Bryant DURAPAC 551B - Manual (Page 159)

159
PERFORMANCE DATA (cont)
COOLING CAPACITIES (cont)
LEGEND
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
t
lwb
= Wet-bulb temperature corresponding to enthalpy of air leaving evapo-
rator coil (h
lwb
)
Where: h
ewb
= Enthalpy of air entering evaporator coil
3. The SHC is based on 80 F edb temperature of air entering evaporator coil.
Below 80 F edb, subtract (corr factor x cfm) from SHC.
Above 80 F edb, add (corr factor x cfm) to SHC.
Interpolation is permissible.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
551A155 (13 TONS) UNITS WITH PERFECT HUMIDITY™ OPTION
Temp (F)
Air Entering
Condenser
(Edb)
Evaporator Air Quantity — Cfm/BF
3600/0.03 4375/0.04 5000/0.05045 5625/0.06 6250/0.07
Evaporator Air — Ewb (F)
62 67 72 62 67 72 62 67 72 62 67 72 62 67 72
75
TC — 139 153 130 144 153 135 145 155 138 147 159 145 149 156
SHC — 81 63 111 93 68 118 98 68 125 104 72 135 109 72
kW — 8.0 8.2 7.9 8.3 8.2 7.9 8.1 8.3 8.0 8.2 8.3 8.3 8.2 8.3
85
TC — 133 142 125 137 146 129 138 146 132 140 148 135 142 148
SHC — 75 56 105 84 61 113 93 62 120 98 66 125 100 67
kW — 8.9 9.1 8.8 9.2 9.2 8.8 9.0 9.0 8.8 9.0 9.2 9.1 9.1 9.3
95
TC — 126 135 119 129 137 123 132 139 125 133 139 128 135 139
SHC — 70 52 99 78 56 106 84 59 112 90 60 117 95 61
kW — 9.9 10.1 9.7 9.9 10.1 9.9 10.0 10.2 9.9 10.1 10.1 9.9 10.1 10.1
105
TC 105 119 127 110 122 130 113 124 130 115 125 131 118 126 132
SHC 80 65 47 92 73 51 97 78 52 104 83 55 108 89 57
kW 10.6 10.9 11.1 10.8 11.0 11.2 10.9 11.0 11.1 10.8 11.0 11.2 10.9 11.1 11.3
115
TC 90 108 119 97 112 121 97 115 122 100 116 123 106 118 123
SHC 66 57 41 79 66 45 80 72 47 88 76 49 95 80 51
kW 11.7 12.1 12.3 11.8 12.2 12.4 11.8 12.3 12.5 12.0 12.4 12.5 12.1 12.3 12.5
117
TC 86 100 111 98 112 121 99 114 121 102 116 123 107 117 123
SHC 64 52 38 63 58 45 67 61 47 72 63 48 77 66 50
kW 12.8 13.2 13.6 12.0 12.3 12.5 12.0 12.3 12.5 11.9 12.4 12.5 12.1 12.4 12.5
120
TC 90 102 114 90 107 117 91 109 118 93 111 119 99 113 119
SHC 67 52 38 71 61 41 76 66 44 81 70 46 87 75 47
kW 12.3 12.6 12.8 12.3 12.7 12.9 12.3 12.8 12.9 12.3 12.8 13.0 12.5 12.9 13.0
125
TC 83 95 109 85 97 112 87 103 113 88 105 114 90 107 114
SHC 61 47 35 66 53 38 72 61 41 76 66 44 78 70 45
kW 12.8 13.1 13.5 12.8 13.1 13.5 12.9 13.3 13.5 12.8 13.4 13.6 12.9 13.4 13.6
551A180 (15 TONS) UNITS WITH PERFECT HUMIDITY OPTION
Temp (F)
Air Entering
Condenser
(Edb)
Evaporator Air Quantity — Cfm/BF
4500/0.02 5250/0.03 6000/0.03905 6750/0.04 7500/0.05
Evaporator Air — Ewb (F)
62 67 72 62 67 72 62 67 72 62 67 72 62 67 72
75
TC — 185 203 175 191 209 179 195 212 182 198 213 186 200 216
SHC — 105 82 141 115 88 154 125 96 165 135 104 174 145 109
kW — 11.3 11.7 11.0 11.4 11.8 11.1 11.5 11.9 11.2 11.6 11.9 11.3 11.7 12.0
85
TC — 176 193 166 183 199 170 186 202 173 189 204 177 190 205
SHC — 98 74 134 108 81 145 116 85 156 126 93 162 134 97
kW — 12.3 12.7 12.1 12.9 13.4 12.1 12.6 13.5 12.2 12.7 13.5 12.7 12.2 12.7
95
TC — 168 182 156 173 187 160 176 191 163 178 194 167 181 196
SHC — 91 66 126 100 72 137 108 76 146 116 82 153 125 86
kW — 13.7 13.5 13.1 13.6 13.9 13.2 13.6 14.1 13.3 13.4 14.3 13.5 13.9 14.6
105
TC — 156 173 145 160 175 148 162 177 151 166 178 154 167 180
SHC — 83 59 117 90 62 127 98 66 136 106 70 141 112 74
kW — 14.5 15.3 14.2 14.8 15.1 14.4 14.5 15.1 14.4 14.9 14.9 14.2 14.6 14.9
115
TC — 141 156 130 146 160 132 150 162 135 150 164 139 152 166
SHC — 72 47 104 79 52 112 86 55 119 93 59 127 100 63
kW — 15.6 15.9 15.2 15.8 16.2 15.3 16.1 16.3 15.4 16.0 16.4 15.8 16.1 16.4
118
TC — 138 151 126 141 153 129 144 — 134 145 — 135 148 —
SHC — 68 43 100 74 46 108 83 — 120 88 — 124 96 —
kW — 16.1 16.5 15.7 16.1 16.5 15.8 16.3 — 16.0 16.3 — 15.9 16.3 —
120
TC — 134 — 124 — — 126 — — — — — — — —
SHC — 65 — 99 — — 106 — — — — — — — —
kW — 16.2 — 15.9 — — 16.0 — — — — — — — —
125
TC — — — — — — — — — — — — — — —
SHC — — — — — — — — — — — — — — —
kW — — — — — — — — — — — — — — —
BF — Bypass Factor
Edb — Entering Dry-Bulb
Ewb — Entering Wet-Bulb
kW
— Compressor Motor Power Input
ldb — Leaving Dry-Bulb
lwb — Leaving Wet-Bulb
SHC — Sensible Heat Capacity (1000 Btuh) Gross
TC
— Total Capacity (1000 Btuh) Gross
t
ldb
= t
edb
–
sensible capacity (Btuh)
1.10 x cfm
h
lwb
= h
ewb
–
total capacity (Btuh)
4.5 x cfm
BYPASS
FACTOR
(BF)
ENTERING AIR DRY-BULB TEMP (F)
79 78 77 76 75 under 75
81 82 83 84 85 over 85
Correction Factor
.05 1.04 2.07 3.11 4.14 5.18
Use formula
shown below.
.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
0
T
F
Q
0
04
-0
12
55
1A1
55-
18
0