10
FAN CURVE CHARACTERISTICS (CONT.)
NOTES FOR FIGS. 4 - 12:
1. There are 9 ESP (external static pressure) settings for sizes 007 and 009, and 16 ESP settings for sizes 012 through 048.
2. All fan curves show examples of fan characteristics of the MAX. ESP, Rating ESP, and MIN. ESP.
3. All tables show air flows at “H-Speed” for each ESP setting. ESP settings are listed in the first column of each table.
4. Select ESP setting according to the resistance of the connected duct.
5. A controller can be used to change the indoor unit fan speed to H, M, or L.
ESP
FAN
SPEED
RANGE OF AVAILABLE AIRFLOW RATE IN
H-SPEED
Max Point
Mid Point
Min Point
Max
CFM
SP
(in.)
Mid
CFM
SP
(in.)
Min
CFM
SP
(in.)
0.10
H
1509
0.00
1370
0.10
1165
0.20
0.20
H
1576
0.07
1370
0.18
1165
0.28
0.30
H
1576
0.17
1370
0.29
1165
0.36
0.40
H
1576
0.31
1370
0.41
1165
0.47
0.50
H
1576
0.38
1370
0.52
1165
0.58
0.60
H
1576
0.45
1370
0.54
1165
0.62
LEGEND
ESP
—
External Static Pressure
SP
—
Static Pressure
0
0.04
0.08
0.12
0.2
0.16
0.24
0.28
0.32
0.36
0.4
0.44
0.48
0.52
0.56
0.6
0.64
0.68
External Static
Pressure (in.
w
g
)
L-S
pee
d
H-S
pee
d
700 800 900 1000 1100 1200 1300 1400 1500 1600 1700
H-S
peed
L-S
pee
d
Upper Limit of ESP (Max ESP)
Lower Limit of ESP
(Max ESP)
Upper Limit of ESP (Rating ESP)
Upper Limit of ESP
(Min ESP)
Lower Limit of ESP
(Rating ESP)
Lower Limit of ESP
(Min ESP)
M-
Spee
d
1366
Fan Characteristics Curve
AIR FLOW (CFM)
H-S
peed
M-S
peed
M-
Spee
d
L-S
peed
Fig. 12 — Size 048A Fan Curves
