Low Pressure Cutout

This electro-mechanical cutout device opens the compressor control circuit if refrigeration system compressor suction pressure drops below 15 psi. It automatically resets when refrigerant suction pressure reaches 30 psi.

Note: The low pressure cutout is an automatic reset device typically mounted on the compressor suction line inside the mechanical cabinet. Call a refrigeration service technician to analyze the problem and reset the control.

Fan Cycling Switch

Air-cooled models only. 5 hp and 7.5 hp models have one fan. The fan cycling switch turns on the fan when the discharge pressure in the condenser reaches 300 psi and turns it off when the pressure drops below 190 psi.

10 hp to 30 hp models have two fan blowers. One fan blower runs continuously every time the compressor operates. The second fan turns on when the discharge pressure in the condenser reaches 300 psi and turns off when the pressure drops below 190 psi.

Pressure Switch

2 hp and 3 1/2 hp models have a pressure switch cutout device mounted in the process piping. The switch shuts down the chiller if it senses that the water/glycol pressure through the evaporator has dropped below an acceptable level. The pressure switch opens the control circuit, shuts down the pumps, and shuts off the chiller.

Flow Switch

5 hp to 40 hp models only. The flow switch cutout device, mounted in the process piping, shuts down the chiller if senses that the water/glycol flow rate through the evaporator has dropped below an acceptable level. The flow switch opens the control circuit and shuts down the pumps and the chiller.

Remote Start/Stop Interlock

An additional contact is provided to allow the remote starting or stopping of the chiller. To use this feature, remove the jumper between terminals X1 and 1, and supply a switch or dry contact interlock connected in series between these two terminals. Refer to the schematic inside the control enclosure door.

2-40 HP Portable Chillers

Chapter 2: Functional Description

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Sterling A0554831 manual Low Pressure Cutout, Fan Cycling Switch, Pressure Switch, Flow Switch, Remote Start/Stop Interlock
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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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