Lennox LCH036 Installation Instructions Manual page 198

2- Disconnect pressure switch air tubing from combustion
air inducer port.
3- Remove and retain screws securing combustion air
inducer to flue box. Remove and retain the screw
securing the combustion air inducer to the vent
connector. See figure 60.
4- Clean inducer wheel blades with a small brush and wipe
off any dust from housing. Clean accumulated dust
from front of flue box cover.
5- Return combustion air inducer motor to the original
location and secure with retained screws. It is
recommended that the combustion air inducer gasket be
replaced during reassembly.
6- Clean combustion air inlet louvers on heat access
panel using a small brush.
E-Flue Passageway and Flue Box (Gas Units)
1- Remove combustion air inducer assembly as
described in section D.
2- Remove flue box cover. Clean with a wire brush as
3- Reassemble the unit. The flue box cover gasket and
F-Evaporator Coils
Inspect and clean coils at beginning of each cooling season.
Clean using mild detergent or commercial coil cleaner. Flush
coil and condensate drain with water taking care not to get
insulation, filters and return air ducts wet.
G-Condenser Coils
Clean condenser coils annually with detergent or
commercial coil cleaner and inspect monthly during the
cooling season. Access panels are provided on front and
back of condenser section.
H-Supply Air Blower Wheels
Annually inspect supply air blower wheels for accumulated
dirt or dust. Turn off power before attempting to open access
panel or to clean blower wheel.
HEAT EXCHANGER ASSEMBLY
HEAT
EXCHANGER
GAS VALVE
FIGURE 60
Page 54
required.
combustion air inducer gasket should also be replaced
during reassembly.
ROLLOUT
SWITCH
BURNER
COMBUSTION
LGH/LCH420, 480, 540, 600
COLLECTOR
BOX
PROVE
SWITCH
VENT
CONNECTOR
Secures vent
to combustion
air inducer
AIR INDUCER