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SECTION VI: NATURAL DRAFT VENTING (CHIMNEY)
Vent this boiler according to these instructions. Failure to do so may cause products of combustion to
enter the home resulting in severe property damage, personal injury or death.
Insufficient Combustion Air Supply may result in the production and release of deadly carbon
monoxide (CO) into the home which can cause severe personal injury or death.
Improper venting may result in property damage and the release of flue gases which contain deadly
carbon monoxide (CO) into the home, which can cause severe personal injury, death, or substantial
property damage.
Inspect existing chimney and vent connector for obstructions and deterioration before installing
boiler. Failure to clean or replace perforated pipe or chimney liner will cause severe injury or death.
Do not de-rate the appliance. Failure to fire the boiler at it's designed input may cause excessive
condensation upon the interior walls of the chimney. In addition, the lower input may not create
enough draft to adequately evacuate the by-products of combustion.
A. CHIMNEY VENTING
1. Chimney venting is an important part of a safe
and efficient oil fired appliance system. Contact
your local fire and building officials on specific
requirements for restrictions and the installation of
fuel oil burning equipment. In addition, consult with
a professional knowledgeable on the requirements of
NFPA 31 – Standard for the Installation of Oil-Burning
Equipment and NFPA 211 - Standard for Chimneys,
Fireplaces, Vents, and Solid Fuel-Burning Appliances
for installations in the United States. Installations
in Canada must be reviewed with a professional
knowledgeable on the requirements of CSA B139 –
Installation Code for Oil-burning Equipment.
2. The safe venting of oil fired boilers is dependant on
many factors. Some of these factors include:
a. sufficient draft during the entire heating season
to allow for the safe discharge of combustion by-
products and;
b. suitable corrosion protection in the event of
condensing flue gases. Only a trained and qualified
contractor may install this product.
3. The CI-HGS-B shall be vented into any of the
following:
a. Masonry or metal chimney. Build and install in
accordance with local buildings codes; or local
authority having jurisdiction; or "Standards
for Chimney, Fireplace, Vents, and Solid Fuel
Burning Appliances", ANSI/NFPA 211 and/or
National Building Code of Canada. Masonry
chimney must be lined with listed chimney
system. Listed clay flue lined masonry chimneys
meet venting requirements.
•
External chimneys are more susceptible to
flue gas condensation due to colder outside
air temperatures. To prevent corrosion
due to flue gas condensation, use a listed
corrosion-resistant metal liner in chimney.
24
WARNING
•
4. Chimney Inspection – Prior to the installation of
any new or replacement fuel burning equipment the
chimney shall be inspected by a qualified installer.
The chimney shall be inspected for integrity as
well as for proper draft and condensate control.
Some jurisdictions require the use of a liner when
changing fuel types. Some jurisdictions require
the use of a liner even when the same fuel is used.
At a minimum, the chimney shall be examined
by a qualified person in accordance with the
requirements of Chapter 11 of NFPA 211, Standard
for Chimneys, Fireplaces, Vents, and Solid Fuel-
Burning Appliances.
a. Loose Mortar – Loose mortar could be an indication
of a prior history of condensing flue gases upon
the inside walls of the chimney. Colder climates
are more susceptible to this condition. Under no
circumstances shall a chimney of this condition be
used until it meets the requirements of NFPA 211
or CSA B139.
b. Unlined Chimney – Under no circumstances shall
a chimney constructed of brick only be used. Only
approved clay liners or listed chimney lining systems
shall be used as specified in NFPA 31 or CSA B139.
c. Abandoned Openings – Openings through the
chimney wall that are no longer used shall be sealed
in accordance to NFPA 211. Often abandoned
openings are improperly sealed and usually covered
by a gypsum wall covering.
d. Clean Chimney – Chimney shall be free of all loose
debris.
5. Draft Regulator – a draft regulator (not supplied with
boiler) must be used with this appliance. Refer to
Figures 13 and 14.
Oversized chimneys are more susceptible
to flue gas condensation. To reduce the
likelihood of flue gas condensation and
ensure proper draft, use a properly sized
listed metal liner in oversized chimney.
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