leaving water temperature range is also required. See Figure 2 on page 17 for lengths of refrigerant valves and fittings.

Liquid Line Sizing. The liquid line should be sized as small as possible while maintaining acceptable pressure drop to minimize the refrigerant charge. Liquid line risers must not exceed 15 feet from the base of the air-cooled condenser. Horizontal runs do not require a pitch. Insulation is not required unless the line is installed in a high ambient area, i.e., boiler room. Install a liquid line-charging valve to facilitate refrigerant charging. See Figure 3 on page 17 for sizing information. See Figure 5 on page 19 for charge determination.

Discharge Line Sizing. For horizontal runs, the discharge line should be pitched downward, in the direction of flow, at a rate of 1/2” for every 10 feet. This will allow oil to flow towards the condenser. Discharge line sizing is based on the velocity required for sufficient oil return back to the compressor. See Figure 4 on page 18 for discharge line sizing.

Figure 2: Equivalent Length in Feet for Valves and Fittings

Line Size

Angle

Short

Long

OD (inches)

Valve

Radius EL

Radius EL

3/8

24

4

2.8

1/2

24

4.7

3.2

5/8

25

5.7

3.9

3/4

25

6.5

4.5

7/8

28

7.8

5.3

1-1/8

29

2.7

1.9

1-3/8

33

3.2

2.2

1-5/8

34

3.8

2.6

2-1/8

39

5.2

3.4

2-5/8

44

6.5

4.2

Figure 3: Liquid Line Sizing

5 TON CIRCUIT

 

 

Liquid Line Size (OD")

 

Total Equiv.

Horizontal

Upflow

Upflow

Upflow

or

Length (Ft)

Downflow

1-5 Ft

6-10 Ft

11-15 Ft

25

1/2

1/2

1/2

1/2

50

1/2

1/2

1/2

1/2

75

1/2

1/2

1/2

1/2

100

1/2

1/2

1/2

5/8

125

1/2

1/2

1/2

5/8

150

1/2

1/2

5/8

5/8

175

1/2

5/8

5/8

5/8

200

1/2

5/8

5/8

5/8

225

1/2

5/8

5/8

5/8

250

5/8

5/8

5/8

5/8

275

5/8

5/8

5/8

5/8

300

5/8

5/8

5/8

5/8

7.5 TON CIRCUIT

 

 

Liquid Line Size (OD")

 

Total Equiv.

Horizontal

Upflow

Upflow

Upflow

or

Length (Ft)

Downflow

1-5 Ft

6-10 Ft

11-15 Ft

25

5/8

5/8

5/8

5/8

50

5/8

5/8

5/8

5/8

75

5/8

5/8

5/8

5/8

100

5/8

5/8

5/8

5/8

125

5/8

5/8

5/8

5/8

150

5/8

5/8

5/8

5/8

175

5/8

5/8

5/8

3/4

200

5/8

5/8

5/8

3/4

225

5/8

5/8

5/8

3/4

250

5/8

5/8

3/4

3/4

275

5/8

5/8

3/4

3/4

300

5/8

5/8

3/4

3/4

GP Series Portable Chillers

Chapter 3: Installation

17 of 64

Page 16 Page 18
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Image 17
Sterling 882.93092.00 specifications Equivalent Length in Feet for Valves and Fittings
Page 16 Page 18

882.93092.00 specifications

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