Page 21
Servicing the Blower
Blower motor is prelubricated and sealed for extended op
eration. No further lubrication is required. Disconnect pow
er to unit before cleaning blower wheel for debris.
Inspecting the Flue Pipe
The flue pipe should be inspected annually by a qualified
service technician. Remove and clean any soot or ash
found in the flue pipe. Inspect pipe for holes or rusted
areas. If replacement is necessary, replace with the same
size and type as required by code. Inspect the flue draft
control device and replace if found defective.
Cleaning the Heat Exchanger
1. Remove the vent pipe from the furnace.
2. Remove the locking screws and the caps from the
clean out tubes. Remove flue access elbow.
3. Using a long spiral wire brush, sweep down the outer
drum of the heat exchanger. Then using the hose at
tachment, vacuum out loose debris.
4. Remove the locking screw and cap from the observa
tion tube and with the spiral wire brush, reach upward
toward the rear of the heat exchanger to clean out the
crossover tube.
CAUTION
Do not attempt to clean the combustion chamber. It
can be easily damaged.
5. Replace the three clean out caps and flue access el
bow. Make sure locking screws are secure.
6. Brush out and vacuum the vent outlet area of the outer
drum and replace vent pipe.
7. Clean around the burner, blower deck and vestibule
area.
NOTE - A heat exchanger clean‐out kit ABRSH380
(35K09) is available from Lennox. The Kit includes one
radiator brush (which consists of a tapered brush with
a 36” spiral wire handle).
GeniSys
t
Primary Burner Control
SLO185UFV units are equipped with the Beckett Geni
Sys
t
7505B primary burner control. The control is posi
tioned on the upper right-hand side of the Beckett NX burn
er assembly. The control includes a reset button and three
status lights. See figure 22 for location of reset buttons and
status lights. Table 10 details reset button operation. Table
11 details status light function.
Additional information on the GeniSys
t
7505B primary
burner control is provided with this furnace.
Figure 22
Beckett GeniSys
t
7505B Primary Burner Control
Reset Button
with Red Status Light
Yellow Pump Prime
Status Light
Green Flame
Status Light
FRONT VIEW
Wiring
Connections
REAR VIEW
Cad Cell
Connections
