Installation guide

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FIGURE 13 Typicaloilburner components
Flame Retention Burners
Most oil burners currently being manufactured
and installed are flame retention burners. The
name comes from the combustion heads which
are designed to hold-in or "retain" the flame.
High-speed motors are used to produce high air
pressures. This allows the burner to do a superior
job of mixing air and oil. An intense swirling
motion produces a compact, highly stable flame
which is held (retained) close to the burner head.
Flame gases are recirculated, to aid evaporation
of oil droplets and achieve cleaner, more
efficient combustion compared to non-flame
retention burners.
In most cases, your customers can obtain
substantially improved heating system efficiency
by replacing old non-flame retention burners with
new high-speed flame retention burners. Beckett
supplies a full line of these burners to accommo-
date a wide range of residential and conur_ercial
boilers and furnaces. See Chapter 6 for specific
burner recommendations.
Combustion Heads
The combustion head (also referred to as the
turbulator, fire ring, retention ring, or end cone)
creates a specific pattern of air at the end of
the air tube. The air is directed in such a way
as to force oxygen into the oil spray so the oil
can burn.
Flame Retention Heads vs.
Non-Flame Retention Heads
The majority of combustion heads in the field
today are flame retention heads. These heads
differ from the non-flame retention heads in that
the flame is held very close to the face of the
head. The flame is smaller and more compact,
and usually is 300°F to 500°F hotter than with
non-flame retention heads. (See Figure 15.)
The flame retention head incorporates three basic
elements: (1) center opening, (2) primary slots,
and (3) secondary opening. The center opening
is an orifice in the center of the head which
allows the oil spray and the electrode spark to
pass through the head. The primary slots are the
slots that radiate out from the center opening
toward the outside of the head. The secondary
opening is a slot which is concentric to the
center opening and follows the circumference of
the combustion head. All three openings affect the
way air is delivered to the oil spray.
Air Pattern- Non-Flame Retention Burner
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Air Pattern-FlameRetentionBurner
10 FIGURE14Burnerair patterns