Description; Low-High-Low (Step-Modulation) Firing; Assemble Pedestal - Carlin Flame Funnel 1050FFD Installation And Operating Instructions Manual

Description

Model 1050FFD and Model 1150FFD Flame-Funnel oil
burners for use with No. 2 fuel oil are low-high-low (step
modulating) high speed flame retention burners. Oil flow
rate is step-modulated by the use of two oil valves and
three nozzles, low-fire from the first nozzle and high-fire
added by the second and third nozzles firing simultaneous-
ly. Combustion air is controlled by a damper motor. Its end
switch energizes the second-stage valve as the air shutter
opens.
Due to the low-high-low feature of these burners they are
very versatile and efficient.
1. They can operate in forced draft boilers or furnaces at
pressures up to 0.50 inches W.C.
2. They will save typically, 20% in seasonal fuel consump-
tion compared to conventional single-stage flame reten-
tion burners.
3. They can operate with or without refractory lined com-
bustion chambers.
4. They are superior for process applications.
5. They can be installed through fire door openings.
Low-High-Low
(step-modulation) firing
Advantages: There are several strong advantages to low-
high-low firing in both heating and process applications:
1. Smooth ignition both in natural and forced draft opera-
tions.
2. Closer control than with a single input.
3. Less strain or wear on the burner, boiler and combustion
chamber components:
a. Longer cycles.
b. Gradual changes; less thermal shock.
4. Lower fuel consumption:
a. Higher efficiencies of both low and high-fire.
b. Lower stand-by loss due to longer ON cycles and to
the closed air damper during OFF cycles.
Operation: A true low-high-low burner controls both air and
oil flow rates. A low-fire start burner (low-high-off) controls
only the oil rate and has a fixed air setting with none of
the preceding advantages. The low-high-low burner cycle
operates as follows:
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1. Call for heat. Burner motor and ignition are energized. Air
is in the low-fire position. The low-fire oil valve admits oil
to the low-fire nozzle and its spray ignites, burning clean
with proper air/fuel ratio.
2. If demand exceeds low-fire, the damper motor is en-
ergized through a high-fire operating control (aquastat,
airstat, pressuretrol, or outdoor thermostat). As the
damper motor approaches a wide open position, the
auxiliary end switch energizes the high-fire valve and the
full fire with open air, burns clean with high C0
efficiency.
3. As the high-fire input begins to exceed the demand of
the high-fire operator, the operating control opens to
de-energize the damper motor. As the damper motor
returns the air shutter to low-fire the auxiliary end switch
in the damper motor opens and de-energizes the high-
fire valve.
4. If the demand exceeds low-fire, the high-fire operating
control would again call for more heat as in Step 2 and
then followed by Step 3.
5. If, after returning to low-fire, the load should drop to
below the low-fire output, the operating limit would shut
off the burner completely.
Both models are completely pre-wired and fire-tested at
the factory. Photocells are factory-mounted in air tube.
Self-checking ultraviolet detectors, miniature UV and lead
sulphide detectors are assembled to the factory-located
nipple on the burner-mounting flange.
Unpacking
Remove form-in place top which will expose assembled
burner and pedestal carton. Note that primary control is
mounted to burner. Carefully lift entire burner from carton.
BE CAREFUL NOT TO BEND OIL LINES AND DO NOT
PULL WIRING HARNESS WHEN LIFTING BURNER.
Assemble Pedestal (when used)
1. Carefully tip burner back on housing to expose pedestal
mounting hole.
2. Fasten pedestal to mounting block. The pedestal height
is adjustable from 10¾" minimum to 13½" maximum to
centerline of air tube.
3. Tighten at desired height.
and high
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