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2.6
BLOCKED VENT SHUT-OFF
DEVICE (BVSO) FOR CHIMNEY
VENTING
CAUTION
It is imperative that this device be installed by a qualified service
technician.
A positive pressure venting system (Sealed Combustion System or
Direct Vent) MUST NOT use the BVSO. Follow the instructions
supplied with the venting system.
This device is designed to detect the insufficient evacuation of
combustion gases in the event of a vent blockage. In such a case the
thermal switch will shut down the oil burner. The device will then need
to be re-armed MANUALLY.
Refer to the detailed instructions and wiring diagrams supplied with
the BVSO for the installation and wiring procedures. The length of
wires supplied with the unit is such that the safety device must be
installed between the flue outlet of the appliance and the draft
regulator, as indicated in the instructions.
It is also essential that the BVSO be maintained annually. For more
details refer to the instructions supplied with the device itself, as well
as Section 3 of this Manual.
2.6.1
BVSO Performance Test
The purpose of the following test is to check that the electrical outlet
on the furnace, designated to the BVSO, is functional.
1.
Start up the burner;
2.
Remove the three-pole plug from the BVSO outlet on the
furnace;
3.
The burner must shut-off immediately, while the blower continues
to run to the end of the cool-down cycle.
If the test is not in line with the above, call a QUALIFIED SERVICE
TECHNICIAN.
2.7
COMBUSTION AIR SUPPLY AND
VENTILATION
WARNING
Poisonous carbon monoxide gas hazard.
Comply with NFPA 31 (U.S.) and CSA B139 (Canada) standards for
the installation of Oil Burning Equipment and applicable provisions of
local building codes to provide combustion and ventilation air.
Failure to provide adequate combustion and ventilation air can result
in death, bodily injury and/or property damage.
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 drastically reduced the volume of air
infiltration into the home.
Refer to oil furnace installation codes relative to combustion and
ventilation air requirements. Consult Section 2.1 in this manual,
specifically for units installed in an enclosed space.
Home air exhausters are common. Bathroom and kitchen fans, power
vented clothes dryers and water heaters all tend to create a negative
pressure condition in the home. Should this occur the chimney
becomes less and less effective and can easily downdraft. In certain
cases, mechanically supplied air, by way of a blower, interlocked with
the unit, is necessary. It is the installer's responsibility to check that.
2.7.1
Contaminated Combustion Air
Installations in certain areas or types of structures will increase
the exposure to chemicals or halogens that may harm the
furnace. These conditions will require that only outside air be
used for combustion.
The following areas or types of structures may contain or be
exposed to certain substances, potentially requiring outside air
for combustion:
a.
Commercial buildings;
b.
Buildings with indoor pools;
c.
Furnaces installed near chemical storage areas.
Exposure to the following substances:
a.
Permanent wave chemicals 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 solvents (such as perchloroethylene);
i.
Printing inks, paint removers, varnishes, etc. ;
j.
Hydrochloric acid;
k.
Solvent based glue;
l.
Antistatic fabric softeners for clothes dryers;
m.
Acid based masonry cleaning materials.
2.7.2
Burner with Outdoor Combustion Air Kit
Certain burners are designed to function with combustion air
taken directly from the outside. Follow the instructions provided
with the burner, the fresh-air supply kit or the side-wall venting
kit.
2.8
OIL TANK
WARNING
Fire and explosion hazard.
Use only approved heating type oil in this furnace. DO NOT USE
waste oil, used motor oil, gasoline or kerosene.
Use of these will result in death, bodily injury and/or property
damage.
CAUTION
When a 0.75 USGPH or smaller nozzle is used, a 10 micron or
finer filter, must be installed on the oil supply line to the furnace
inside the building where the unit is located.
This is a requirement in order for the heat exchanger warranty to
remain in force.
Check your local codes for the installation of the oil tank and
accessories.
At the beginning of each heating season or once a year, check
the complete oil distribution system for leaks.
Ensure that the tank is full of clean oil. Use No.1 or No.2 Heating
Oil (ASTM D396 U.S.) or in Canada, use No.1 or No.2 Furnace
Oil.
A manual shut-off valve and an oil filter shall be installed in
sequence from tank to burner. Be sure that the oil line is clean
before connecting to the burner. The oil line should be protected
to eliminate any possible damage. Installations where the oil tank
is below the burner level must employ a two-pipe fuel supply
system with an appropriate fuel pump. A rise of 2.4 m (8') and
more requires a two stage pump and a rise greater than 4.9 m
(16') an auxiliary pump. Follow the pump instructions to
determine the size of pipe needed in relation to the rise or to the
horizontal distance.
6
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