Lennox O23 User Manual

Page 35
Burner starts, but no flame is established.
Source Procedure Causes Correction
Check tank gauge or use dip
stick.
No oil in tank Fill tank.
Oil Supply
Coat dip stick with litmus paste
and insert into bottom of tank.
Water in oil tank
If water depth exceeds 1 inch,
pump or drain water.
Listen for pump whine. Tank shut−off valve closed Open valve.
Oil line filter is plugged Replace filter cartridges.
Listen for pump whine.
Kinks or restriction in oil line Repair or replace oil line.
Oil Filters & Oil Line
pp
Plugged fuel pump strainer Clean strainer or replace pump.
Oil
Filters
&
Oil
Line
Open bleed valve or gauge port.
Start the burner No oil or milky
Air leak in oil supply line
Locate and correct leak.
S
tart t
h
e
b
urner.
N
o o
il
or m
ilk
y
oil indicates loss or prime.
Ai
r
l
ea
k
i
n o
il
supp
l
y
li
ne
Tighten all connections.
Oil P
Install pressure gauge on pump
d d Sh ld t
Pump is partially or completely
frozen. No pressure and the
motor locks out on overload.
Replace pump.
Oil Pump
pggpp
and read pressure. Should not
be less than 140 psi.
Coupling disengaged or broken
− no pressure
Re−engage or replace coupling.
Fuel pressure too low Adjust to 100 psi.
Disconnect ignition leads. Ob
serve the oil s
p
ra
y
(g
un assem
Nozzle orifice plugged
Replace nozzle with the same
Nozzle
serve
the
oil
spray
(gun
assem
bly must be removed from unit).
Inspect the nozzle for plugged
Nozzle strainer plugged
Replace nozzle with the same
size, spray angle, and spray
type
Inspect
the
nozzle
for
plugged
orifice or carbon build−up around
orifice.
Poor or off center spray
t
ype.
Fouled or shorted electrodes
Clean electrode leads
Dirty electrodes and leads
Cl
ean e
l
ec
t
ro
d
e
l
ea
d
s.
Eroded electrode tips
Cl l t d ti d t
Improper electrode gap spacing
Clean electrode tips and reset
the
g
a
p
to 5/32 inches and cor
Ignition Electrodes
Remove gun assembly and in
spect electrodes and leads.
Improper position of electrode
tips
the
gap
to
5/32
inches
and
cor
rectly position tips.
Bad buss bar connection Retension and realign.
Cracked or chipped insulators Replace electrode.
Cracked or burned lead insula
tors
Replace electrode leads.
I iti
Connect ignition leads to the
tf Sttb db
Low line voltage
Check voltage at power source.
Correct cause of voltage drop
or call the power company.
Ignition
Transformer
g
transformer. Start burner and ob
serve spark. Check line voltage
to transformer primary.
Burned out transformer wind
ings.
Replace the transformer.
to
transformer
primary
.
No spark or weak spark
Properly ground the transformer
case.
BMt
Motor does not come up to
speed and trips out on overload.
Tff dttbl
Low line voltage
Check voltage at power source.
Correct cause of voltage drop
or the call power company.
Burner Motor
pp
Turn off power and rotate blower
wheel by hand to check for bind
ing or excessive drag
Pump or blower overloading
motor
Correct cause of overloading.
ing
or
excessive
drag
.
Faulty motor Replace motor.

Lennox O23 Specifications

General

Brand	Lennox
Model	O23
Category	Furnace
Language	English