V-Maintenance - Lennox LDT DUAL FUEL Series Unit Information

VI-MAINTENANCE
WARNING
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
electrical power to unit OFF at disconnect
switch(es). Unit may have multiple power
supplies.
CAUTION
As with any mechanical equipment, contact with
sharp sheet metal edges can result in personal
injury. Take care while handling this equipment and
wear gloves and protective clothing.
WARNING
This product contains a chemical known to the State
of California to cause cancer, birth defects, or other
reproductive harm.
A-Lubrication
All motors are lubricated at the factory. No further lubrica-
tion is required.
B-Filters
Units are equipped with four 18 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 FIG-
URE 21.
NOTE-Filters must be U.L.C. certified or equivalent for
use in Canada.
C-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.
ENDPLATE IS
SECURED TO MULLION
INDOOR COIL
BLOWER
TOP VIEW
D-Indoor Coil
Inspect and clean coil at beginning of each cooling and
heating season. Clean using mild detergent or commer-
cial coil cleanser. Flush coil and condensate drain with
water taking care not to get insulation, filters and return
air ducts wet.
E-Outdoor Coil
Clean outdoor coil annually with detergent or commercial
coil cleaner and inspect monthly during the cooling sea-
son. Outdoor coils are made of two formed slabs. Dirt and
debris may become trapped between the slabs. To clean
between slabs, carefully separate coil slabs (no more than
4 inches) and wash them thoroughly. See FIGURE 22.
Flush coils with water following cleaning.
F-Filter Drier
The unit is equipped with a bi-flow filter drier. If replace-
ment is necessary, order another of like design.
CLEAN OUTDOOR COIL
1- Remove screws securing coil end plate to mullion.
2- Remove clips connecting coils slabs and separate
slabs 3-4" (76-102mm).
3- Clean coils with detergent or commercial coil cleaner.
4- Rinse thoroughly with water and reassemble
FIGURE 22
Page 33
REMOVE FILTERS
PULL TO
REMOVE
FILTERS
FIGURE 21
.