Connectionof combustionairpipingto theterminal
. DV.2000TM:
Refer to Part 1, section 5.3, Outdoor Combustion Air -
Side-wall Venting, DV-2000 TM for a complete
description.
5) AIR FOR COMBUSTION
Poison carbon monoxide gas hazard.
Comply with NFPA standard for the
installation of Oil Burning Equipment and
applicable provision of local building
codes to provide combustion and
ventilation air.
Failure to provide adequate combustion
and ventilation air can result in personal
injury and/or death.
5.1) General:
Oil furnaces must have an adequate supply of
combustion air. It is common practice to assume that
older homes have sufficient infiltration to accommodate
the combustion air requirement for the furnace.
However, home improvements such as new windows,
doors, and weather stripping have dramatically reduced
the volume of air leakage into the home.
Home air exhausters are common. Bath and kitchen
fans, power vented clothes dryers, and water heaters all
tend to create a negative pressure in the home. Should
this occur, the chimney becomes less and less effective
and can easily downdraft.
Heat recovery ventilation (HRV) systems are gaining in
popularity. The HRVs are not designed to supply
combustion air. tf not properly balanced, a serious
negative pressure condition could develop in the
dwelling.
5.2) Contaminated Combustion Air :
Installation in certain areas or types of structures will
increase the exposure to chemicals or Halogens which
may harm the furnace. These instances will require that
only outside air for combustion.
14
The following areas or types of structures may contain
or have exposure to the substances listed below. The
installation must be evaluated carefully as it may be
necessary to provide outside air for combustion.
a. Commercial building.
b. Building with indoor pools.
c. Furnaces installed near chemical storage areas.
Exposure to these substances:
a. Permanent wave solutions for hair.
b. Chlorinated waxes and cleaners.
c. Chlorine based swimming pool chemicals.
d. Water softening chemicals.
e. De-icing salts or chemicals.
f. Carbon tetrachloride.
g. Halogen type refrigerants.
h. Cleaning solvent (such as perchloroethylene).
i. Printing inks, paint removers, varnishes, etc..
j. Hydrochloric acid.
k. Solvent cements and glues.
I. Antistatic fabric softeners for clothes dryers.
m. Masonery acid washing materials.
5.3) Ducted outdoor combustion air:
Three burners are set up to duct outside combustion air
directly to the burner; the Beckett AFII and Riello 40-BF
for side-wall venting using the new DV-2000 TM venting
system, and the Beckett AFG for use with conventional
chimney venting. The Riello 40-F is not suitable for
direct-connected outdoor air.
CAUTION
The use of ducted outside combustion air is
mandatory for the DV-2000 TM venting system.
This system operates on a balanced flue
principle and will not function properly if the
combustion air piping is not attached and
sealed at all connections between the vent
terminal and burner inlet.
Outdoor combustion air kit - chimney venting:
The following kit has been certified for use on the
appliance. The component kits contain an important
safety feature, namely a vacuum relief valve, or VRV.
During normal operation the burner aspirates outdoor
air. If the intake terminal ever becomes partially blocked
or fully blocked from ice or snow etc., the VRV will open
to allow a proportion of air from the dwelling to enter the
burner thus maintaining proper combustion. Once the
blockage is removed, the VRV will close and the burner
will draw all air from the outdoors again:
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