ServicingFilter
Unitsareequippedwiththe numberoffiltersshownin
table1,Filtersshouldbecheckedmonthlyandreplaced
whennecessarywithfiltersoflikekindandsize.Takenote
of air flow directionmarkingon filter frame when
reinstallingfilters,Seefigure8,
REMOVE FILTERS
PULL TO REMOVE
FILTERS
FIGURE 8
NOTE - Filters must be ULC approved or equivalent for
use in Canada.
TABLE 1
NUMBER AND SIZE OF FILTER BY UNIT
LGA/LGC Unit
036, 042, 048,060,072
090,102,120,150
156,180,210,240,300S
248,300H, 360
Qty Filter Size - inches (mm)
2 16 X 25 X 2 (406 X 635 X 51)
4 18 X 24 X 2 (457 X 610 X 51)
6 24 X 24 X 2 (610 X 610 X 51)
12 20X20X2(508X508X51)
Lubrication
All motors are lubricated at the factory, 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 AIvania 3 (Shell Oil),
Chevron BRB2 (Standard Oil) or Regal AFB2 (Texas
Oil). Use a hand grease gun for relubrication, Add only
enough grease to purge through the bearings so that a
bead of grease appears at the seal lip contacts.
Manifold Pressures
Manifold pressures are shown in table 2. Refer to figures
2, 3, 4 and 5 to locate pressure ports.
TABLE 2
MANIFOLD PRESSURES in.wg. (kPa)
Natural Gas Propane (LP) Gas
LGA/LGC Unit 1st Stg.+ 2nd Stg.+ 1st Stg.+ 2nd Stg.+
0.2(+.05) 0.3 (+.08) 0.2 (+.05) 0.3 (+.08)
036, 042, 048, 060, NA 3.5 NA 10.5
072 Std./High Heat (0.87) (2.61 )
036, 042, 048, 060, 1.9 3.5 5.3 10.5
072 Dual Heat (0.47) (0.87) (1.32) (2.61)
1.6 3.7 5.5 10.5
090 through 360
(0.40) (0.92) (1.37) (2.61)
Burners
Clean the burners as follows:
_
2-
3_
Turn off the electrical power and the gas supply to the
unit.
Open or remove the burner compartment access
panel,
Remove two screws securing burners to burner
support and lift the burners from the orifices. See
figure 9. Clean as necessary, Spark gap on ignition
electrode must be properly set, Refer to the Heating
Adjustment section in the installation instructions.
GAS
VALVE
BURNER BOX ASSEMBLY
!
GAS MANIFOLD
FLAME
SENSOR
FIGURE 9
Page 6
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