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SECTION V: VENTING & AIR INTAkE PIPING
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
2. The safe venting of oil fired boilers is dependent 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 MegaSteam™ can be vented into a fireclay
tile-lined masonry chimney that meets requirements
outlined in Paragraph 4 below. It can also be vented
into a chimney constructed from type L vent or a
factory built chimney that complies with the type
HT requirements of UL 103. The chimney and
vent pipe shall have a sufficient draft at all times,
to assure safe proper operation of the boiler. See
Figure 15 for recommended installation.
WARNING
Do not de-rate the appliance. Failure to fire the
unit 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.
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.
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.
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 – the draft regulator supplied with
the boiler must be used with this appliance. No
other draft regulator shall be used. Refer to Figures
15 and 16.
B. CHIMNEY CONNECTOR
1. A chimney connector (vent pipe) is used to connect
the boiler to the base of the chimney. The chimney
connector should be kept as short as possible. The
horizontal length of the chimney connector shall not
be greater than 10 feet.
NOTE: Secure chimney connector to cast iron
smokebox collar with three (3) #10 x ½" self drilling
hex head TEK screws provided in appropriate
Parts Carton. Locate screws around perimeter of
connector as shown in Figure 15 and approximately
½" in from edge. Use drill with 5/16" hex bit to
drive screws through connector and smokebox
collar.
DANGER
The chimney and connector shall be inspected
annually for signs of debris and corrosion.
Loose mortar at the base of the chimney may be
a sign of condensate damage to the chimney.
A chimney professional shall be contacted
immediately to examine the damage and
recommend a solution. Long term operation
while in this condition may cause a venting
failure and force flue gases into the living
space. If the chimney is to be relined use the
recommendations in NFPA 31, Appendix E.
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