Bryant FX4D Product Data page 11

CFM --- Cubic Ft per Minute
SHC --- Gross Sensible Capacity 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.
Leaving wb = wb corresponding to enthalpy of air leaving
coil (h )
lwb
h = h - -total capacity (Btuh)
lwb ewb
4.5 x CFM
where h = enthalpy of air entering coil. Direct interpola-
ewb
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.
MINIMUM CFM AND MOTOR SPEED SELECTION
FAN COIL SIZES
FX
3
019 525
025 700
031 —
037 —
043 —
049 —
061 —
* 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
500 600 700
019 0.034 0.049 0.063
025 0.016 0.027 0.038
031 --- --- --- --- --- ---
037 --- --- --- --- --- ---
043 --- --- --- --- --- ---
049 --- --- --- --- --- ---
061 --- --- --- --- --- ---
PERFORMANCE DATA (cont)
EWB --- Entering Wet Bulb _F (_C)
BF --- Bypass Factor
1.09 x CFM
5 8 9
525 525 —
700 700 —
875 875 —
1050 970 970
— 1225 1225
— 1400 1400
— 1750 1750
800 900 1000 1100
--- --- --- --- --- --- --- ---
0.049 0.059 --- --- --- ---
0.049 0.059 0.070 0.080
--- --- --- --- 0.055 0.064
--- --- --- --- --- --- --- ---
--- --- --- --- --- --- --- ---
--- --- --- --- --- --- --- ---
LWB --- Leaving Wet Bulb _F (_C)
MBH --- 1000 Btuh
SHC CORRECTION FACTOR
ENTERING AIR DRY-- BULB TEMPERATURE (_F)
79 78
81 82
BYPASS
ENTERING AIR DRY-- BULB TEMPERATURE (_C)
FACTOR
26 25
27 28
0.10 .098 1.96
0.20 0.87 1.74
0.30 0.76 1.53
Interpolation is permissible.
Correction Factor = 1.09 x (1 --- BF) x (db --- 80)
HEATER kW
10 15 18
600* — —
700 775* —
875 875 —
970 920 —
1225 1225 1225
1400 1400 1400
1750 1750 1750
CFM
1200 1300 1400 1500
--- --- --- --- --- --- --- ---
--- --- --- --- --- --- --- ---
--- --- --- --- --- --- --- ---
0.073 0.081 --- --- --- ---
0.049 0.056 0.063 0.070
--- --- --- --- 0.038 0.043
--- --- --- --- --- --- --- ---
11
TC --- Gross Cooling Capacity 1000 Btuh
77 76 75 Under 75
83 84 85 Over 85
25 24 24 Under 75
28 29 29 Over 85
Correction Factor
2.94 3.92 4.91
formula
2.62 3.49 4.36
2.29 3.05 3.82
20 24
— —
— —
1060* —
1040 —
1225 —
1400 1400
1750 1750
1600 1700 1800 1900
--- --- --- --- --- --- --- ---
--- --- --- --- --- --- --- ---
--- --- --- --- --- --- --- ---
--- --- --- --- --- --- --- ---
--- --- --- --- --- --- --- ---
0.049 0.054 0.059 --- ---
0.027 0.031 0.035 0.039
Use
shown
below
30
—
—
—
—
—
1400
1750
2000
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
0.043