Industrial Chiller

Screw chillers are widely used in plastics processing, chemical production, food manufacturing, pharmaceutical facilities and other industrial applications. They are suitable for applications requiring relatively large cooling capacities and stable operation over long production cycles.   However, even a well-designed industrial screw chiller can develop problems after extended operation. High-pressure alarms, low-pressure faults, unstable water temperatures and compressor overheating are among the issues maintenance teams may encounter. Understanding the possible causes helps technicians identify the source of a problem instead of replacing components unnecessarily.   Quick Answer The most common screw chiller problems include high-pressure faults, low-pressure faults, insufficient cooling capacity, abnormal compressor temperatures, water-flow problems and electrical failures. Common causes include poor heat transfer, incorrect refrigerant conditions, restricted water circulation, electrical instability and inadequate maintenance. The recommended approach is to check the alarm history first, verify water flow and operating temperatures, inspect the condenser and evaporator, and then investigate the refrigeration and electrical systems. Refrigerant adjustments and compressor repairs should only be carried out by qualified technicians.   Key Takeaways High-pressure faults often involve condenser heat rejection. Low-pressure faults may result from refrigerant shortages, restricted flow or abnormal operating conditions. Reduced cooling capacity does not automatically mean the compressor is failing. Water quality and stable circulation have a direct effect on chiller performance. Recording operating data before a shutdown can make troubleshooting more efficient.   1. High-Pressure Fault: Check Heat Rejection First A high-pressure alarm occurs when the refrigerant condensing pressure exceeds the permitted operating range. For a water cooled screw chiller, possible causes include insufficient condenser-water flow, excessive cooling-water temperature, a malfunctioning cooling tower or scale buildup inside the condenser. For an air cooled screw chiller, dirty condenser coils, blocked airflow, failed fans or hot air recirculation can create similar problems.   How to fix it: Check condenser cleanliness, water flow or fan operation, depending on the chiller type. For water-cooled units, also inspect cooling-tower performance and condenser-water temperature. If these conditions are normal, a qualified technician should investigate refrigerant charge and other refrigeration-system conditions.   Hengde Insight：When a screw chiller develops a high-pressure alarm, do not start by assuming that the refrigerant charge is incorrect. Ask where the heat is supposed to go and whether the condenser can transfer that heat away effectively. This question can prevent unnecessary refrigerant adjustments.   2. Low-Pressure Fault: Look Beyond Refrigerant Charge Low-pressure protection may be triggered by insufficient refrigerant, a restricted filter-drier, an expansion valve problem, inadequate evaporator load or insufficient chilled-water flow. Very low water temperatures can also contribute to abnormal operating conditions if the system is not designed for them.   How to fix it: Check the chilled-water flow, inlet and outlet temperatures, evaporator condition and relevant refrigerant readings. Inspect for signs of refrigerant leakage before adding refrigerant. If a restriction or expansion valve fault is suspected, have a qualified refrigeration technician investigate it.   Adding refrigerant without identifying the underlying cause may temporarily change operating pressure without resolving the actual problem.   3. Insufficient Cooling Capacity Sometimes a screw chiller continues running but cannot maintain the required process-water temperature. This can happen when the actual heat load exceeds the design capacity, water flow is insufficient, heat exchangers are fouled or the compressor capacity-control system is not operating correctly.   Production changes can also increase cooling demand. A chiller that worked well when a production line was first installed may struggle after additional equipment is connected.   How to fix it: Compare the current cooling load with the original design conditions. Measure water flow and temperature difference, inspect the heat exchangers and verify compressor loading. If production demand has increased significantly, the cooling system may require hydraulic modifications or additional capacity.   Hengde Insight：Before recommending a larger chiller, confirm whether the existing capacity is being used effectively. Poor flow distribution, fouled heat exchangers or incorrect control settings can make a correctly sized machine appear undersized.   4. Compressor Overheating or Frequent Trips Compressor overheating and repeated overload trips should never be ignored. Potential causes include excessive operating pressure, inadequate lubrication, abnormal refrigerant conditions, high discharge temperature, voltage imbalance or mechanical wear.   How to fix it: Record the alarm code, compressor current, operating pressures and temperature readings. Check the power supply and relevant protection devices. Lubricating oil condition, oil level and oil-system operation should be inspected according to the compressor manufacturer's instructions.   Do not repeatedly reset the compressor and return the machine to service without identifying the reason for the trip. Persistent overheating or abnormal mechanical noise requires professional inspection.   5. Water-Flow Problems and Heat Exchanger Fouling Insufficient water flow can reduce heat-transfer performance and trigger protective shutdowns. Common causes include clogged filters, partially closed valves, air trapped in the piping, pump problems or deposits inside the heat exchanger.   How to fix it: Check pump operation, water pressure, valves, filters and flow-switch status. Inspect water quality and arrange appropriate cleaning when scale or deposits are found. The cleaning method must be compatible with the heat exchanger materials and the manufacturer's recommendations.   Maintenance intervals should be based on water quality, operating hours and inspection results rather than following a fixed schedule regardless of actual conditions.   A Practical Troubleshooting Sequence When a screw chiller stops unexpectedly, technicians can follow this sequence: Record the alarm code and operating conditions before resetting the unit. Verify incoming power, phase balance and electrical protection status. Check chilled-water flow, pump operation and water temperatures. Inspect condenser conditions and heat rejection. Review refrigerant pressures and compressor operating data. Inspect lubrication, capacity control and relevant protection devices. Run the machine under normal conditions and confirm that the fault does not recur. Electrical and refrigeration-system work should be performed by qualified personnel. Isolate power before electrical inspection, and never bypass safety protection to keep a machine running.   Hengde Screw Chiller Products and Company Information Nanjing Hengde Electrical Equipment Co., Ltd. has manufactured industrial temperature-control equipment since 2010. Its product range includes air-cooled chillers, water-cooled chillers, screw chillers, scroll chillers, low-temperature chillers and mold temperature controllers.   For example, Hengde's HC-600WD water-cooled screw chiller has a nominal cooling capacity of 600 kW (200 HP), with two semi-hermetic screw compressors. This model illustrates the type of large-capacity cooling equipment used in demanding industrial applications. Actual performance depends on the specified operating conditions.   Hengde operates a 15,000 m² facility with more than 150 employees and provides customized cooling solutions based on cooling capacity, water temperature, ambient conditions, flow requirements, voltage and application needs. When selecting or troubleshooting a screw chiller, matching the system configuration to the actual process requirements is essential for reliable long-term operation.   FAQ Why does my screw chiller keep showing a high-pressure alarm? Common causes include poor condenser heat transfer, high cooling-water temperature, insufficient water flow or restricted airflow. Check the heat-rejection system before investigating refrigerant charge. How often should a screw chiller be maintained? Maintenance frequency depends on operating hours, water quality, environmental conditions and the manufacturer's recommendations. Regularly inspect filters, heat exchangers, electrical connections, operating pressures and compressor data. When should a screw chiller compressor be replaced? A compressor should not be replaced based on a single alarm. Confirm the fault through operating data, electrical tests, lubrication checks and professional mechanical diagnosis before deciding on replacement.   Conclusion Most screw chiller problems become easier to diagnose when technicians follow a systematic process rather than immediately replacing components. Start with the alarm history, verify water circulation and heat rejection, and then investigate refrigeration, lubrication and electrical conditions. Consistent maintenance and accurate operating records can help reduce unexpected shutdowns, protect the compressor and extend the service life of an industrial screw chiller.

Cooling is often treated as an auxiliary system in a coating production line. In practice, it can directly affect equipment protection, process stability, production efficiency and even coating quality.   Whether the line is used for glass coating, decorative coating, vacuum coating, roll-to-roll coating or other industrial coating processes, the cooling system should not simply be selected according to the cooling capacity of the equipment. The designer needs to understand where the heat is generated, where it needs to be removed, and how stable the temperature must remain during continuous production.   So, how should a cooling system for a coating production line be designed?   1. Start with the Actual Heat Sources The first step is to identify all components that generate or absorb heat during the coating process.   Depending on the coating technology, heat may come from heaters, deposition sources, vacuum pumps, motors, chambers, electrodes or other process components. Some parts may operate at high temperatures while nearby components need to remain within a much lower temperature range.   This means that one cooling circuit may not always be the best solution.   For example, a coating machine may require cooling water for the chamber while another circuit is used for a vacuum pump or other heat-generating component. A recent vacuum-coating cooling design published in the patent literature also uses separate cooling paths and temperature sensors to manage different areas of the equipment.   Hengde Insight：A good cooling system is not designed around the question “How many kW does the chiller have?”. It should start with “Which components need to be cooled, at what temperature, and under what production conditions?” Cooling capacity is the result of the design, not the starting point.   2. Define the Required Cooling Temperature Once the heat sources are identified, the next step is to determine the required water temperature.   Different coating machines can have very different temperature requirements. Some components may only require relatively warm cooling water, while others may require accurately controlled chilled water. The designer should therefore confirm: Required cooling-water supply temperature Allowable return-water temperature Temperature tolerance Required cooling capacity Continuous or intermittent heat load Required water flow Ambient temperature Operating hours per day Temperature stability is particularly important when the cooling circuit is connected directly to process equipment. A sudden change in cooling-water temperature can change the thermal conditions of the coating equipment.   For this reason, the cooling system should normally include temperature sensors and a suitable control strategy rather than relying only on manual adjustment. Modern coating equipment can use temperature feedback and flow regulation to coordinate cooling with the process.   3. Protect Components Outside the Main Heating Area One of the most overlooked issues is the temperature of components that are not intended to be heated.   During coating, heat can gradually transfer from the main process area into the chamber structure, seals, bearings, transmission components, electrical components and other surrounding parts.   If these areas become excessively hot, the consequences may include accelerated aging of seals, deformation, lubrication problems or reduced equipment reliability.   Therefore, the cooling system should consider not only the temperature of the coating chamber itself but also the temperature limits of surrounding components.   A specific temperature limit such as 60°C should be treated as an equipment/project design requirement rather than a universal value. The actual allowable temperature should always be confirmed against the component manufacturer's specifications and the coating-machine design.   Hengde Insight：In our view, cooling should not simply remove as much heat as possible. The better goal is to keep each critical component inside its required operating window. Excessive cooling can also create problems such as condensation, thermal stress or unnecessary energy consumption.   4. Make Flow Distribution Part of the Design A chiller with sufficient cooling capacity can still perform poorly if the water distribution is not properly designed. For a coating production line, engineers should consider: Pipe diameter and total pipe length Pressure loss Pump head Flow rate for each cooling circuit Valve arrangement Filters Flow switches Expansion and drainage requirements If several cooling points are connected to the same chiller, balancing the flow between different branches becomes important.   Some advanced coating cooling systems use multiple flow-regulating valves and temperature sensors so that cooling flow can be adjusted according to actual thermal conditions.   This approach can be more effective than simply increasing the pump size.   5. Build Real-Time Monitoring Into the System A production cooling system should give operators enough information to understand what is happening during operation. At minimum, the control system should normally monitor parameters such as: Cooling-water supply temperature Return-water temperature Water flow Pump status Chiller operating status High/low temperature alarms Relevant equipment protection alarms   For larger coating lines, these signals can be integrated into the customer's PLC or central monitoring system.   This makes it easier for operators to identify abnormal temperature changes before they develop into equipment failures.   Hengde Insight：For after-sales troubleshooting, the temperature trend can be more valuable than a single temperature reading. A cooling-water temperature of 25°C may look normal, but if it has increased from 18°C to 25°C within a short period, that trend may indicate a developing cooling problem.   6. Reliability Matters More Than Peak Cooling Capacity Coating production lines are often expected to operate continuously. Therefore, the cooling system should be designed around the actual production schedule rather than only the maximum theoretical heat load.   The chiller, pump, heat exchanger, electrical system and control components should all be selected with the operating environment in mind.   For critical production lines, engineers may also consider standby pumps, independent cooling circuits or other redundancy strategies.   The objective is simple: a cooling system should not become the reason the coating line has to stop.   Hengde's Experience in Coating Line Cooling Hengde provides Industrial Chiller and temperature-control solutions for production equipment requiring stable process cooling. The company designs systems according to the actual cooling load, water temperature, flow rate, ambient conditions, voltage and other application requirements rather than using a one-size-fits-all configuration.   For coating applications, Hengde can provide customized industrial chiller solutions with temperature monitoring, water circulation and protection functions according to the equipment structure and process requirements.   This application-oriented approach is particularly useful when a coating production line has multiple cooling points, different temperature requirements or limited installation space. Instead of selecting a chiller first and adapting the production line afterward, Hengde works from the cooling requirements of the equipment and then develops the appropriate cooling configuration.For coating equipment manufacturers, the most useful Water Chiller and Air Chiller suppliers are not necessarily the one offering the largest cooling capacity. A supplier that understands heat load, flow distribution, temperature stability and equipment integration can make the entire cooling system easier to operate and maintain.

An industrial chiller that keeps shutting down is more than a maintenance inconvenience. For a production line, repeated shutdowns can interrupt production, affect process temperature stability, and increase the risk of equipment damage.   When a customer tells an after-sales engineer, “The chiller runs for a while and then shuts down,” the first reaction should not be to replace the compressor or add refrigerant. The shutdown is usually a protection response. The more important question is: what condition caused the protection to activate?   This article explains the most common reasons why an industrial chiller keeps shutting down and provides a practical troubleshooting approach for technicians and after-sales teams. Quick Answer An industrial chiller may keep shutting down because of: High refrigerant pressure Low refrigerant pressure Insufficient chilled-water flow High ambient temperature or poor ventilation Condenser fouling or cooling-tower problems Compressor overload Three-phase voltage or phase-sequence problems Water temperature or antifreeze protection Temperature sensor or flow-switch faults Incorrect operating conditions or excessive process load The most efficient way to troubleshoot the problem is to identify the actual alarm first, then check the water circuit, electrical supply, condenser conditions and refrigeration system in a logical order.   Key Takeaways A shutdown alarm does not necessarily mean the compressor has failed. Repeatedly resetting the chiller can hide useful troubleshooting information. Water flow should be checked before making assumptions about the refrigeration circuit. Air-cooled and water-cooled chillers require different troubleshooting methods. Voltage, current, water temperature and flow should be checked while the chiller is actually running. The conditions immediately before shutdown are often more useful than the alarm itself.   Hengde Insight：A industrial chiller alarm tells you what protection was triggered, but not necessarily where the original problem started. This distinction is important. For example, a compressor overload may be the final protection action, while the real cause could be abnormal voltage, high condensing pressure or insufficient cooling-water flow.   Table of Contents Quick Answer Key Takeaways Common Reasons Why a Chiller Keeps Shutting Down High-Pressure Protection Low-Pressure Protection Insufficient Water Flow Electrical and Compressor Protection Ambient Temperature and Installation Conditions A Practical Troubleshooting Method Hengde Industrial Chiller Experience About Hengde FAQ Common Reasons Why a Chiller Keeps Shutting Down Industrial chillers are normally equipped with several protection functions. Depending on the model, these can include high-pressure protection, low-pressure protection, overload protection, flow protection, antifreeze protection, phase-loss protection and phase-sequence protection. These protections are not unnecessary interruptions. They are designed to stop the equipment before an abnormal operating condition causes more serious damage. Therefore, when a chiller repeatedly stops, technicians should avoid treating every shutdown as the same problem. For example, a chiller that stops after 5 seconds requires a different investigation from one that operates normally for two hours and then trips during peak production.   1. High-Pressure Protection High-pressure protection is a common reason for industrial chiller shutdowns, particularly during hot weather or when heat rejection is insufficient. For an air-cooled chiller, check: Condenser fins for dust and dirt Condenser fan operation Air inlet and outlet clearance Workshop ventilation Hot air recirculation Ambient temperature For a water-cooled chiller, the investigation should focus on the condenser-water side: Cooling-tower operation Condenser-water temperature Cooling-water flow Condenser fouling Cooling-water pump operation Water valves and piping A water-cooled chiller relies on the cooling-water system to remove heat from the refrigeration cycle. If the cooling tower or condenser-water circulation is not working correctly, the chiller may eventually shut down on high pressure even though the compressor itself is functioning normally.   Hengde Insight：When a high-pressure alarm occurs, don't only ask, “Is the condenser dirty?” A better question is: “Where is the refrigerant heat supposed to go, and is that heat actually being removed?” This approach helps technicians look at the complete heat-rejection system rather than one component.   2. Low-Pressure Protection Low-pressure protection requires a different troubleshooting direction. Possible causes include insufficient refrigerant, refrigerant leakage, low water temperature, restricted refrigerant flow, expansion valve problems, a blocked filter-drier or insufficient evaporator-side flow. If a technician suspects low refrigerant, simply adding refrigerant should not be considered the final solution. If a leak exists, the chiller may operate normally for a short period after refrigerant is added and then develop the same problem again. The better approach is to confirm the operating pressure, inspect the refrigeration circuit and determine whether the refrigerant charge is actually insufficient.   3. Insufficient Water Flow Water circulation problems are sometimes overlooked because technicians naturally focus on the refrigeration system when a chiller stops. However, insufficient water flow can trigger flow protection or create abnormal evaporator conditions. Check the following: Is the circulation pump operating normally? Is the water tank level sufficient? Is the filter blocked? Are valves fully open? Is there air trapped inside the piping? Is the actual flow rate sufficient? Has the process piping been modified recently? It is also useful to record the chilled-water inlet and outlet temperatures. If the temperature difference suddenly becomes abnormal, the problem may be related to water circulation or process load rather than the refrigeration compressor.   4. Electrical and Compressor Protection A compressor overload alarm does not automatically mean that the compressor is damaged. Before considering compressor replacement, check the electrical conditions while the chiller is operating: Three-phase voltage Voltage imbalance Phase loss Phase sequence Running current Electrical terminals Contactor condition Overload protection setting Loose or oxidized electrical terminals can also create intermittent problems. This is especially worth checking on older equipment or machines operating under continuous vibration and high-temperature conditions. If the chiller operates normally for 30 minutes and then trips, technicians should record the current and voltage before the shutdown whenever possible. Checking only after the machine has stopped may miss the abnormal condition.   5. Ambient Temperature and Installation Conditions The installation environment can have a direct effect on chiller performance. For air-cooled industrial chillers, insufficient ventilation or hot-air recirculation can increase condensing temperature and cause high-pressure protection. For example, a chiller may operate normally during the morning but shut down repeatedly during the hottest part of the afternoon. In this situation, ambient temperature should be recorded together with the alarm time. Also check whether the chiller has enough space for air intake and hot-air discharge. Installing several air-cooled chillers in a small enclosed room can create a local high-temperature environment even when the general workshop temperature appears acceptable.   Hengde Insight：The time of the shutdown is useful diagnostic information. If a chiller consistently trips only during peak production or the hottest period of the day, the operating condition may be more important than the chiller's basic design.   A Practical Troubleshooting Method for Technicians When an after-sales engineer receives a report that an industrial chiller “keeps shutting down,” the following sequence can make troubleshooting faster. Check the alarm first Record the alarm code or protection condition before resetting the machine. If possible, take a photo of the controller display. Check the basic conditions Confirm the power supply, water level, pump operation, valves and basic controller status. Check water flow and temperatures Measure chilled-water inlet and outlet temperatures and confirm the actual circulation condition. Check the condenser side For air-cooled units, inspect the condenser and fans. For water-cooled units, check cooling-tower performance, condenser-water temperature and flow. Check electrical parameters Measure voltage and running current under operating conditions. Do not rely only on a measurement taken after the chiller has already stopped. Check the refrigeration circuit Only after the basic conditions have been confirmed should the technician move deeper into refrigerant pressure, expansion components, filter-drier condition and other refrigeration components. This order prevents a common service mistake: replacing an expensive component before confirming whether the actual problem is caused by water flow, power supply or installation conditions.   Hengde Industrial Chiller Experience Hengde manufactures air cooled chillers and water cooled chillers for applications including plastics and rubber, chemical processing, electronics, automotive, die casting, surface treatment, marine and other industrial processes. The company's product range includes scroll, screw and low-temperature chillers. One example of the importance of looking at the complete system is the Hengde HC-20W water cooled chiller. Parameter HC-20W Cooling Capacity 60 kW / 20 HP / 15 ton Compressor 7.5 kW × 2 Pump Power 2.25 kW Cooling Air Flow 20000 m³/h Frozen Water Flow 10.3 / 12.11 m³/h Pump Power 2.25 Kw Maximum Pump Head 20 m Protection High/low pressure, overload, over-temperature, phase loss, phase sequence and other protections These specifications illustrate why chiller troubleshooting should not focus only on compressor power. Pump capacity, water flow, heat exchange and protection settings are all part of reliable operation. The HC-20W is also available with customization options depending on application requirements.    For larger industrial applications, Hengde also manufactures water-cooled screw chillers. The HC-600WD, for example, has a rated cooling capacity of 600 kW / 200 HP / 160 ton and uses two 75 kW semi-hermetic screw compressors. Its published specifications include 155 m³/h cooling-water flow and 110 m³/h chilled-water flow, together with multiple protection functions.    These examples show an important engineering principle: the chiller should be evaluated as a complete cooling system, not simply by its compressor size. About Hengde: Industrial Chiller Manufacturer Nanjing Hengde Electrical Equipment Co., Ltd. was founded in 2010 and specializes in the design, manufacturing, sales and service of industrial refrigeration and temperature-control equipment. The company has a 15,000-square-meter facility and more than 150 experienced employees, with dedicated R&D, manufacturing, testing, sales and service functions.  Hengde manufactures air-cooled chillers, water-cooled chillers, screw chillers, scroll chillers, low-temperature chillers, marine chillers, mold temperature controllers and heating & cooling integrated units.   The company reports ISO9001, CE and SGS certifications and states that its products are supplied to customers in Europe, North America, the Middle East and Southeast Asia. For a new industrial chiller project, Hengde normally needs information such as the application, required cooling capacity, inlet and outlet water temperatures, ambient temperature, voltage, flow and pressure requirements. This information helps engineers select the chiller based on the actual process instead of simply matching horsepower.   FAQ: Industrial Chiller Shutdown Problems 1. Why does my industrial chiller keep shutting down? The most common causes include high or low refrigerant pressure, insufficient water flow, compressor overload, electrical problems, high ambient temperature, condenser problems and protection triggered by abnormal operating conditions.   2. Why does my chiller restart after I reset it? A reset may temporarily clear the protection condition. If the underlying problem remains, the same protection will normally activate again when the abnormal condition returns.   3. Can low water flow cause an industrial chiller to shut down? Yes. Insufficient water flow can activate flow protection and may also cause abnormal evaporator operating conditions. Check the pump, filter, valves, piping and actual flow before assuming a refrigeration fault.   4. Why does my air-cooled chiller shut down on hot days? High ambient temperature, dirty condenser fins, poor ventilation, condenser fan problems or hot-air recirculation can increase condensing temperature and cause high-pressure protection.   5. Why does a water-cooled chiller keep shutting down? Check the cooling tower, condenser-water pump, condenser-water temperature, water flow and condenser cleanliness. The problem may be in the cooling-water system rather than the chiller itself.   6. Should I replace the compressor if the chiller has an overload alarm? Not immediately. Check three-phase voltage, current, phase balance, electrical connections, condenser conditions and operating pressure first. Compressor replacement should be considered only after the cause has been properly confirmed.   Conclusion A chiller that keeps shutting down is usually responding to an abnormal condition rather than simply “breaking down.” The fastest way to solve the problem is to identify the protection, record the operating conditions and work systematically through water flow, heat rejection, electrical supply and refrigeration performance. For technical and after-sales teams, this approach reduces unnecessary component replacement and helps identify whether the problem is actually inside the chiller or somewhere in the surrounding cooling system. The goal is not simply to restart the chiller. The goal is to understand why it stopped.   If you are selecting a new industrial chiller or experiencing repeated shutdowns on an existing cooling system, Hengde can evaluate the application based on cooling capacity, water temperature, flow, pressure, ambient conditions and other project requirements. Looking for the Right Industrial Cooling And Heating Solution? Contact Hengde for an industrial chiller solution tailored to your process.

A three-phase power fault is a common alarm found on industrial chillers, especially three-phase air-cooled and water-cooled chiller systems. When this alarm appears, the chiller may fail to start, the compressor may not run, or the controller may immediately stop the unit for protection.   For technicians and after-sales teams, the important point is that a three-phase power fault does not necessarily mean the chiller itself is defective. The problem may come from the factory power supply, wiring, phase sequence, protection devices, or even changes in the electrical environment around the machine. This guide explains how to troubleshoot the problem from the easiest checks to the more technical ones. What Does a Three-Phase Power Fault Mean? A three-phase chiller normally needs three-phase voltage within the specified operating range. The control system monitors the incoming power before allowing major components such as the compressor to start. If the controller detects conditions such as: Phase loss Incorrect phase sequence Overvoltage Undervoltage Large voltage imbalance Abnormal incoming power Power protection device failure the industrial chiller may display a three-phase power fault or similar alarm.   The exact alarm name varies between chiller manufacturers and controller types, so technicians should always check the electrical diagram and manual for the specific model. Common Causes of Three-Phase Power Faults 1. No or Poor Incoming Power Start with the simplest possibility. Check whether the factory power supply is actually available. Then inspect the main breaker, isolator, terminal connections and incoming cable.   A loose terminal can create intermittent contact. The chiller may work normally one day and suddenly report a power fault the next.   Solution: With the power safely isolated, inspect and tighten electrical connections according to the manufacturer's requirements. Damaged cables, plugs, breakers or terminals should be replaced rather than temporarily repaired.   2. Phase Loss A three-phase chiller can receive power on only two phases if a fuse, breaker, cable or terminal connection fails. For example, a system may measure normal voltage between two phases but show an abnormal reading on the third phase.This is why checking only one voltage measurement is not enough.   Solution: A qualified electrician should measure all three phase-to-phase voltages and compare them with the chiller's specified supply range. If one phase is missing, trace the circuit from the distribution panel to the chiller input.   3. Voltage Imbalance or Unstable Factory Power Even when all three phases are present, the voltage may not be balanced.   Large voltage differences between phases can cause excessive current and overheating in three-phase motors and compressors. Some chillers will therefore stop before the compressor starts.   Solution: Measure the three-phase voltage while the electrical system is under realistic operating conditions. If the voltage fluctuates significantly, investigate the factory power supply, transformer, distribution system, or other heavy electrical loads.   Hengde Insight：Don't check voltage only when the factory is quiet. A power supply that looks normal at 8 a.m. may behave differently when large motors, welding machines, compressors or production equipment start working. For difficult cases, monitoring the voltage during actual production can reveal problems that a single measurement misses.   4. Incorrect Phase Sequence Some three-phase chillers use a phase-sequence protection device. If the incoming phases are connected in the wrong order, the controller may prevent the compressor from starting.This can happen after electrical installation, maintenance or relocation.   Solution: A qualified electrician should verify the phase sequence with the appropriate test instrument. If it is incorrect, the wiring should be corrected only after the power has been isolated and according to the electrical diagram and local electrical requirements.   Do not randomly swap wires while the equipment is energized.   5. Faulty Phase Protection Relay The chiller itself may have normal incoming power, but the phase protection relay or monitoring device may malfunction.A damaged relay can incorrectly detect phase loss, abnormal voltage or phase sequence and prevent the machine from starting.   Solution: Measure the actual incoming voltage first. If the power is normal but the protection relay reports an abnormal condition, the relay and its wiring should be tested by qualified personnel and replaced if necessary.   6. Loose or Oxidized Electrical Terminals This problem deserves more attention than it usually gets. Industrial chillers operate for long periods under vibration and electrical load. Over time, terminal connections can become loose or develop oxidation, increasing electrical resistance.   The result may be heat buildup, unstable contact and intermittent power alarms.   Solution: Inspect the main terminals, contactors, breakers and control-circuit connections during scheduled maintenance. Look for discoloration, overheating marks or damaged insulation.   Hengde Insight：A power fault that appears “randomly” is often more interesting than a fault that appears every time the machine starts. Intermittent alarms should make technicians think about connections, heat and vibration, rather than immediately assuming that the controller has failed.   A Practical Troubleshooting Sequence For after-sales technicians, we recommend following a simple order: Power available → Main breaker → Three-phase voltage → Phase balance → Phase sequence → Terminals → Protection relay → Control transformer → Chiller controller   This prevents unnecessary replacement of expensive components.  For example, replacing a controller before checking the incoming power can solve nothing if the actual problem is a factory breaker or loose terminal. A Representative Hengde After-Sales Case A customer using a Hengde Air Cooled Chiller reported that the machine suddenly displayed a three-phase power fault and could not start. The customer initially suspected that the chiller's electrical system had failed. Hengde's technical team first asked the customer to check the incoming power rather than immediately opening the industrial chiller. The technician guided the customer through several checks. The chiller's three-phase supply was eventually found to be abnormal because of a problem with the factory-side electrical breaker.   After the breaker was repaired and the incoming power returned to normal, the alarm disappeared and the chiller restarted normally. The lesson is simple: the location of an alarm is not always the location of the problem.   For an industrial chiller, the three-phase protection circuit is monitoring the electrical conditions supplied to the machine. Therefore, the factory distribution system should always be included in the troubleshooting process. Advice for Buyers, Technicians and After-Sales Teams When purchasing a three-phase industrial chiller, buyers should confirm the required voltage, phase and frequency before placing the order.   For technicians, record the actual voltage, alarm code and operating conditions before replacing components.   For after-sales teams, ask the customer a few basic questions first: Did the fault appear suddenly or gradually? Are other machines experiencing power problems? Was there recent electrical maintenance? Was the chiller recently moved or rewired? Does the alarm disappear after restarting? Is the incoming three-phase voltage normal? These questions can significantly shorten troubleshooting time. Final Thoughts A three-phase power fault should not automatically be treated as a chiller failure. In many cases, the root cause is somewhere between the factory power supply and the chiller's electrical protection circuit.   The most efficient troubleshooting method is to work from the outside in: check the power first, then the protection devices, and only then investigate the chiller's internal electrical components.   If the cause cannot be confirmed, it is safer to stop the machine and contact the industrial chiller manufacturer or a qualified electrician rather than repeatedly restarting the equipment. This protects both the Industrial Chiller and the people working around it.

An old industrial cooling system does not always need to be completely replaced. In many factories, the real problem is that the cooling equipment has become inefficient after years of operation: compressors consume more electricity, condensers become dirty, pumps work against unnecessary resistance, and temperature control becomes less stable.   For production lines that depend on continuous cooling, upgrading the system can sometimes deliver better results than simply purchasing another oversized chiller.   This case study explains how an old industrial cooling system can be evaluated, upgraded, and optimized for lower energy consumption.   Hengde Insight：Energy saving should not start with “Which new chiller should we buy?” It should start with “Where is the existing system wasting energy?” Finding the biggest source of energy loss first usually leads to a better investment decision. The Problem: An Old Cooling System with Rising Energy Consumption The project involved a factory using chilled water for continuous production-line cooling. The original cooling system had been operating for many years.   The equipment could still provide cooling, but the operating performance had gradually deteriorated. Our technical team noticed several problems: Higher electricity consumption than expected Longer cooling time Increasing temperature fluctuations Frequent maintenance of the refrigeration system Reduced heat-transfer efficiency Pumps operating continuously at relatively high load Difficulties maintaining the required process temperature during periods of high production   Replacing the entire cooling system was considered, but the factory first wanted to understand whether the existing system could be improved.   This is an important point for technicians: an old chiller should not automatically be considered inefficient simply because of its age. Its actual operating condition should be measured before making a replacement decision. Step 1: Measure the Existing System Before upgrading anything, the technical team should record the actual operating data. Useful measurements include: Parameter What to Check Chilled water inlet temperature Actual process return temperature Chilled water outlet temperature Actual supply temperature Water flow rate Whether the system has sufficient circulation Compressor running condition Load and operating stability Condensing temperature Indicates heat-rejection performance Pump pressure Identifies unnecessary resistance Electrical consumption Establishes the energy baseline Production load Prevents comparison under different workloads   The purpose is simple: know where the electricity is going before trying to save it.   For example, if the chiller is operating at only part load while the pump and cooling equipment are running at full capacity, the refrigeration system may not be the only source of energy loss. Step 2: Check Heat Exchangers and Water Circulation One of the most overlooked problems in an old cooling system is the water circuit.   Over time, scaling, dirt, corrosion and deposits can reduce heat-transfer efficiency. Filters can become partially blocked, while old piping may create unnecessary pressure losses.   This can force pumps and refrigeration equipment to work harder than necessary.   Cleaning the heat exchanger, checking filters, inspecting valves and verifying water flow should therefore be part of the upgrade assessment.   Hengde Insight：In industrial cooling, “energy efficiency” is not only a compressor issue. A dirty heat exchanger or poorly designed water circuit can make an otherwise efficient chiller consume more electricity. Step 3: Match Cooling Capacity to the Real Production Load Another common problem is an oversized cooling system. Factories sometimes select a larger chiller because they want additional capacity for future production. However, if the system spends most of its operating time at low load, the actual energy efficiency may not be as good as expected.   A better approach is to examine the production schedule.   If the cooling load changes significantly during the day, technicians should consider: Multiple smaller refrigeration circuits Multi-compressor configurations Capacity control Variable-speed pumps where appropriate Automatic control based on actual cooling demand   The objective is not simply to install a larger industrial chiller. It is to make the cooling capacity follow the production load. Step 4: Upgrade the Cooling Equipment After evaluating the existing system, the factory decided that replacing the aging refrigeration equipment was more practical than continuing with increasingly frequent maintenance.   The upgraded solution was designed around the actual production requirements rather than simply matching the old machine's horsepower. The upgrade focused on: Higher-efficiency refrigeration components Improved heat-transfer performance More suitable chilled-water flow Better control of cooling demand Correctly sized pumps Improved protection and monitoring   For larger industrial applications, a screw chiller can be considered when the cooling load is relatively high and continuous. For smaller or variable-load applications, scroll-type systems can offer a practical alternative.   The correct choice depends on the actual load profile rather than the nameplate capacity alone. The Result: Saving Energy Through the Whole System After upgrading the cooling system, the factory achieved more stable process temperatures and reduced unnecessary operation of the cooling equipment.   The most important improvement was not simply the efficiency of the new chiller. It was the optimization of the entire cooling system.   This included the chiller, pump, heat exchanger, piping, controls and production load.   That is why energy-saving projects should be evaluated as a system rather than as a single machine.   Hengde Insight：A industrial chiller upgrade should be judged by the electricity consumed per unit of production—not only by the industrial chiller's rated efficiency. A machine that consumes slightly more power but provides much better process stability may still deliver a lower overall production cost. What Technicians Should Check Before Replacing an Old Chiller Before recommending a new industrial chiller, technicians can use this simple checklist: 1. Measure actual cooling demand Do not estimate the required capacity from the old chiller's horsepower alone.   2. Record electricity consumption Establish a baseline before the upgrade.   3. Check water flow and pressure Low flow or excessive pressure loss can reduce system efficiency.   4. Inspect heat exchangers Scaling and contamination can seriously affect heat transfer.   5. Review the operating schedule Understand whether the system operates at full load, partial load or highly variable load.   6. Check the control strategy A good control system should respond to the actual production demand.   7. Compare lifecycle cost Consider electricity, maintenance, spare parts and downtime—not only purchase price. Upgrading an old cooling system is not simply about replacing an aging industrial chiller with a new one.   The better approach is to first understand where the existing system loses energy, then redesign the cooling capacity, water circulation and control strategy around the actual production process.   For factories operating industrial cooling systems for many years, this approach can provide a practical path toward lower energy consumption, more stable production temperatures and reduced maintenance costs.   For an experienced industrial chiller manufacturer, the value is not just supplying a new machine. It is helping the technical team determine what should be replaced, what can be retained, and what should be optimized.

When buying an industrial chiller, choosing the right manufacturer can be just as important as choosing the right cooling capacity. For industrial applications, a industrial chiller is not simply a refrigeration machine. It becomes part of the production process and directly affects temperature stability, equipment performance, product quality, and operating costs.   For buyers looking for an OEM industrial chiller manufacturer, the key question is not only “How much does the chiller cost?” but also whether the manufacturer can understand the process, provide the correct configuration, customize the equipment when necessary, and support the project after delivery.   Table of Contents Quick Answer Key Takeaways What Should You Look for in an OEM Industrial Chiller Manufacturer? Industrial Chiller Selection: What Buyers Should Prepare OEM Manufacturer vs Trading Company When Do You Need a Customized Industrial Chiller? Real Experience: Hengde Industrial Chiller Project FAQ Why Choose Hengde?   Quick Answer An experienced OEM industrial chiller manufacturer should be able to do more than assemble standard components. A reliable supplier should help you determine the required cooling capacity, water temperature, flow rate, pump head, condenser type, compressor configuration, power supply, and control requirements.   For standard production lines, an off-the-shelf industrial chiller may be sufficient. However, applications involving high ambient temperatures, low-temperature cooling, corrosive environments, explosion-proof requirements, unusual power supplies, or large flow rates may require a customized solution.   Hengde Insight：In our experience, the cheapest chiller is rarely the cheapest solution over its entire service life. A slightly higher initial investment in the correct configuration can often reduce temperature problems, maintenance work, and unexpected production downtime.   Key Takeaways Cooling capacity should be calculated from the actual process load rather than equipment horsepower alone. The required chilled water temperature and flow rate are critical to chiller selection. Air-cooled chillers are generally easier to install, while water-cooled chillers can be suitable for larger systems when a cooling tower and cooling-water system are available. OEM capability becomes especially important for customized voltage, low-temperature operation, corrosion resistance, explosion-proof requirements, and special control systems. Buyers should evaluate the manufacturer's engineering, testing, spare parts, warranty, and after-sales capabilities—not only the quotation.   What Should You Look for in an OEM Industrial Chiller Manufacturer? Not every company selling industrial chillers is an actual manufacturer. Some companies mainly purchase standard units from other factories and resell them. This can make communication more complicated when the project requires technical modifications.   A genuine OEM manufacturer should normally have its own production, engineering, testing, and quality-control capabilities. It should also be able to explain why a particular compressor, evaporator, condenser, pump, refrigerant, or control configuration is recommended for your application.   For industrial buyers, several areas deserve particular attention: Engineering capability: Can the supplier calculate and recommend the correct configuration? Production capability: Does the company have its own manufacturing facility? Customization: Can voltage, frequency, control systems, water connections, materials, and other requirements be modified? Testing: Is every unit tested before shipment? After-sales support: Can the manufacturer provide troubleshooting assistance, spare parts, and technical support?   Industrial Chiller Selection: What Buyers Should Prepare Before contacting an OEM industrial chiller manufacturer, it is useful to prepare several basic parameters. This makes the quotation more accurate and avoids repeated technical communication. Parameter Why It Matters Cooling capacity Determines the required refrigeration output of the chiller. Water outlet temperature Affects compressor selection and refrigeration system design. Water flow rate Ensures sufficient heat transfer between the chiller and production equipment. Pump head Must match the resistance and distance of the production-line piping. Ambient temperature Important for air-cooled chiller performance and condenser selection. Power supply Voltage, phase, and frequency must match the installation site. Installation environment Special environments may require corrosion-resistant or explosion-proof designs.   Hengde Insight： One common purchasing mistake is to send only the machine model or horsepower to the chiller supplier. For industrial cooling, “20 HP” does not tell the manufacturer enough about the actual process. A good supplier should ask about the process before recommending the model.   OEM Manufacturer vs Trading Company Item OEM Manufacturer Trading Company Technical design Usually handled by an in-house engineering team May depend on an external factory Customization More flexible Depends on the actual manufacturer Production control Direct control of manufacturing Usually indirect Technical communication Direct communication with engineers is possible Information may pass through several parties After-sales support Manufacturer-level technical support Depends on supplier relationship   This does not mean every trading company is unsuitable. A professional trading company can still provide good service. However, for technically demanding industrial chiller projects, direct communication with the manufacturer can reduce misunderstandings and make customization easier.   When Do You Need a Customized Industrial Chiller? Customization does not always mean designing an entirely new chiller. In many projects, relatively small modifications can make the equipment much better suited to the production environment.   Typical requirements may include customized voltage and frequency, special water connections, larger pumps, different temperature ranges, corrosion-resistant materials, special electrical components, PLC control, RS485 communication, explosion-proof electrical configurations, or integration with an existing production line.   For example, Hengde offers different industrial chiller configurations including air-cooled and water-cooled models, scroll and screw chillers, as well as low-temperature units. Its product range covers applications from plastics and rubber to chemicals, electronics, food and beverage, marine, automotive, and surface treatment.   Real Experience: Hengde Industrial Chiller Project Nanjing Hengde Electrical Equipment Co., Ltd. was founded in 2010 and currently operates a 15,000-square-meter manufacturing facility with more than 150 experienced employees. The company provides industrial refrigeration and temperature-control equipment for customers in multiple industries and markets.   Every industrial chiller project has its own challenges. In one of our recent projects, the customer needed a reliable cooling solution for continuous industrial production, but the working conditions were more demanding than a standard chiller application.   The main challenge was to ensure stable cooling performance under long hours of continuous operation while meeting the customer's specific requirements for cooling capacity, water temperature, installation space, and site conditions. A standard off-the-shelf configuration could not fully match the application. Instead of simply recommending a larger chiller, our engineering team reviewed the customer's actual working conditions, including the required cooling temperature, water flow, operating hours, ambient conditions, and available installation space. Based on these details, we adjusted the chiller configuration and selected suitable core components to balance cooling performance, reliability, and operating cost.   Another challenge came during production. The customer's requirements required several details to be checked and confirmed before shipment. Our sales and engineering teams worked closely throughout the manufacturing process, checking the key parameters step by step and communicating with the customer whenever adjustments were needed.   The final industrial chiller was completed, tested, and prepared for shipment after passing the required performance checks. More importantly, the project showed that successful industrial cooling is not simply about choosing a chiller by horsepower. Understanding the customer's actual working conditions and solving problems during the design and production stages are what make a cooling solution reliable in real-world applications.   This is the kind of experience Hengde has built through years of manufacturing industrial chillers. When standard solutions are not enough, we focus on the application, identify the real problem, and work with the customer to develop a practical solution.   FAQ 1. What is an OEM industrial chiller manufacturer? An OEM industrial chiller manufacturer designs and produces industrial cooling equipment and can normally customize equipment according to a customer's technical requirements. 2. Should I choose an air-cooled or water-cooled industrial chiller? Air-cooled chillers are generally easier to install because they do not require a cooling tower. Water-cooled chillers use cooling water to remove heat from the refrigeration system and normally require a cooling tower, cooling-water pump, and related piping. The better choice depends on the plant environment, cooling load, water availability, and operating conditions. 3. Can an industrial chiller be customized? Yes. Depending on the manufacturer, options can include power supply, temperature range, pump capacity, materials, control system, communication functions, and special environmental requirements. 4. How do I choose the correct industrial chiller size? Start with the actual heat load, required water temperature, water flow rate, process operating schedule, and ambient conditions. Chiller horsepower alone is not a reliable sizing method. 5. What should I ask an industrial chiller manufacturer before ordering? Ask about cooling capacity, operating temperature, water flow, pump head, power supply, compressor brand, heat exchangers, refrigerant, testing procedures, warranty, spare parts, and technical support.   Why Choose Hengde as Your OEM Industrial Chiller Manufacturer? Nanjing Hengde Electrical Equipment Co., Ltd. specializes in industrial refrigeration and temperature-control equipment, including scroll chillers, screw chillers, marine chillers, cold & hot integrated chiller and low temperature chillers. The company states that its products are supported by ISO9001, CE, and SGS certifications, with multiple patents and a dedicated R&D, manufacturing, testing, sales, and service structure.    For overseas buyers, the main advantage of working directly with an OEM industrial chiller manufacturer is technical communication. Instead of simply selecting a product from a catalog, Hengde can evaluate the customer's process conditions and recommend a suitable cooling solution.   If you are planning a new production line, replacing an existing chiller, or looking for a customized industrial cooling solution, you can contact Hengde with your required cooling capacity, inlet/outlet water temperature, flow rate, pump head, power supply, and application details.

Choosing the right size of an industrial chiller is not as simple as picking a model based on horsepower. A chiller that is too small may never reach the required water temperature, while a unit that is much larger than necessary can increase the purchase price and operating cost.   For manufacturers, the real question should be: How much heat does my production process actually need to remove? This is the starting point for selecting the right industrial chiller. Cooling Capacity Comes First Industrial chiller capacity is commonly expressed in kW, kcal/h, or tons of refrigeration (TR). The required capacity depends mainly on the amount of heat generated by the equipment and how quickly that heat needs to be removed.   For water-based cooling systems, a basic calculation can be made using water flow and temperature difference: Here, Q represents the approximate cooling load, F is the water flow rate, and ΔT is the temperature difference between the return and supply water.   This calculation provides a useful starting point, but it is not the whole story. Actual industrial chiller sizing also depends on ambient temperature, operating conditions, piping, pump performance, heat losses, and whether the equipment operates continuously.   Don't Choose a Chiller Based Only on Horsepower One of the most common mistakes we see is a customer saying, "I have a 100 HP machine, so I need a 100 HP chiller." There is no direct one-to-one relationship between equipment horsepower and chiller capacity.   Two machines with the same motor power can generate very different amounts of heat. The actual cooling requirement depends on the production process, load, cycle time, material, operating temperature, and how much heat is transferred into the cooling water.   This is particularly important in plastic injection molding, extrusion, chemical processing, and other applications where the cooling load can change significantly during production.   Hengde Insight: Horsepower tells you about the size of the production equipment, not necessarily the size of the cooling load. For chiller selection, process data is usually more valuable than simply knowing the machine's motor power.   Water Temperature Is Just as Important as Cooling Capacity A customer may know that they need a 50 kW chiller, but that information alone is still incomplete. The supplier should also know the required chilled-water temperature.   For example, producing 7°C water is considerably different from supplying 15°C or 20°C cooling water. The lower the target temperature, the more demanding the refrigeration system becomes.   It is also important to know the expected return-water temperature and required water flow rate. These values help the manufacturer determine whether the proposed industrial chiller can provide the required cooling performance under actual operating conditions. Don't Forget the Ambient Temperature For air-cooled industrial chillers, ambient temperature has a direct impact on refrigeration performance. A chiller operating in a factory where the summer temperature reaches 40°C faces very different conditions from the same model operating in a 25°C environment.   This is especially important for customers in hot regions such as Southeast Asia, the Middle East, Africa, and parts of South America.   Hengde Insight:A chiller model should not be judged only by its catalog cooling capacity. The more useful question is: At what ambient temperature and water temperature is that capacity achieved?   This is one reason why two suppliers can quote similar-sized chillers while offering different actual performance.   How Much Safety Margin Do You Need? Some additional capacity is normally sensible because production conditions are rarely perfectly stable. However, bigger is not always better.   A customer may add a very large safety margin because they are worried that the chiller will be insufficient. But an oversized industrial chiller can lead to higher initial costs and inefficient operation, particularly when the actual cooling load is much lower than the machine's rated capacity.   A reasonable reserve should be based on the application rather than an arbitrary percentage.   Hengde Insight: "Buy a bigger chiller just to be safe" is not always good engineering advice. A properly calculated chiller with a reasonable reserve is usually a better investment than a machine that is significantly oversized.   Air-Cooled or Water-Cooled? The cooling method should also be considered when selecting the chiller size. An air-cooled industrial chiller rejects heat directly to the surrounding air. It does not require a cooling tower, which makes installation relatively simple and suitable for many standalone production lines. A water-cooled industrial chiller uses cooling water to remove heat from the condenser. It must the refore work together with a cooling tower, condenser water pump, and associated piping.   For larger cooling loads, water-cooled systems can offer excellent efficiency, but the complete system—including the cooling tower and water treatment—should be considered when calculating the project cost.   For more details, please refer to this article by Hengde: Choosing Between Air Cooled And Water Cooled Chillers: Which One Is Right For You?   What Information Should You Give the Supplier? If you are requesting an industrial chiller quotation, providing the following information will make the selection much more accurate: Equipment or production process to be cooled Required cooling capacity, if known Required inlet and outlet water temperature Water flow rate Ambient temperature Indoor or outdoor installation Power supply: voltage, phase, and frequency Operating hours per day Number of machines requiring cooling   If you don't know the required cooling capacity, that's not necessarily a problem. A professional industrial chiller manufacturer should be able to estimate the load from your process information.   How Hengde Can Help Hengde specializes in industrial chiller solutions for production lines, providing air-cooled and water-cooled chillers for plastic processing, chemical production, electroplating, food processing, lithium battery manufacturing, and other industrial applications.   Our engineering team does not simply select a model according to horsepower. We look at the customer's actual process, required water temperature, flow rate, ambient conditions, and installation environment before recommending a suitable industrial chiller.   For customers who are unsure about the required size, providing the production equipment information and cooling requirements is usually enough for Hengde to make a preliminary assessment.   Final Thoughts There is no universal answer to the question, "What size industrial chiller do I need?" The correct size depends on the actual cooling load, required water temperature, flow rate, ambient conditions, and production process.   For buyers and engineers, the best approach is to give the chiller manufacturer complete process information rather than selecting a model simply by horsepower.   The goal is not to buy the biggest industrial chiller available. It is to choose a industrial chiller that can reliably handle the real cooling load while maintaining stable operation and reasonable energy consumption.

For many manufacturers around the world, China has become one of the leading sources of industrial cooling equipment. Competitive pricing, strong manufacturing capabilities, and flexible customization make Chinese suppliers an attractive option.   However, importing an industrial chiller is very different from buying a standard product online. Cooling capacity, electrical specifications, shipping methods, customs documentation, and after-sales support all influence whether the project runs smoothly.   If you're planning to purchase an industrial chiller from China for the first time, this guide covers the most important things to consider before placing an order.   Start by Choosing the Right Industrial Chiller Before comparing suppliers, make sure you've selected the right type of equipment. Many buyers begin by asking for a quotation based only on cooling capacity. In reality, cooling capacity alone is not enough to determine the correct model.   A professional supplier will usually ask questions such as: 1）How many cooling capacity do you need?  Such as 15kw, 20kw... Or how many m³ of water/solution need to be cooled? 2）What's the orginal temperature ?  3）What's the chilled temperature required ? 4）How long you want to cool down ? Like one houre less or more 5）What's your power supply ?   6）Where is the chiller applied ? 7)  Air Cooled Chiller or Water Cooled Chiller? If you don't know, that's okay; the manufacturer will give you professional advice. 8）How many sets ? The more complete the information you provide, the more accurate the equipment selection will be.   Hengde Insight：The fastest quotation is not always the best quotation. If a supplier recommends a model without asking technical questions, there's a higher chance the equipment won't match your actual application.   Choose Between Air-Cooled Chillers and Water-Cooled Chillers One of the first technical decisions is the cooling method. Air-cooled industrial chillers are easier to install because they do not require cooling towers. They are suitable for factories with limited installation space or locations where water resources are limited.   Water-cooled industrial chillers usually provide higher efficiency for medium and large cooling loads. However, they must operate together with a cooling tower.   The choice should depend on your production conditions rather than equipment price alone. For more：Choosing Between Air Cooled And Water Cooled Chillers: Which One Is Right For You?   Don't Focus Only on the Price Price is naturally important, but it shouldn't be the only factor. Industrial chillers are long-term production equipment. Compressor brands, pump quality, electrical components, control systems, and heat exchangers all influence reliability and maintenance costs.   A lower purchase price may result in higher operating costs over the equipment's lifetime.   Hengde Insight：Many experienced buyers evaluate the total cost of ownership instead of the purchase price alone. Downtime is often far more expensive than the difference between two quotations.   Confirm Technical Specifications Before Production Once you've selected a supplier, carefully confirm all technical details before manufacturing begins.  Items worth checking include: Cooling capacity Refrigerant type, especially EU countries. Electrical specifications Water connections Pump pressure Controller language Communication interface (if required) Machine dimensions Nameplate information   Making changes after production starts is usually much more expensive than confirming everything in advance.   Ask for Factory Testing Before shipment, most professional manufacturers perform a complete factory test.   Requesting photos or videos of the testing process can help confirm that the industrial chiller operates correctly before it leaves the factory. Some buyers also request: Temperature test reports Electrical test reports Nameplate photos Packing photos These documents can reduce misunderstandings after delivery.   Understand Shipping Options Industrial chillers are usually transported by sea because of their size and weight.   Depending on the equipment dimensions, shipments may be arranged as: LCL (Less than Container Load) FCL (Full Container Load) Open Top Container (for oversized equipment) Flat Rack Container (for special projects) Proper export packing is equally important.   Most manufacturers use wooden crates or steel-frame packaging to protect the equipment during international transportation.   Prepare the Necessary Import Documents Before customs clearance, buyers should confirm which documents are required in their country. Common export documents include: Commercial Invoice Packing List Bill of Lading Certificate of Origin (if required) User Manual Electrical Drawings Test Report (if requested)   Different countries may have additional certification requirements, so it's always worth checking local import regulations before placing an order.   Think Beyond Delivery Receiving the equipment is only the beginning. Before purchasing, ask your supplier about: Installation guidance Wiring diagrams Spare parts availability Online technical support Warranty policy   A supplier that continues to provide technical assistance after delivery is often more valuable than one offering the lowest quotation.   Hengde Insight：The quality of after-sales support is difficult to evaluate before purchase—but it becomes one of the most important factors after the equipment arrives.   Build a Long-Term Partnership Many factories import industrial chillers more than once. As production expands, customers often require additional chillers, spare parts, or customized cooling systems.   Working with a reliable manufacturer who understands your production process can simplify future projects and reduce communication time.   Hengde Insight：The best supplier isn't necessarily the one with the lowest price. It's the one who already understands your factory before you place your second order.   How Hengde Can Help With more than 20 years of manufacturing experience, Hengde supplies industrial chillers to customers in plastics processing, chemical manufacturing, electroplating, food processing, marine engineering, and lithium battery production worldwide.   We offer air cooled chillers, water cooled chillers, screw chillers, scroll chillers, and customized process cooling solutions tailored to each customer's production requirements.   From equipment selection and engineering support to  factory testing, export packing, and after-sales service, Hengde works closely with customers throughout the entire importing process, making it easier to purchase reliable industrial chillers from China with confidence.

When planning a cooling system for a manufacturing plant, one question comes up repeatedly: "Should I install an industrial chiller or a cooling tower?" Although both are designed to remove heat from industrial processes, they serve very different purposes. Many first-time buyers assume they are interchangeable because both deal with circulating water, but that's one of the most common misunderstandings in industrial cooling.   The right choice depends on what your production line actually needs. More importantly, understanding how these two systems work together can help you avoid costly design mistakes and improve long-term operating efficiency.   They Remove Heat in Different Ways An Industrial Chiller is an active refrigeration system. It uses a compressor, evaporator, condenser and expansion valve to produce chilled water at a controlled temperature. That chilled water is then circulated through production equipment such as injection molds, chemical reactors, laser machines, electroplating lines or lithium battery manufacturing equipment.   A Cooling Tower works differently. It does not create chilled water. Instead, it removes heat from circulating water by allowing a small amount of water to evaporate into the atmosphere. Because of this principle, the outlet water temperature of a cooling tower is always influenced by the outdoor wet-bulb temperature.   Simply put: An Industrial Chiller produces chilled water. A Cooling Tower removes heat from warm water. Although they both contribute to industrial cooling, they perform completely different functions.   A Water-Cooled Chiller Always Works with a Cooling Tower One point that often causes confusion is the difference between air-cooled chillers and water-cooled chillers. An air-cooled industrial chiller is a self-contained unit. It dissipates heat through its condenser using ambient air, so it does not require a cooling tower. A water-cooled industrial chiller, however, cannot operate independently. It must work together with a cooling tower, condenser water pump, and the associated piping system.   In this configuration: The industrial chiller provides chilled water for the production equipment.  The cooling tower removes the condenser heat generated by the chiller. Together they form one complete cooling system.   Many customers compare water-cooled chillers directly with air-cooled chillers based only on the chiller itself. In reality, a water-cooled system should always be evaluated as a complete engineering solution rather than as a single piece of equipment.   Hengde Original Insight: A water-cooled chiller is not simply another type of chiller—it is part of an integrated cooling system. When planning a project, manufacturers should consider the cooling tower, pumps, piping, installation space, and water treatment together instead of evaluating only the chiller itself.   Stable Temperature Matters More Than Cooling Capacity When selecting cooling equipment, many buyers pay most attention to cooling capacity. However, in real manufacturing environments, temperature stability is often more important than maximum cooling capacity.   For example, plastic injection molding requires consistent mold temperatures to reduce dimensional variation and improve product quality. Chemical reactors depend on stable cooling to maintain reaction conditions, while lithium battery production demands precise temperature control during coating and drying processes.   A cooling tower can only cool water close to the ambient wet-bulb temperature, which changes with weather conditions.   An industrial chiller, however, can continuously maintain a preset water temperature regardless of seasonal temperature changes.   Hengde Original Insight：Manufacturers often compare cooling capacity first, but experienced engineers usually compare temperature stability. A stable cooling process generally produces fewer defects than a system with greater capacity but fluctuating temperatures.   They Are Often Partners Rather Than Competitors Many comparison articles present industrial chillers and cooling towers as competing products. In practice, this isn't always true. Large manufacturing facilities frequently install both systems. For example, a water-cooled screw chiller used in a plastics factory may rely on a cooling tower to remove condenser heat while simultaneously providing chilled water for injection molding machines.   Instead of replacing each other, they perform different jobs within the same cooling system.   Hengde Original Insight: In many industrial projects, the question isn't "Industrial chiller or cooling tower?" The better question is "Does my cooling system require both?"   Installation and Maintenance Installation requirements vary depending on the cooling method. Air-cooled industrial chillers are relatively simple to install because no cooling tower is required. This makes them suitable for factories with limited installation space or locations where water resources are limited.   Water-cooled chillers require additional equipment, including cooling towers, condenser water pumps, and circulating piping. Although installation is more complex, they generally provide higher efficiency for medium and large industrial cooling loads.   Cooling towers also require regular maintenance. Water treatment, scale prevention, corrosion control, and periodic cleaning are all essential for maintaining long-term cooling performance.   Ignoring water quality may reduce the efficiency of both the cooling tower and the industrial chiller connected to it.   Which System Is Right for Your Factory? The answer depends on your production requirements.If your production line requires precise temperature control, low-temperature cooling, or year-round stable operation, an Industrial Chiller is the preferred solution. If the objective is to reject condenser heat or cool circulating water close to ambient temperature in a central cooling system, a Cooling Tower is an essential component.   For many manufacturing facilities, especially those using water-cooled chillers, the best solution is a combination of both.   Hengde Original Insight:The biggest energy loss we see in industrial cooling is rarely caused by the chiller itself. More often, it comes from choosing the wrong cooling system or selecting equipment that doesn't match the actual production process.   How Hengde Can Help Hengde specializes in designing and manufacturing Industrial Chillers for production lines across a wide range of industries, including plastic injection molding, chemical processing, electroplating, laser equipment, food processing, and lithium battery manufacturing.   Our product range includes air-cooled chillers, water-cooled chillers, and customized industrial cooling systems. For customers requiring large cooling capacities, we also provide complete water-cooled chiller solutions designed to operate seamlessly with cooling towers, pumps, and auxiliary equipment.   Rather than simply recommending a standard model, our engineering team evaluates your cooling capacity, process temperature, installation conditions, factory layout, and future expansion plans to deliver the most suitable cooling solution for your production line.

When customers contact Hengde about an industrial chiller, one of the most common questions is surprisingly simple: "Should I choose a screw chiller or a scroll chiller?" There isn't a universal answer. Both technologies are widely used in industrial cooling, and both can deliver reliable performance when selected for the right application. The real challenge is understanding how they behave under different production conditions rather than simply comparing specifications.   After supporting customers in plastics, chemical processing, pharmaceutical manufacturing, food production, and metal processing, we've found that the wrong decision usually isn't buying the "less powerful" machine—it's choosing a chiller that doesn't match the way the factory actually operates. Capacity Is Only Part of the Story Most buyers begin by comparing cooling capacity. While cooling capacity is obviously important, compressor type affects much more than how many kilowatts a chiller can produce. Scroll chillers are typically selected for small to medium cooling loads. Their compact design, fewer moving parts, and relatively simple structure make them a popular choice for injection molding machines, laser equipment, packaging lines, and laboratory cooling. Screw chillers, on the other hand, are commonly installed where cooling demand is continuous and significantly larger. Chemical plants, central cooling systems, large extrusion lines, and process cooling applications often benefit from the stability that screw compressors provide.   Capacity determines whether the machine can cool your process. Compressor type determines how efficiently it will continue doing that year after year. Load Stability Changes Everything This is one factor many first-time buyers overlook. Some factories operate twenty-four hours a day with nearly constant cooling demand. Others experience frequent production changes throughout the shift. Scroll chillers generally perform very well when cooling loads change frequently. Starting and stopping individual compressors is relatively straightforward, making them suitable for production lines that don't always run at full capacity. Screw chillers usually show their advantages when operating under stable, continuous loads. Instead of repeatedly cycling on and off, they maintain consistent performance over long operating periods.   Hengde Unique Insight：Many buyers compare maximum cooling capacity, but experienced engineers often compare how stable the factory's cooling demand is throughout the day. That single factor often has a greater influence on compressor selection than peak capacity. Maintenance Looks Different People often assume larger equipment automatically requires more maintenance.In reality, maintenance depends more on operating conditions than physical size. Scroll chillers contain fewer mechanical components, making routine servicing relatively straightforward. For facilities without dedicated maintenance personnel, this simplicity is often appreciated. Screw chillers include additional systems such as oil management and capacity control. Although maintenance is more specialized, properly maintained screw compressors are designed for long operating hours and continuous industrial service.   Neither option is "maintenance-free." The maintenance simply takes different forms.  Energy Efficiency Depends on How You Use It Many comparison articles simply state that one compressor is more energy-efficient than the other.That isn't entirely accurate. A scroll chiller operating close to its design capacity may consume less electricity than an oversized screw chiller. Likewise, a screw chiller running continuously under heavy industrial loads often delivers better long-term efficiency than several smaller scroll compressors attempting to handle the same workload.   Hengde Unique Insight：There isn't a universally "more efficient" compressor. Efficiency depends on whether the compressor spends most of its time operating in the range it was designed for. Think About Future Expansion Production rarely stays exactly the same. A factory may introduce additional production lines, increase operating hours, or expand cooling demand over the next several years. When selecting an industrial chiller, it is worth considering future requirements rather than today's production volume alone. Some manufacturers intentionally leave moderate cooling capacity for expansion, while others install a central cooling system that allows additional chillers to be integrated later. Planning ahead can prevent expensive equipment replacement as production grows. Noise Isn't Just About the Compressor Customers occasionally ask whether screw chillers are noisier than scroll chillers. The answer is more complicated.   Noise is influenced by fan design, piping layout, installation quality, vibration isolation, compressor loading, and even the machine room itself. A well-installed screw chiller may operate more quietly than a poorly installed scroll chiller.   Hengde Unique Insight: When customers complain about chiller noise, the compressor is not always the main source. In many industrial projects, vibration transmission through foundations or piping contributes more noise than the compressor itself. Which One Is Right for Your Factory? Rather than asking which compressor is better, a better question is: "Which compressor best matches my production process?"   Generally speaking:  Scroll chillers are well suited for small and medium cooling capacities, flexible production schedules, and installations where simple maintenance is preferred. Screw chillers are often the better choice for continuous industrial production, central cooling systems, and applications requiring stable, high-capacity cooling.   Neither technology replaces the other. They simply solve different cooling challenges.   Hengde Unique Insight：Factories rarely regret buying a higher-quality chiller. More often, they regret purchasing equipment that was correctly sized on paper but poorly matched to their production process. How Hengde Can Help Hengde has specialized in manufacturing industrial chillers for more than 20 years, providing reliable cooling solutions for plastics processing, chemical reactors, pharmaceutical production, food manufacturing, laser equipment, and many other industrial applications.   Our product range includes both scroll chillers and screw chillers, available in air-cooled and water-cooled configurations. Instead of recommending the same model to every customer, our engineering team evaluates cooling capacity, operating temperature, production schedule, installation conditions, and future expansion plans before suggesting the most suitable solution.   Whether you're building a new production line or upgrading an existing cooling system, Hengde can help you select an industrial chiller that delivers stable performance, energy efficiency, and long-term reliability.   Choose Hengde，Choose Perfect Industrial Chiller！

Glycol chillers are the core cooling equipment for modern brewery and food processing production lines. Unlike conventional water chillers, they use propylene glycol aqueous solution as the heat exchange medium, featuring low-temperature resistance, anti-freezing and stable heat dissipation. In beer fermentation, food cold processing and ingredient constant-temperature storage scenarios, precise and stable cooling directly determines product taste, shelf life and production qualification rate. Many factory owners only focus on chiller power and price during selection, ignoring industry-specific sanitary standards, peak cooling load and long-term energy consumption, which leads to unstable production and high operating costs. This article summarizes practical, industry-targeted selection rules to help enterprises pick cost-effective and compliant glycol chillers.   Match Cooling Capacity with Actual Peak Load English: Cooling capacity matching is the primary principle for glycol chiller selection. Most manufacturers label rated cooling capacity under standard working conditions, while brewery and food production have obvious peak load characteristics. For breweries, peak heat load comes from exothermic yeast fermentation and wort rapid cooling; for food factories, it focuses on batch quick freezing and continuous processing cooling . Professional industry sizing formula: Required chiller capacity = crash cooling load + fermentation/processing heat load + pipeline loss + 1.3–1.5 safety margin . Blindly choosing low-power models will cause insufficient cooling during peak production, while excessive power leads to long-term idle energy waste. Different from general industrial chillers, food and brewery equipment must reserve enough margin for seasonal temperature changes and subsequent production expansion.   Prioritize Food-grade Sanitary Configuration Food and brewery industries have strict hygiene certification requirements that ordinary industrial glycol chillers cannot meet. Qualified industry-specific chillers must adopt food-grade propylene glycol, 3-A sanitary fittings and CIP cleanable pipeline structures to avoid medium contamination affecting food safety . In addition, the internal pipeline and heat exchanger need anti-corrosion and anti-scale treatment, and the unit supports precise temperature control within ±0.5°F, which is crucial for stabilizing beer fermentation flavor and ensuring food processing consistency. It is worth noting that ethylene glycol is prohibited in food and beverage production scenarios due to toxicity, and only non-toxic propylene glycol is allowed as the circulating medium .   Select Air-cooled / Water-cooled Type Based on Plant Environment The choice between air-cooled and water-cooled glycol chillers depends on the factory’s site conditions and production scale. Air cooled chillers require no cooling water tower, feature simple installation and low maintenance cost, and are suitable for small and medium breweries, food processing workshops with limited space and scattered equipment. Water cooled chillers have higher cooling efficiency and more stable operation, ideal for large-scale continuous production, high-temperature and enclosed factory environments, and can effectively reduce unit energy consumption under long-term full-load operation . Most food and beverage enterprises with stable large production capacity prefer water-cooled models, while small craft breweries and intermittent processing workshops are more suitable for air-cooled portable chillers.   Focus on Long-term Energy Efficiency & Intelligent Control Most buyers only compare upfront purchase prices while ignoring operating costs, which is a typical selection misunderstanding. Brewery and food production requires long-term continuous cooling, so chiller energy efficiency ratio (EER) directly determines annual power consumption. In addition, modern production needs intelligent monitoring functions: real-time temperature adjustment, remote data viewing, and fault automatic alarm. Intelligent glycol chillers can dynamically adjust cooling capacity according to production load changes, avoiding ineffective energy consumption and realizing precise energy saving. For enterprises pursuing refined production, this configuration is far more valuable than low purchase cost.   Choosing a suitable glycol chiller for brewery and food industry is not about selecting the cheapest or most powerful model, but about realizing matching cooling capacity, sanitary compliance, environmental adaptation and energy-saving stability. By focusing on peak load matching, food-grade safety configuration, environment-based model selection and intelligent energy efficiency optimization, enterprises can avoid hidden risks such as unqualified product quality and excessive energy consumption, and create stable and reliable cooling support for industrial production.   Practical Industry Case: Hengde Glycol Chiller Application As a professional manufacturer specializing in industrial temperature control equipment, Hengde has rich practical experience in customized glycol chiller solutions for global brewery and food processing enterprises, with over 500 successful brewery cooling project cases worldwide . A typical cooperation case is a medium-sized craft brewery in East China, which previously faced unstable fermentation temperature and inconsistent beer flavor due to mismatched chiller cooling load and ordinary non-food-grade cooling equipment. To solve these pain points, Hengde customized a food-grade air-cooled glycol chiller set according to the factory’s peak fermentation heat load, limited workshop space and long-term energy-saving demands. The equipment adopts pure food-grade propylene glycol medium and full 3-A sanitary pipelines, with a temperature control accuracy of ±0.5°F, completely meeting food safety production standards. After one year of stable operation, the brewery’s product qualification rate increased by 98%, seasonal temperature fluctuation failure disappeared, and the intelligent load adjustment function reduced annual power consumption by nearly 15%. In addition, Hengde water-cooled glycol chillers have been widely applied in large-scale food quick-freezing and ingredient constant-temperature processing projects, solving the problems of high energy consumption and unstable cooling of traditional chillers in continuous high-load production .   Choose Hengde, Choose Glycol Chiller!

When people hear the words “cooling equipment,” they often think that water chillers and air conditioners work in the same way. In fact, they both use refrigeration cycles involving compressors, condensers, evaporators, and refrigerants. However, their design purposes, cooling methods, and application scenarios are very different.   Different Purposes: Cooling Processes vs Cooling People The biggest difference is what they are designed to cool. Air conditioners are mainly designed to control the temperature and humidity of indoor spaces, creating a comfortable environment for people. A typical office, home, or shopping mall uses an air conditioning system to lower the indoor temperature by directly cooling the surrounding air.   A water chiller, on the other hand, is mainly designed for industrial processes. It removes heat from machines, molds, reactors, lasers, food processing equipment, and other production systems by circulating chilled water or other cooling fluids.   Hengde Unique Insight：A factory may still need a powerful industrial chiller even when the workshop itself feels cool. The purpose of a chiller is not to make people comfortable, but to keep the production process within a stable temperature range.   Cooling Capacity and Continuous Operation Air conditioners are usually designed based on human comfort requirements and normal daily operation. They often work with changing indoor temperatures and may stop or reduce capacity after reaching the target temperature.   Industrial water chillers are designed to handle large and continuous heat loads. In many factories, chillers operate 24 hours a day, maintaining accurate water temperatures to ensure product quality and stable production.   Hengde Unique Insight: In industrial applications, temperature fluctuations of just a few degrees may affect product quality. For example, in injection molding, unstable mold temperatures can cause dimensional deviations, surface defects, and longer production cycles.   Installation and System Design Differences An air conditioner usually forms an independent cooling system for a room. Installation is relatively simple, and its main goal is to regulate air temperature.   Industrial chillers are often integrated into production lines. They may be connected with molds, extrusion machines, reactors, laser machines, or other equipment through pipelines to create a closed-loop cooling system.   Hengde Unique Insight: Many first-time users try to compare industrial chillers with large commercial air conditioners because both have compressors and fans. However, the key difference is not the appearance of the equipment but the stability, water temperature control accuracy, and ability to handle process heat.   Which One Should You Choose? If your goal is to improve the comfort of a workspace, an air conditioner is the correct choice. If your production equipment generates heat and requires stable temperature control, an industrial water chiller is the professional solution. Choosing the wrong cooling system may not only reduce efficiency but also affect product quality and increase operating costs.   How Hengde Can Help Hengde specializes in the design and manufacturing of industrial water chillers with more than 20 years of experience in temperature control technology. Our air cooled chillers and water cooled chillers are widely applied in injection molding, extrusion, chemical processing, laser equipment, food production, and many other industrial production lines. We provide customized cooling solutions based on customers’ cooling capacity, temperature requirements, installation environment, and process conditions.Unlike air conditioners designed for human comfort, Hengde industrial chillers are engineered to maintain precise and reliable temperature control for industrial processes, helping customers improve production efficiency and product consistency.