Air Cooled Screw Chiller and Water Cooled Screw Chiller

Central Chiller

  • Central chiller capacity 40 ton to 500Ton
  • Air & water cooled central chiller available
  • Temperature controlling range 7℃ to 35℃
  • High-efficiency shell and tube evaporator
  • Branded Semi-hermetic screw compressor
  • Micro-computer temperature controller
  • Easy installation and maintenance

Your Premier Central Chiller Manufacturer and Supplier in China

Central chiller refers to any chiller unit or chiller system that can cool several processes throughout a plant at the same time

TopChiller is a professional central chiller manufacturer and supplier with rich experience, We have a full range of central chillers including air-cooled central chiller and water-cooled central chiller.

TopChiller is a custom manufacturer and supplier of central chillers with 2o years of experience since the year 1999.

Central chiller systems designed from TopChiller are available from cooling capacity 30Ton to 580 Ton.

The cooling capacities of centralized chillers come as single or dual-circuits with 1 or 2 scroll or screw compressor refrigeration systems which configurations to meet your processing requirements and ambient temperature.

Both scroll compressors and screw compressors can be used depending on the project site and industry demand.

The main component is a stand-alone chiller unit that must be connected by piping to a pump and a separate reservoir to function.

This central chiller system will typically have separate controls for the central chiller and the pump or pumps, with an electrical connection for each component.

The controls should ideally be wired together, to prevent the central chiller from cooling until the circulating pump is operating.

In another word, the terms central chiller refers to chiller systems that can cool several individual processes throughout one plant at the same time.

This means the central chiller will work as the function instead of some individual chiller units. We call this is an integrated chiller system.

The high-quality central chiller at TopChiller has some advantages and benefits as below:

① Small volume, large refrigerating capacity;

② High compression ratio, high EER value;

③ Compact structure, stable circular motion, low noise, small vibration;

④ Convenient adjustment, non-polar adjustment within the range of 10% – 100%, good energy-saving performance, and high efficiency under partial load;

With decades of years of experience and knowledge allows us to custom build central chillers for any industry and to any application.

Central chillers are widely used for various industries applications such as HAVC, big building&hotel air conditioning, central chilled water supply, chemical processing, die casting,food&beverage processing, pet food, Pharmaceutical, plastic processing, automotive, energy&power project, packing, and printing.

As a professional central chiller supplier, TopChiller has exported our high-quality central chillers throughout the world.

Our central chillers have been exported to the Philippines, Australia, New Zealand, Malaysia, Singapore, Indonesia, Chile, Mexico, Costa Rica, Brazil, Argentina, Colombia, South Africa, Nigeria, Saudi Arabia, Dubai, Spain, Italy, etc.

If you are finding a high-quality central chiller manufacturer, please do not hesitate to contact the TopChiller sales department to get your free central chiller solutions.

Central Chiller Technical Specifications

Central Chiller Central Chiller Central Chiller Central Chiller Central Chiller Central Chiller Central Chiller Central Chiller Central Chiller Central Chiller Central Chiller Central Chiller Central Chiller Central Chiller Central Chiller

central chiller spare parts

Chillers Related With Central Chiller

  • Central Chiller
  • Central Chiller
  • Air Cooled Screw Chiller
  • Water Cooled Screw Chiller

TopChiller: Your Leading Central Chiller Supplier and Manufacturer

The term “central chiller” refers to any centralized chiller system that can cool several processes throughout a plant at the same time.

A central chiller can be stationary or portable. The system requires a reservoir, pump, or pump to distribute the water or coolant to the processes.

Central chillers are Centralized Cooling systems that have numerous advantages over individual chiller units. Due to higher cooling capacity and steady running conditions.

Central chillers designed and manufactured by TopChiller feature a compact design, dependable, energy-efficient systems that are your source for continuous centralized process cooling down to -35°C.

TopChiller’s Central Chiller systems are available in 30 to 200 Ton cooling capacities, single or dual-circuit configurations to meet your processing requirements, and scroll compressors.

Our dependable, energy-efficient systems are your source for a continuous centralized process cooling down to -15°C.

There are 2 kinds of central chillers. They are an air-cooled central chiller and a water-cooled central chiller.

Water Cooled Central Chiller
Water Cooled Central Chiller

As a professional central chiller manufacturer with 20 years of experience, TopChiller offers a one-for-all cooling solution that is both electrical energy and cost-saving, this makes central chiller is the best choice for multi-processing cooling by using TopChiller central chiller.

Central Chiller: The Buying Guide for Importer

Central Chiller systems manufactured from TopChiller are available in 40 to 220 Ton cooling capacities, single or dual-circuit configurations to meet your processing requirements.

Both scroll compressors and screw compressors are available for your central chillers.

TopChiller dependable, energy-efficient central chiller systems are your cooling source for a continuous centralized process cooling down to  (-30°C).

By running only one central chiller system, You can provide enough cooling sources for all your process machines or production processes in a whole factory.

In this way, the centralized managed chiller plant can save not only save electricity consumption but also manpower and room space aiming to get a high cooling efficiency.

For Central Chillers, there are Air-Cooled Centralized Chillers and Water-Cooled Centralized Chillers.

The features of air-cooled Centralized Chillers:

  • Air-cooled Centralized Chillers are refrigeration systems that cool fluids to support industrial processes.
  • Ambient air is used to dissipate the process heat removed by the refrigeration system.
  • Cooling capacity from 30Ton to 200Ton
  • For process fluid temperatures between 20° – 70°F
  • Up to IP 65 can be installed outdoor
  • Both Scroll compressors and screw compressors are available
  • Microprocessor-based or PLC controller mounted in an operator-friendly orientation
  • Emergency stop button and Door disconnect switch
  • Push buttons, indicating lights and alarms
  • Pressure gauges and Brazed plate evaporator
  • Forklift access

The features of water-cooled centralized chillers:

  • Water-cooled Centralized Chillers are refrigeration systems that cool fluids to support industrial processes
  • Plant water (tower water, city water, or well water) is used to dissipate the process heat removed by the refrigerant system
  • These water-cooled centralized chiller units are designed for both indoor and outdoor installations.
  • For process fluid temperatures between 20° – 70°F
  • Centralized Chiller cooling capacity from 30Ton to 220Ton
  • Single or dual circuit configurations
  • Automatic compressor staging for capacity control
  • Electronic hot gas bypass for partial load conditions
  • Microprocessor controls
  • Green friendly refrigerants
  • Available for cooling all industries.
Central Chiller Flow Schematic
Central Chiller Flow Schematic

Both air-cooled Centralized Chiller and water-cooled Centralized Chiller can be manufactured with/without reservoirs or water pumps. This depends on your requirements.

Besides the above standard configuration of a central chiller, TopChiller can also provide some options. Please consult the factory for more information.

  • Audible alarm
  • C3 Cold Climate Coolers: Cost-effective solution to process cooling in cold weather areas.
  • A closed-circuit cooling system requires no make-up water or chemical treatment.
  • CPR valve
  • Evaporator manifold
  • Evaporator manifold with isolation valves
  • Evaporator strainer
  • Low-temperature ambient kit
  • Water-cooled condenser manifold
  • Water-cooled condenser manifold with isolation valves
  • Water-cooled condenser strainers
  • Visual alarm

With 20 years of experience in central chillers including both air-cooled Centralized Chiller and water-cooled Centralized Chiller, For TopChiller having a professional engineering team can provide a packaged central chiller solution for clients worldwide.

TopChiller offers the latest in high efficiency, reliable Central Chilling Systems. Combining smart technology with modular capabilities.

These central chillers are designed to reduce downtime and grow with expanding application needs.

Central chiller units are available in remote air-cooled and water-cooled models, and TopChiller offers a wide range of indoor chillers as well as outdoor chilling systems to free up valuable floor space.

Individual central chiller unit cooling capacities range from 20-220 tons and can be paralleled to reach up to 600 tons.

Some people don’t know the difference between a centralized chiller and a decentralized chiller, so they can’t find the right solution for their plant.

Please refer below some points, hope this article helps you to make the right choice between Centralized vs Decentralized Chillers

There are many different kinds of central chillers used in the industrial process.

In general, water-cooled central chiller systems are the most efficient and effective, followed by evaporated systems and vapor compression systems, and with air chilling machines as the least effective chilling model.

However, some factories still choose to use air cooling systems due to a lack of water in the area or in situations where the presence of moisture could damage a delicate manufacturing process.

Factories get to choose between centralized chilling systems and decentralized chilling systems. A centralized chilling system is located in a central location and has pipes connecting the chilling system to the other machines in the factory.

A decentralized chiller system gives each machine its specific cooling machine. Factories that have many machines that require the same cooling power often choose centralized systems, while factories that have machines that require different cooling temperatures and techniques typically choose decentralized systems.

Some factories have both if the majority of machines use the same cooling temperature and method with a select few requiring their special cooling systems.

No one cooling system is better than another in a factory. Other than the efficiency ratings of the different chilling styles, there is no great benefit from choosing one system over another.

Factories can save money by using a centralized chiller system, but not every factory can use a centralized chilling system to keep machines and manufacturing processes cool.

Centralized Chiller Case Study

We are the local manufacturers of commercial refrigeration, air-conditioning, and kitchen equipment here in Bahrain.

We are looking for a Centralized Chiller (Air-cooled) of 150 and 300 tonnes capacity.

Please send us the product details with technical specifications.

1. What’s your power supply?-V-Hz-Phase? 380-415V, 50-60HZ, 3 PHASE.

2. You prefer an air-cooled central chiller.- Air Cooled Central Chiller

3. The required cooling capacity is 150Ton to 300Ton. – We need One Unit of 300 tons & 150 Tons.

4. What’s refrigerant do you prefer? R407c or R134a

5. How about your ambient temperature? – 45 to 50 degrees.

Central chillers manufactured by TopChiller are used to cool machines, prevent sparks and other problems while fashioning parts, keep rooms cool, and prevent liquids from evaporating.

Numerous industries require central chillers and central chiller systems to accurately maintain the temperature during processing.

If you need an indoor air-cooled central chiller or an outdoor water-cooled central chiller, TopChiller has over 20 years of experience engineering, designing, and manufacturing central chillers for a variety of industries including chemical, pharmaceutical, plastic, laboratory, medical, industrial, among others.

Each central chiller is factory tested before shipment ensuring the chiller you receive delivers the accurate temperature control you expect and require.

Central Chillers from TopChiller are manufactured to meet your requirements. Whether you require an Indoor, Water-Cooled single compressor model or an Outdoor, Air-Cooled Dual Circuit configuration, the options are entirely up to you and your specifications.

High Efficient Central Chillers designed by TopChiller can save you up to 60% in energy costs and are designed to provide ease of maintenance for less downtime.

If you are looking for a reliable central chiller supplier, Please contact our refrigeration expert to customize your central chiller for your business.

Central Chiller-The Ultimate FAQ Guide by TopChiller

Industrial machinery tends to heat up when it keeps running for a long time generating a lot of excess heat.

This heat can be removed with the help of a Central Chiller for making the machinery cool and protected.

The heat in the machinery is produced because of various thermodynamic processes going on inside but this problem can be solved by using a Central Chiller.

Such a system can save your business and help you cut down on so many costs related to the maintenance of your industrial applications.

It is especially essential for large-scale industries where several machines are working at the same time.

You must consider the applications, the cost, the installation process, and the requirements of your Central Chiller before you are going purchase it.

Here is a complete guide on a Central Chiller. All you need to know about a Central Chiller is stated down below so that you can invest in the right one for your application.

1-What is a Central Chiller?

A Central Chiller is a refrigeration system that helps you save on utility bills and maintenance costs by removing the extra heat of your industrial applications.

Central Chiller works by displacing heat from one place that is mostly an Industrial machine or a processing unit of the Industry to the outside environment.

It needs a reservoir and a pump to pump the coolant or the water throughout the system to deal with the heat produced by industrial applications.

A Central Chiller capacity can vary between 2 to 200 tons, and you can choose one based on the size and weight you require for your applications.

It is used for large setups that require cooling on a huge scale. It uses water or any other liquid as a coolant which is circulated throughout the system to cool the machinery and other products.

It is also used in tool and die-cutting, beverage industry, lasers industry, chemical industry, injection molding, and many other applications.

2- What are Some Features of the Central Chiller?

Here are a few features on a Central Chiller that help it to be suitable for your industrial applications.

  • A Central Chiller is equipped with Scroll compressors.
  • It has a Microprocessor-based or PLC controller mounted in operator-friendly orientation.
  • It comes with an Emergency stop button and Door disconnect switch
  • There are several Pushbuttons, indicating lights and alarms on your chilling unit.
  • It comes with a NEMA 12 rated electrical enclosure
  • There are many Pressure gauges and a Brazed plate evaporator in a Central Chiller.
  • It also gives you Forklift access.

3- How Does a Central Chiller Work?

A Central Chiller works by removing heat from a machine and transferring it to the environment using a system of refrigeration.

It consists of a pumping system that is responsible for circulating a coolant such as water, or water plus glycol solution.

The coolant is circulated from the Central Chiller to the process.

The coolant removes the heat from the process and is returned as a warm fluid to the Central Chiller. So, here basically the coolant acts as the means for transferring heat.

A Central Chiller is equipped with a chemical compound named a refrigerant.

The basic working principle of a refrigerant is compression and phase change of the refrigerant from a liquid to a gas.

Then this gas again changes into a liquid. This continues throughout the refrigeration process.

The working of this Central Chiller can be explained through the refrigeration cycle.

It begins when the low-pressure liquid and gas mix enters the evaporator.

The heat from the process water or water plus glycol solution boils the refrigerant of the Central Chiller.

This leads to changing the low-pressure liquid into a low-pressure gas. This low-pressure gas is then transported to the compressor of the Central Chiller to be converted into a high-pressure gas.

This high-pressure gas now enters the condenser. Here, the condenser water or the ambient air removes the heat and produces a high-pressure liquid.

This high-pressure liquid is then transferred to the expansion valve which controls the amount of refrigerant released.

In this way, a whole cycle continues within the Central Chiller for achieving a suitable temperature.

There are two types of condensers used in Central Chiller; air-cooled and water-cooled.

An air-cooled condenser uses ambient air to cool and condense the hot refrigerant gas back down to a liquid.

It can be located inside the Central Chiller or can be remotely located outside, but ultimately it rejects the heat from the unit to the air.

In a water-cooled condenser, water from a cooling tower cools and condenses the refrigerant.

4- Is Portable Chiller Better than Central Chiller?

To answer this question, you must be well aware of your applications for the Central Chiller.

A new portable chiller is capable of providing high efficiency at low chilling loads, partial chilling loads, and full chilling loads. Also because of the variable speed compressor as compared to a chiller with conventional fixed-speed and digital-scroll compressor, a portable chiller delivers better energy savings. It can be expected to save 20 to 50 percent of energy.

To choose between one Central Chiller and the Portable Chillers, the most important thing to know is the overall processing mix in your plant.

As a rule, if 80% or more of a plant’s materials are processed within a ±5°F temperature range, a Central Chilling System will meet certain good conditions.

This includes less operating tonnage, floor space, and likely less daily maintenance than numerous portable units.

On the other hand, a properly sized portable chiller may be more effective because the materials processed have a variety of temperature requirements.

In some cases, a combination of chilling units—a Central Chiller designed to handle all but the lowest or highest temperatures, with portable chillers used for special or more extreme cooling needs—can be the best solution.

A Central Chiller is a one-time investment but it significantly helps you save up in the long run.

It not only requires more complex controls, automation, and instrumentation to operate but also a greater amount of dedicated plumbing to circulate coolant throughout the plant.

However, both types require maintenance to keep the equipment functional.

There are many issues and factors to understand and consider before deciding on a heat transfer solution for your chilling plant.

You must take the help of a trained and experienced person for the final selection, keeping in view all the pros and cons.

5. How to Choose Between Air Cooled Central Chiller and Water Cooled Central Chiller?

Whether it is an Air-Cooled Central Chiller or Water Cooled Central Chiller, an airstream is a must for the process of heat transfer.

The Water Cooled Central Chiller, also known as a cooling tower, needs a humid airflow that is a combination of ambient airflow and water spray.

Whereas, the Air-Cooled Central Chiller just needs a current of ambient air.

Water-Cooled Central Chiller is usually cheap and more efficient as compared to the Air-Cooled one. However, it has the disadvantage of consuming extra water.

When we consider the environmental conditions, Air Cooled Central Chiller is the right fit.

Here are a few more advantages of an Air-Cooled Central Chiller

  • It does not need any cooling towers
  • It offers better environmental stability and less water wastage
  • An Air Cooled Central Chiller has low maintenance costs
  • It is easier to operate and control-tower freezing and tower bypass is absent
  • It helps you avoid the chemical costs.
  • An Air Controlled Central Chiller helps you save on excessive water costs.

Now that both the Air-Cooled Central Chiller and Water Cooled Central Chiller have been described, deciding about the one that is best for you will be easier.

For more convenience, consider the factors given below.

Consider the Operating and Capital Costs 

The Water Cooled Central Chiller appears to be more budget-friendly when you look at the initial cost. However, later, the cost of cooling tower and water bills adds total cost making it a bad choice.

Check the Energy Usage

A Water Cooled Central Chiller is more energy efficient but an Air-Cooled Central Chiller is preferred because it has lesser maintenance costs, installation costs, and water consumption.

An Air Cooled Central Chiller is best for the areas that have low energy costs but are deficient in water availability.

6- What are the Applications of a Central Chiller?

The applications of a Central Chiller include manufacturing units that utilize a Central Chiller to reduce the heat produced by the industrial applications.

Mechanical Industries 

There are a lot of machines running in the mechanical industry at the same time. The heat produced from the running equipment can be dealt with with the help of a Central Chiller.

It will save the equipment from any damage caused by heat.

Brewing industries 

Brewing industries need a specific temperature range to function properly.

This temperature range is maintained by the chilling unit that consumes the extra heat produced by the machines there.

Plastic Industries

Such industries need specific temperatures for molding and cutting. This temperature is provided by installing a Central Chiller.

7- How to Choose the Best Central Chiller for your Application?

The Central Chiller you choose must be suitable for your applications so that it gives maximum benefit to your business.

As each Central Chiller has distinct properties, you can have a look at the following most common ones to help you get the best Central Chiller for your applications.

1: Calculate the Heat Load

To see if your Central Chiller is sufficient to meet the needs of your applications, it is important to calculate the heat load. It is expressed in BTU and you must understand the whole process for calculating the heat load.

2: Check the Flow Rate, Temperature, and the Coolant Type

As water has different properties than oil, the type of coolant for your usage is necessary to be known. Also, the flow rate and the temperature are important so that you can get a better functioning Central Chiller.

3: Decide the Installation Environment

Once you decide on the installation spot for your Central Chiller, you can get an idea about the best size and if you would need any accessories.

If you need it for indoor applications, you must look into the temperature and atmosphere. However, if you want to install your Central Chiller outdoor, you must keep the high and low ambient temperatures in mind.

4: Look at the Performance Curves

Make the best use of the performance curve so that you can have an idea about the required capacity for your applications.

You should also keep the highest expected ambient air temperature and the chilled water supply temperature in mind.

5: Look at the Pump Performance Curves

Make sure that the pump is strong enough to meet the requirements of your application.

Some applications need extra pumping because of long distances and narrow flow paths, so make sure to get a string pump for these.

6: Consider Power characteristics, color, control options, and agency listing 

These requirements are necessary and very helpful in selecting the best Central Chiller for your application, therefore, they must not be ignored.

8- What are the Advantages of Using a Central Chiller for your Applications?

A Central Chiller offers multiple advantages, some of which are listed below.

Safer for Humans

As a Central Chiller does not have any toxic chemicals and hazardous substances, it is safe to be operated around humans and by humans.

Cost-Effective

It might have a high initial cost but the total cost of a Central Chiller compensates for the initial cost. Moreover, it helps you save on utility and water bills and also has a low energy cost.

Sheltered from the Elements

Less exposure of the Central Chiller to the elements like rain, snow, and direct sunlight can lead to the extended life of the components including the condensers and evaporators.

However, the cooling towers are at risk of this exposure.

Quiet Operation

The Central Chiller operates by producing minimum noise and this feature is most beneficial for sensitive environments where silence is preferable to maintain such as hospitals.

9- How to Increase the Working Efficiency of your Central Chiller?

There are several ways in which you can increase the working efficiency of your Central Chiller, making it more effective and useful.

  1. Consider Variable Speed Retrofits

The variable speed drives help to increase the Central Chiller efficiency. Also, most current energy codes need VFDs for these components.

If the condenser water relief is also implemented along with VFDs for these systems, the efficiency can be even greater.

  1. Run Multiple Parallel Devices 

The part load plays an important role in the efficiency of a Central Chiller. Even at peak capacity, efficiency lies between 40 to 60 percent only.

  1. Greater Supply Temperatures

Most of the time, a Central Chiller deals with the water supply in the standard temperature range of 40 to 45 degrees Fahrenheit.

Implementing supply air temperature reset control can save energy in several ways.

In general, the Central Chiller working efficiencies improve approximately 2 percent for every degree that chilled water supply temperature is increased.

  1. Ongoing Maintenance and Preventive Maintenance 

The better you take care of your Central Chiller, the greater will be working efficiency. This is another way to increase the function and performance of your Central Chiller.

Also, a close look at set points, temperature reset, and other simple control sequence changes are usually effective and have a minimal cost.

These factors or methods cannot be implemented on every Central Chiller. However, depending upon the load, temperature range, and financial requirements, you can easily increase the efficiency.

10- How to Install your Central Chiller?

  • To install your Central Chiller, first of all, gather all the loose parts and maintain them. Loose parts include flow sensors, temperature sensors, bulb wells, and isolators, etc.
  • Now mount the Central Chiller on a flat supporting surface. Make sure the surface can bear the weight of your chilling unit.
  • Read the Instructions manual carefully before installing your Central Chiller.
  • Make sure you establish all the power and water connections properly.
  • Make sure you do proper preinstalling piping so that when the Central Chiller arrives, all the pathways are already established and can be easily fitted.
  • Install the valves where required in the evaporator and condenser water boxes. This will help in the maintenance of the components.
  • Now install water flow switches or any other device to control water flow in both the chilled water piping and condenser water piping. Connect these switches to the proper pump starter.
  • Fit the taps for the inlet and outlet of both the condenser and evaporator.
  • Make sure you install vent cocks on both water boxes of your Central Chiller
  • Don’t forget to install supply strainers before the pumps where required.
  • Supply and install refrigerant pressure-relief piping from the pressure-relief valve to

the atmosphere.

  • Always perform a leak test before using your Central Chiller.
  • Evacuate the unit to less than 500 microns (0.5 mm Hg) or according to local code.
  • Charge the system with refrigerant 134a.
  • Check if you have performed all the steps for the install of your Central Chiller and none of the items is missing.
  • Switch on your Central Chiller but make sure you have a trained and qualified technician with you for your better supervision and guidance

11- What are the Main Steps in Using a Central Chiller?

The main steps of using a Central Chiller include the following:

  1. Make sure all of the components of your Central Chiller are complete and in place.
  2. Install a proper water and electricity connection and make sure you have the supply.
  3. It is better to have a trained technician around you while using a Central Chiller.
  4. Perform a leak check before you start using it.
  5. Switch on the power button of your Central Chiller and make sure it does not produce any unusual sound.
  6. Confirm if all the tubes are patent and are not obstructed.
  7. Maintain a continuous supply of water and electricity to the chilling unit and you are good to go.

12- What are the Safety Instructions you must Follow When Using your Central Chiller?

Due to a lack of awareness, people still don’t know how dangerous it can be to deal with a Central Chiller especially when you are not trained.

Inclusion of Safety Controls

Safety Controls of the Central Chiller enable the system to shut down whenever there is a large deviation from the set point.

This deviation of the temperature and pressure can damage the system’s normal construction and work.

Operational Training for Use

It is necessary to have proper knowledge about how to deal with and operate a Central Chiller. Mishandling by an untrained person can harm the person as well as the system.

Therefore, it is necessary to train your staff so that they can operate it properly. And trained staff will be able to also solve any problem in the working of the Central Chiller.

13- How to Maintain your Central Chiller?

Taking care of your Central Chiller unit so that it lasts longer and performs its function efficiently is known as maintenance.

Here are a few points that will help you to know how to maintain your unit.

Check Daily Performance 

By monitoring the performance of your Central Chiller daily, you can get an idea about the effect of the varying factors like fluid levels, pressure, temperature, and flow rates.

This will enable you to avoid any damage before time thus saving on maintenance costs.

Keep the Tubes Clean

To maintain higher working efficiency, it is necessary to keep all the tubes clean and clog-free.

Many impurities like algae, chemicals, mud, and minerals tend to clog up the tubes if not cleaned regularly.

This leads to obstruction of the tubes. With obstructed tubes, the system would not be able to perform at its best.

To Prevent Scaling and Corrosion, Treat the Condenser Water

The water entering the Central Chiller might have any biological growth and chemicals that can lead to corrosion and scaling.

It is necessary to inspect the Chilled water coils regularly at least once a year. This helps you avoid any long-term damage to the operating system.

Low Entering Water Temperature

Another way to increase the working efficiency of your Central Chiller is to reduce the temperature entering the water.

This enables the Central Chiller to exert less effort and therefore, it lasts longer and more effectively.

Keep Chilled Water Flow Rate between 3 to 12-ft per Second

The chilled water flow rate determines the working performance of your Central Chiller. It should be neither too low (laminar flow) nor too high (turbulent flow).

The minimum flow rate should be 3-ft. per second (FPS), and the maximum should be 12 FPS. If the flow rate is too high, it can lead to tube erosion and a lot of noise.

Maintain Adequate Refrigerant Charge

An adequate level of refrigerant is necessary for the proper working of your Central Chiller. Keep checking for any refrigerant leaks so that your system lasts longer.

The low refrigerant level will affect the system’s operation requiring extra effort leading to damage.

Keep a Check on Compressor Oil

Go for a detailed analysis of the lubrication oil of your Central Chiller at least once a year. Replace the oil if it needs to be replaced.

In an advanced Central Chiller, the maintenance cost has been further reduced because there is no lubricating oil as it is magnetic and frictionless.

Keep a Check on Motors and Starters

Look for any worn contacts and all the electrical connections and wiring of your chilling system.

Make sure that the safety and sensor calibrations on the microprocessor are fine. Also, check the insulation to avoid any damage.

14- What are the Most Common Problems and their Solutions for a Central Chiller?

Following are some common problems that you have to deal with when you’re using a Central Chiller.

Low-Pressure Trip 

When the refrigerant level falls, the tubes get affected, water flow becomes low, water filter becomes clogged, and there is mud accumulation in the tubes of the evaporator.

All these problems lead to poor efficiency of the Central Chiller. Therefore, watch for refrigerant level in the first place.

High-Pressure Trip

When the water flow slows down in the water-cooled condenser, the minerals and other contaminants in the water clog the tube.

Similarly, an Air-Cooled Central Chiller gets blocked because of dirt and debris in the air. Therefore, keep your Central Chiller as clean as possible.

Oil Failure Trip 

When there is a low oil level, due to refrigerant leakage or oil pump damage, it can cause further damage to the Central Chiller.

Therefore, take care of the lubricant and keep checking it.

Blown Fuses or Starter Trips 

A short circuit in the motor, compressor, or wires can be the main cause of improper working of your Central Chiller.

So, make sure all the connections are in place and working properly.

FAQ of Central Chiller.

  1. How Many Times should you clean the Tubes of the Condenser of Your Central Chiller? 

To keep the tubes of the condenser of a Central Chiller free of all contaminants, they must be cleaned at least one time a year.

  1. How Long Does a Central Chiller Last? 

A Central Chiller lasts for around 15-20 years if used properly. You can also increase the life of your Central Chiller with proper maintenance.

  1. What is meant by Central Chiller Capacity? 

It refers to the power of a Central Chiller to reduce or consume the heat produced by manufacturing equipment. It is measured in the units BTU/h.

  1. What Refrigerants are used in a Central Chiller? 

A Central Chiller that cools the Industrial processes uses R-410A, R-404A, R-407C, and R-134a and these refrigerants are specific for industrial process refrigeration.

  1. What Do You Mean By the COP Formula of a Central Chiller?

It is the coefficient of performance for the pump of a Central Chiller. Its definition can be explained as the relationship between the power (kW) that is drawn out of the heat pump as cooling or heat, and the power (kW) that is supplied to the compressor.

  1. How to Calculate the Performance Assessment Of a Central Chiller? 

KW/TR is the main performance parameter for a Central Chiller. It is defined as the ratio of power input to the compressor and tons of cooling produced.

  1. Why is Economizer Used in a Central Chiller?

A type of sub-cooler, an economizer uses part of the total refrigerant flow from the condenser. This is further helpful in cooling the rest of the refrigerant flow.

The extra cooling for the compressor can also be provided by the cold gas from the economizer

  1. What is the Cooling Capacity of a Central Chiller? 

It is the measure of the ability of the Central Chiller to remove heat. The SI unit for capacity is Watt but for Central Chiller, it is measured in kilowatt.

  1. Why is a factory test necessary for a Central Chiller?

It is necessary to run a factory test for a Central Chiller so that there is no fault in the working of any of the components of the Chiller.

  1. What is VFD in a Central Chiller?

VFD means variable frequency drive. It helps control the fan speed of a Central Chiller and also helps in increasing efficiency.

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