© Fulton Group N.A., Inc. 2022
2-22
INSTALLATION EDR-SOLA-IOM-2022-0216 SECTION 2
! WARNING
Do not terminate venting into an
enclosed area.
Never use open ame or smoke from
a cigarette, cigar, or pipe as a testing
method during boiler installation,
operation, or maintenance.
Foreign substances, such as
combustible volatiles in the
combustion system can create
hazardous conditions. If foreign
substances can enter the air stream,
the boiler combustion air inlet must
be piped to an outside location.
Adhere to the following venting requirements:
1. This boiler can operate to the combined intake and ue exhaust pressure
drops without altering standard capacities: See Table 4.
2. The combined venting system draft pressure readings at the boiler exhaust
connection and air intake connection cannot exceed the maximum
values stated in Table 4; and must remain relatively stable throughout all
operating conditions, including the ignition sequence.
NOTE: Venting pressure is the combined result of frictional pressure drop and
natural draft (stack eect) in the combustion air intake piping (if used) and ue
gas exhaust system.
3. Drastic draft changes during operation may result in the generation of
excessive carbon monoxide or soot, which may aect operational reliability
and condition of burner, ignition assembly, or other combustion system
components leading to increased maintenance or replacement of these
items.
4. The equivalent length method is not a substitution for good engineering
practices for determining acceptability of a vent system due to varying
burner modulation rates, ambient air temperatures, and ue gas
temperatures, among other factors. Combustion air intake piping (if used)
must be accounted for in an analysis of the venting system.
5. If the maximum positive pressure loss is exceeded, the boiler may have
to be de-rated or require the installation of draft accessories such as
an engineered exhaust assist fan to prevent operational issues from
occurring. If the maximum negative pressure is exceeded due to excessive
natural draft (stack eect), the exhaust system may require the use of
draft accessories such as a xed-position balancing bae or modulating
overdraft damper. Draft accessories must be appropriate for Category II/
IV installations and are not included with the boiler. Consult your venting
supplier for recommendations.
6. Adhere to local and jurisdictional codes and regulations, which may dier
from recommendations and diagrams contained in this manual.
7. Site specic conditions not addressed in this manual may require
additional precautions or design considerations. Consult your local Fulton
Representative and venting supplier for recommendations.
NOTE: Consult your venting pipe supplier for assistance with sizing of vent
materials and other potentially required accessories.
8. The layout of the piping used for air intake and exhaust must be done in a
way that facilitates smooth travel and natural ow.
9. A pressure drop calculation is an acceptable method for evaluating
theoretical draft, but is not enough information to fully validate
combustion air intake and ue gas exhaust vent systems. The designer and
installer must use good practice and remain cognizant of important factors
that cannot be captured by a pressure drop calculation such as local code
requirements, accessibility for inspection and maintenance, aesthetic
concerns, ue gas recirculation, stagnant vapor plumes, prevailing wind
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