About Project

In the pharmaceutical and cosmetic manufacturing sector, Rohto Mentholatum Vietnam is a leading facility with high standards for environmental control and product quality. Due to the specific requirements of the production process, which demands strict temperature control, the Climaveneta Chiller system plays a crucial role in maintaining effective cooling for the entire production line.

To address the issues of refrigerant leakage, oil leaks, and reduced cooling performance, Khoi Minh Trading - Service - Import Export Co., Ltd. has been entrusted to carry out the chiller maintenance, servicing, and repair project at Rohto Mentholatum.

• Client: Rohto Mentholatum Vietnam Co., Ltd.
• Executing Unit: Khoi Minh Trading - Service - Import Export Co., Ltd.
• Equipment: Climaveneta Chiller
• Location: VSIP I Industrial Park, Thuan An, Binh Duong
• Implementation Time: 3 days (from October 11, 2025 – October 13, 2025)
• Objectives: Effectively address refrigerant leaks, oil change, vacuuming, refrigerant charging, and system-wide operational checks.

DETAIL SCROPE OF WORKS

1. Preparation & System Isolation

Prior to commencing repairs, the Khoi Minh technical team will take the following safety measures:

• Complete power disconnection and place warning signs at the control panel.
• Evacuate all refrigerant from the system to prevent fire and explosion risks.
• Pressurize Nitrogen into the piping system to accurately identify the refrigerant leak location at the condenser.

2. Leak Repair & System Leak Testing

• Proceed with sealing the refrigerant leak location using specialized copper welding, ensuring a completely sealed connection.
• After welding, charge with Nitrogen and maintain pressure for 24 hours to verify the system's integrity.
• Regularly monitor pressure to confirm there is no further refrigerant loss.

3. Vacuuming & Refrigerant Charging

• Employing a high-capacity vacuum pump, evacuate all air and moisture from the piping system for 4-6 consecutive hours.
• Recharge with the correct type of refrigerant, as per Climaveneta Chiller specifications.
• Check and replenish compressor oil as needed to ensure stable lubrication.

4. Electrical & System Control Checks

• Check the power supply, measure the operating current of the compressor and condenser fans.
• Inspect relays, contactors, pressure and temperature sensors.
• Ensure signals from the BMS (Building Management System) are functioning correctly without any fault warnings.

5. Test Run & Performance Evaluation

After completing all maintenance tasks, technicians will perform a system test run and record:

• Chilled water inlet/outlet temperatures.
• Compressor suction and discharge pressures.
• Current draw of each compressor for comparison with standard specifications.
  The system will be monitored for 2-3 consecutive operating cycles, ensuring stability and no further refrigerant leaks.

Detailed Work Timeline

Reporting & Technical Documentation

• Handover documentation: Inspection reports, work logs, before-and-after maintenance photos.
  
• Thông số đo đạc sau khi hoàn tất:
  
  • Áp suất hút: 65 psi
  • Áp suất đẩy: 230 psi
  • Nhiệt độ nước ra: 7.2°C
    
  • Dòng điện máy nén: Trong giới hạn tiêu chuẩn
    
• Completion Report: System meets technical requirements, is leak-free, and is suitable for continuous operation.

Results & Benefits After Maintenance

• Chiller operates stably, with no further refrigerant or oil leaks.
• Operating temperatures and pressures are stable and meet manufacturer's specifications.
• Cooling performance is significantly improved, effectively meeting the production needs of the Rohto factory.
• Extended equipment lifespan, minimizing the risk of unexpected breakdowns and reducing maintenance costs.

Post-Maintenance Performance Evaluation & Improvement Recommendations

Following the maintenance process, the Khoi Minh team conducts a comprehensive performance evaluation:

• The system achieved a heat exchange efficiency > 95% compared to its initial value.
• Electricity consumption decreased by approximately 8-10% due to the elimination of refrigerant and oil leaks.
• Recommended additional actions: conduct quarterly inspections, replace refrigerant filters every 12 months, and perform condenser and compressor maintenance twice a year. 

Project Conclusion

The Chiller Maintenance, Servicing, and Repair project at Rohto Mentholatum in 2025, carried out by Khoi Minh, was completed on schedule and met international technical standards.
The entire system has been restored to its original performance, operates stably and safely, and meets the high standards of the pharmaceutical manufacturing industry.

🔧 Are you looking for a professional chiller and HVAC system maintenance unit?
Let Khoi Minh partner with your business in maintaining equipment performance and optimizing operating costs.

📞 Hotline: 0.968.37.38.39
📧 Email: info@khoiminh.com

>>>>>> YOU MIGHT INTERESTED>>>>>>>