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MAINTENANCE
WARNING
THESE INSTRUCTIONS ARE
INTENDED AS AN AID TO
QUALIFIED SERVICE PERSONNEL
FOR PROPER INSTALLATION,
ADJUSTMENT AND OPERATION
OF THIS UNIT. READ THESE
INSTRUCTIONS THOROUGHLY
BEFORE ATTEMPTING
INSTALLATION OR OPERATION.
FAILURE TO FOLLOW THESE
INSTRUCTIONS MAY RESULT IN
IMPROPER INSTALLATION,
ADJUSTMENT, SERVICE OR
MAINTENANCE, POSSIBLY
RESULTING IN FIRE, ELECTRICAL
FIGURE 51
FILTER LOCATIONS
I528
TABLE 16
FILTER SIZES
UPFLOW FILTER SIZES
FURNACE
INPUT
BOTTOM
WIDTH
MBTUH
SIZE
17
/
"
45, 60, 75A
15
/
" X 25"
1
2
3
4
21"
75B, 90, 105
19
/
" X 25"
1
4
24
/
"
120
22
/
" X 25"
1
2
3
4
DOWNFLOW/HORIZONTAL FILTER SIZES
FURNACE
INPUT
WIDTH
MBTUH
17
/
"
60, 75A
1
2
21"
75B, 90, 105
24
/
"
120
1
2
SHOCK, CARBON MONOXIDE
POISONING, EXPLOSION,
PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH.
DOWNFLOW
HORIZONTAL
HORIZONTAL
SIDE
QUANTITY
SIZE
15
/
" X 25"
1
3
4
15
/
" X 25"
1
3
4
15
/
" X 25"
1
3
4
SIZE
QUANTITY
12" X 20"
2
12" X 20"
2
14" X 20"
2
AIRFLOW
I413
57
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