PERFORMANCE DATA — 579F (cont)

 

 

 

 

 

 

 

COOLING CAPACITIES (cont)

 

 

 

 

 

 

 

 

 

 

579F240 (20 Tons) (cont)

 

 

 

 

 

 

 

 

 

Temp (F)

 

 

Evaporator Air Quantity — Cfm

 

 

 

 

 

 

 

10,000

 

 

 

 

 

Air Entering

 

 

 

 

 

 

 

 

 

Condenser

 

 

 

Evaporator Air — Ewb (F)/BF

 

 

 

(Edb)

 

 

 

 

 

 

 

 

 

 

54/0.65

58/0.52

 

62/0.40

67/0.26

72/0.24

 

76/0.24

80/0.04

 

 

 

 

 

 

 

TC

250

250

 

256

267

294

 

314

—

 

75

SHC

250

250

 

227

200

161

 

127

—

 

 

kW

15.8

15.8

 

15.9

16.1

16.7

 

17.1

—

 

 

TC

243

244

 

249

262

284

 

303

—

 

85

SHC

243

244

 

220

198

158

 

124

—

 

 

kW

17.6

17.8

 

17.7

18.0

18.5

 

18.9

—

 

 

TC

236

236

 

241

252

274

 

292

—

 

95

SHC

236

236

 

212

194

154

 

121

—

 

 

kW

19.5

19.5

 

19.7

19.9

20.4

 

20.9

—

 

 

TC

228

228

 

234

242

263

 

281

—

 

105

SHC

228

228

 

203

190

151

 

117

—

 

 

kW

21.6

21.6

 

21.8

22.0

22.5

 

22.9

—

 

 

TC

220

220

 

223

232

251

 

268

—

 

115

SHC

220

220

 

207

186

147

 

113

—

 

 

kW

23.9

23.9

 

23.9

24.2

24.7

 

25.2

—

 

 

TC

218

218

 

221

230

249

 

266

—

 

117

SHC

218

218

 

205

185

146

 

112

—

 

 

kW

24.3

24.3

 

24.4

24.7

25.2

 

25.6

—

 

 

TC

215

215

 

218

226

245

 

—

—

 

120

SHC

215

215

 

203

183

145

 

—

—

 

 

kW

25.1

25.1

 

25.1

25.4

25.9

 

—

—

 

 

 

LEGEND

3. The SHC is based on 80 F edb temperature of air entering evaporator coil.

BF

—

Bypass Factor

 

Below 80 F edb, subtract (corr factor x cfm) from SHC.

 

 

Above 80 F edb, add (corr factor x cfm) to SHC.

 

 

Edb

—

Entering Dry-Bulb

 

 

 

 

 

 

 

 

 

 

 

Ewb

—

Entering Wet-Bulb

 

 

 

ENTERING AIR DRY-BULB TEMP (F)

kW

— Compressor Motor Power Input

 

BYPASS

 

ldb

—

Leaving Dry-Bulb

 

79

78

77

76

75

under 75

lwb

—

Leaving Wet-Bulb

 

FACTOR

 

 

 

 

 

 

 

81

82

83

84

85

over 85

 

(BF)

SHC

—

Sensible Heat Capacity (1000 Btuh) Gross

 

 

 

 

 

Correction Factor

 

TC

—

Total Capacity (1000 Btuh) Gross

 

 

 

 

 

NOTES:

 

 

 

 

 

 

0.05

1.04

2.07

3.11

4.14

5.18

 

 

 

 

 

 

 

0.10

0.98

1.96

2.94

3.92

4.91

 

1.

Direct interpolation is permissible. Do not extrapolate.

 

 

2.

The following formulas may be used:

 

0.20

0.87

1.74

2.62

3.49

4.36

 

 

tldb =

tedb –

 

sensible capacity (Btuh)

 

 

0.30

0.76

1.53

2.29

3.05

3.82

Use formula

 

 

1.10 x cfm

 

0.40

0.65

1.31

1.96

2.62

3.27

shown below.

 

 

 

 

 

 

 

 

 

 

 

 

 

0.50

0.55

1.09

1.64

2.18

2.73

 

 

tlwb =

Wet-bulb temperature corresponding to enthalpy of air

 

0.60

0.44

0.87

1.31

1.74

2.18

 

 

leaving evaporator coil (hlwb)

 

0.70

0.33

0.65

0.98

1.31

1.64

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

hlwb =

hewb –

total capacity (Btuh)

 

 

Interpolation is permissible.

 

 

 

 

 

4.5 x cfm

 

 

 

 

 

 

 

 

 

 

Correction Factor = 1.10 x (1 – BF) x (edb – 80).

 

 

 

 

 

 

 

 

 

 

 

 

Where: hewb = Enthalpy of air entering evaporator coil

579F180-300

157

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Image 157
Bryant 581A/B manual 157
Page 156 Page 158

581A/B specifications

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Overall, the Bryant 581A/B is a robust solution for businesses seeking efficient, reliable, and flexible climate control. Its combination of advanced technology, durable construction, and user-friendly features make it a leading choice in the commercial HVAC market.
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