Lennox ALLIED Commercial TCA180S2B Standard Manual page 36

WARNING
Product contains fiberglass wool.
Disturbing the insulation in this product during
installation, maintenance, or repair will expose you
to fiberglass wool. Breathing this may cause lung
cancer. (Fiberglass wool is known to the State of Cal-
ifornia to cause cancer.)
Fiberglass wool may also cause respiratory, skin,
and eye irritation.
To reduce exposure to this substance or for further
information, consult material safety data sheets
available from address shown on unit nameplate or
contact your supervisor.
A−Filters
Units are equipped with six 24 X 24 X 2" filters. Filters
should be checked and replaced when necessary with fil-
ters of like kind and size. Take note of air flow direction
marking on filter frame when reinstalling filters. See figure
19.
NOTE−Filters must be U.L.C. certified or equivalent for use
in Canada.
REMOVE FILTERS
FIGURE 19
CONDENSER
ACCESS PANEL
(same on other side)
INDOOR COIL
BLOWER
B−Lubrication
All motors used in TCA units are factory lubricated, no
further lubrication is required.
Blower shaft bearings are prelubricated. For extended
bearing life, relubricate at least once every two years with a
lithium base grease such as Alvania 3 (Shell Oil), Chevron
BRB2 (Standard OIl) or Regal AFB2 (Texas Oil). Use a
hand grease gun for lubrication. Add only enough grease to
purge through the bearings so that a bead of grease ap-
pears at the seal lip contacts.
C−Supply Air Blower Wheel
Annually inspect supply air blower wheel for accumulated
dirt or dust. Turn off power before attempting to remove ac-
cess panel or to clean blower wheel.
D−Evaporator Coil
Inspect and clean coil at beginning of each season. Clean
using mild detergent or commercial coil cleanser. Check
condensate drain pan and line, if necessary. Flush coil and
condensate drain with water taking care not to get insula-
tion, filters and return air ducts wet.
E−Condenser Coil
Clean condenser coil annually with detergent or commer-
cial coil cleaner and inspect monthly during the cooling
season.
Condenser coils are made of two formed slabs. Dirt and de-
bris may become trapped between the slabs. To clean be-
tween slabs, carefully separate coil slabs and wash them
thoroughly. See figure 20. Flush coils with water following
cleaning.
Note − Remove all screws and gaskets prior to cleaning
procedure and replace upon completion.
PULL TO F−Electrical
REMOVE
1− Check all wiring for loose connections.
FILTERS
2− Check for correct voltage at unit (unit operating).
3− Check amp−draw on both condenser fan motor and
CLEAN CONDENSER COIL
1−
2−
TOP VIEW
3−
4−
CONDENSER
5−
COILS
FIGURE 20
Page 36
blower motor.
Fan Motor Rating Plate ____ Actual ________
Indoor Blower Motor Rating Plate____ Actual____
Remove unit top panel and both condenser access
panels.
Remove screws securing coil end plates to mullions.
Remove clips connecting coils slabs and separate
slabs 3−4" (76−102mm).
Clean coils with detergent or commercial coil cleaner.
Rinse thoroughly with water and reassemble
.