Lennox International Inc. o23v User Manual
Page 20
Page 20
2−Removing Cad Cell
1− Loosen the screw to the back access door until door
2− The cad cell will be located on the right side of the
chassis wall hung on a bracket. See figure 21.
3− Remove by loosening the screw on the bracket.
4− Disconnect the leads from the primary control termi-
nal strip.
FIGURE 21
CAD CELL
ACCESS
DOOR
CAD CELL
SCREW
3−Removing Nozzle Gun Assembly
1− Loosen the screw to the back access door until door
2− Remove flare fitting nut on oil line at pipe adjusting
plate located on outside of blower housing.
3− Remove nut connecting oil line to gun assembly oil
4− Remove gun assembly from air tube.
5− Remove transformer leads.
NOTE−When reinstalling gun assembly, check and
set position and Z" dimension as shown in figure
17.
NOTE−When reconnecting gun assembly oil line, make
sure flat side of nut goes first.
FIGURE 22
GUN ASSEMBLY
Gun
Assembly
Remove
both nuts
4−Removing Oil Pump
1 − Shut off oil.
2 − Disconnect supply line at pump and oil line at gun
assembly. On 2 pipe system remove return line.
3 − Loosen two bolts on sides of pump securing pump
to blower housing. See figure 23.
4 − Detach pump and motor shaft coupler from pump.
FIGURE 23
OIL PUMP
BOLT
BOLT
SUPPLY LINE
INLET
5−Removing Combustion Air Blower
1− Turn off power. Disconnect supply line at pump and
oil line at gun assembly as shown in figure 23.
2− If motor and blower wheel are to be removed away
from the burner, disconnect motor wiring harness
from the primary control. If the motor and blower
wheel only need to be removed to check and clean,
there is adequate wire in the motor wiring harness
without disconnecting.
3− Loosen two bolts securing motor to blower hous-
ing. Key hole slots are provided for easy removal.
See figure 24.
4− Loosen allen set screw holding the blower wheel
onto the motor shaft and remove blower wheel.