AERCO Esteem Boiler with EZ-Set Controller - Manual (Page 25)

GF-135
Esteem 399 Low NOx Boiler Chapter 2
OMM-0089_0A
Installation, Operation & Maintenance Manual Combustion Air/Venting
3.6 COMBINATION OF INDOOR AND OUTDOOR COMBUSTION AIR
Indoor Openings: Where used, openings connecting the interior spaces shall comply with the
Indoor Combustion Air section 3.5.
3.6.1 Outdoor Opening(s) Location
Outdoor opening(s) shall be located in accordance with the Outdoor Combustion Air section.
3.6.2 Outdoor Opening(s) Size
Outdoor opening(s) shall be calculated in accordance with the following:
• The ratio of the interior spaces shall be the available volume of all communicating spaces
divided by the required volume.
• The outdoor size reduction factor shall be 1 minus the ratio of interior spaces.
• The minimum size of outdoor opening(s) calculated in accordance with the above outdoor
air section multiplied by the reduction factor. The minimum dimension of air openings
shall not be less than 3 in.
WARNING!
Do not install the Esteem boiler into a common vent with other gas
or oil appliances. This may cause flue gas spillage or appliance
malfunction, resulting personal injury, death, and/or property
damage.
3.7 COMBUSTION AIR AND VENT PIPING
WARNING!
Combustion air and vent piping must be sealed gas tight and meet
all provided instructions and applicable codes, failure to comply
will result in severe personal injury or death.
The Esteem boiler requires a Category IV venting system, which is designed for pressurized
venting and condensate.
The Esteem boiler is certified per ANSI Z21.13 as a Category IV or Direct Vent (sealed
combustion) appliance. A Category IV appliance uses uncontaminated indoor or outdoor air
(surrounding the appliance) for combustion. A Direct Vent appliance uses uncontaminated
outdoor air (piped directly to the appliance) for combustion.
Piping uncontaminated combustion air directly from the outdoors to the appliance is
recommended. This reduces the risks associated with indoor contaminates, flammable vapors
and tight housing construction. This practice also promotes higher system efficiency.
NOTE
Install combustion air and vent pipe as detailed in the Esteem
boiler Vent Supplement included in the boiler installation
envelope. Refer to optional vent kit instructions for addition vent
installation instructions.
Page 25 of 188 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0089_0A
MC1 06/19/14 Ph.: 800-526-0288