Air-Cooled Models—Self-Contained Compressor

Table 6

Equivalent lengths (feet) for various pipe fittings

 

 

 

 

 

 

 

 

 

 

 

Copper Pipe

90 Degree

90 Degree

45 Degree

 

Gate

Globe

Angle

O.D. in.

 

Elbow Copper

Elbow Cast

Elbow

Tee

Valve

Valve

Valve

1/2

 

0.8

1.3

0.4

2.5

0.26

7.0

4.0

5/8

 

0.9

1.4

0.5

2.5

0.28

9.5

5.0

3/4

 

1.0

1.5

0.6

2.5

0.3

12.0

6.5

7/8

 

1.45

1.8

0.8

3.6

0.36

17.2

9.5

1-1/8

 

1.85

2.2

1.0

4.6

0.48

22.5

12.0

1-3/8

 

2.4

2.9

1.3

6.4

0.65

32.0

16.0

1-5/8

 

2.9

3.5

1.6

7.2

0.72

36.0

19.5

Refrigerant trap = 4 times equivalent length of pipe per this table.

 

 

 

 

Table 7

Indoor unit refrigerant charge lb (kg)

 

 

R407C

 

 

 

 

 

 

 

Approximate Charge

 

Model

 

lb (kg)

 

42A/40A

 

0.9 (0.4)

 

 

 

 

 

67A/65A

 

1.4 (0.6)

 

 

 

 

 

Table 8

Line charges - refrigerant per 100 ft. (30 m) of Type “L” copper tube

 

 

 

 

 

 

 

 

 

R407C

 

 

 

 

 

 

 

 

Liquid Line

Hot Gas Line

 

O.D.

 

lb (kg)

lb (kg)

 

1/2"

 

7.3

(3.3)

1.3 (0.6)

 

 

 

 

 

 

5/8"

 

11.7 (5.3)

2.1 (1.0)

 

 

 

 

 

 

3/4"

 

16.6 (7.5)

3.0 (1.4)

 

 

 

 

 

 

 

7/8"

 

24.4

(11.1)

4.4 (2.0)

 

 

 

 

 

 

 

Table 9

Condenser refrigerant (per serial tag)

 

 

 

 

 

R407C

 

 

 

 

 

Approximate Charge

 

 

lb (kg)

 

 

 

 

 

 

 

Liebert

 

Model

Fan Speed

Lee-Temp*

 

083

8 (3)

25 (12)

 

 

 

 

 

104

9 (4)

37 (17)

 

 

 

 

 

165

15 (6.8)

50 (22.7)

 

 

 

 

 

*Charge includes the receiver charge.

3.4Fan Speed Control Systems

The Variable Fan Speed Control systems (FSC & VFD) uses pressure-activated electronic fan speed control systems and remotely located thermostat(s) to ensure operation at ambient temperatures as low as 0°F (-18°C). For this ambient temperature range, the VFD Control Condenser must be used with digital scroll indoor units and can be used for energy savings with any Liebert Challenger 3000 unit.

Variable Fan Speed Control Piping

A discharge line and a liquid line must be field-installed between the indoor unit and the outdoor con- denser. See Figures 15 and 16 for details.

26

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Emerson 3000 Fan Speed Control Systems, Variable Fan Speed Control Piping, Indoor unit refrigerant charge lb kg

3000 specifications

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