System Service Checks; Maintenance - Lennox KCC Series Unit Information

TABLE 14
APPROACH TEMPERATURE - Fin/Tube - TXV
Liquid Temp. Minus Ambient Temp.
Unit
1st Stage
092S 7°F + 1 (3.9°C + 0.5)
102S 5°F + 1 (2.8°C + 0.5)
120S 3°F + 1 (1.6°C + 0.5)
150S 1°F + 1 (0.6°C + 0.5)
V- SYSTEMS SERVICE CHECKS
A-Cooling System Service Checks
KCC units are factory charged and require no further
adjustment; however,
periodically using the approach method. The approach
method compares actual liquid temperature with the
outdoor ambient temperature. See section IV- CHARGING.
NOTE - When unit is properly charged, discharge line
pressures should approximate those in TABLE 6 through
TABLE 13.
VI-MAINTENANCE
The unit should be inspected once a year by a qualified
service technician.
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
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.
A-Filters
Units are equipped with six 20 X 25 X 2" filters. Filters
should be checked and replaced when necessary with
filters of like kind and size. Take note of air flow direction
marking on filter frame when reinstalling filters. See
FIGURE 16.
NOTE - Filters must be U.L.C. certified or equivalent for
use in Canada.
2nd Stage
9°F + 1 (5.0°C + 0.5)
15°F + 1 (8.3°C + 0.5)
2.0°F + 1 (1.1°C + 0.5)
3°F + 1 (1.6°C + 0.5)
charge should be checked
REMOVE FILTERS
B-Lubrication
All motors are lubricated at the factory. No further
lubrication is required.
C-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.
D-Condenser Coil
Clean condenser coil annually with water and inspect
monthly during the cooling season.
Clean the coil by spraying the coil steadily and uniformly
from top to bottom. Do not exceed 900 psi or a 45° angle;
nozzle must be at least 12 inches from the coil face.
Take care not to fracture the braze between the fins and
refrigerant tubes. Reduce pressure and work cautiously to
prevent damage.
E-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.
F-Electrical
1 - Check all wiring for loose connections.
2 - Check for correct voltage at unit (unit operating).
3 - Check amp-draw on both condenser fan motor and
blower motor.
Fan Motor Rating Plate ____ Actual ________
Indoor Blower Motor Rating Plate____ Actual____
Page 34
PULL TO
REMOVE
FILTERS
FIGURE 16