
11
PERFORMANCE DATA (cont)
CFM
--- Cubic Ft per Minute
EWB
--- Entering Wet Bulb
_
F (
_
C)
LWB
--- Leaving Wet Bulb
_
F (
_
C)
TC
--- Gross Cooling Capacity 1000 Btuh
SHC
--- Gross Sensible Capacity 1000
Btuh
BF
--- Bypass Factor
MBH
--- 1000 Btuh
NOTES:
1. Contact manufacturer for cooling capacities at conditions
other than shown in table.
2. Formulas:
Leaving db = entering db --sensible heat cap.
1.09 x CFM
Leaving wb = wb corresponding to enthalpy of air leaving
coil (h
lwb
)
h
lwb
= h
ewb
--total capacity (Btuh)
4.5 x CFM
where h
ewb
= enthalpy of air entering coil. Direct interpola-
tion is permissible. Do not extrapolate.
3. SHC is based on 80
_
F (27
_
C) db temperature of air enter-
ing coil. Below 80
_
F (27
_
C) db, subtract (Correction Fact-
or x CFM) from SHC. Above 80
_
F (27
_
C) db, add (Cor-
rection Factor x CFM) to SHC.
4. Bypass Factor = 0 indicates no psychometric solution. Use
bypass factor of next lower EWB for approximation.
SHC CORRECTION FACTOR
BYPASS
FACTOR
ENTERING AIR DRY--BULB TEMPERATURE (
_
F)
79
78
77
76
75
Under 75
81
82
83
84
85
Over 85
ENTERING AIR DRY--BULB TEMPERATURE (
_
C)
26
25
25
24
24
Under 75
27
28
28
29
29
Over 85
Correction Factor
0.10
.098
1.96
2.94
3.92
4.91
Use
formula
shown
below
0.20
0.87
1.74
2.62
3.49
4.36
0.30
0.76
1.53
2.29
3.05
3.82
Interpolation is permissible.
Correction Factor = 1.09 x (1 --- BF) x (db --- 80)
MINIMUM CFM AND MOTOR SPEED SELECTION
FAN COIL SIZES
FX
HEATER kW
3
5
8
9
10
15
18
20
24
30
019
525
525
525
—
600*
—
—
—
—
—
025
700
700
700
—
700
775*
—
—
—
—
031
—
875
875
—
875
875
—
1060*
—
—
037
—
1050
970
970
970
920
—
1040
—
—
043
—
—
1225
1225
1225
1225
1225
1225
—
—
049
—
—
1400
1400
1400
1400
1400
1400
1400
1400
061
—
—
1750
1750
1750
1750
1750
1750
1750
1750
* Indicates medium speed (blue). All other motor speeds at low tap.
AIR DELIVERY PERFORMANCE CORRECTION COMPONENT PRESSURE DROP (in wc)
AT INDICATED AIRFLOW (DRY--TO--WET COIL)
FX
SIZE
CFM
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
019
0.034
0.049 0.063
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
025
0.016
0.027 0.038
0.049 0.059
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
031
--- ---
--- ---
--- ---
0.049 0.059 0.070
0.080
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
037
--- ---
--- ---
--- ---
--- ---
--- ---
0.055
0.064 0.073
0.081
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
043
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
0.049
0.056 0.063
0.070
--- ---
--- ---
--- ---
--- ---
--- ---
049
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
0.038
0.043 0.049 0.054
0.059
--- ---
--- ---
061
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
0.027 0.031
0.035 0.039
0.043
FX4
D