20
DIPS
Switch Description
Air Handler DIP
Switches
1
Used to set normal CFM
2
3
Not used
4
5
Used to set aux./emergency heat CFM
6
7
Not used
8
9
Used to set dehumidification CFM
10
Not used
Blower Performance
Blower Performance Variable Speed ECM
Model
Max
ESP
(wg)
Blower
Motor
(hp)
HP CFM Setting
Normal Mode Htg & Clg
Dehumidification Mode Clg
Aux CFM Setting
Aux
Emerg
Mode
S1
S2
Stg 2
Stg 1
Blower
S9
Stg 2
Stg 1
Blower
S5
S6
022
0.50
1/2
On
On
900
700
450
Off
775
600
450
On
On
1000
0.50
1/2
Off
On
800
625
400
Off
680
530
400
Off
On
800
0.50
1/2
On
Off
700
540
375
Off
600
450
375
On
Off
775
0.50
1/2
Off
Off
640
480
350
Off
Off
740
026
0.50
1/2
On
On
1050
800
525
Off
850
700
525
On
On
1150
0.50
1/2
Off
On
925
725
475
Off
760
620
475
Off
On
950
0.50
1/2
On
Off
800
625
425
Off
670
540
425
On
Off
925
0.50
1/2
Off
Off
740
575
400
Off
Off
825
030
0.50
1/2
On
On
1150
950
600
Off
975
775
600
On
On
1250
0.50
1/2
Off
On
980
780
500
Off
825
640
500
Off
On
1000
0.50
1/2
On
Off
900
700
440
Off
750
580
440
On
Off
975
0.50
1/2
Off
Off
800
630
425
Off
Off
900
036
0.50
1/2
On
On
1300
1025
760
Off
1105
871
760
On
On
1300
0.50
1/2
Off
On
1225
950
685
Off
1041
808
685
Off
On
1250
0.50
1/2
On
Off
1150
850
620
Off
940
690
620
On
Off
1225
0.50
1/2
Off
Off
1075
800
550
Off
Off
1200
042
0.75
1
On
On
1500
1100
750
Off
1250
900
750
On
On
1550
0.75
1
Off
On
1425
1010
650
Off
1180
840
650
Off
On
1450
0.75
1
On
Off
1300
975
635
Off
1080
800
635
On
Off
1400
0.75
1
Off
Off
1150
850
625
Off
Off
1275
048
0.75
1
On
On
1700
1300
975
Off
1400
1080
975
On
On
1700
0.75
1
Off
On
1625
1240
875
Off
1350
1025
875
Off
On
1550
0.75
1
On
Off
1450
1100
750
Off
1200
900
750
On
Off
1525
0.75
1
Off
Off
1300
1000
675
Off
Off
1400
060
0.75
1
On
On
1850
1750
1175
Off
1540
1450
1175
On
On
1850
0.75
1
Off
On
1760
1625
1050
Off
1460
1350
1050
Off
On
1760
0.75
1
On
Off
1720
1575
1015
Off
1425
1300
1015
On
Off
1725
0.75
1
Off
Off
1680
1525
975
1428
Off
Off
1700
2/3/10
Factory CFM settings are in boldface
CFM is controlled within 5% up to maximum ESP
Maximum ESP includes allowance for wet coil and standard fi lter
DIP switch 9 must be 'OFF' to select dehumidifi cation mode
ASTON SERIES AIR HANDLER INSTALLATION MANUAL
