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If you&#;re in the market for a refrigeration compressor replacement, choosing the right compressor is critically important to improve the energy efficiency as well as the reliability of your refrigeration system. This will have a positive impact on your operating costs, while also ensuring conformity with DOE&#;s new compliance guidelines for commercial refrigeration.
Whether the old compressor model is no longer available, or you want a more energy efficient system, the following factors could help you determine the proper refrigeration compressor for your application.
In refrigeration applications, compressors are typically required to operate at more than one condition. While a two-stage or a variable-speed compressor may be ideal for refrigeration applications characterized by variable load conditions, a single-stage compressor that operates at 100% capacity during the &#;on&#; cycle can be a better option for light-duty. If you&#;re searching for a single-stage compressor, Compressors Unlimited makes available a few compressor models that provide exceptional reliability, such as the 4DL, 6DL, 06ER150, 06ER175 and the 06DR.
Because different compressor models are designed to work with specific refrigerants, the refrigerant can also play an important role in compressor selection. The easiest way to find out the refrigerant required is to check the compressor&#;s label or specifications. Additionally, EPA&#;s Significant New Alternatives Policy (SNAP) provides information about the refrigerants approved for use in the United States.
Whether you have a high-pressure, a medium-pressure, or a low-pressure system is another important consideration. That is because the type of system indicates the suction and discharge pressure/temperature ranges over which the compressor will need to operate. While high-pressure systems need compressors that can function at temperatures above 23°F, low-pressure systems can work with compressors that operate at temperatures below -4°F. Medium-pressure systems require compressors that can withstand temperatures between -4°F and 23°F.
One of the most confusing aspects when selecting a commercial refrigeration compressor is the capacity. To choose the right compressor for a refrigeration application, the capacity should be considered in relation to temperature and pressure levels. That is because the volume occupied by refrigerant vapor molecules varies according to the temperatures and pressures within the system. For instance, a compressor will contain significantly more refrigerator vapor at 200 psi than at 50 psi, even though the number of cylinders and the diameter of each cylinder bore remain constant. Compressor capacity is expressed in cubic feet per minute (CFM) or cubic feet per hour (CFH). Because the CFM or CFH rating is directly proportional to the cooling capacity of the compressor, a higher rating indicates a higher cooling capacity.
The motor&#;s efficiency and horse power (HP) are two more factors you need to take into account when selecting a refrigeration compressor. As an example, a compressor with a low HP rating may not be right for an application even if it meets the capacity requirements.
Another important aspect is the starting torque. Refrigeration compressors featuring motor systems with low starting torque (LST) should be used only in systems with capillary tubes and pressure equalization before each startup. Compressors that start with non-equalized pressures require motors with a high starting torque (HST). These compressors can be used in systems incorporating capillary tubes as well as in systems with expansion valves.
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Commercial refrigeration compressors are divided into three main categories:
Reciprocating commercial compressors &#; Reciprocating compressors are suitable for refrigeration applications of up to 100 tons. Depending on system specifications, multiple reciprocating compressors can be used in applications with loads that exceed 100 tons.
Rotary compressors &#; There are three types of commercial rotary compressors commonly used in commercial refrigeration applications: vane compressors, scroll compressors, and screw compressors. While rotary-vane compressors are suitable for applications of up to 5 tons and scroll compressors are recommended for applications with a capacity range from 1 and 30 tons,
Although considering all these aspects can help you select the right refrigeration compressor for a refrigeration system, the compressor needs to match exactly the specifications of your application for a truly efficient and reliable operation. If you don&#;t know whether a specific compressor make and model is suitable for your refrigeration system, our friendly professionals can guide you every step of the way, from selecting to ordering the compressor, parts and accessories you need.
Getting the right size refrigerator compressor is crucial for efficiency, performance, and durability. Oversized compressors cycle off too quickly, leading to an increasing in the pressure and temperature. Undersized units struggle to maintain desired temperatures, running constantly, which shortens their lifespan and risks food safety.
We suggest looking at the model number of your current compressor unit to find similar specifications. If you don't have access to the worn compressor, find the refrigerator model number instead. Knowing the parts you're working with can simplify the process of replacement.
Larger compressors have faster rates of refrigerant circulation than smaller compressors. Small compressors also tend to operate more quietly than larger compressors. In most cases, the relative size of the compressor depends on the type of cooling system being repaired.
With the old model number, you can call the manufacturer or one of our support representatives for a compatible replacement, hassle-free.
If that method doesn't help (or the sticker faded), take the following into consideration:
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