AERCO Esteem O&M Manual - Manual (Page 17)

11
Combustion Air and Vent Piping
C
OMBINATION OF
I
NDOOR AND
O
UTDOOR
C
OMBUSTION
A
IR
Indoor Openings: Where used, openings con-
necting the interior spaces shall comply with
the Indoor Combustion Air section on page 9.
Outdoor Opening(s) Location. Outdoor
opening(s) shall be located in accordance with
the Outdoor Combustion Air section.
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 reduc-
tion factor. The minimum dimension of air
openings shall not be less than 3 in.
DANGER!
D
O NOT INSTALL THE
E
STEEM
399 L
OW
NO
X
INTO A COMMON VENT WITH OTHER GAS OR OIL
APPLIANCES
. T
HIS MAY CAUSE FLUE GAS SPILL
-
AGE OR APPLIANCE MALFUNCTION
,
RESULTING
IN POSSIBLE SEVERE PERSONAL INJURY
,
DEATH
OR SUBSTANTIAL PROPERTY DAMAGE
.
Combustion Air and Vent Piping
DANGER!
C
OMBUSTION AIR AND VENT PIPING
MUST
BE
SEALED GAS TIGHT AND MEET ALL PROVIDED IN
-
STRUCTIONS AND APPLICABLE CODES
,
FAILURE
TO COMPLY WILL RESULT IN SEVERE PERSONAL
INJURY OR DEATH
.
The Esteem 399 Low NOx requires a Category
IV venting system, which is designed for pres-
surized venting and condensate.
The Esteem 399 Low NOx is certified per
ANSI Z21.13 as a Category IV or Direct Vent
(sealed combustion) appliance. A Category
IV appliance utilizes uncontaminated indoor
or outdoor air (surrounding the appliance) for
combustion. A Direct Vent appliance utilizes
uncontaminated outdoor air (piped directly to
the appliance) for combustion.
Piping uncontaminated combustion air directly
from the outdoors to the appliance is recom-
mended. This reduces the risks associated with
indoor contaminates, flammable vapors and
tight housing construction. This practice also
promotes higher system efficiency.
N
OTICE
Install combustion air and vent pipe as
detailed in the Esteem 399 Low NOx
Vent Supplement included in the boiler
installation envelope. Refer to optional
vent kit instructions for addition vent in-
stallation instructions.
Removal of an Existing Boiler from a
Common Vent System
DANGER!
D O NOT INSTALL THE
E
STEEM
399 L
OW
NO
X
INTO A COMMON VENT WITH OTHER GAS OR OIL
APPLIANCES
. T
HIS MAY CAUSE FLUE GAS SPILL
-
AGE OR APPLIANCE MALFUNCTION
,
RESULTING
IN POSSIBLE SEVERE PERSONAL INJURY
,
DEATH
OR SUBSTANTIAL PROPERTY DAMAGE
.
N
OTICE
When an existing boiler is removed
from a common venting system, the
common venting system is likely to be
too large for proper venting of the re-
maining appliances.
At the time of removal of an existing boiler,
the following steps shall be followed with each
appliance remaining connected to the com-
GF-125