General Information
Power Flame Type C oil burners are of the pressure
atomizing forced draft type, using a single simplex or
bypass type nozzle system. On/Off burners use a simplex
nozzle. Fixed air low fire start burners use a simplex nozzle
with a bypass valve to allow reduced oil nozzle pressures
at light off. Low/High/Off and Low/High/Low burners have
movable air dampers and may use a single simplex or
bypass type oil nozzle with a bypass valve to allow reduced
oil pressures at light off and at low fire. Modulating burners
have movable air dampers and use a single simplex or
bypass type oil nozzle with a proportioning metering valve
in the nozzle return line to allow modulated fuel inputs from
low to high fire.
Some applications may require the burner to function at the
low end of its rated capacity. As a result, the two combustion
air inlets may supply more air than is required for efficient
combustion. It may therefore be desirable to operate the
system using only one combustion air inlet and one
combustion air inlet damper.
Notice
Refer to page 23 General Start Up Procedures - All Fuels and Section 3 for mechanical operation detail of specific mode of
operation. Combination Gas/Oil systems should also refer to page 23, Information on Fuel/Air Modes of Operation for Combination
Gas/Oil Units.
This may be accomplished by removing cross connecting
linkage between dampers and locking the unused
damper in a fixed position.
One way of locking the damper is to use a 10-24 machine
screw through the hole in the linkage arm, and drill and
tap the air inlet housing or use two nuts on the screw and
let the screw bear against the air inlet housing.
Air diffuser movement (fore and aft) may be necessary to
produce the best flame pattern or smoothest operation.
See page 22, Gas, Oil or Gas/Oil Burners Diffuser
Adjustment, for further information.
Gas and Gas/Oil burners for Scotch marine and other
selected applications incorporate a gas/air premix
adjustment. This adjustment is identified by diametrically
opposed adjustment knobs on the blast tube. See page 22,
Gas or Gas/Oil Burner and Fuel/Air Premix Adjustment for
further information.
Burner Start Up Sequence
1. Check oil and gas piping (if applicable) for leaks, and
check all controls for compliance with codes and
insurance requirements.
2. Check all linkages. If the system is a packaged burner/
heat exchanger system, the linkage was probably set
when the system was fire tested at the heat exchanger
manufacturing factory. It should, however, be checked
to ensure that it was not damaged in shipment. If the
system is a conversion unit (burner and heat exchanger
are mated in the field), the linkage will have to be set
to suit the particular operating conditions.
3. Do not secure flame safeguard control into its wiring
base until it has been determined that there are no
shorts or grounds in the system.
4. Install oil pressure and vacuum gauges. See Section 3
for mechanical operation and oil gauge location for the
specific system. Check suction line to be sure manual
valve is open and that check valves are opening in the
proper direction of oil flow. Check oil filter for tightness.
There should be no manual valve in the return line from
pump to tank.
5. Direct Spark Oil Ignition. Remove oil nozzle gun and
check electrode settings and ensure that oil nozzle size
is correct. Electrode gap should be approximately
1
/
8
" and set forward to correspond with the nozzle spray
angle. Do not set electrodes so that oil can impinge on
them. See pages 35 and 36 for detailed information on
oil ignition systems.
6. Gas Pilot Oil Ignition. Remove the pilot assembly and
check for the proper setting of the ignition electrode
spark gap. Install a manometer or 0-10" W.C. gas
pressure gauge in the pilot gas pressure test port. See
page 39 for details on gas pilot adjustments. Disconnect
the pilot gas line at the inlet to the pilot gas pressure
regulator and bleed air out of the pilot line.
Make certain that the gas pressure to the pilot regulator
does not exceed the regulator or pilot solenoid valve
rating. When bleeding air from the pilot line system,
do not allow the venting of gas into the room.
7. Install required systems measuring devices:
A) appropriate flame signal meter to the flame
safeguard control
B) stack thermometer, CO
2
and Smoke Test sample
line in the breaching
C) draft gauge to the combustion chamber test
point
8. With the burner panel control switch in the Off
position, apply power to the burner through the main
burner disconnect switch. Switch the burner panel
On/Off switch to the On position momentarily to
determine that the blower motor (and separate oil
pump set motor, if supplied) is running in the right
rotation.
9. Appropriate steps must be taken to transfer the oil
from the tank to the burner. It is imperative that the
system be primed prior to operation. The system
priming may be achieved by closing the manual
valve in the oil suction line and priming the oil pump
through the pump gauge pressure port. Priming can
also be accomplished through the oil filter on the
suction line, if it is of the removable top type. When
replacing the oil filter cap, be sure to attain a vacuum
tight seal. Start the burner with the suction line manual
valve closed. Let the burner run until the vacuum
gauge indicates a high vacuum, then quickly open
the manual valve in the suction line. This combination
of priming and high suction should pull the oil from
the tank to the burner, provided that there are no
leaks and the line is properly sized. See page 12
Figure 10 for proper line size.
10. Refer to the burner wiring diagram and flame
6. OIL START UP
C28
Rev.304
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