Carrier 09RH User Manual

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Table 23 — Booster “R” Factors

SUCT

 

 

 

DISCHARGE TEMPERATURE (F)

 

 

TEMP

 

–50

–40

–30

–20

 

–10

0

10

20

30

(F)

 

 

 

 

 

 

R-12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

–80

 

1.230

1.276

1.328

1.377

1.429

1.470

–70

 

1.186

1.230

1.280

1.330

1.380

1.421

1.458

1.489

–60

 

1.183

1.233

1.284

1.334

1.375

1.410

1.441

–50

 

1.189

1.238

1.287

1.328

1.363

1.397

–40

 

1.190

1.240

1.280

1.318

1.350

–30

 

 

1.291

1.234

1.270

1.307

 

 

 

 

 

 

R-22

 

 

 

 

 

 

–100

 

1.261

1.310

1.360

1.410

1.453

 

1.221

1.271

1.319

1.371

1.414

 

 

 

–90

 

1.214

1.263

1.313

1.361

1.407

1.448

 

1.175

1.221

1.270

1.321

1.368

1.408

 

 

 

–80

 

1.170

1.218

1.269

1.315

1.360

1.400

1.434

 

1.129

1.172

1.221

1.271

1.319

1.359

1.394

 

 

 

–70

 

1.172

1.221

1.269

1.313

1.351

1.388

1.424

 

1.125

1.173

1.221

1.270

1.311

1.348

1.382

 

 

 

–60

 

1.178

1.220

1.267

1.303

1.340

1.377

1.406

 

1.125

1.172

1.221

1.263

1.300

1.337

1.367

 

 

 

–50

 

1.175

1.219

1.256

1.291

1.329

1.360

 

1.123

1.173

1.217

1.252

1.289

1.319

 

 

 

–40

 

1.171

1.209

1.245

1.281

1.311

 

1.126

1.169

1.205

1.241

1.261

 

 

 

–30

 

 

1.160

1.199

1.233

1.265

 

 

1.121

1.159

1.196

1.227

 

 

 

 

 

 

Air-cooled(R-12andR-22)

 

 

Water-cooled(R-22only)

 

 

 

 

 

 

 

 

 

 

[0.212 x low stage bhp]

 

 

NOTE: For R-502,“R” Factor = 1 +low stage capacity (tons)

 

50

 

 

 

 

 

 

 

 

 

40

 

 

 

 

 

 

 

 

 

30

 

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

 

 

15

 

 

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

OF REFRIGERATION

9

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

7

 

 

 

 

 

 

 

 

6

 

 

 

 

 

 

 

 

5

 

 

 

SATURATED

 

 

 

4

 

 

 

 

 

 

3

 

 

 

 

SUCTION

 

 

TONS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TEMPERATURE

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F

 

 

 

 

 

 

 

 

 

-

 

 

 

 

 

 

 

 

 

100

 

 

1

 

 

 

 

 

-

 

 

 

 

 

 

 

 

90

 

 

 

 

 

 

 

 

-

 

 

 

 

 

 

 

 

 

80

 

 

 

 

 

 

 

 

-

 

 

 

 

 

 

 

 

 

60

 

 

 

 

 

 

 

 

-

 

 

 

 

 

 

 

 

 

40

 

 

 

 

 

0.5

10

15

20

30

40

50

60

70

 

5

 

 

 

 

 

SAFETY FACTOR %

 

 

Fig. 19 — Booster Compressor Selection

Safety Factors

Determining Intermediate Pressure — In application of commercial compressors to staged systems, the lowest total bhp per ton and most economical equipment selection results when using approximately equal compression ratios for each stage. It is also economical to juggle assigned compression ratios to fit available sizes of machines.

 

100

 

 

 

 

 

 

 

MULTIPLYING FACTORS

 

 

 

 

FOR OTHER SPEEDS

 

 

 

90

 

 

 

 

 

RPM

80

 

 

 

 

 

AT 1750

 

 

 

 

 

70

CAPACITY

 

 

 

% RATING

 

 

 

 

60

 

BHP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

50

 

 

 

 

 

 

 

1000

1200

1400

1600

1800

SPEED (RPM)

Fig. 20 — Multiplying Factors —

Nonstandard Speeds

The use of Fig. 21 (page 32), will allow direct determination of proper intermediate pressure that will result in equal compression ratios per stage for a direct 2-stagesystem. Information in Fig. 21 is given in terms of saturated temperature instead of pressures, for easier use with compressor ratings.

Existence of a second appreciable load, at some higher suction pressure level, will often dictate the most convenient intermediate pressure.

Gas Desuperheating — Operation of a direct staged system requires cooling of the gas between stages; otherwise, highly superheated discharge gas fromlow-stagemachine would be taken directly into the suction of higher stage compressor and further compression would result in excessive heating of this compressor.

Liquid Cooling — It is also necessary to employ liquid cooling between stages and increase refrigeration effect of liquid delivered to evaporator to realize rated capacity of booster compressor. Amount of refrigeration expended in cooling liquid between stages is accomplished more economically at the level ofhigh-stagecompressor suction than at the level oflow-stagesuction.

Three common methods of gas desuperheating and liquid cooling for direct stage systems are illustrated in Fig. 18. In open-typesystems, refrigerant liquid is cooled down to the saturation temperature corresponding to intermediate pressure. Inclosed-typesystems, good intercooler design usually results in refrigerant liquid being cooled down to 10 to 20 degrees above saturation temperature corresponding to intermediate pressure.

Oil Separators and Lubrication — In cascade-type systems, where evaporators and suction lines are properly designed for oil return to the compressor, oil separators are usually not used.

In direct stage systems, however, oil may tend to accumulate in one of the stages and thus result in lack of lubrication in other machine. By use of oil transfer lines, equalization of oil level between crankcases can be achieved by manual operation at periodic intervals. Automatic control of proper oil return to both compressors is effected by use of a high stage discharge line oil separator, returning oil to high stage machine, and a high side float, connected to high stage machine crankcase, which continually drains excess oil from this crankcase down to the next lower stage compressor (Fig. 18).

For booster application, factory oil charge should be drained and replaced with a suitable viscosity oil for low temperature application.

31

Control Pressurestat for Booster Application — The standard dual pressure switch furnished with the 5F,H compressor cannot be used for booster application. Replace it with an appropriate low temperature dual pressurestat that can operate at values shown in Table 24. Any commercial pressure switch is acceptable; for example, an Allen-Bradley Bulletin 836, type L33 for R-12 or type 1 for R-22.

Table 24 — Control Pressurestats for

Low Stage Application

CHARACTERISTICS

 

R-12

R-22,R-502,OR

 

 

R-507/404A

 

 

 

 

 

Switch Action — High

Open on pressure rise

Open on pressure rise

 

— Low

Open on pressure fall

Open on pressure fall

Range

— High

20″

Vac to 65 psig

30″

Vac to 110 psig

 

— Low

30″

Vac to 20 psig

30″

Vac to 25 psig

Differential

— High

8 to 30 psi adjust.

12 to 30 psi adjust.

 

— Low

5 to 15 psi adjust.

9 to 30 psi adjust.

Max Pressure — High

200 psig

300 psig

 

— Low

120 psig

300 psig

F

+50

 

 

 

 

 

 

 

 

 

 

 

 

TEMPERATURE

 

R-12

 

 

 

 

 

 

 

 

120

 

 

+40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F

110

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TEMPERATURE

 

 

 

+30

 

 

 

 

 

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

90

 

 

 

INTERMEDIATE

 

 

 

 

DISCHARGE

 

 

 

 

+20

 

 

 

 

80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+10

 

 

SATURATED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SATURATED

0

 

 

 

 

 

 

 

 

 

 

 

 

-10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-20

 

 

 

 

 

 

 

 

 

 

 

 

 

-100

-90

-80

-70

-60

-50

-40

-30

 

 

-20

-10

0

 

 

 

SATURATED SUCTION TEMPERATURE F

 

 

 

 

 

 

+50

 

 

 

 

 

 

 

 

 

 

 

 

F

+40

 

 

 

 

 

 

 

 

 

 

 

 

TEMPERATURE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

110

 

 

+30

 

 

 

 

 

 

F

 

100

 

 

R-22

 

 

 

TEMPERATURE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

90

 

 

 

 

 

 

 

 

 

 

 

 

+20

R-502(SEE NOTE)

 

80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INTERMEDIATE

+10

 

 

 

DISCHARGE

 

 

 

 

 

 

 

 

 

SATURATED

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SATURATED

-10

 

 

 

 

 

 

 

 

 

 

 

 

-20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-30

 

 

 

 

 

 

 

 

 

 

 

 

 

-40

 

 

 

 

 

 

 

 

 

 

 

 

 

-100

-90

-80

-70

-60

-50

-40

-30

 

 

-20

-10

0

 

 

 

SATURATED SUCTION TEMPERATURE F

 

 

 

 

 

NOTE: For R-502,lower saturated intermediate temperature is approximately 5 F.

Fig. 21 — Optimum Intermediate Temperature for 2-StageCompression (Incorporating Equal Compression Ratios per Stage)

32

Discharge Valve Springs — When 5H compressors are used for booster applications where discharge pressure is below 10 psig, the standard discharge valve springs furnished with the machine should be replaced with an equal number of lighter weight springs, Part Number 5H41-1801.

No change in discharge valve springs is recommended for 5F compressors.

Water-Cooled Heads — Standard 5F,H compressors are not equipped withwater-cooledheads but they are available on special order. Water cooling of heads is generally not necessary inR-12orR-502booster applications. For applications withR-22involving high compression ratios, 5 or above, 5F,H booster compressors should be equipped with watercooled heads.

Motor Selection Data — In staged refrigeration systems, the high stage compressor starts first and runs until low stage pressure has been reduced to a predetermined level before the low stage machine starts. With direct staged arrangements, the high stage machine draws gas from the evaporator through low stage machine bypass during this initial period. Size of the selected motor must be related to the maximum condition at which booster compressor can operate.

Compressor may run under heavy loads during periods of high suction pressure, especially on starting when system is warm. To handle these situations the motor must be sized larger than the actual balanced operation brake horsepower indicates, or special attention must be paid to operation of the system when starting initially. Tables 25-27give balanced brake horsepower values at 1750 rpm.

If the system is to operate only at a fixed low temperature, it is possible to avoid oversizing of motors providing careful operation is followed when the system is first put in operation.

On applications requiring reduction from ambient conditions to some extremely low temperature, the compression system will be operated at high suction pressures for considerable periods of time. General practice is to drive the high stage compressor with a motor that will operate compressor at the highest expected evaporator temperature. This is generally the “air conditioning” rating of unit. For intermediate or low stage compressors, it is generally sufficient to size motor to take care of double the balance load indicated horsepower plus friction horsepower.

Also consider compressor starting torque requirements when selecting motor for a booster compressor. Starting torque of a motor only large enough to provide required normal operating bhp for booster applications may not be large enough to start the compressor. Recommended minimum motor sizes shown in Table 28 have been selected to assure adequate starting torque. Actual motor size selected is usually larger, depending on the maximum bhp conditions under which the compressor will run during pulldown or other abnormal operating periods.

It is good practice to select motors with allowance for 10% voltage reduction unless there is a certainty that this cannot occur.

Compressor Starting Torque — Required compressor starting torque is dependent on the discharge pressure as well as the pressure differential occuring during start-up. Maximum expected torque required during the starting period for 5F,H compressors, used as boosters, is shown in Table 28 at 2 saturated discharge temperatures.

Selection Procedure — Selection of a 5F,H booster compressor requires that the load, saturated suction temperature, saturated discharge temperature, type of system and refrigerant are known.

After the saturated intermediate temperature is determined from Fig. 21, the booster rating (Tables 25-27)can be entered and the compressor selected. Low stage load is then multiplied by the “R” factor from Table 23 to obtain high stage compressor load. With this information, the Compressor Ratings tables on pages7-15,and page 17 can be entered and thehigh-stagecompressor selected.

SELECTED EXAMPLE: Given:

Refrigeration Load. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.7 tons Saturated Suction Temperature. . . . . . . . . . . . . . . . . . . . . –60F Saturated Condensing Temperature . . . . . . . . . . . . . . . . . . .80 FOpen-TypeIntercooler

Refrigerant 22

Find: Compressor size and motor size.

Solution:

1.Figure 21 indicates an optimum saturated intermediate temperature of –2F. Allow a 1 degree or 2 degree drop from the booster compressor to intercooler and from the intercooler to the high stage compressor.

Booster Saturated Suction Temperature = –60F Booster Saturated Discharge Temperature = 0° F

2.At –60F suction and 0° F discharge, the 5H60 booster compressor has a capacity of 6.8 tons with 12.1 bhp input at 1750 rpm.

The safety factor at 1750 rpm:

( 6.85.7 ) x 100 – 100 = 19.3 or 20%

This is satisfactory from Fig. 19 and a 5H60 compressor is selected.

3.Indicated hp (ihp) = bhp – Friction hp (fhp)

Where bhp is given in Table 26 and fhp is given in Table 28.

Indicated hp (ihp) = 12.1 – 3.07 = 9.03 Recommended minimum hp

=(2 x ihp) + fhp

=(2 x 9.03) + 3.07 = 21.13

Tentatively select a 25-hpmotor. Assume that low stage will never start against a saturated discharge higher than 30 F. At 30 F discharge, Table 28 indicates a starting torque of 54lb-ft.Therefore, a normal starting torque25-hpmotor is selected.

4.With –60F suction and 0° F discharge, Table 23 indicates an “R” value of 1.303. Therefore, the high stage load is:

1.303 x 6.8 = 8.86 tons (actual load)

5.Allowing a 1 degree drop from the intercooler, the high stage saturation suction temperature is –3F.

Allowing a 2 degree drop between the compressor and condenser, the high stage saturated discharge temperature = 80 + 2 = 82 F.

6.Referring to the 5F,H Compressor Ratings table, 5F60 at 1450 rpm (using multiplier in compressor capacity notes) has a capacity of 9.21 tons at –3F suction and 82 F discharge (through interpolation). The 5F60 is selected and requires 13.0 bhp at 1450 rpm.

7.Assume that maximum load during pulldown occurs at 50 F suction and 90 F discharge. For this condition, the rating tables (using the multiplier in Step 6) indicate 15.8 bhp, thus a 20-hpmotor is selected.

33

Table 25 — 5F,H Booster Ratings; R-12

SST

SDT*

5F20

5F30

5F40

5F60

Cap.

Bhp

Cap.

Bhp

Cap.

Bhp

Cap.

Bhp

 

 

 

–50

0.28

0.93

0.42

1.30

0.57

1.67

0.85

2.42

 

–40

0.27

0.94

0.40

1.31

0.54

1.68

0.80

2.43

–85

–30

0.25

0.94

0.38

1.31

0.50

1.69

0.76

2.45

–20

0.24

0.95

0.36

1.33

0.47

1.70

0.71

2.46

 

 

–10

0.20

0.95

0.31

1.34

0.40

1.71

0.63

2.49

 

0

0.18

0.95

0.27

1.35

0.36

1.73

0.55

2.51

 

–50

0.34

0.97

0.51

1.36

0.63

1.75

1.00

2.54

 

–40

0.33

1.00

0.49

1.40

0.65

1.80

0.98

2.61

–80

–30

0.31

1.00

0.47

1.40

0.62

1.80

0.93

2.62

–20

0.30

1.00

0.45

1.41

0.59

1.81

0.89

2.63

 

–10

0.27

1.00

0.40

1.42

0.54

1.82

0.80

2.64

 

0

0.24

1.01

0.36

1.42

0.48

1.76

0.72

2.66

 

10

0.21

1.01

0.31

1.43

0.42

1.84

0.63

2.67

 

–40

0.48

1.11

0.72

1.57

0.95

2.03

1.40

2.96

 

–30

0.46

1.13

0.70

1.60

0.93

2.07

1.40

3.02

 

–20

0.45

1.14

0.68

1.62

0.90

2.09

1.40

3.05

–70

–10

0.42

1.14

0.63

1.63

0.84

2.10

1.30

3.07

0

0.39

1.15

0.58

1.63

0.77

2.11

1.20

3.08

 

 

10

0.35

1.15

0.53

1.64

0.70

2.12

1.10

3.09

 

20

0.31

1.16

0.46

1.65

0.60

2.13

0.93

3.11

 

30

0.27

1.17

0.40

1.66

0.53

2.15

0.80

3.14

 

–30

0.66

1.27

0.98

1.81

1.30

2.35

2.00

3.44

 

–20

0.64

1.31

0.96

1.87

1.30

2.43

1.90

3.56

–60

–10

0.61

1.32

0.92

1.89

1.20

2.45

1.80

3.59

0

0.58

1.33

0.86

1.90

1.20

2.47

1.70

3.62

 

10

0.54

1.39

0.82

1.99

1.10

2.59

1.60

3.80

 

20

0.50

1.45

0.75

2.08

1.00

2.71

1.50

3.98

 

30

0.45

1.35

0.68

1.94

0.90

2.52

1.40

3.69

 

–20

0.89

1.51

1.30

2.17

1.80

2.83

2.70

4.16

 

–10

0.86

1.53

1.30

2.20

1.70

2.87

2.60

4.22

–50

0

0.83

1.56

1.20

2.25

1.70

2.93

2.50

4.31

10

0.79

1.58

1.20

2.28

1.60

2.97

2.40

4.37

 

 

20

0.74

1.60

1.10

2.30

1.50

3.01

2.20

4.43

 

30

0.69

1.61

1.00

2.32

1.40

3.03

2.10

4.46

 

–10

1.20

1.77

1.80

2.56

2.40

3.35

3.50

4.94

–40

0

1.10

1.83

1.70

2.65

2.30

3.47

3.40

5.12

10

1.10

1.90

1.70

2.76

2.20

3.61

3.30

5.33

 

20

1.10

1.90

1.60

2.78

2.10

3.64

3.20

5.38

 

30

1.00

1.93

1.50

2.80

2.00

3.67

3.00

5.42

 

0

1.50

2.17

2.30

3.16

3.10

4.15

4.60

6.14

–30

10

1.50

2.23

2.30

3.25

3.00

4.27

4.50

6.32

20

1.40

2.29

2.20

3.34

2.90

4.39

4.40

6.50

 

 

30

1.40

2.34

2.10

3.41

2.80

4.49

4.20

6.65

SST

SDT*

5H40

5H46

5H60

5H66

Cap.

Bhp

Cap.

Bhp

Cap.

Bhp

Cap.

Bhp

 

 

 

–50

1.30

3.43

1.60

4.46

2.00

5.52

2.50

7.17

 

–40

1.20

3.46

1.50

4.50

1.90

5.58

2.40

7.25

–85

–30

1.20

3.50

1.50

4.54

1.80

5.63

2.20

7.31

–20

1.10

3.53

1.30

4.59

1.70

5.68

2.10

7.38

 

 

–10

1.00

3.58

1.20

4.65

1.50

5.75

1.90

7.47

 

0

0.88

3.63

1.10

4.72

1.30

5.82

1.60

7.56

 

–50

1.60

3.64

2.00

4.73

2.40

5.85

3.00

7.60

 

–40

1.50

3.70

1.80

4.81

2.30

5.93

2.90

7.70

–80

–30

1.50

3.75

1.80

4.87

2.20

6.01

2.70

7.81

–20

1.40

3.81

1.70

4.95

2.10

6.09

2.60

7.91

 

–10

1.30

3.85

1.60

5.00

1.90

6.15

2.40

7.99

 

0

1.20

3.88

1.50

5.04

1.70

6.20

2.10

8.06

 

10

1.00

3.96

1.20

5.15

1.50

6.31

1.90

8.20

 

–40

2.20

4.27

2.70

5.55

3.40

6.79

4.20

8.82

 

–30

2.20

4.36

2.70

5.66

3.30

6.92

4.10

8.98

 

–20

2.10

4.45

2.60

5.78

3.20

7.05

4.00

9.15

–70

–10

2.00

4.49

2.40

5.84

3.00

7.11

3.70

9.23

0

1.90

4.52

2.30

5.87

2.80

7.12

3.50

9.25

 

 

10

1.70

4.58

2.10

5.95

2.60

7.25

3.20

9.42

 

20

1.50

4.65

1.80

6.04

2.30

7.34

2.80

9.53

 

30

1.30

4.71

1.60

6.12

2.00

7.44

2.50

9.66

 

–30

3.10

5.12

3.80

6.65

4.70

8.06

5.80

10.48

 

–20

3.00

5.25

3.70

6.82

4.60

8.25

5.70

10.63

–60

–10

2.90

5.31

3.60

6.90

4.40

8.35

5.50

10.85

0

2.80

5.38

3.50

6.99

4.20

8.44

5.20

10.98

 

10

2.60

5.43

3.20

7.06

3.90

8.52

4.80

11.08

 

20

2.40

5.49

3.00

7.14

3.60

8.60

4.50

11.19

 

30

2.20

5.54

2.70

7.20

3.20

8.69

4.00

11.30

 

–20

4.20

6.15

5.20

7.99

6.30

9.60

7.80

12.48

 

–10

4.00

6.30

4.90

8.19

6.10

9.83

7.60

12.78

–50

0

3.90

6.45

4.80

8.38

5.90

10.06

7.30

13.08

10

3.70

6.52

4.60

8.47

5.60

10.24

6.90

13.31

 

 

20

3.50

6.62

4.30

8.60

5.20

10.31

6.40

13.40

 

30

3.30

6.67

4.10

8.80

4.90

10.38

6.10

13.49

 

–10

5.50

7.43

6.80

8.83

8.30

11.53

10.30

15.00

–40

0

5.40

7.74

6.70

10.05

8.10

11.98

10.00

15.59

10

5.20

7.95

6.40

10.32

7.80

12.30

9.70

15.99

 

20

5.00

8.04

6.20

10.45

7.40

12.44

9.20

16.19

 

30

4.70

8.13

5.80

10.58

7.10

12.57

8.80

16.32

 

0

7.30

9.41

9.00

12.22

11.00

14.50

13.60

18.86

–30

10

7.10

9.65

8.80

12.53

10.60

14.84

13.10

19.30

20

6.80

9.88

8.40

12.83

10.20

15.19

12.70

19.72

 

 

30

6.50

10.11

8.00

13.13

9.80

15.54

12.20

20.20

SST

SDT*

5H80

5H86

5H120

5H126

Cap.

Bhp

Cap.

Bhp

Cap.

Bhp

Cap.

Bhp

 

 

 

–50

2.60

7.37

3.20

9.58

4.00

9.50

5.00

12.35

 

–40

2.50

7.44

3.20

9.66

3.80

9.70

4.70

12.60

–85

–30

2.40

7.51

3.00

9.76

3.60

9.80

4.50

12.73

–20

2.20

7.58

2.70

9.85

3.40

9.90

4.20

12.88

 

 

–10

2.00

7.67

2.50

9.96

3.00

10.00

3.70

13.00

 

0

1.80

7.76

2.20

10.99

2.70

10.10

3.30

13.93

 

–50

3.20

7.69

4.00

10.00

4.80

10.20

5.90

13.28

 

–40

3.10

7.90

3.80

10.28

4.60

10.20

5.70

13.28

–80

–30

2.90

8.01

3.60

10.41

4.40

10.50

5.40

13.66

–20

2.80

8.12

3.50

10.54

4.20

10.70

5.20

13.91

 

–10

2.60

8.19

3.10

10.64

3.90

10.80

4.80

14.03

 

0

2.30

8.27

2.80

10.74

3.50

10.90

4.30

14.18

 

10

2.00

8.42

2.50

10.94

3.00

11.10

3.70

14.42

 

–40

4.50

9.05

5.60

11.77

6.70

12.10

8.30

15.72

 

–30

4.30

9.22

5.30

11.98

6.50

11.30

8.10

14.70

 

–20

4.20

9.40

5.20

12.21

6.30

12.60

7.80

16.39

–70

–10

4.00

9.47

5.00

12.31

5.90

12.70

7.30

16.50

0

3.70

9.55

4.60

12.41

5.60

12.70

7.90

16.50

 

 

10

3.40

9.66

4.20

12.56

4.30

13.00

5.30

16.90

 

20

3.00

9.79

3.70

12.71

4.50

13.20

5.60

17.18

 

30

2.60

9.92

3.20

12.89

3.90

13.40

4.80

17.42

 

–30

6.20

10.74

7.70

13.98

9.30

14.60

11.50

18.99

 

–20

6.10

11.00

7.60

14.30

9.10

15.00

11.30

14.50

–60

–10

5.80

11.13

7.20

14.48

8.70

15.20

10.80

19.77

0

5.60

11.26

6.90

14.62

8.30

15.40

10.30

20.02

 

10

5.20

11.36

6.40

14.77

7.80

15.50

9.70

20.15

 

20

4.80

11.47

5.90

14.90

7.20

15.70

8.90

20.40

 

30

4.30

11.58

5.30

15.06

6.50

15.90

8.10

20.70

 

–20

8.30

12.80

10.30

16.63

12.50

17.70

15.50

23.00

 

–10

8.10

13.10

10.10

17.02

12.10

18.20

15.10

23.65

–50

0

7.80

13.41

9.70

17.42

11.70

18.60

14.50

24.19

10

7.40

13.65

9.20

17.73

11.20

19.00

13.90

24.70

 

 

20

7.00

13.74

8.70

17.87

10.50

19.10

13.00

24.80

 

30

6.50

13.84

8.10

18.00

9.80

19.30

12.10

25.10

 

–10

11.10

15.37

13.80

19.98

16.60

21.60

20.60

28.07

–40

0

10.80

15.98

13.40

20.77

16.20

22.50

20.10

29.21

10

10.40

16.41

12.90

21.36

15.60

23.10

19.30

25.10

 

20

9.90

16.58

12.30

21.55

14.80

23.40

18.30

30.40

 

30

10.70

16.76

13.30

21.79

14.10

23.60

17.50

30.70

 

0

14.60

19.33

18.10

25.16

21.90

27.50

27.10

35.74

–30

10

14.10

19.79

17.50

25.71

21.20

28.20

26.20

34.05

20

13.60

20.26

16.90

26.25

20.50

28.90

25.40

37.55

 

 

30

13.00

20.72

16.10

26.94

19.60

29.60

24.30

38.43

LEGEND

Bhp — Brake Horsepower

Cap. — Capacity (Tons)

SDT — Saturated Discharge Temperature (F)

SST — Saturated Suction Temperature (F)

*Also referred to as Saturated Intermediate Temperature.

34

Table 26 — 5F,H Booster Ratings; R-22

SST

SDT*

5F20

 

5F30

 

5F40

 

5F60

Cap.

 

Bhp

Cap.

 

Bhp

Cap.

 

Bhp

Cap.

Bhp

 

 

 

 

 

 

–50

0.27

 

0.95

0.40

 

1.35

0.54

 

1.75

0.80

2.25

–100

–40

0.22†

 

1.00

0.33†

 

1.36

0.43†

 

1.75

0.65†

2.45

–30

0.18†

 

1.05

0.28†

 

1.38

0.37†

 

1.80

0.55†

2.50

 

–20

0.15†

 

1.10

0.23†

 

1.38

0.30†

 

1.80

0.45†

2.60

 

–10

0.10†

 

1.15

0.15†

 

1.40

0.20†

 

1.85

0.30†

2.70

 

–50

0.42

 

1.05

0.62

 

1.53

0.83

 

1.95

1.40

2.65

 

–40

0.38

 

1.11

0.56

 

1.55

0.75

 

1.95

1.10

2.75

–90

–30

0.35†

 

1.14

0.53†

 

1.58

0.70†

 

2.00

1.10†

2.80

–20

0.29†

 

1.19

0.44†

 

1.59

0.58†

 

2.00

0.88†

2.81

 

 

 

 

 

–10

0.27†

 

1.24

0.40†

 

1.61

0.54†

 

2.05

0.80†

2.90

 

0

0.24†

 

1.23

0.36†

 

1.62

0.48†

 

2.10

0.73†

3.00

 

–50

0.63

 

1.25

0.94

 

1.80

1.30

 

2.20

1.90

3.20

 

–40

0.57

 

1.25

0.85

 

1.81

1.10

 

2.20

1.70

3.25

–80

–30

0.54

 

1.28

0.81

 

1.82

1.10

 

2.25

1.60

3.30

–20

0.50

 

1.30

0.75

 

1.85

1.10

 

2.25

1.50

3.35

 

–10

0.46†

 

1.33

0.69†

 

1.86

0.92†

 

2.30

1.40†

3.40

 

0

0.43†

 

1.36

0.65†

 

1.90

0.87†

 

2.30

1.30†

3.50

 

10

0.36†

 

1.39

0.53†

 

1.91

0.71†

 

2.40

1.10†

3.50

 

–40

0.83

 

1.45

1.20

 

2.11

1.70

 

2.70

2.50

3.94

 

–30

0.79

 

1.48

1.20

 

2.15

1.60

 

2.72

2.40

4.00

–70

–20

0.75

 

1.50

1.10

 

2.18

1.50

 

2.72

2.20

4.05

–10

0.71

 

1.53

1.10

 

2.19

1.40

 

2.80

2.10

4.10

 

0

0.67†

 

1.59

1.00†

 

2.20

1.30†

 

2.85

2.00†

4.17

 

10

0.59†

 

1.50

0.89†

 

2.21

1.20†

 

3.00

1.80†

4.20

 

20

0.51†

 

1.55

0.75†

 

2.22

1.00†

 

3.00

1.60†

4.42

 

–30

1.10

 

1.75

1.70

 

2.45

2.40†

 

3.30

3.40

4.78

 

–20

1.10

 

1.79

1.60

 

2.48

2.10

 

3.30

3.20

4.80

–60

–10

1.00

 

1.82

1.60

 

2.60

2.10

 

3.40

3.10

5.00

0

0.99

 

1.88

1.50

 

2.62

2.00

 

3.50

3.00

5.08

 

10

0.91†

 

1.81

1.40†

 

2.65

1.80†

 

3.60

2.70†

5.25

 

20

0.82†

 

1.82

1.20†

 

2.68

1.60†

 

3.57

2.50†

5.29

 

30

0.73†

 

1.84

1.10†

 

2.70

1.50†

 

3.50

2.20†

5.40

 

–20

1.50

 

2.12

2.30

 

3.05

3.00

 

4.00

4.60

5.50

 

–10

1.40

 

2.16

2.20

 

3.10

2.90

 

4.10

4.30

6.00

–50

0

1.40

 

2.10

2.20

 

3.15

2.90

 

4.15

4.30

6.19

10

1.30

 

2.23

2.00

 

3.25

2.60

 

4.25

4.00

6.28

 

 

 

 

 

20

1.20

 

2.22

1.90

 

3.30

2.50

 

4.30

3.70

6.40

 

30

1.20†

 

2.28

1.70†

 

3.31

2.30†

 

4.20

3.50†

6.50

 

–10

1.90

 

2.60

2.90

 

3.50

3.90

 

4.88

5.80

7.50

–40

0

1.90

 

2.50

2.80

 

3.88

3.80

 

5.08

5.60

7.68

10

1.80

 

2.78

2.70

 

4.17

3.60

 

5.40

5.40

7.96

 

20

1.70

 

2.82

2.60

 

4.08

3.50

 

5.40

5.20

8.09

 

30

1.70

 

2.85

2.50

 

4.17

3.30

 

5.50

5.00

8.19

 

0

2.40

 

2.85

3.60

 

5.19

4.80

 

7.40

7.30

9.78

–30

10

2.30

 

3.60

3.50

 

5.34

4.60

 

7.58

7.00

10.00

20

2.30

 

3.62

3.40

 

5.44

4.50

 

7.00

6.80

10.10

 

 

 

 

 

30

2.20

 

3.70

3.30

 

5.47

4.40

 

7.87

6.60

10.20

SST

SDT*

5H40

5H46

5H60

5H66

Cap.

Bhp

Cap.

Bhp

Cap.

Bhp

Cap.

Bhp

 

 

 

–50

1.30

3.10

1.60

4.03

1.90

5.50

2.40

7.15

–100

–40

1.10†

3.50

1.30†

4.55

1.60†

5.58

2.00†

7.25

–30

0.92†

3.50

1.10†

4.55

1.40†

5.78

1.70†

7.50

 

–20

0.79†

3.68

0.97†

4.78

1.20†

6.00

1.50†

7.80

 

–10

0.67†

3.75

0.83†

4.87

1.00†

6.08

1.20†

7.90

 

–50

1.90

3.70

2.30

4.80

2.90†

6.18

3.60

8.03

 

–40

1.70

3.98

2.10

5.17

2.60

6.40

3.20

8.31

–90

–30

1.60†

4.04

2.00†

5.25

2.40†

6.58

3.00†

8.55

–20

1.04†

4.09

1.70†

5.31

2.10†

6.58

2.60†

8.55

 

 

–10

1.30†

4.14

1.60†

5.38

2.00†

6.65

2.50†

8.64

 

0

1.20†

4.19

1.50†

5.44

1.80†

6.75

2.20†

8.77

 

–50

2.80

4.49

3.50

5.84

4.30

7.30

5.30

9.48

 

–40

2.60

4.79

3.20

6.22

3.90

7.50

4.80

9.74

–80

–30

2.40

4.89

3.00

6.35

3.60

7.68

4.50

9.97

–20

2.30

4.94

2.80

6.41

3.40

7.78

4.20

10.10

 

–10

2.20†

5.00

2.70†

6.50

3.30†

7.88

4.10†

10.20

 

0

1.90†

5.12

2.30†

6.65

2.90†

7.99

3.60†

10.40

 

10

1.70†

5.25

2.10†

6.82

2.50†

8.00

3.10†

10.40

 

–40

3.80

5.90

4.70†

7.66

5.80

9.18

7.20

11.90

 

–30

3.60

5.98

4.40

7.77

5.40

9.28

6.70

12.10

–70

–20

3.30

5.97

4.10

7.75

5.00

9.28

6.20

12.10

–10

3.30

6.08

4.10

7.90

4.90

9.50

6.10

12.40

 

0

3.10†

6.19

3.80

8.04

4.60†

9.75

5.70†

12.70

 

10

2.70†

6.25

3.30†

8.42

4.10†

10.00

5.10†

13.00

 

20

2.40†

6.25

2.90†

8.12

3.60†

10.10

4.50†

13.10

 

–30

5.20

7.08

6.40†

9.19

7.80

11.30

9.70

14.70

 

–20

4.90

7.28

6.10

9.45

7.40

11.60

9.20

15.10

–60

–10

4.80

7.34

5.90

9.53

7.20

11.80

8.90

15.40

0

4.50

7.70

5.60

10.00

6.80

12.10

8.40

15.70

 

10

4.10†

7.75

5.10†

10.05

6.20†

12.30

7.70†

16.00

 

20

3.80†

7.75

4.70†

10.05

5.60†

12.30

6.90†

16.00

 

30

3.50†

7.87

4.30†

10.20

5.20†

12.50

6.40†

16.30

 

–20

6.90

8.88

8.50

11.50

10.30

14.00

12.80

18.20

 

–10

6.80

9.00

8.40

11.70

10.20

14.50

12.60

18.90

–50

0

6.40

9.25

7.90

12.00

9.60

14.60

11.90

19.00

10

6.00

9.50

7.40

12.30

9.30

14.70

11.50

19.10

 

 

20

5.60

9.66

6.90

12.60

8.50

15.00

10.50

19.50

 

30

5.30†

9.75

6.60†

12.70

7.90†

15.10

9.80†

19.60

 

–10

9.00

10.30

11.20

13.40

13.60

17.20

16.90

22.40

–40

0

8.70

11.60

10.50

15.10

13.00

17.70

16.10

23.00

10

8.20

12.00

10.20

15.60

12.30

18.20

15.30

23.60

 

20

7.90

12.30

9.80

16.00

11.90

18.60

14.80

24.20

 

30

7.70

12.40

9.50

16.10

11.50

18.90

14.30

24.20

 

0

11.50

15.10

14.30

19.60

17.20

22.50

21.20

29.20

–30

10

11.10

15.50

13.70

20.10

16.70

23.20

20.70

30.10

20

10.90

15.80

13.50

20.50

16.30

24.00

20.00

31.20

 

 

30

10.60

16.10

13.10

20.90

15.90

24.60

19.70

32.00

SST

SDT*

5H80

5H86

5H120

5H126

Cap.

Bhp

Cap.

Bhp

Cap.

Bhp

Cap.

Bhp

 

 

 

–50

2.50

7.00

3.10

9.10

3.80

9.50

4.70

12.40

–100

–40

2.20†

7.25

2.70†

9.40

3.30†

9.60

4.10†

12.50

–30

1.80†

7.50

2.20†

9.70

2.80†

10.10

3.50†

13.10

 

–20

1.60†

7.75

2.00†

10.10

2.40†

10.50

3.00†

13.70

 

–10

1.30†

8.12

1.60†

10.00

2.00†

10.60

2.50†

13.80

 

–50

3.80

8.00

4.70

10.40

5.80

10.90

7.20

14.20

 

–40

3.40

8.25

4.20

10.70

5.10

11.30

6.30

14.70

–90

–30

3.20†

8.50

4.00†

11.00

4.80†

11.60

5.90†

15.10

–20

2.80†

8.87

3.50†

11.50

4.30†

11.60

5.30†

15.10

 

 

–10

2.70†

9.00

3.30†

11.70

4.00†

11.80

5.00†

15.40

 

0

2.30†

9.00

2.80†

11.70

3.50†

12.00

4.30†

15.60

 

–50

5.70†

9.50

7.10

12.40

8.50†

13.10

10.50

17.10

 

–40

5.20

10.00

6.40

13.00

7.80

13.50

9.70

17.50

–80

–30

4.80

10.30

5.90

13.40

7.30

13.90

9.00

18.10

–20

4.50

10.50

5.60

13.70

6.80

14.10

8.40

18.30

 

–10

4.30†

10.60

5.30†

13.80

6.50†

14.30

8.10†

18.60

 

0

3.80†

10.60

4.70†

13.80

5.80†

14.50

7.20†

18.90

 

10

3.30†

10.80

4.10†

14.00

5.00†

14.50

6.20†

18.90

 

–40

7.70

12.10

9.50

15.70

11.50

16.90

14.30

22.00

 

–30

7.20

12.50

8.90

16.20

10.80

17.10

13.40

22.00

–70

–20

6.70

12.70

8.30

16.50

10.00

17.10

12.40

22.20

–10

6.50

12.70

8.00

16.50

9.80

17.50

12.20

22.80

 

0

6.20†

13.00

7.70†

16.90

9.30†

18.00

11.50

23.40

 

10

5.40†

12.60

6.70†

16.40

8.10†

18.50

10.00†

24.00

 

20

4.80†

13.30

5.90†

17.30

7.30†

18.70

9.00†

24.30

 

–30

10.40

15.00

12.90

19.50

15.40

21.00

19.10

27.30

 

–20

9.90†

15.20

12.30

19.80

14.80

21.80

18.30

28.40

–60

–10

9.60

15.50

11.90

20.20

14.40

22.00

17.90

28.60

0

9.00

15.80

11.20

20.60

12.60

22.80

15.60

29.60

 

10

8.20†

16.00

10.20†

20.80

12.30†

23.00

15.30†

29.90

 

20

7.50†

16.40

9.30†

21.30

11.30†

23.00

14.00†

29.90

 

30

6.90†

16.50

8.50†

21.40

10.40†

23.50

12.90†

30.60

 

–20

13.70

18.70

17.00

24.30

20.60

26.50

25.50

34.40

 

–10

13.50

19.00

16.70

24.70

20.30†

27.50

25.20

35.70

–50

0

12.90

19.20

16.00

25.00

19.30

27.70

23.90

36.00

10

12.00

19.50

14.90

25.40

18.10

28.00

22.40

36.40

 

 

20

11.30

20.00

14.00

26.00

16.90

28.50

20.90

37.00

 

30

10.50†

20.20

13.00†

26.20

15.80†

28.80

19.60†

37.40

 

–10

18.00

23.00

22.30

29.80

27.10

33.00

33.50

42.90

–40

0

17.40

23.70

21.60

30.80

26.00

34.00

32.20

44.20

10

16.40

24.20

20.40

31.40

24.50

35.00

30.40

45.40

 

20

15.90

25.00

19.70

32.50

23.80

38.20

29.50

49.70

 

30

15.40

25.20

14.10

32.80

23.00

36.20

28.50

47.00

 

0

22.90

29.00

28.40

37.70

34.40

43.50

42.60

56.50

–30

10

22.20

30.00

27.50

39.00

33.30

45.00

41.30

58.50

20

21.70

31.00

26.90

40.30

35.60

46.50

44.10

60.40

 

 

30

21.20

31.20

26.20

40.50

31.80

47.70

39.40

62.00

LEGEND

Bhp — Brake Horsepower

Cap. — Capacity (Tons)

SDT — Saturated Discharge Temperature (F)

SST — Saturated Suction Temperature (F)

*Also referred to as Saturated Intermediate Temperature.

†Requires water-cooledheads.

35

Table 27 — 5F,H Booster Ratings; R-502

SST

SDT*

5F20

5F30

5F40

5F60

 

Cap.

Bhp

Cap.

Bhp

Cap.

Bhp

Cap.

 

Bhp

 

 

 

 

–30

0.6

1.0

0.9

1.6

1.1

1.7

1.7

 

3.2

 

–20

0.5

1.0

0.7

1.7

1.0

1.8

1.5

 

3.3

–90

–10

0.4

1.1

0.6

1.7

0.9

1.9

1.3

 

3.3

0

0.3

1.0

0.5

1.7

0.7

1.9

1.1

 

3.3

 

10

0.3

1.0

0.4

1.5

0.6

1.8

0.9

 

3.1

 

20

0.2

0.9

0.3

1.5

0.5

1.7

0.7

 

2.9

 

30

0.1

0.8

0.3

1.5

0.5

 

2.6

 

–30

0.9

1.1

1.3

1.8

1.7

1.9

2.6

 

3.5

 

–20

0.8

1.2

1.2

2.0

1.5

2.1

2.3

 

3.8

–80

–10

0.7

1.3

1.0

2.1

1.4

2.3

2.0

 

4.0

0

0.6

1.3

0.9

2.1

1.2

2.4

1.8

 

4.1

 

10

0.5

1.3

0.8

2.1

1.0

2.4

1.5

 

4.1

 

20

0.4

1.3

0.6

2.0

0.9

2.4

1.3

 

4.0

 

30

0.3

1.2

0.5

1.9

0.7

2.3

1.0

 

3.8

 

–30

1.2

1.2

1.9

2.0

2.5

2.1

3.7

 

3.8

 

–20

1.1

1.4

1.7

2.2

2.3

2.4

3.4

 

3.2

–70

–10

1.0

1.5

1.5

2.3

2.1

2.7

3.1

 

4.6

0

0.9

1.6

1.4

2.5

1.8

2.9

2.8

 

4.8

 

10

0.8

1.6

1.2

2.6

1.6

3.0

2.4

 

5.0

 

20

0.7

1.7

1.1

2.6

1.4

3.1

2.1

 

5.1

 

30

0.6

1.6

0.9

2.6

1.2

3.1

1.8

 

5.0

 

–30

1.7

1.2

2.6

2.0

3.5

2.2

5.2

 

3.8

 

–20

1.6

1.4

2.4

2.3

3.2

2.6

4.8

 

4.4

–60

–10

1.5

1.6

2.2

2.6

3.0

3.0

4.4

 

5.0

0

1.3

1.8

2.0

2.8

2.7

3.3

4.0

 

5.5

 

10

1.2

1.9

1.8

3.0

2.4

3.6

3.6

 

5.9

 

20

1.1

2.0

1.6

3.1

2.1

3.8

3.2

 

6.2

 

30

0.9

2.1

1.4

3.2

1.9

4.0

2.8

 

6.3

 

–20

2.2

1.4

3.3

2.3

4.4

2.6

6.7

 

4.4

 

–10

2.1

1.7

3.1

2.7

4.1

3.1

6.2

 

5.2

–50

0

1.9

2.0

2.8

3.1

3.8

3.6

5.7

 

6.0

10

1.7

2.2

2.6

3.4

3.4

4.1

5.2

 

6.6

 

 

 

20

1.5

2.4

2.3

3.6

3.1

4.4

4.7

 

7.1

 

30

1.4

2.5

2.1

3.8

2.8

4.7

4.2

 

7.5

 

–20

3.0

1.3

4.5

2.2

6.0

2.5

9.0

 

4.0

 

–10

2.8

1.7

4.2

2.7

5.6

3.2

8.4

 

5.1

–40

0

2.6

2.0

3.9

3.2

5.2

3.8

7.7

 

6.2

10

2.4

2.3

3.6

3.6

4.7

4.4

7.1

 

7.1

 

 

 

20

2.2

2.6

3.3

4.0

4.3

4.9

6.5

 

7.9

 

30

2.0

2.8

3.0

4.3

3.9

5.4

5.9

 

8.6

 

–10

3.7

1.6

5.5

2.5

7.4

3.0

11.1

 

4.6

–30

0

3.4

2.0

5.2

3.1

6.9

3.8

10.3

 

6.0

10

3.2

2.4

4.8

3.7

6.4

4.6

9.6

 

7.2

 

20

2.9

2.8

4.4

4.3

5.9

5.3

8.8

 

8.4

 

30

2.7

3.1

4.1

4.8

5.4

6.0

8.1

 

9.4

SST

SDT*

5H40

5H46

5H60

5H66

Cap.

Bhp

Cap.

Bhp

Cap.

Bhp

Cap.

Bhp

 

 

 

–30

2.7

6.3

3.4

8.2

4.1

8.7

5.1

11.3

 

–20

2.4

6.4

3.0

8.3

3.6

8.9

4.5

11.5

–90

–10

2.1

6.4

2.6

8.4

3.1

9.0

3.9

11.6

0

1.8

6.4

2.2

8.3

2.7

8.9

3.3

11.5

 

10

1.4

6.2

1.8

8.1

2.2

8.6

2.7

11.2

 

20

1.1

5.9

1.4

7.7

1.7

8.2

2.2

10.7

 

30

 

–30

4.1

6.9

5.1

8.9

6.1

9.6

7.6

12.4

 

–20

3.7

7.2

4.6

9.4

5.6

10.1

6.9

13.1

–80

–10

3.3

7.4

4.1

9.6

5.0

10.4

6.2

13.5

0

2.9

7.5

3.6

9.8

4.4

10.6

5.4

13.8

 

10

2.5

7.5

3.1

9.8

3.8

10.6

4.7

13.8

 

20

2.1

7.4

2.6

9.6

3.2

10.4

4.0

13.5

 

30

1.7

7.1

2.1

9.3

2.6

10.0

3.2

13.0

 

–30

5.9

7.3

7.3

9.5

8.8

10.3

11.0

13.3

 

–20

5.4

7.9

6.7

10.3

8.1

11.1

10.1

14.4

–70

–10

4.9

8.3

6.1

10.8

7.4

11.8

9.2

15.3

0

4.4

8.7

5.5

11.3

6.6

12.3

8.2

16.0

 

10

3.9

8.9

4.9

11.5

5.9

12.6

7.3

16.4

 

20

3.4

8.9

4.2

11.6

5.2

12.8

6.4

16.6

 

30

2.9

8.8

3.6

11.5

4.4

12.7

5.5

16.5

 

–30

8.3

7.5

10.2

9.8

12.3

10.6

15.3

13.7

 

–20

7.7

8.4

9.4

10.9

11.4

11.9

14.2

15.4

–60

–10

7.0

9.1

8.7

11.8

10.5

13.0

13.1

16.8

0

6.4

9.7

7.9

12.6

9.6

13.9

11.9

18.0

 

10

5.8

10.2

7.2

13.2

8.7

14.6

10.8

19.0

 

20

5.2

10.5

6.4

13.7

7.8

15.1

9.7

19.6

 

30

4.6

10.7

5.7

13.9

6.9

15.4

8.6

20.0

 

–20

10.5

8.3

12.9

11.1

15.6

12.1

19.4

15.7

 

–10

9.8

9.6

12.0

12.5

14.5

13.7

18.0

17.8

–50

0

9.0

10.6

11.1

13.7

13.4

15.2

16.7

19.7

10

8.2

11.4

10.1

14.8

12.3

16.4

15.3

21.3

 

 

20

7.5

12.0

9.2

15.6

11.2

17.4

13.9

22.6

 

30

6.7

12.5

8.3

16.2

10.1

18.1

12.5

23.5

 

–20

14.1

8.2

17.3

10.7

20.9

11.7

26.0

15.2

 

–10

13.2

9.7

16.2

12.7

19.6

13.9

24.3

18.1

–40

0

12.2

11.1

15.1

14.4

18.2

16.0

22.6

20.7

10

11.3

12.3

13.9

16.0

16.9

17.8

20.9

23.1

 

 

20

10.4

13.3

12.8

17.3

15.5

19.3

19.2

25.1

 

30

9.4

14.1

11.7

18.4

14.1

20.6

17.5

26.8

 

–10

17.4

9.3

21.3

12.1

25.8

13.3

32.1

17.3

–30

0

16.3

11.1

20.0

14.5

24.2

16.0

30.0

20.8

10

15.1

12.8

18.6

16.6

22.5

18.5

28.0

24.1

 

20

14.0

14.2

17.2

18.5

20.9

20.7

25.9

27.0

 

30

12.9

15.5

15.9

20.2

19.2

22.7

23.9

29.5

SST

SDT*

5H80

5H86

5H120

5H126

Cap.

Bhp

Cap.

Bhp

Cap.

Bhp

Cap.

Bhp

 

 

 

–30

5.4

11.6

6.8

15.1

8.2

17.0

10.1

21.8

 

–20

4.8

11.9

6.0

15.4

7.2

17.4

9.0

22.4

–90

–10

4.2

12.0

5.2

15.5

6.3

17.5

7.8

22.6

0

3.6

11.8

4.4

15.4

5.3

17.3

6.6

22.3

 

10

2.9

11.5

3.7

15.0

4.4

16.8

5.4

21.7

 

20

2.3

11.0

2.9

14.3

3.5

16.0

4.3

20.6

 

30

 

–30

8.2

12.8

10.2

16.6

12.3

18.8

15.2

24.2

 

–20

7.4

13.5

9.2

17.5

11.1

19.8

13.8

25.5

–80

–10

6.6

13.9

8.2

18.1

9.9

20.5

12.3

26.4

0

5.8

14.1

7.2

18.4

8.7

20.8

10.8

26.8

 

10

5.0

14.1

6.3

18.4

7.5

20.8

9.4

26.8

 

20

4.3

13.9

5.3

18.1

6.4

20.4

7.9

26.3

 

30

3.5

13.4

4.4

17.4

5.2

19.6

6.5

25.4

 

–30

11.8

13.7

14.6

17.8

17.7

20.1

21.9

25.9

 

–20

10.8

14.8

13.4

19.3

16.2

21.9

20.1

28.2

–70

–10

9.8

15.7

12.2

20.4

14.8

23.2

18.3

29.9

0

8.9

16.4

11.0

21.3

13.3

24.2

16.5

31.3

 

10

7.9

16.8

9.8

21.9

11.8

24.8

14.7

32.1

 

20

6.9

17.0

8.6

22.1

10.3

25.1

12.8

32.4

 

30

6.0

16.9

7.4

21.9

8.9

24.9

11.1

32.2

 

–30

16.4

14.1

 

–20

15.2

15.8

18.9

20.5

22.9

23.2

28.4

30.1

–60

–10

14.0

17.3

17.4

22.5

21.1

25.5

26.1

32.9

0

12.8

18.5

15.9

24.0

19.2

27.4

23.9

35.3

 

10

11.6

19.4

14.4

25.3

17.4

28.8

21.6

37.2

 

20

10.4

20.1

12.9

26.1

15.6

29.8

19.4

38.5

 

30

9.2

20.5

11.4

26.6

13.8

30.3

17.1

39.2

 

–20

20.9

16.2

25.9

21.0

31.3

23.8

38.9

30.7

 

–10

19.4

18.3

24.1

23.8

29.1

27.1

36.1

35.0

–50

0

17.9

20.2

22.2

26.3

26.9

29.9

33.3

38.6

10

16.4

21.8

20.4

28.3

24.6

32.3

30.6

41.8

 

 

20

14.9

23.1

18.5

30.0

22.4

34.2

27.8

44.3

 

30

13.4

24.0

16.7

31.3

20.2

35.7

25.0

46.2

 

–20

27.9

15.6

34.6

20.2

41.9

22.9

52.0

29.6

 

–10

26.1

18.6

32.4

24.1

39.2

27.4

48.6

35.5

–40

0

24.3

21.3

30.2

27.6

36.5

31.5

45.3

40.7

10

22.5

23.6

27.9

30.7

33.8

35.1

41.9

45.3

 

 

20

20.7

25.7

25.6

33.4

31.0

38.1

38.5

49.3

 

30

18.8

27.4

23.4

35.6

28.3

40.7

35.1

52.7

 

–10

34.5

17.7

42.7

23.1

51.7

26.1

64.2

33.9

–30

0

32.3

21.4

40.0

27.8

48.4

31.6

60.1

40.9

10

30.0

24.7

37.3

32.1

45.1

36.6

56.0

47.4

 

20

27.8

27.6

34.5

35.9

41.8

41.0

51.8

53.1

 

30

25.6

30.2

31.8

39.2

38.5

44.9

47.7

58.1

LEGEND

Bhp — Brake Horsepower

Cap. — Capacity (Tons)

SDT — Saturated Discharge Temperature (F)

SST — Saturated Suction Temperature (F)

*Also referred to as Saturated Intermediate Temperature.

36

Table 28 — Booster Compressor Starting Data

 

UNLOADING

MAX COMPR STARTING TORQUE (lb-ft)

RECOMMENDED MIN MOTOR SIZE HP

FRICTION

COMPR

R-12

 

R-22orR-502

 

R-12

R-22orR-502

DURING

 

 

HP*

SIZE

STARTING

Saturated Discharge Temperature (F)

High

 

Normal

High

Normal

(fhp)

 

 

 

10 F

 

30 F

10 F

30 F

Torque

 

Torque

Torque

Torque

 

5F20

None

9

 

13

15

21

 

2

3

3

.67

5F30

None

10

 

15

16

24

3

 

3

5

5

.91

5F40

75%

8

 

12

13

19

3

 

3

5

5

1.15

5F60

662/

%

10

 

15

16

24

3

 

5

5

71/

1.64

 

3

 

 

 

 

 

 

 

 

 

 

2

 

5H40

75%

19

 

28

30

45

5

 

71/

71/

10

2.25

5H46

75%

24

 

35

38

56

71/

 

2

2

15

2.25

 

 

10

10

5H60

662/

%

23

 

34

37

54

2

 

10

10

15

3.07

 

71/

 

 

3

 

 

 

 

 

 

2

 

 

 

 

 

5H66

662/3%

29

 

43

46

68

10

 

15

15

20

3.07

5H80

75%

26

 

38

41

60

10

 

15

20

20

3.82

5H86

75%

33

 

48

51

75

15

 

20

20

30

3.82

5H120

662/3%

41

 

60

65

94

15

 

20

20

30

5.25

5H126

662/3%

51

 

75

81

118

20

 

30

30

40

5.25

*Based on 1750 rpm with 5F,H compressors. Will vary directly with rpm at other speeds.

CONDENSERS

Condenser Physical Data — Refer to Table 29. Refer to 5F,H Product Data for information on the current P701 water-cooled condensers used with the 5F,H watercooled condensing units.

Condenser Selection Considerations — On most installations the condenser is selected within recommended conditions specified in ARI Standards. Main considerations are:

1.The water velocity is within a range of 1 to 12 ft per second (to minimize corrosion and erosion).

2.It is good practice to select condensers on a leaving temperature difference between 6 and 12 degrees. In general, higher temperature differences are used only where condensing water temperature is quite low or where special conditions make it economical to do so. A high temperature difference not only makes effect of fouling more pronounced but since the condenser volume is likely to be small, the effect on noncondensable gases will be greater.

Table 30 lists maximum water velocities from Carrier System Design Manual. Limits are above ARI recommended values but are generally accepted where ARI conformance is not specified. See Part 5 of the Carrier System Design Manual for further details.

Table 31 lists condenser water quantities (gpm) for water velocities from 3 to 12 fps. For higher velocities, use formulas below Table 31.

Condenser Duty — The capacity of a given compressor is greatest at high saturated suction temperatures. Because of this, the compressor normally requires the largest condenser at these conditions or for air conditioning duty.

On refrigeration or low temperature applications, the same compressor displacement results in a lower refrigeration capacity and, consequently, less heat rejection. Thus, condenser size is smaller than would normally be required with the same compressor on air conditioning duty.

Condenser size is also affected by refrigerant used, since compressor capacities (and thus heat rejection) differ with Refrigerants 12, 22, and 502.

Pulldown — Condensers for systems subject to pulldown periods, especially low temperature or multistage systems, should be oversized beyond the capacity required at the final balanced load condition. The condenser must adequately

handle load during the first stages of pulldown, when system capacity is substantially greater than at final condition.

If pulldown load is sizable, as in most water or brine cooling applications, check the condenser performance when it is handling total heat rejection at maximum rated suction temperature (50 F for most compressors). Condenser size and water quantity must be adequate to handle this start-upload without resulting in excessive head pressure or excessive water pressure drop. As a rough guide, the selected condenser should have a maximum total heat rejection rating that is equal to or greater than the compressor heat rejection at pulldown conditions.

If this pulldown occurs infrequently, it may be possible to select a condenser for design conditions and on each start-uplimit compressor capacity by manually throttling suction gas flow. This can be done by partially closing suction valve but this will extend time required to reach design conditions.

If the pulldown is of short duration, such as on a direct expansion coil, suction temperature will drop very rapidly and more than likely design conditions will be reached before the compressor would cut out on high pressure. No oversizing of the condenser would be required.

Whenever possible, the selected condenser should never be of a larger size than the largest condenser that will match the compressor used and still be a standard combination. This should be considered especially when the condensers are to be used with 5F,H series open reciprocating compressors.

Fouling and Fouling Factors — Fouling in condenser tubes is result of a build-up of scale within tubes because of impurities in water. As a result, heat transfer is adversely affected. Fouling factors are a means of identifying degree of fouling.

Condensers should not be selected for less than 0.0005 fouling factor, even when high quality water is available. For lower quality water, use larger fouling factors from the condenser ratings, but temper factor according to operating conditions.

The following affect magnitude of fouling factor selected:

Percentage of yearly operating time.

Frequency of tube cleaning.

Condensing temperature.

Type of water treatment.

For instance, reduce fouling factor when the operating time is less than 4000 hours per year, when frequent cleaning of tubes takes place, or when low condensing temperatures exist.

37

Table 29 — Condenser Physical Data

CONDENSER SIZE

 

5F20

5F30

5F40

 

 

5F60

 

09RH

 

09RH

 

 

09RH

 

09RH

 

 

09RH

 

09RH

 

09RH

 

 

 

 

027

 

043

 

 

054

 

070

 

 

084

 

097

 

127

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOMINAL CAPACITY (Tons)

9.8

 

14.3

22.1

 

 

27.3

 

47.0

 

71.0

 

 

87

 

 

103

 

 

120

 

135

 

198

CONDENSER TYPE

 

Shell and Coil

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Shell and Tube

 

 

 

 

 

 

 

 

 

 

 

 

Net Weight (lb)

 

77

 

114

246

 

 

340

 

493

 

686

 

 

807

 

863

 

 

1028

 

1360

 

1635

 

 

 

 

 

 

 

 

 

 

SHELL

 

 

 

83/8

83/8

85/8

 

 

85/8

 

103/4

 

123/4

 

 

123/4

 

123/4

 

 

 

 

 

 

 

 

 

 

Outside Diameter (in.)

 

 

 

 

 

 

 

 

 

 

14

 

 

14

 

18

Length (in.)

 

 

 

285/

8

395/

8

63

 

 

 

74

 

 

771/

8

 

791/

4

 

 

951/

4

 

951/

4

 

 

993/

8

 

1231/

 

1001/

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

 

 

2

TUBES OR COIL

 

 

Coil

 

 

 

 

 

 

 

 

 

 

Tubes; Integral Fin; 40 Fins per Inch

 

 

 

 

 

 

 

 

Number (Total)

 

2

 

2

 

26

 

 

 

30

 

 

44

 

 

66

 

 

 

66

 

 

80

 

 

 

94

 

 

94

 

156

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Length (in.)

 

 

 

2951/

3875/

565/

8

 

 

675/

8

 

705/

32

 

705/

32

 

 

865/

32

 

865/

32

 

 

865/

32

 

1097/

 

865/

32

No. of Water Circuits

 

 

4

 

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

 

 

 

2 or 1

2 or 1

2 or 1

 

 

2 or 1

 

2 or 1

 

2 or 1

 

 

2 or 1

 

2 or 1

 

 

2 or 1

 

2 or 1

 

2 or 1

No. of Water Passes

 

 

 

4 or 8

 

 

4 or 8

 

3 or 6

 

3 or 6

 

 

3 or 6

 

3 or 6

 

 

3 or 6

 

3 or 6

 

3 or 6

CIRCUIT LENGTH (ft)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Single Circuit

 

49.2

64.6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Double Circuit (each)

 

24.6

32.3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Minimum (4 or 3 Pass)

 

 

 

18.0

 

 

21.6

 

17.0

 

16.9

 

 

20.9

 

20.9

 

 

20.8

 

26.7

 

20.8

Maximum (8 or 6 Pass)

 

 

 

36.0

 

 

43.3

 

34.0

 

33.8

 

 

41.8

 

41.8

 

 

41.6

 

53.4

 

41.6

SURFACE

Water Side

 

8.6

13.4

20.5

 

 

30.7

 

48.8

 

70.8

 

 

87.7

 

108.4

 

 

130.3

 

165.2

 

207.7

AREA (sq ft)

Refrig Side

 

43.6

65.8

66.4

 

 

99.5

 

158.0

 

229.0

 

 

284.0

 

352.0

 

 

422.5

 

536.3

 

672.4

MAX WORK.

Water Side

 

 

 

 

 

 

150

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

250

 

 

 

 

 

PRESS. (psig)

Refrig Side

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

385

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX REFRIG

R-12

 

30

 

41

 

80

 

 

 

94

 

 

163

 

217

 

 

268

 

239

 

 

309

 

397

 

527

STORAGE

R-22

 

27

 

37

 

74

 

 

 

86

 

 

148

 

197

 

 

243

 

226

 

 

280

 

360

 

478

CAP. (lb)

R-502

 

28

 

38

 

75

 

 

 

87

 

 

150

 

200

 

 

247

 

229

 

 

284

 

366

 

485

MIN REFRIG

R-12

 

2.0

 

3.0

 

14.0

 

 

16.0

 

37.0

 

41.0

 

 

51.0

 

51.0

 

 

78.0

 

100

 

126

OPERATING

R-22

 

1.8

 

2.7

 

12.7

 

 

14.5

 

33.0

 

37.0

 

 

46.0

 

46.0

 

 

71.0

 

91

 

114

CHARGE (lb)

R-502

 

1.9

 

2.9

 

13.1

 

 

15.0

 

34.4

 

38.2

 

 

47.3

 

47.3

 

 

73.0

 

94

 

118

 

Single

 

Inlet

1/2 FPT

3/4 FPT

(2) 11/4 FPT

 

(2) 11/4 FPT

 

(2) FPT

 

(2) 2 FPT

 

(2) 2 FPT

 

(2) 2 FPT

 

(2) 21/2 IPS

 

(2) 21/2 IPS

 

(2) 3 IPS

 

Ckt or

 

Outlet

1/2 FPT

3/4 FPT

11/2 FPT

 

 

11/2 FPT

 

21/2 FPT

 

3 FPT

 

 

3 FPT

 

3 FPT

 

 

4 IPS

 

4 IPS

 

5 IPS

WATER

Min Pass

 

 

 

 

 

 

 

 

 

 

 

 

CONN (in.)

Double

 

Inlet

(2) 1/ FPT

(2) 3/ FPT

11/ FPT

 

 

11/ FPT

 

2 FPT

 

2 FPT

 

 

2 FPT

 

2 FPT

 

 

21/ IPS

 

21/ IPS

 

3 IPS

 

Ckt or

 

 

2

 

4

 

4

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

2

 

 

 

 

Max Pass

 

Outlet

(2) 1 MPT

(2) 1 MPT

11/4 FPT

 

 

11/4 MPT

 

2 FPT

 

2 FPT

 

 

2 FPT

 

2 FPT

 

 

21/2 IPS

 

21/2 IPS

 

3 IPS

 

Gas

 

Type

 

 

 

 

 

 

 

 

 

 

 

 

 

Female-Solder

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REFRIG

Inlet

 

ODF (in.)

11/8

13/8

13/8

 

 

15/8

 

21/8

 

25/8

 

 

31/8

 

31/8

 

 

31/8

 

35/8

 

35/8

CONN

Liquid

 

Type

Female

-Solder

 

2-Bolt

 

Valve

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4-BoltValve

 

 

 

 

 

 

 

 

Outlet

 

ODF (in.)

1/

 

1/

 

7/

 

 

 

11/

 

 

13/

 

 

 

13/

 

 

 

 

15/

 

 

 

15/

 

 

 

 

21/

 

 

 

21/

 

21/

 

 

 

 

 

2

 

2

 

8

 

 

 

8

 

8

 

8

 

 

8

 

8

 

 

8

 

8

 

8

RELIEF VALVE (in.)

 

3/8 MPT

3/8 MPT

1/2 FPT

 

 

1/2 FPT

 

5/8 FL

 

5/8 FL

 

 

5/8 FL

 

5/8 FL

 

 

3/4 FL

 

3/4 FPT

 

(2) 3/4 FPT

WATER DRAIN & VENT PLUG (in.)

 

 

1/

 

 

 

1/

 

 

3/

 

 

 

3/

 

 

 

 

3/

 

 

 

3/

 

 

 

 

3/

 

 

 

3/

 

3/

 

 

 

 

 

 

 

 

 

4

 

 

 

4

 

 

8

 

 

8

 

 

 

8

 

 

8

 

 

 

8

 

 

8

 

8

WATER REG CONN (in.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1/

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEGEND

FL — Flare

FPT — Female Pipe Thread (in.)

IPS — Iron Pipe Size(Butt-weldedconnection)MPT — Male Pipe Thread (in.)

ODF — Outside Diameter Female (in.)Psig — Pounds Per Square Inch Gage

NOTES:

1.Based on R-22at 105 F condensing, 85 F entering water temperature, 10 F rise. The 09RH097 is rated at 10.6 F rise in order to stay within the recommended water velocity range.

2.90 F liquid, 80% filled.

3.Purge and liquid test cocks furnished on all condensers.

4.5F40 and larger condensers have cleanable and renewable tubes.

Table 30 — Max Condenser Tube Water Velocity

OPERATING HOURS

MAXIMUM TUBE

WATER VELOCITY

PER HOUR

(fps)

 

Up to 1500

15.0

2000

14.0

3000

13.0

4000

12.0

6000

10.0

8000

8.0

Table 31 — Condenser Gpm at Various Water Velocities*

 

 

 

MINIMUM PASS†

 

 

 

 

MAXIMUM PASS**

 

 

CONDENSER

 

 

 

 

 

Water Velocity (fps)

 

 

 

 

 

 

3

5

7

9

10

12

3

5

7

9

10

12

5F20

6

11

15

20

22

24

3

5

8

10

11

12

5F30

8

15

22

29

32

32

4

7

11

14

16

16

5F40

16

27

39

50

56

64

8

14

19

25

28

32

5F60

20

35

50

65

72

80

10

17

25

32

36

40

09RH027

42

70

98

126

140

168

21

35

49

63

70

84

09RH043

63

105

147

189

210

252

31.5

52.5

73.5

94.5

105

126

09RH054

63

105

147

189

210

252

31.5

52.5

73.5

94.5

105

126

09RH070

79

131

183

236

262

316

39.5

65.5

91.5

118

131

158

09RH084

93

155

216

279

310

372

46.5

77.5

108

139.5

155

186

09RH097

93

155

216

279

310

372

46.5

77.5

108

139.5

155

186

09RH127

148

247

346

445

494

592

74.0

123.5

173

222.5

247

296

LEGEND

ARI — Air Conditioning and Refrigeration Institute

*Within ARI Standard recommendations.

†Double circuit for 5F20 and 30. **Single circuit for 5F20 and 30.

Water velocity formulas: (Use for velocities above 12 fps.)

gpm x 0.92 5F20 Condenser: V = no. of circuits

5F40 through 09RH127: V = gpm x passes x 1.06 total tubes

gpm x 0.65 5F30 Condenser: V = no. of circuits

38

Water Circuiting Arrangements — The water circuiting arrangement selected for 5F and 09RH condensers depends on available condenser water pressure, temperature, quantity and source. Refer to Table 32.

Refer to the Carrier System Design Manual for specific information and recommendations for refrigerant and water piping.

Economics — Selection of a condenser requires balancing of certain economic variables, including:

1.First cost of compressor-condensercombination.

2.Operating costs.

3.Ratio between power costs and water costs.

Where first cost is the most important consideration, the best combination of compressor and condensers has the lowest total equipment cost.

If owning and operating costs are important, combination must be selected on basis of both considerations.

A condenser selection that permits operation of the system at a low condensing temperature, results in the lowest compressor motor brake horsepower and consequently, lowest operating cost. A condenser selection that is heavily loaded requires the compressor to operate at a higher condensing temperature and results in higher compressor motor brake horsepower and operating cost.

For a given compressor-condensercombination, selection of a condensing temperature may depend on a ratio between power costs and water costs, on quantity of water available, on condensing temperature required to achieve compressor capacity, or a requirement to remain within allowable loading on a given motor size.

Condenser Performance with Ethylene Glycol — Increased use of closed circuit cooling towers has led to a corresponding increase in the need for shell and tube condenser ratings for use with ethylene glycol. When towers are installed outdoors, a brine solution is required for freeze protection during winter operations.

In most outdoor installations, specifications will call for a percentage of concentration of ethylene glycol or other brine solution. If concentration is not specified, it may be the choice of the contractor to determine a percentage of glycol concentration to ensure against freeze-upduring winter minimum design ambients.

To perform simplified selection, use Fig. 22 to convert a condenser water rating to a brine rating.

EXAMPLE:

Assume that a building with a year-roundcooling load has a cooling requirement of 120 tons during summer design conditions. Chilled water design temperatures are 54 F entering to 44 F leaving, and for summer duty, the condenser water is based on 85 F and a 10 degree rise.

From product literature, selected unit will deliver 121 tons at 105.8 F saturated discharge temperature (SDT) and has 153 tons of heat rejection.

Determine condenser loading factor by use of following formula:

LF =

THR

SDT – 1.5 line loss – EWT

=

153

(105.8 – 1.5) – 85

= 19.3153 = 7.9

Where: EWT — Entering Water Temperature LF — Loading Factor

THR — Total Heat Rejection

The 85 F value is return water temperature from closed circuit cooler.

Entering condenser rating data at loading factor of 7.9, 300 gpm are required to maintain design condensing temperature. Next, determine the rise by:

Rise = THR x 24

Gpm

= 153 x 24 = 12.2 degrees 300

If a more precise rise is desired, go back and assume a slightly different condensing temperature, recalculate the loading factor and rise and repeat the procedure until a final balance is found.

For this example, condenser water pressure drop is approximately 9.4 ft for the design 300 gpm flow rate. Using Fig. 22, flow rate correction can be determined for any glycol concentration versus water in shell and tube condensers.

Continuing with example, assume specifications required protection against freeze-upat an ambient of 0° F. (A glycol concentration that provides protection between 10 and 15 degrees below expected minimum ambient has been the design criteria for many years.)

In a condenser system, the use of proper ethylene glycol brine concentration is important because of the phenomenon that commonly published freeze points are not freeze points but are the point of crystallization where the first crystals begin to form. Actual freezing into a solid occurs at much lower temperatures. For example, freeze point of 20% ethylene glycol is given as +16 F but does not become a solid until it reaches –50F; 35% ethylene glycol with a freeze point of–6F does not become solid until it reaches–120F. Consequently, 20% glycol solution will take care of most domestic applications and 35% brine should satisfy the rest. The lowest concentration of brine will be the most efficient and result in considerable energy conservation.

Entering Fig. 22 at 0° F crystallization point, necessary concentration of glycol is either 32.5% by weight or 30% by volume. Next, determine glycol flow rate:

Glycol Flow Rate =

THR (tons) x Glycol Factor (GF)

Rise

Table 32 — Condenser Water Circuiting

WATER CIRCUITING

CONDENSER SIZE

CONDENSER

NORMAL USE

ARRANGEMENTS

CHARACTERISTICS

 

 

Double Circuit

5F20, 5F30

High Water Quantity

 

4 Passes

5F40, 5F60

Cooling Tower

Low Pressure Drop

3 Passes

All 09RH

 

 

 

Single Circuit

5F20, 5F30

Low Water Quantity

 

8 Passes

5F40, 5F60

City or Well Water

High Pressure Drop

6 Passes

All 09RH

 

 

 

39

Determine glycol factor (GF) by entering Fig. 22 at proper glycol concentration and reading left from glycol factor line — in this case a glycol gpm factor of 33.5.

Glycol Flow Rate = 153 x 33.5 = 513 Gpm

10

Therefore, at 32.5% by weight ethylene glycol specified and used to satisfy design conditions, a flow rate of 513 gpm of brine solution would be required and this value used to select a closed circuit cooler. Closed circuit cooler selection can be made from the manufacturer’s literature or by contacting the local representative.

With the increase in brine flow rate, the rise will now be:

Rise =

THR x 24

Gpm

=153 x 33.5

513

=10 degrees

Next determine the glycol pressure drop.

Equiv Water Flow = Glycol Flow x Press. Drop Factor

Pressure drop factor can be determined by entering Fig. 22 at the proper concentration of glycol solution (30% by volume), going to the pressure drop factor line and reading right to the pressure drop factor. For this example the factor is 1.1.

Equiv Water Flow = 513 x 1.1

=564 Gpm

Entering condenser water pressure drop curve in product literature at 564 gpm, the brine pressure drop can be determined. Note there will be an increase in flow rate and pressure drop with ethylene glycol as compared to a straight water cooling system.

In conclusion, add a glycol solution to a condenser system only when conditions warrant. Do not add more than is required. When glycol is used, proper control of inhibitor concentration is necessary to maintain design properties of solution and prevent corrosion.

CRYSTALLIZATION POINT

-30

-20

-10

0

+10

+20

+30

 

 

 

% E.G. (BY VOLUME)

 

 

 

 

 

0

5

15

 

30

 

 

45

FACTORDROP

 

70

 

 

 

FACTOR

 

 

1.1

 

 

 

 

 

 

 

 

1.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P

 

 

 

 

PRESSURE

 

 

 

 

 

 

 

POINT

1.0

 

60

 

 

 

CRYSTALLIZATION

 

 

 

 

 

 

 

 

 

FACTOR

50

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GPM

 

 

 

 

 

 

 

 

 

GLYCOL

40

 

 

 

 

 

FACTOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GPM

 

 

 

 

 

 

 

GLYCOL

 

 

 

 

 

 

 

 

 

 

 

 

 

30

 

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

 

 

0

10

20

 

30

 

40

50

 

 

 

 

% E.G. (BY WEIGHT)

 

 

 

WATER TO GLYCOL FLOW

RATE CORRECTION

NOTES:

1.Determine % concentration at required crystallization point.

2.Determine glycol flow rate (gpm).

Glycol Flow =

THR (tons) x Glycol Factor

Rise

3.Determine glycol pressure drop.

Equivalent Water Flow = Glycol Flow x p Factor

Enter condenser water p curves at equivalent water flow rate. Result equals glycolp.

Fig. 22 — Water to Glycol Flow Rate Correction

Copyright 2002 Carrier Corporation

 

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book

2

2

4

4

 

New Book

3

PC 802 Catalog No. 510-509Printed in U.S.A. Form5F,H/09RH-2XAPg 408-02

Replaces: 5F,H/09RH-1XA

 

 

 

 

 

 

 

Tab

DE1

 

 

Tab

2a

4a

3a

4b