Heatcraft Refrigeration Products HCS manual Face Areas- Air Pressure Drops, Dry Coils

Page 40

Face Areas- Air Pressure Drops, Dry Coils

Face Area of Coils, And Filters ( Used to Compute Velocity for Air Pressure Drop)

Face Area

 

 

 

 

 

Air Handler Unit Size

 

 

 

 

 

 

Square Feet

03

06

08

10

12

14

18

20

 

26

34

41

50

65

75

Steam coils:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Large Type 5 Coils

2.75

5.28

7.50

9.38

11.69

13.75

16.88

19.25

 

25.50

34.00

40.38

47.25

——

——

Large Type 8 Coils

——

——

——

——

——

——

——

——

 

——

——

——

——

62.00

72.33

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Water & Refrigerant:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Large Type A Coils

3.13

5.76

7.81

9.77

12.40

14.58

17.71

20.05

 

26.56

33.65

40.73

50.63

64.58

75.35

Large Type 5 Coils

3.00

5.69

7.50

9.38

11.69

13.75

14.58

16.71

 

25.50

34.00

40.38

49.50

64.58

74.92

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Filter Face Area:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Flat Filter Sections

5.00

6.94

10.00

11.11

15.00

17.50

22.50

24.44

 

31.11

38.89

46.67

54.40

73.33

82.50

High Capacity Sections

10.00

13.89

16.67

19.44

22.22

25.00

37.50

31.94

 

40.28

64.44

80.56

104.17

137.50

160.42

High Efficiency Section

6.00

8.00

12.00

14.00

14.00

18.00

24.00

24.00

 

30.00

40.00

50.00

60.00

66.00

88.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Type A (1/2" O.D.) Dry Coil Air Pressure Drop*

Rows

Fins

Air Velocity^ - Feet per minute

 

 

 

 

400

450

500

550

600

650

700

 

6

0.05

0.05

0.07

0.08

0.09

0.10

0.11

 

8

0.06

0.07

0.08

0.09

0.11

0.12

0.14

1

10

0.07

0.08

0.10

0.11

0.13

0.15

0.17

 

12

0.08

0.10

0.11

0.13

0.15

0.17

0.19

 

14

0.09

0.11

0.13

0.15

0.17

0.19

0.21

 

6

0.09

0.11

0.13

0.15

0.18

0.20

0.23

 

8

0.11

0.14

0.16

0.19

0.22

0.25

0.28

2

10

0.14

0.16

0.19

0.23

0.26

0.29

0.33

 

12

0.16

0.19

0.22

0.26

0.30

0.34

0.38

 

14

0.18

0.22

0.25

0.29

0.34

0.38

0.43

 

6

0.14

0.16

0.20

0.23

0.26

0.30

0.34

 

8

0.17

0.21

0.24

0.28

0.33

0.37

0.42

3

10

0.20

0.25

0.29

0.34

0.39

0.44

0.50

 

12

0.24

0.29

0.34

0.39

0.45

0.51

0.57

 

14

0.27

0.32

0.38

0.44

0.50

0.57

0.64

 

6

0.18

0.22

0.26

0.31

0.35

0.40

0.46

 

8

0.23

0.27

0.33

0.38

0.44

0.50

0.56

4

10

0.27

0.33

0.39

0.45

0.52

0.59

0.66

 

12

0.32

0.38

0.45

0.52

0.60

0.68

0.76

 

14

0.36

0.43

0.51

0.59

0.67

0.76

0.85

 

6

0.27

0.33

0.39

0.46

0.53

0.60

0.68

 

8

0.34

0.41

0.49

0.57

0.66

0.75

0.84

6

10

0.41

0.49

0.58

0.68

0.78

0.88

0.99

 

12

0.47

0.57

0.67

0.78

0.89

1.01

1.14

 

14

0.54

0.65

0.76

0.88

1.01

1.14

1.28

 

6

0.36

0.44

0.52

0.61

0.71

0.81

0.91

 

8

0.45

0.55

0.65

0.76

0.87

0.99

1.12

8

10

0.54

0.66

0.78

0.90

1.04

1.18

1.32

 

12

0.63

0.76

0.90

1.04

1.19

1.35

1.52

 

14

0.72

0.86

1.02

1.18

1.35

1.52

1.71

 

 

 

 

 

 

 

 

 

Type 5 (5/8" O.D.) Dry Coil Air Pressure Drop*

Rows

Fins

 

Air Velocity^ - Feet per minute

 

 

 

 

400

450

500

550

600

 

650

700

 

6

0.07

0.09

0.11

0.13

0.15

 

0.17

0.20

 

8

0.09

0.11

0.13

0.16

0.18

 

0.21

0.24

1

10

0.11

0.13

0.16

0.18

0.21

 

0.25

0.28

 

12

0.12

0.15

0.18

0.21

0.24

 

0.28

0.31

 

14

0.14

0.17

0.20

0.23

0.27

 

0.31

0.35

 

6

0.13

0.17

0.20

0.24

0.28

 

0.32

0.37

 

8

0.17

0.21

0.25

0.29

0.34

 

0.39

0.44

2

10

0.20

0.24

0.29

0.34

0.40

 

0.45

0.52

 

12

0.23

0.28

0.33

0.39

0.45

 

0.51

0.58

 

14

0.25

0.32

0.37

0.43

0.50

 

0.57

0.65

 

6

0.20

0.25

0.30

0.36

0.42

 

0.48

0.55

 

8

0.25

0.31

0.37

0.44

0.51

 

0.59

0.67

3

10

0.30

0.36

0.43

0.51

0.59

 

0.68

0.77

 

12

0.34

0.41

0.50

0.58

0.67

 

0.77

0.87

 

14

0.38

0.46

0.55

0.65

0.75

 

0.86

0.97

 

6

0.27

0.33

0.40

0.48

0.56

 

0.65

0.74

 

8

0.33

0.41

0.49

0.58

0.68

 

0.78

0.89

4

10

0.39

0.48

0.58

0.68

0.79

 

0.91

1.03

 

12

0.45

0.55

0.66

0.78

0.90

 

1.03

1.16

 

14

0.51

0.62

0.74

0.87

1.00

 

1.14

1.29

 

6

0.40

0.50

0.60

0.72

0.84

 

0.97

1.11

 

8

0.50

0.62

0.74

0.87

1.02

 

1.17

1.33

6

10

0.59

0.72

0.87

1.02

1.19

 

1.36

1.55

 

12

0.68

0.83

0.99

1.16

1.35

 

1.54

1.75

 

14

0.76

0.93

1.11

1.30

1.50

 

1.71

1.94

 

6

0.54

0.67

0.80

0.96

1.12

 

1.29

1.47

 

8

0.67

0.82

0.99

1.17

1.36

 

1.56

1.78

8

10

0.79

0.97

1.16

1.36

1.58

 

1.82

2.06

 

12

0.91

1.11

1.32

1.55

1.80

 

2.06

2.33

 

14

1.02

1.24

1.48

1.73

2.00

 

2.28

2.58

 

 

 

 

 

 

 

 

 

 

Type 8 (1" O.D.) Dry Coil Air Pressure Drop*

Rows

Fin

 

Air Velocity^ - Feet

per minute

 

 

 

400

450

500

550

600

650

700

 

6

0.05

0.06

0.07

0.09

0.10

0.11

0.13

 

8

0.07

0.08

0.10

0.12

0.13

0.15

0.17

1

10

0.09

0.11

0.12

0.14

0.16

0.19

0.21

 

12

0.10

0.13

0.15

0.17

0.20

0.22

0.25

 

14

0.12

0.15

0.17

0.20

0.23

0.26

0.29

*Dry coil air pressure drop for air entering at 70 °F DB, 0 °F WB over rippled high efficiency fins. Inches of water. ^ Air velocity = CFM divided by coil face area in square feet. See table at top of page 40.

40

Image 40
Contents Air Handlers Index Quality StandardNomenclature Cabinet style Fan TypeStandard Unit Features Air Handler Coils Direct Expansion CoilsWater Coils Heat Reclaim CoilsConstruction & Dimensions Accessories- Electric HeatUnit Heater Dimensions Size Maximum KW Electric Heater Selection ExampleComponent 208 240 460 480 Accessories Auxilary Sections- All unit Sizes Dimensions, Page 29 to Filters And Auxiliary SectionsAccessories for Fan and Coil Sections Available Motors, Drives, Motor Starters per HorsepowerMotor Drive Starter Motor Horsepower Description ‘A’ = AvailableAir Handler Selection Selection ConditionsSelection Procedure Selection ExampleAir volume at Air handler DX air Refrigerant Chilled water Air Handler Performance Quick ReferenceSteam Cu m/hAir Handler Performance- Direct Expansion CoilSaturated Suction Temperature Air Handler Perfromance- Direct Expansion1339 1553Row Coils Air Handler Performance- Chilled WaterSize Air Area Air Handler Perfromance- Chilled Water Std FaceAir Handler Performance- Hot Water/Steam Heating 0F. AirHeating 60F. Air Size Air Sq. FtOne Row Two Row Two Row One RowCoil Perfromance- Heat Reclaim MBH/SQ FT Temperature DifferenceType a and Type 5, hot gas reclaim, heating capacities Refrigerant Evaporating Temperature F Coil Performance- Direct Expansion MBH/SQ FTActual capacity will vary With coil circuiting 400 450 500 550 600Coil Perfromance- Chilled Water MBH/SQ FT ChilledRows FPM, Type a Coils 1/2 DIA FPM, Type 5 Coils 5/8 DIACoil Performance- Heating, Water & Steam FPM, Type 5 Coils 5/8 DIA Rows500 600 650 700 400 FPM, Type 8 Coils 1 DIA RowsFan Performance SizeCoil Total Size 14 and Size RPM BHPSize 20 and Size 32 3/8 Airfoil Fan High Efficiency Filter Sections- Dimensions Dimensions inchesSize 65 and Size High Efficiency Filter SectionAccessory Flange Pattern Dimensions SizeMixbox Inlet Duct Connections Sizes 03 Sizes 20Dimensions ReferenceMix box Motor and coil connectionSizes 03 41 FC DischargeSizes 50 75 AF For All Units Sizes 10 1/812 5/8 Rows 15 5/8 MixboxDepth is dimension Dimension ‘T’Sizes 50 65 AF ‘D’ added toFor All Unit Sizes Sizes 03 Mounting Locations For Vibration IsolatorsSize Edge All mounting holes are 5/8 inch diameter Rows Inch filters For All Unit SizesOne and two row heating coils do not have Coil Section Vibration Isolators, Quantity RequiredModels Air Flow Reheat Position Preheat PositionNet Weights and Metal Gauges Weight in poundsTo estimate weights for other coils Air Handler Component Unit SizeFace Areas- Air Pressure Drops, Dry Coils Face Area Air Handler Unit Size Square FeetDepth Flat & hi 35% Efficient , Pleated Air Pressure Drops- Cabinets, Filters, Wet CoilsFin Air Velocity Feet Per minute Physical Data Unit Size CFM Range Cooling19.25 25.50 34.00 40.38 49.50 64.58 74.91 Small 16.04 21.25 27.63 31.88 40.50 51.67 59.42Mechanical Specification