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Chapter 2
depending on the grade of oil burned and the cleanliness of
the environment.
Pilot and Ignition Electrode
The ignition transformer requires little attention other than
making sure the ignition wire is firmly attached to the
transformer and the electrode. Be sure the wire insulation is
in good condition and not grounded. Failure to keep the
ignition electrode clean and properly set can cause faulty
operation. The pilot assembly is supported by a socket in the
diffuser and gas inlet tube. No adjustment is required except
proper positioning of the electrode wire.
Flame Scanner
The scanner must be clean. Even a small amount of
contamination will reduce the flame signal. Wipe the scanner
lens with a clean soft cloth.
Oil Nozzle
Successful burner operation requires using the proper nozzle
tip and keeping the orifice clean. Standard nozzle tips
furnished on the burners are of a special emulsifying type
which delivers a spray of extreme fineness and at an angle
which insures proper mixing with the air stream.
Unsatisfactory performance and loss of efficiency can result
from the use of nonstandard nozzle tips. If the burner flame
becomes stringy or lazy, it is possible that the nozzle spring is
not properly in place or the nozzle is clogged. This problem
is usually indicated by an abnormally high reading on the
atomizing air pressure gauge on the air-oil tank. To remove
the nozzle:
1.
Disconnect the oil and air tubes to the nozzle assembly.
Loosen the three 1/4" screws holding the nozzle spider
2.
bracket to the diffuser.
2-8
3.
Withdraw the nozzle and bracket assembly.
To clean the nozzle tip and swirler:
1.
Unscrew the tip from the nozzle body. Use care not to
distort the tube.
2.
Hold the nozzle body in a vise or use two wrenches, one
on the body and one on the tip.
3.
Disassemble the nozzle tip.
4.
Carefully clean all parts in solvent and reassemble the
nozzle.
To insure proper atomizing, the tip must be screwed in tightly
with the swirler seating spring pressing the swirler tight
against the nozzle tip. Turn the swirler a few times to be sure
it fits snugly in the nozzle and the spring is pressing the two
parts firmly together. When reinstalling, be sure the nozzle is
centered with the proper distance from the diffuser.
Do not attempt to use wire or a sharp metal tool to
clean the nozzle orifice as this will distort the fine
orifices and ruin the nozzle. Use a sharp pointed piece
of soft wood.
Diffuser
The diffuser is factory set and does not require attention under
normal operating conditions. If fouled with carbon, the
diffuser should be removed for cleaning:
PILOT ELECTRODE GAP
Profire EV/LNEV Burner
!
Caution
750-364
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