AAON SA-023, Installation Operation & Maintenance

Page: 53 / 64

53
Filter Replacement
Monthly filter inspection is required to
maintain optimum unit efficiency.
It is strongly recommended that filter media
be replaced monthly. Filters are located
upstream of the evaporator coil. Open access
panel and pull filters straight out to inspect
all of the filters. Replace filters with the size
indicated on each filter or as shown in the
tables below. Arrow on the replacement
filters must point towards the blower.
Table 10 - 23-35 tons, Pre Filters
Feature 6A Quantity/Size Type
0 No Pre Filters
A 9/20” x 20” x 2” Pleated, 30% Eff, MERV 8
Table 11 - 45-70 tons, Pre Filters
Feature 6A Quantity/Size Type
0 No Pre Filters
A 18/20” x 20” x 2” Pleated, 30% Eff, MERV 8
Table 12 - 23-35 tons, Unit Filters
Feature 6B Quantity/Size Type
0
9/20” x 20” x 2”
Pleated, 30% Eff, MERV 8
A
9/20” x 20” x 4”
Pleated, 30% Eff, MERV 8
B
9/20” x 20” x 4”
Pleated, 65% Eff, MERV 11
C
9/20” x 20” x 4”
Pleated, 85% Eff, MERV 13
D
9/20” x 20” x 4”
Pleated, 95% Eff, MERV 14
Table 13 - 45-70 tons, Unit Filters
Feature 6B Quantity/Size Type
0
18/20” x 20” x 2”
Pleated, 30% Eff, MERV 8
A
18/20” x 20” x 4”
Pleated, 30% Eff, MERV 8
B
18/20” x 20” x 4”
Pleated, 65% Eff, MERV 11
C
18/20” x 20” x 4”
Pleated, 85% Eff, MERV 13
D
18/20” x 20” x 4”
Pleated, 95% Eff, MERV 14
Electric shock hazard. Shut off all
electrical power to the unit to avoid
shock hazard or injury from rotating
parts.
WARNING