ENGINEMAN 1 & C
Symptom
or Difficulty
Ignition
failure
Flame
failure
Burner
smokes or
pulsates
Oil pump
fails to
deliver
Condition may be due to
Faulty transformer.
Broken or grounded high tension
leads.
Cracked high tension electrode
insulator.
Carbon deposits on electrodes
or insulators.
Incorrect electrode setting.
Malfunctioning programing con-
trol cams.
Faulty ignition cable connector.
Solenoid oil or air valve fails to
open.
Water in the oil.
Dirty or clogged burner tip.
Dirty glass in the photocell.
Abnormal ambient temperature.
Bad electron tube in the photo-
cell.
Damaged photocell.
Faulty electron tube in the com-
bustion safeguard control.
Loose connection on the photo-
cell.
Out of oil or have water in the
oil.
Clogged fuel oil nozzle.
Clogged fuel oil line or strainer.
B r o k e n p r e s s u r e r e g u l a t o r
spring.
Faulty solenoid valve.
Broken belt (V-belt drive).
Dirty nozzle.
Excessive return line oil pres-
sure (return flow system).
Nozzle not positioned correctly.
Insufficient air for combustion.
Low oil pressure.
Incorrect burner linkage set-
ting.
Incorrect setting of primary air.
Low voltage (d-c machinery).
Fluctuating voltage.
Leak in the suction line.
Insufficient fuel in the tank.
Clogged or dirty strainers.
Worn pump members.
Symptom
or Difficulty
Oil pump
fails to
deliver
(continued)
Blower fails
to deliver
Feed pump
fails to
deliver
Excessive
vibration
Condition may be due to
Improper oil relief valve set-
ting.
Defective gasket on the oil pump.
Leaky pump seal.
Slipping V-belts.
Driver pulley loose on the shaft.
Misalignment.
Dirty fan blades.
Restriction at the blower inlet.
Seized bearings in the blower or
the blower drive.
Bent or broken shaft.
Dirty air inlet screen.
Insufficient
supply
voltage
to
motor (d-c machinery).
Fluctuating voltage.
Dirty suction strainer.
A b n o r m a l l y h i g h w a t e r t e m -
perature.
Leak in the suction line.
Pump packing gland leaks badly.
Plugged inlet piping.
Excessive discharge head.
Slipping or broken drive coup-
ling.
Jammed pump impeller.
Dirty water level relay contacts
(electrode - probe type con-
trol).
Malfunctioning pump time delay
relay. Grounded water probes
(electrode - probe type con-
trol).
Pump vapor locked.
Insufficient water supply.
Reversed rotation.
Wornout impeller.
Defective water pressure gage.
Combustion pulses.
Loose hold-dorn bolts.
Badly worn bearings.
Insufficient air to the burner.
Loose mechanical fastings.
Misalignment of rotating auxil-
iaries.
Dynamic unbalance of rotating
auxiliaries.
Figure 7-2.Troubleshooting guideauxiliary boilers.
7-8
121.21
