CyberChiller Series Installation, Operation & Maintenance Manual

NOTE

In the following (3) charts, the line sizes represent the sizing for individual refrigeration circuits. CyberChiller units have two separate pairs of refrigeration lines. (One per compressor.)

Equivalent Length (ft) of Straight Pipe

OD (In.)

Globe

Angle

90º

45º

Tee

Tee

Line Size

Valve

Valve

Elbow

Elbow

Line

Branch

 

 

 

 

 

 

 

1/2

9.0

5.0

0.9

0.4

0.6

2.0

5/8

12

6.0

1.0

0.5

0.8

2.5

7/8

15

8.0

1.5

0.7

1.0

3.5

1-1/8

22

12

1.8

0.9

1.5

4.5

1-3/8

28

15

2.4

1.2

1.8

6.0

1-5/8

35

17

2.8

1.4

2.0

7.0

2-1/8

45

22

3.9

1.8

3.0

10

2-5/8

51

26

4.6

2.2

3.5

12

3-1/8

65

34

5.5

2.7

4.5

15

3-5/8

80

40

6.5

3.0

5.0

17

 

 

 

 

 

 

 

Recommended Liquid Line Sizes (For R-22 or R-407C Refrigerant)

Model No./

Receiver to Evaporator (Equivalent Ft.)*

Total Unit

50'

100'

150'

 

Capacity

or less

or less

or less

 

 

 

 

 

120 / 120,000

1/2

5/8

5/8

 

210 / 210,000

5/8

7/8

7/8

 

260 / 260,000

7/8

7/8

7/8

 

320 / 320,000

7/8

7/8

7/8

 

 

 

 

 

 

*Equivalent Ft. accounts for the linear pipe length as well as equivalent length of Valves, Elbows & Tee’s as shown in the previous chart.

Recommended Discharge Line Sizes(For R-22 or R-407C Refrigerant)

Model No./

 

Equivalent Length Ft.*

Total Unit

50'

100'

150'

Capacity

or less

or less

or less

 

 

 

 

120 / 120,000

7/8

1-1/8

1-1/8

210 / 210,000

1-1/8

1-1/8

1-3/8

260 / 260,000

1-1/8

1-3/8

1-3/8

330 / 330,000

1-1/8

1-3/8

1-3/8

 

 

 

 

NOTE

Vertical runs are based on a total rise of 30 equivalent feet. For longer sizes, individual calculations must be made. Sizes assume the use of single risers; double risers may be necessary.

*Equivalent Ft. accounts for the linear pipe length as well as equivalent length of Valves, Elbows & Tee’s as shown in the previous charts.

2.5.2.2Water/Glycol Fluid Cooled Systems

Piping connections for the water/glycol fluid coolers are sweat connections. (See Figure 4.) Pipe sizes may not necessarily be the same as the unit connec- tion. Piping should be sized to match the system pressure drop and pump capacity and may require a reducing fitting to match the connection size on the pump package and CyberChiller.

Copper is adequate for closed loop systems and ground water which is not high in mineral content and is pH neutral. In situations where scaling could be heavy, or where biological growth will be present, a closed loop system is recommended. Untreated water in the unit heat exchangers may cause, over a period of time, a loss of heat exchange capacity due to a mineral deposit build-up inside the exchanger. Only a qualified service mechanic should clean these.

Glycol-cooled systems with low entering fluid temperatures should have insulated piping. The recommended ethylene glycol solution ratio is 40% glycol to 60% water. (SATS recommends Dowtherm SR1 manufactured by Dow Chemical Co.) Use only ethylene glycol with inhibitors for corrosion protection.

(©October, 2006)

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