750-297
Profire E/LNE Series Manual
5-5
Maintenance
5.9 — Firing Rate Controls
Check all rods and linkages, Make sure all connections are tight. Adjust if necessary. Perform a combustion test as
explained in Chapter 4, and readjust the burner if necessary.
5.10 — 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. If leakage occurs, refer to
Chapter 2, Section 2.4, for proper sealing procedure.
5.11 — Fuel Oil System
5.11.1 — 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.
•
Low voltage applied to pump motor.
5.11.2 — Fuel Oil Strainers
Oil strainers should be cleaned frequently to maintain a free and full flow of fuel. The strainer screen must be removed
and cleaned at regular intervals. The screen should be removed and cleaned thoroughly by immersing it in solvent and
blowing it dry with compressed air. Light oil strainers should be cleaned each month.
NOTE:
It is essential that the cam spring, cam follower bearing wheel, and cam follower arm at the pivot point be greased
sparingly every month to ensure smooth operation of the cam assembly. Regular automotive bearing grease should be used.
NOTE:
Fuel oil sometimes will not leak out through a suction line joint when the burner is idle, but the same joint may
allow air leakage inward when a vacuum is created in the line by pump action. The cause of a pulsating burner fire can often
be traced directly to air leakage in the oil suction line. Always be sure the suction line joints are absolutely air tight.
Do not attempt field repair of the compressor. Installation of a new compressor is mandatory. Send the old compressor in for
repair or exchange (where allowed).
!
Caution
