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Profire EV/LNEV Burner
1.
First remove the electrode leads, the gas pilot assembly,
air and oil tubes before you attempt to remove the dif-
fuser.
2.
Remove the three screws holding the diffuser to the
blast tube and slowly pull the diffuser along the blast
tube towards the firing head.
3.
Clean all carbon from the diffuser vanes and reinstall in
reverse order of disassembly.
4.
When reinstalling, be sure the diffuser is centered with
the proper distance.
Burner Mounting Inspection
The seal between the burner flange and furnace front plate
must not permit combustion gases to escape. Periodic
inspection is important. Replace the gasket if necessary.
Inspect the burner head for signs of discoloration. A change
the head color paint might indicate gas leakage between the
dry oven and the boiler refractory.
Fuel Oil System - Fuel Oil Circulating Pump
Failure of the circulating pump to deliver sufficient oil may
be due to one of the following reasons:
Insufficient fuel oil in the storage tank.
Suction line or check valve clogged.
Air leaks or air traps in the suction line. If the line has a high
point at which an air trap can occur, the line must be changed.
Oil strainer clogged (line strainer or burner strainer).
Suction line piping too small (see Chapter 2).
Pump rotating in wrong direction.
Three-phase pump motor operating on single-phase because
of fuse failure.
750-364
Low voltage applied to pump motor.
AIR COMPRESSOR
The air pump itself requires little maintenance. However, the
life of the pump is dependent upon a sufficient supply of
clean cool lubricating oil. The oil level in the air-oil tank must
be observed closely. Lack of oil will damage the pump
making replacement necessary. Disassembly or field repairs
to the pump are not recommended.
DIFFUSER
Compressor Lube Oil
Lubricating oil must be visible in the sight glass at all times.
There is no specific level required as long as oil is visible. Do
not operate if oil is not visible.
Oil with proper viscosity must be used. SAE 20 detergent is
recommended, although SAE 10 detergent is also
permissible.
When adding oil, remove the cover from the fill pipe and add
oil through the conical strainer in the pipe with the unit
running.
The oil and its container should be clean. Although there is a
strainer in the lube oil line, its purpose is to remove any
unwanted materials rather than to act as a filter for unclean
oil.
Oil must NEVER be added unless the pump is in
operation and the strainer screen is in place. Failure to
follow these instructions could result in equipment
damage.
Chapter 2
Caution
!
2-9
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