ResidentialFul#7A635.qxd 10/28/11 5:52 PM Page 47