Emerson 3000 Calculating Subcooling, Example, Temperature Pressure Gauge Psig KPa

Page 84

R407C Refrigerant

Table 34 R407C pressure/temperature chart for subcooling only (liquid measurements)

Temperature

Pressure Gauge

Temperature

Pressure Gauge

Temperature

Pressure Gauge

 

 

 

 

 

 

 

 

 

 

 

 

°F

°C

Psig

kPa

°F

°C

Psig

kPa

°F

°C

Psig

kPa

 

 

 

 

 

 

 

 

 

 

 

 

36.0

2.2

73

500

59.0

15.0

114

786

94.0

34.4

203

1402

 

 

 

 

 

 

 

 

 

 

 

 

37.0

2.8

74

511

60.0

15.6

116

801

96.0

35.6

209

1444

 

 

 

 

 

 

 

 

 

 

 

 

38.0

3.3

76

522

61.0

16.1

118

815

98.0

36.7

216

1488

 

 

 

 

 

 

 

 

 

 

 

 

39.0

3.9

77

533

62.0

16.7

120

830

100.0

37.8

222

1532

 

 

 

 

 

 

 

 

 

 

 

 

40.0

4.4

79

544

63.0

17.2

123

845

102.0

38.9

229

1578

 

 

 

 

 

 

 

 

 

 

 

 

41.0

5.0

81

556

64.0

17.8

125

860

104.0

40.0

236

1624

 

 

 

 

 

 

 

 

 

 

 

 

42.0

5.6

82

567

65.0

18.3

127

875

106.0

41.1

242

1671

 

 

 

 

 

 

 

 

 

 

 

 

43.0

6.1

84

579

66.0

18.9

129

891

108.0

42.2

249

1720

 

 

 

 

 

 

 

 

 

 

 

 

44.0

6.7

86

591

67.0

19.4

131

906

110.0

43.3

257

1769

 

 

 

 

 

 

 

 

 

 

 

 

45.0

7.2

87

602

68.0

20.0

134

922

112.0

44.4

264

1819

 

 

 

 

 

 

 

 

 

 

 

 

46.0

7.8

89

615

69.0

20.6

136

938

114.0

45.6

271

1870

 

 

 

 

 

 

 

 

 

 

 

 

47.0

8.3

91

627

70.0

21.1

138

954

116.0

46.7

279

1922

 

 

 

 

 

 

 

 

 

 

 

 

48.0

8.9

93

639

72.0

22.2

143

987

118.0

47.8

287

1975

 

 

 

 

 

 

 

 

 

 

 

 

49.0

9.4

95

652

74.0

23.3

148

1021

120.0

48.9

294

2029

 

 

 

 

 

 

 

 

 

 

 

 

50.0

10.0

96

664

76.0

24.4

153

1055

122.0

50.0

302

2085

 

 

 

 

 

 

 

 

 

 

 

 

51.0

10.6

98

677

78.0

25.6

158

1090

124.0

51.1

310

2141

 

 

 

 

 

 

 

 

 

 

 

 

52.0

11.1

100

690

80.0

26.7

163

1126

126.0

52.2

319

2198

 

 

 

 

 

 

 

 

 

 

 

 

53.0

11.7

102

704

82.0

27.8

169

1163

128.0

53.3

327

2256

 

 

 

 

 

 

 

 

 

 

 

 

54.0

12.2

104

717

84.0

28.9

174

1201

130.0

54.4

336

2315

 

 

 

 

 

 

 

 

 

 

 

 

55.0

12.8

106

730

86.0

30.0

180

1239

132.0

55.6

345

2376

 

 

 

 

 

 

 

 

 

 

 

 

56.0

13.3

108

744

88.0

31.1

185

1279

134.0

56.7

354

2437

 

 

 

 

 

 

 

 

 

 

 

 

57.0

13.9

110

758

90.0

32.2

191

1319

136.0

57.8

363

2500

 

 

 

 

 

 

 

 

 

 

 

 

58.0

14.4

112

772

92.0

33.3

197

1360

138.0

58.9

372

2563

 

 

 

 

 

 

 

 

 

 

 

 

-

-

-

-

-

-

-

-

140.0

60.0

381

2628

 

 

 

 

 

 

 

 

 

 

 

 

NOTE

Use this table for subcooling calculation ONLY. See Table 33 for superheat or control adjustment.

8.1Calculating Subcooling

Example

Measure the liquid pressure (e.g., 200 psig). Find the liquid saturation temperature at that pressure on Table 34 (e.g., 93°F). Measure the temperature of the liquid line (e.g., 90°F). Subtract the actual temperature from the liquid saturation temperature to obtain the subcooling (e.g., 93 – 90 = 3°F). If the actual temperature is greater than the liquid saturation temperature, then there is no subcooling, and the fluid may be a mixture of liquid and vapor.

Why There Are Two R407C Temperature and Pressure Tables

R407C is a blend of refrigerants that exhibits a temperature “glide” of approximately 8 to 12°F

(4 to 7°C). This “glide” is the difference between the liquid and vapor saturation temperatures at a given pressure. Use the correct table for the saturation temperature you need. Table 33 is for super- heat or operating controls. Table 34 is for subcooling only.

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Contents Liebert Challenger 3000 with iCOM Page Table of Contents Chilled Water Models Split System ModelsR407C Refrigerant Figures Tables Important Safety Instructions Page System Descriptions Split Systems Prop Fan Air-CooledCentrifugal Fan Air-Cooled Water-CooledRoom Preparation Equipment InspectionLocation Considerations Equipment HandlingUnit net weight Handling With SkidRemoval of Skid Model Lb kgUpflow BU cabinet dimensions Floor Cutout Dimensions Piping Considerations Drain LinePiping connection size Piping Outlet Locations Piping connections for air-cooled units Upflow models Installation Applicable to all Models Installation Applicable to all Models Installation Applicable to all Models Installation Applicable to all Models Installation Applicable to all Models Installation Applicable to all Models Facility Fluid and Piping Maintenance Electrical ConnectionsHumidifier Supply Water-Optional Infrared Terminal Block for customer connections Upflow Models with Liebert iCOM Downflow Models with Liebert iCOMPlenum Installation Balancing the Air DistributionUnder-Floor Discharge Systems Ducted ApplicationsChecklist for Completed Installation Condenser Location Line VoltageLow Voltage Air-cooled condenser statistics Refrigerant Piping Recommended line sizes OD copper inchesFan Speed Control Systems Variable Fan Speed Control PipingEquivalent lengths feet for various pipe fittings Indoor unit refrigerant charge lb kgVariable Fan Speed Control Materials Supplied Fan speed suction pressure transducer settings Variable Fan Speed ChargingFactory Piping Field Piping Factory Piping Lee-Temp Leak Check and Evacuation Procedure Liebert Lee-Temp PipingLiebert Lee-Temp Controlled Materials Supplied Lee-Temp suction pressure transducer settings Lee-Temp ChargingLee-Temp Receiver Refrigerant Level 407CFactory Piping Optional Piping Pressure Relief Condenser Factory Piping Field Piping Factory Piping Field Piping Adjustment Water Regulating ValveRefrigerant control settings psi kPa Motorized Ball Valve-Digital Scroll CompressorsManual Flushing ControlStartup LocationManual Control Drycooler Installation Drycooler LocationPump and Drycooler Glycol Piping General GuidelinesRoom dew point temperatures Dry Bulb Wet Bulb Relative Dew Point HumidityVolume in standard Type L copper piping Filling InstructionsExpansion Tanks, Fluid Relief Valves and Other Devices Preparing the System for FillingGlycol Solutions Filling the System Ethylene glycol concentrations@ 50F 10C For expansion tank dimensions, see on 43-3/16 43-9/16 110 5mmSee Note 30-1/4 483mm 1097mmMounting hole dimensional data Drycooler dataGlycol pump data Pump Pump Suction Pump Discharge ConnectionField Piping General arrangement-Glycol-cooled models with digital scroll Field Piping Factorypiping Field Piping Testing Valve Function Glycol Regulating ValveMotor Ball Valve-Digital Scroll Compressors Chilled Water Models WAY Valve Air-Cooled Condensing Units Water/Glycol-Cooled Condensing UnitsRefrigerant Loop Unit refrigerant charge Line charges refrigerant per 100 ft m of Type L copper tubeRecommended refrigerant lines R407C sizes OD copper Quick Connect Fittings Line coupling sizesModel Line Size Coupling Torque Tons OD Cu, Lb-ft Unit Dimensions See Table Outdoor Air-Cooled Condensing UnitsPFCZ42A-L PFCZ41A-L Outdoor air-cooled condensing unit-top air discharge models See TablePiping and electrical connections top air discharge 36-1/4 38-1/2152 Field-supplied unit disconnect switch Ton High Ambient Ton Quiet-LineInstalling the Indoor Condensing Unit Model Net Weight 60 Hz 50 Hz Lb kg MC40A MC39ACentrifugal Air-Cooled Condensing Units Indoor centrifugal condensing unitDucting Airflow CFM CMHPiping Connections Wire connections from evaporator DPN000207Rev0 ModTon centrifugal air-cooled condensing unit dimensional data AIR Cooled Water Cooled Water and Glycol-Cooled Condensing Units Piping ConsiderationsCondenser Water Requirements Regulating ValveGlycol Systems Ton water/glycol-cooled condensing unit24V GND Ton water/glycol-cooled condensing unit dimensional data WATER/GLYCOL Temperature Gauge Pressure Psig KPa R407C RefrigerantTemperature Pressure Gauge Psig KPa Calculating SubcoolingExample R407C Refrigerant R407C Refrigerant Page Ne t Iti Ti nThat Te r Ys t
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