Bryant 579F User Manual page 184

579F180 (15 Tons) (cont)
Temp (F)
Air Entering
Condenser
(Edb)
54/0.65
TC 188
75 SHC 188
kW 12.9
TC 183
85 SHC 183
kW 14.4
TC 177
95 SHC 177
kW 15.9
TC 171
105 SHC 171
kW 17.6
TC 164
115 SHC 164
kW 19.4
TC 163
117 SHC 163
kW 19.7
TC 161
120 SHC 161
kW 20.2
LEGEND
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
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
sensible capacity (Btuh)
t = t –
ldb edb
1.10 x cfm
Wet-bulb temperature corresponding to enthalpy of air
t =
lwb leaving evaporator coil (h
total capacity (Btuh)
h = h –
lwb ewb
4.5 x cfm
Where: h = Enthalpy of air entering evaporator coil
ewb
PERFORMANCE DATA — 579F (cont)
COOLING CAPACITIES (cont)
58/0.52 62/0.41
183 193
183 170
12.8 13.0
183 187
183 167
14.4 14.4
177 181
177 161
15.9 16.0
171 175
171 154
17.6 17.7
164 169
164 146
19.4 19.5
163 167
163 145
19.7 19.9
161 165
161 143
20.3 20.4
)
lwb
Evaporator Air Quantity — Cfm
7500
Evaporator Air — Ewb (F)/BF
67/0.30 72/0.28
206
148
13.2 13.6
199
145
14.7 15.1
191
142
16.3 16.7
183
138
18.0 18.4
175
135
19.7 20.2
173
134
20.0 20.5
170
133
20.6
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.
BYPASS
79
FACTOR
81
(BF)
0.05 1.04
0.10 0.98
0.20 0.87
0.30 0.76
0.40 0.65
0.50 0.55
0.60 0.44
0.70 0.33
Interpolation is permissible.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
184
76/0.27
223 239
120 95
13.9
215 233
117 94
15.9
207 222
114 90
17.0
199 213
111 87
18.7
190 203
108 84
20.5
188 201
107 84
20.9
— —
— —
— —
ENTERING AIR DRY-BULB TEMP (F)
78 77 76 75
82 83 84 85
Correction Factor
2.07 3.11 4.14 5.18
1.96 2.94 3.92 4.91
1.74 2.62 3.49 4.36
1.53 2.29 3.05 3.82
1.31 1.96 2.62 3.27
1.09 1.64 2.18 2.73
0.87 1.31 1.74 2.18
0.65 0.98 1.31 1.64
80/0.03
256
70
14.2
249
68
16.3
237
65
17.3
228
62
19.0
217
59
20.9
—
—
—
—
—
—
under 75
over 85
Use formula
shown below.