Lennox LCH036 Installation Instructions Manual page 45

WARNING
Units are shipped from the factory with temporary
filters. Replace filters before building is occupied.
Damage to unit could result if filters are not re­
placed with approved filters. Refer to appropriate
codes.
Approved filters should be checked monthly and
replaced when necessary. Take note of air flow direction
marking on filter frame when reinstalling filters. See
figure 30.
TABLE 32
UNIT FILTERS
Unit Qty Filter Size - inches (mm)
036, 048
060, 072
NOTE-Filters must be U.L.C. certified or equivalent for
use in Canada.
REMOVE FILTERS
FIGURE 30
B-Lubrication
All motors are lubricated at the factory. No further
lubrication is required.
C-Burners (Gas Units)
Periodically examine
appearance during the heating season. Before each
heating season examine the burners for any deposits or
blockage which may have occurred.
LGH/LCH036, 048, 060, 072
4 16 X 20 X 2 (406 X 508 X 51)
4 20 X 20 X 2 (508 X 508 X 51)
PULL TO
REMOVE
FILTERS
burner flames for proper
Clean burners as follows:
1- Turn off both electrical power and gas supply to unit.
2- Remove blower access panel.
3- Remove top burner box panel.
4- Remove two screws securing burners to burner
support and lift the burners from the orifices. See
figure 31. Clean as necessary.
BURNER BOX ASSEMBLY
FLAME
SENSOR
BURNERS
GAS
MANIFOLD
5- Locate the ignitor under the right burner. Check
ignitor spark gap with appropriately sized twist drills
or feeler gauges. See figure 32.
SPARK GAP
SHOULD BE 1/8"
6- Replace burners and screws securing burner. See
figure 33.
Page 45
GAS VALVE
IGNITOR
FIGURE 31
IGNITOR
(3mm)
FIGURE 32