Refrigerant Charge Determination. The approximate amount of refrigerant charge required by the system varies based on the total length of the refrigerant lines and the size of the chiller. Referring to Figure 5, determine the amount of charge based on the horsepower of the chiller and the amount of charge based on discharge and liquid line sizes and lengths. Add these three numbers together to find the final operating charge. The final operating charge must be verified by running the system and checking the liquid line sight glass.

Figure 5: Refrigerant Charge Determination

Chiller Condenser Charge

Field Installed Piping Charge

Horsepower

Lbs. of

 

R-22

5

5.9

7.5

6.1

10

10.8

15

12.6

20

21.2

25

24.2

30

40.2

35

41.2

40

50.2

Pipe O.D.

Discharge Line

Liquid Line

Inches

c R-22(Lbs.)

c R-22(Lbs.)

1/2”

-

7.2

5/8”

-

11.5

7/8”

1.6

24.0

1 1/8”

2.7

40.9

1 3/8”

4.0

62.2

1 5/8’

5.7

88.1

2 1/8”

10.0

153.0

2 5/8”

15.0

236.0

cBased on 100 feet of pipe, 100 ºF Liquid, 100 ºF Discharge

Oil Charge Determination. The remote air-cooled portable chillers are factory charged with the amount of oil required without field-installed piping. Additional oil required is dependent on the amount of additional refrigerant added.

Calculate the amount of additional oil required by using the following formula: Pints of oil (Sunisco 3GS) = lbs. of R-22 added for field installed piping / 100.

2-40 HP Portable Chillers

Chapter 3: Installation

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Sterling A0554831 manual Refrigerant Charge Determination, Chiller Condenser Charge Field Installed Piping Charge
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A0554831 specifications

The Sterling A0554831 is a versatile and powerful tool designed for a range of applications, particularly in the industrial and construction sectors. Known for its robust construction and reliability, it has gained popularity among professionals and DIY enthusiasts alike.

One of the main features of the Sterling A0554831 is its durable build quality, which is designed to withstand harsh working conditions. The device typically features a high-strength casing that protects it from dust, moisture, and impact, ensuring longevity even in the most demanding environments. Its ergonomic design allows for comfortable handling, minimizing user fatigue during extended use.

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Safety features are also a priority with the Sterling A0554831. Many models are equipped with overload protection and safety switches that prevent accidental activation, safeguarding the user during operation. Additionally, some variants may include LED indicators that provide real-time information about battery life or operational status, enhancing overall user experience.

In conclusion, the Sterling A0554831 stands out in the market for its combination of durability, performance, and versatility. With advanced technologies that cater to a wide range of applications and a design focused on user comfort and safety, this tool is an excellent choice for professionals looking for dependable and effective solutions in their work. Whether you are a seasoned professional or a casual DIYer, the Sterling A0554831 is well-equipped to handle your needs with ease and efficiency.
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