Carrier FA4C series, Product Data

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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