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2.3.3- 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, and the
Beckett AFG for use with conventional chimney venting. The Riello 40F
is not suitable for direct-connected outdoor air.
CAUTION
The use of ducted outside combustion air is mandatory for
side wall 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 kits
– chimney venting
The following kit has been certified for use on this appliance. The kit
contains 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.
CAS-2B
Components (except air duct) for the Beckett AFG burner: The
kit includes the intake terminal, vacuum relief valve (VRV) and special
air boot connection with integral air adjustment means for the AFG
burner. The CAS-2B can be used with a 101.6 mm (4") galvanized steel
air duct or with a 101.6 mm (4") flexible aluminium air duct. It is
recommended that the metallic air ducting material be insulated from the
air intake up to 1.5 m (5') from the burner, to avoid condensation on the
outside of the intake pipe.
CAUTION
The CAS-2B does not turn the furnace installation into a
direct vent system. Therefore, the building structure must
provide for adequate combustion air to be delivered
to the
Vacuum Relief Valve.
The burner will need to draw
combustion air from the VRV’s surroundings if the intake
ever becomes blocked. Therefore, non-direct vent
installation codes must be followed.
CAD-1
This air duct kit consists of 7.6 m (25') of insulated UL/ULC
Listed Class 1 air duct and two 101.6 mm (4") steel band clamps. The
duct incorporates a corrugated flexible aluminium core, surrounded by
fibreglass insulation and a vinyl vapour barrier.
Comprehensive installation instructions are provided with the kit.
2.4- OIL TANKS AND LINES
Check your local codes for the installation of the tank and accessories.
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 having the fuel oil tank below burner level must
employ a two pipe fuel supply system with an appropriate fuel pump. For
more than a 2.4 m (8') rise use a 2 stage pump; for more than a 4.9 m
(16') rise, an auxiliary pump.
Follow the pump instructions to determine the size of pipe you need in
relation to the rise, or the horizontal distance.
At the beginning of each heating season or once a year, check the
complete oil distribution system for leaks.
2.4.1- BURNER INSTALLATION
Mounting the burner
1.
The warm air furnace burner mounting plate has a 4-bolt
configuration;
2.
Position the mounting gasket between the mounting flange and the
appliance burner mounting plate. Line up the holes in the mounting
flange with the studs on the appliance mounting plate and securely
bolt in place.
After the burner is mounted
1.
Remove drawer assembly or air tube combination;
2.
Install nozzle (see specifications);
3.
Confirm electrode settings;
4.
Make the electrical connections;
5.
Complete oil line connections.
CAUTION
Do not turn on the burner until you have checked:
Checking the polarity
Oil burners used on furnaces have solid state control systems which
make them sensitive to the proper connections of the hot and neutral
power lines. The controls will be damaged if the 2 lines are reversed.
1.
Set your voltmeter to line voltage;
2.
Place one prong on your grounded electric entry box and one prong
on the black wire;
3.
Read the voltage;
4.
If the voltage is zero, check the white wire. If line voltage shows,
reverse the 115-volt leads entering the furnace junction box;
5.
If you do not have a voltmeter, use a pilot light.
Figure 1: Checking the polarity
Checking the nozzle
The burner is equipped with an appropriate nozzle. However, if another
size or a replacement nozzle is required, use the manufacturer’s nozzle
data concerning spray angle, as shown in Table 4. Note that all nozzle
sizes are based on a pump pressure of 100 PSI.
Always select nozzle sizes by working back from the actual desired flow
rate at operating pressure, and not by the nozzle marking.
DNS-0864 Rev. A
