Carrier 50AH - Manual (Page 7)

7
GROSS COOLING CAPACITIES (cont)
LEGEND
NOTES:
1. Performance based on nominal condenser airflow listed in physical data table
on page 3.
2. SHC is based on 80 F db temperature of air entering the coil.
Below 80 F db, subtract (corr factor x cfm) from SHC.
Above 80 F db, add (corr factor x cfm) to SHC.
Correction Factor = 1.10 x (1 – BF) x db – 80)
The following formulas may be used:
Where:
h ewb = Enthalpy of air entering evaporator coil
EVAPORATOR FAN PERFORMANCE
LEGEND
*Standard direct drive indoor (evaporator) fan motor (IFM). For optional
belt drive IFM performance, see table on page 8.
NOTES:
1. Above fan performance is based on wet coil and deducted casing
losses, and clean factory-installed permanent cleanable filter.
2. Evaporator fans are direct drive (except 048, 060 special order
evaporator-fan motor option). Refer to Belt Drive Evaporator Fan
Performance table on page 8.
3. Interpolation is permissible, do not extrapolate.
4. For units installed with accessory electric heaters, see Electric
Heater Static Pressure Drop table for additional performance losses.
50AH048
Temp
Air Ent
Condenser
(F)
Evaporator Air Quantity Cfm/BF
1200/0.06 1600/0.08 2000/0.10
Evaporator Air Ewb Temp (F)
72 67 62 57 72 67 62 57 72 67 62 57
85
TC 56.0 52.1 47.9 44.4 57.7 54.5 50.6 49.6 59.4 56.0 52.7 52.3
SHC 27.8 34.8 41.6 44.4 30.2 39.6 48.0 49.6 32.8 43.9 52.5 52.3
kW
3.77 3.68 3.59 3.53 3.81 3.74 3.66 3.64 3.85 3.77 3.70 3.69
95
TC 54.0 50.1 45.7 42.4 55.7 52.3 48.6 47.3 57.4 53.8 51.0 50.9
SHC 27.1 34.0 40.4 42.4 29.6 38.8 47.0 47.3 32.4 43.2 50.9 50.9
kW
4.21 4.11 4.01 3.95 4.25 4.18 4.09 4.07 4.31 4.21 4.15 4.15
105
TC 51.8 47.9 42.3 40.2 53.6 50.0 45.1 45.0 54.6 51.4 48.9 48.6
SHC 26.3 33.1 38.8 40.2 29.0 38.0 44.8 45.0 31.3 42.4 48.9 48.6
kW
4.69 4.58 4.45 4.40 4.75 4.65 4.54 4.53 4.77 4.69 4.63 4.63
115
TC 49.5 45.5 38.6 37.7 51.2 47.6 41.9 42.1 52.2 49.1 45.8 45.8
SHC 25.5 32.2 37.0 37.7 28.3 27.3 41.8 42.1 30.7 42.0 45.8 45.8
kW
5.21 5.09 4.92 4.89 5.27 5.17 5.03 5.03 5.30 5.23 5.14 5.14
BF — Bypass Factor
Ewb — Entering Wet-Bulb
kW — Compressor Motor Power Input (kilowatts)
SHC — Gross Sensible Heat Capacity (1000 Btuh)
TC — Gross Total Cooling Capacity (1000 Btuh)
BYPASS
FACTOR
(BF)
ENTERING AIR DRY-BULB TEMPERATURE (F)
79 78 77 76 75 Under 75
81 82 83 84 85 Over 85
Correction Factor
.025 1.07 2.12 3.19 4.25 5.32
Use formula
shown below
.05 1.04 2.07 3.11 4.14 5.18
.10 .98 1.96 2.94 3.92 4.90
.20 .87 1.74 2.62 3.49 4.36
.30 .76 1.53 2.29 3.05 3.82
.35 .71 1.42 2.13 2.83 3.54
50AH060
Temp
Air Ent
Condenser
(F)
Evaporator Air Quantity — Cfm/BF
1500/0.06 2000/0.09 2250/0.10
Evaporator Air Ewb Temp (F)
72 67 62 72 67 62 72 67 62
85
TC 64.8 58.5 52.9 68.0 61.5 56.3 68.9 62.5 58.0
SHC 33.2 41.1 48.5 37.2 47.3 55.7 38.9 50.0 57.7
kW 4.49 4.29 4.13 4.59 4.83 4.22 4.62 4.41 4.27
95
TC 61.9 55.7 50.2 65.1 58.7 54.0 66.1 59.7 55.8
SHC 32.3 40.1 47.3 36.4 46.5 54.0 38.2 49.3 55.8
kW 4.94 4.72 4.57 5.04 4.81 4.67 5.07 4.84 4.72
105
TC 58.5 52.4 47.2 61.5 55.2 51.4 62.6 56.3 53.3
SHC 31.1 38.8 45.8 35.2 45.2 51.4 37.1 48.1 58.2
kW 5.41 5.20 5.04 5.51 5.28 5.16 5.55 5.32 5.22
115
TC 54.9 49.0 44.1 57.8 51.7 48.7 58.7 52.6 50.4
SHC 29.8 37.5 44.0 34.0 43.9 48.7 35.9 46.7 50.4
kW 5.93 5.72 5.56 6.04 5.80 5.70 6.07 5.83 5.75
tldb = tedb –
sensible capacity (Btuh)
1.10 x cfm
t lwb = Wet-bulb temperature corresponding to enthalpy of air leaving
evaporator col (h
lwb ).
hlwb = hewb –
total capacity (Btuh)
4.5 x cfm
CFM
UNIT SIZE — 50AH
024 036 048* 060*
ESP Fan kW ESP Fan kW ESP Fan kW ESP Fan kW
600 .60 .20 — — — — — —
700 .54 .22 — — — — — —
800 .43 .24 — — — — — —
900 .29 .26 .69 .44 — — — —
1000 .11 .29 .57 .46 — — — —
1100 — — .42 .49 1.10 .45 1.11 .52
1200 — — .23 .52 1.01 .49 1.045 .55
1300 — — — — .90 .51 .97 .57
1400 — — — — .79 .55 .88 .59
1500 — — — — .67 .58 .78 .62
1600 — — — — .54 .61 .67 .64
1700 — — — — .39 .64 .53 .67
1800 — — — — .22 .67 .52 .70
1900 — — — — .03 .70 .40 .74
2000 — — — — — — .28 .78
ESP — External Static Pressure (in. wg)
kW
— Total Fan Motor Power Input (kilowatts)
Performance data (cont)