Maintenance - Lennox KGC 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.
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 23.
NOTE - Filters must be U.L.C. certified or equivalent for
use in Canada.
REMOVE FILTERS
FIGURE 23
B-Lubrication
All motors are lubricated at the factory. No further
lubrication is required.
C-Burners (Gas Units)
Periodically examine burner flames for proper appearance
during the heating season. Before each heating season
examine the burners for any deposits or blockage which
may have occurred.
Clean burners as follows:
1 - Turn off both electrical power and gas supply to unit.
2 - Remove burner compartment access panel.
3 - Remove screws securing burners to burner support
and lift the individual burners or the entire burner
assembly from the orifices. See FIGURE 24. Clean
as necessary.
PULL TO
REMOVE
FILTERS
4 - Locate the ignitor under the left burners. Check
ignitor spark gap with appropriately sized twist drills
or feeler gauges. See FIGURE 25 and TABLE 20..
5 - Check the alignment of the ignitor and the sensor
as shown in FIGURE 26.
6 - Replace burners and screws securing burner. Re-
place access panel.
7 - Restore electrical power and gas supply. Follow
lighting instructions attached to unit and use inspec-
tion port in access panel to check flame.
BURNER BOX ASSEMBLY
GAS
VALVE
(GV1), GV3)
BURNERS
SPARK
ELECTRODE
GAS MANIFOLD
SHOULD BE 1/8"
Dimension
A
B
C
Page 39
FLAME
ROLLOUT
LIMIT
(S47), (S69)
FLAME
SENSOR
FIGURE 24
IGNITOR
SPARK GAP
(3mm)
FIGURE 25
TABLE 20
Length - in. (mm)
Unit
Btuh Input
Ignitor
130K 7-3/4 (197)
180K 5 (127)
240K 2-1/4 (57)
Sensor
11 (279)
5-1/2 (140)
2-3/4 (70)