Lennox LGT156H Installation Instructions Manual page 79

HEAT EXCHANGER ASSEMBLY
HEAT
EXCHANGER
TUBE
COMBUSTION
AIR INDUCER
GAS VALVE
BURNER
FIGURE 43
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
required.
3- Clean tubes with a wire brush.
4- Reassemble the unit. The flue box cover gasket and
combustion air inducer gasket should also be
replaced during reassembly.
F-Evaporator Coil
Inspect and clean coil 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-Supply Air Blower Wheel
Annually inspect supply air blower wheel for accumulated
dirt or dust. Turn off power before attempting to remove
access panel or to clean blower wheel.
H-Condenser Coil
Clean condenser coil annually with detergent or
VENT
commercial coil cleaner and inspect monthly during the
CONNECTOR
cooling season. Access panels are provided on front and
back of condenser section.
J-Needlepoint Bipolar Ionizer
The optional, brush-type ionizer produces positive and
negative ions to clean air and reduce airborne
contaminants. The ionizer was designed to be low
maintenance.
semi-annually to confirm the brushes are clean for
maximum output. The ionizer is located behind the filters.
See figure 44.
1- Remove filters, screws securing the top and bottom
2- Disconnect the ionizer plug near the top of the filter
3- Pull ionizer out of unit and clean brushes.
4- Replace ionizer, reconnect ionizer plug, and replace
Page 79
The device
of the upper filter bracket, and the wire ties the screws
hold in place. See figure 44.
rack.
filters, screws, and wire ties.
should be checked
508288-01 9/2022