FAQ-Zhangjiagang Yide Machinery Co., Ltd

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  • We offer 1-2 years warranty, global technical support, and provide video guides and manual documents. Spare parts are available long-term.
  • Overseas orders: 15-30 days. Urgent requests can be prioritized.
  • Voltage fluctuation ±10%.
  • All machines are certified by ISO9001, CE and meet UL standards.
  • Yes, our chillers are exported to many countries all over the world including (The United States, Chile, Tanzania, Pakistan, Vietnam, South Korea, etc)
  • We provide multi-language operation manuals, video tutorials and on-site commissioning services.
  • Three days.
  • All products are independently developed and can be customized according to customer requirements.
  • Water Chillers are divided into two categories: air-cooled chillers and water-cooled chillers. The biggest advantage of air-cooled water chiller is that it is easy to install, no need to install cooling tower, generally used for small machines such as 5HP, 10HP. The water-cooled water chillers must be fitted with a cooling tower.
  • 1. Type of refrigerant
    2. Compressor efficiency
    3. Condenser and evaporator design
    4. Cooling water temperature: The lower the cooling water temperature, the better the heat dissipation of the condenser and the higher the COP.
    5. Load rate: the COP of the chiller is higher when running at full load.
    6. Ambient temperature: the higher the ambient temperature, the worse the cooling effect of the condenser and the lower the COP.
    7. Water quality and flow
    8. Equipment maintenance
  • •Choose high-efficiency refrigerants: Such as R134a, R410A, or new environmentally friendly refrigerants.
    •Optimize equipment design: Use high-efficiency compressors, heat exchangers, and variable frequency technology.
    •Control cooling water temperature: Lower the cooling water temperature within a reasonable range.
    •Regular maintenance: Clean heat exchangers and check refrigerant charge levels.
    •Smart control: Use intelligent control systems to optimize operating parameters.
  • R410A and R404A are suitable for high-load systems, while R134a and R407C are suitable for medium-low-temperature systems.
  • Uses air to cool the condenser (via fans) to complete the refrigeration cycle, eliminating the need for a cooling water system.
  • •Air-Cooled Advantages:
    - No cooling tower/water pump needed—simpler installation and maintenance, ideal for water-scarce areas.
    Disadvantages:
    - Lower energy efficiency (lower COP), reduced performance in high temps, louder noise.
    •Water-Cooled Advantages:
    - Higher energy efficiency (higher COP), better for large cooling demands, more stable in varying conditions.
    Disadvantages:
    -Requires cooling tower/water treatment, more complex maintenance, higher water consumption.
  • 1. Cooling water problems: scale clogging, insufficient flow, poor cooling tower heat dissipation.
    2. Insufficient refrigerant/leakage: affecting the heat absorption capacity.
    3. Dirty condenser/evaporator: reduces heat exchange efficiency.
    4. Compressor or expansion valve failure: abnormal refrigeration cycle.
    5. Excessive load or high ambient temperature: exceeds the capacity of the unit.
  • 1. Mechanical Vibration
    - Loose compressor or pump screws, worn bearings → Tighten screws or replace bearings.
    - Pipe resonance → Reinforce brackets or install vibration dampers.
    2. Water Flow Issues
    - Abnormal flow rate (too high/low) or cavitation → Adjust valves, vent air, clean filters.
    - Low water tank level → Refill to normal level.
    3. Fan Noise
    - Bent blades or damaged bearings → Replace blades or bearings.
    4. Improper Installation
    - Insufficient vibration isolation → Add rubber pads or spring dampers.
    Quick Check: Tighten loose parts first, then inspect water flow and fans, and finally check the compressor. If unresolved, contact a professional.
  • 1. Refrigerant Issues
    - Low or excessive refrigerant → Check pressure, fix leaks, or recover excess refrigerant.
    2. Abnormal Water Flow
    - Insufficient cooling/chilled water flow → Clean filters, check pump and valves.
    3. Protection Device Activation
    - Faulty high/low-pressure switch → Test or replace the switch.
    4. Dirty/Condenser or Evaporator
    - Poor heat dissipation or icing → Clean heat exchanger, check fan.
    5. Control System Failure
    - Faulty sensor or contactor → Calibrate or replace components.
    Priority Checks: Water flow, pressure switches, condenser cleanliness.
  • First, check whether the pump motor is running. If it is not running, then measure the three-phase resistance of the motor to determine if the motor is burnt out. If it is burnt out, the pump needs to be replaced.
  • •Optimize the cooling water: increase the flow rate, reduce the water temperature and improve the water quality.
    •Enhance maintenance: regularly clean condenser and evaporator, check refrigerant.
    •Improve the environment: increase ventilation, shade and heat insulation.
    •Adjust the parameters: set the temperature reasonably, use intelligent control.
    •Monitoring and warning: install temperature sensors, check data regularly.
    •Spare equipment: prepare spare cooling system.
  • When checking whether the refrigerant charge of the water-cooled chiller is normal, there are two judgment methods, intuitive and technical.
    An intuitive method is to judge by observing the pressure gauge. The pressure of the refrigerant will change with the set temperature and external ambient temperature. Under normal conditions, the high and low pressures should correspond to these factors. For example, at a specific ambient temperature, when the water chiller temperature is set to a certain value, the pressure displayed on the pressure gauge should also fall within a corresponding range.
    From a technical perspective, judgment needs to be based on the relationship between heat generation and cooling capacity. Simply put, it depends on whether the water chiller's cooling capacity can effectively offset the heat generated by the environment. If the pressure gauge cannot be observed directly, the cooling effect can also be used to judge.
  • This depends on water quality.
  • 1. Regular Water Quality Testing:
    • Regularly test parameters such as pH, hardness, and chloride ion concentration in the cooling water to ensure it meets the required standards.
    • Use water quality testing instruments for monitoring and promptly identify any water quality issues.
    2. Water Treatment:
    • Water Softening: Use water softening equipment to reduce water hardness and minimize scale formation.
    • Chemical Treatment: Add corrosion inhibitors and scale inhibitors to prevent metal corrosion and scale deposition.
    • Disinfection and Algae Control: Regularly add biocides to prevent microbial growth and biofilm formation.
    3. Regular Cleaning:
    • Condenser Cleaning: Regularly clean the condenser to remove scale and dirt, maintaining heat exchange efficiency.
    • Pipeline Cleaning: Regularly clean the cooling water pipelines to prevent clogging and corrosion. 4. Filtration System:
    • Install filters to remove suspended solids and impurities from the water, ensuring clean water quality.
    • Regularly clean or replace filters to maintain effective filtration.
  • •Regular Cleaning:
    - Every 3 Months: Perform a routine cleaning of the condenser and evaporator to remove surface dust and debris.
    - Every 6 Months: Perform a deep cleaning of the condenser and evaporator, including chemical cleaning, to remove internal scale.