10
PERFORMANCE DATA (cont)
NOTES
:
CFM
-- Cubic Ft. per Minute
EWB
-- Entering Wet Bulb (
_
F)
LWB
-- Leaving Wet Bulb (
_
F)
TC
-- Gross Cooling Capacity 1000 Btuh
SHC
-- Gross Sensible Capacity 1000 Btuh
BF
-- Bypass Factor
MBH
-- 1000 Btuh
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 interpolation is
permissible. Do not extrapolate.
3. SHC is based on 80
_
F db temperature of air entering coil. Below
80
_
F db, subtract (Correction Factor x CFM) from SHC. Above 80
_
F
db, add (Correction 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
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
FY, FA
HEATER kW
3
5
8
9
10
15
18
20
24
30
018
525
525
525
—
600*
—
—
—
—
—
024
700
700
700
—
700
775*
—
—
—
—
030
—
875
875
—
875
875
—
1060*
—
—
036
—
1050
970
970
970
920
—
1040
—
—
042
—
—
1225
1225
1225
1225
1225
1225
—
—
048
—
—
1400
1400
1400
1400
1400
1400
1400
1400
060
—
—
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)
FY, FA
SIZE
CFM
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
018
0.034
0.049 0.063
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
024
0.016
0.027 0.038
0.049 0.059
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
030
--- ---
--- ---
--- ---
0.049 0.059 0.070
0.080
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
036
--- ---
--- ---
--- ---
--- ---
--- ---
0.055
0.064 0.073
0.081
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
042
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
0.049
0.056 0.063
0.070
--- ---
--- ---
--- ---
--- ---
--- ---
048
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
0.038
0.043 0.049 0.054
0.059
--- ---
--- ---
060
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
0.027 0.031
0.035 0.039
0.043
FIELD--INSTALLED ACCESSORY FILTER STATIC PRESSURE DROP (in. wc)
UNIT SIZE
FY, FA
CFM
400
600
800
1000
1200
1400
1600
1800
2000
018
0.020
0.044
0.075
---
---
---
---
---
---
024, 030
---
0.022
0.048
0.072
0.100
---
---
---
---
036, 042, 048
---
---
---
0.051
0.070
0.092
0.120
0.152
---
060
---
---
---
---
---
---
0.086
0.105
0.130
ELECTRIC HEATER STATIC PRESSURE DROP (in. wc)
018 --- 036
042 --- 060
HEATER
ELEMENTS
kW
EXTERNAL STATIC
PRESSURE
CORRECTION
HEATER
ELEMENTS
kW
EXTERNAL STATIC
PRESSURE
CORRECTION
0
0
+.02
0
0
+.04
1
3, 5
+.01
2
8, 10
+.02
2
8, 10
0
3
9, 15
0
3
9, 15
–.02
4
20
–.02
4
20
–.04
6
18, 24, 30
–.10
The airflow performance data was developed using fan coils with 10---kW electric heaters (2 elements) in the 018 through 036 size units and 15---kW heaters
(3 elements) in the 042 through 060 size units. For fan coils with heaters of a different number of elements, the external available static at a given CFM from
the curve may be corrected by adding or subtracting available external static pressure as indicated above.
FY4
A
/F
A
4C