About Project

In modern manufacturing facilities, HVAC systems are critical for controlling temperature, humidity, and air quality, ensuring a stable environment and continuous production. At Fuji Seal Vietnam Co., Ltd. – a leading global packaging manufacturer – maintaining stable HVAC operation is an essential requirement.

To meet this demand, from 2019 to 2023, Khoi Minh Import Export Trading Service Co., Ltd. implemented the Fuji Seal HVAC maintenance projectl. The scope included Chiller maintenance, air conditioning systems, AHUs, and FCUs, performed through quarterly periodic inspections and annual overhauls.

• Project Timeline:
  • 2019: Commenced periodic maintenance for Chillers, cooling towers, AHUs, and FCUs.
  • 2020: Replaced Chiller evaporators and conducted a comprehensive system inspection.
  • 2021: Maintenance contract from January 1 to December 31, executing 4 quarterly maintenance cycles.
  • 2022: Contract extension to May 18, 2023, with enhanced preventive maintenance.
  • 2023: Final inspection, performance evaluation, and maintenance handover. 

Periodic maintenance ensures stable HVAC operation, minimizes unscheduled downtime, and optimizes energy efficiency – critical factors in industrial production.

DETAIL SCROPE OF WORKS

Chiller Maintenance

The Chiller maintenance procedure includes inspecting overall operations and recording performance parameters; checking oil levels, oil color, and operating temperatures to ensure compressor oil meets standards; and calibrating expansion valves as necessary to maintain stable refrigerant flow.

• Frequency: Quarterly inspections + annual overhaul.
• Cleaning: Y-strainers, check valves, bypass valves, temperature and pressure sensors.
• Oil & Refrigerant: Oil level checks, leak detection, filter-drier replacement, and refrigerant charging if required.
• Electrical & Controls: Measuring compressor amperage, insulation resistance testing, tightening electrical connections, and sensor calibration.
• Mechanical & Operation: Vibration and noise level measurements, expansion valve inspection, and monitoring discharge temperatures.
• Completion: Test run, logging operational data, and submitting technical reports to the client.

Chiller Maintenance

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AHU (Air Handling Unit) Maintenance

To maintain stable performance and ensure air quality, HVAC system maintenance at Fuji Seal focuses specifically on AHU (Air Handling Unit) maintenance. The AHU maintenance procedure is meticulously implemented by a specialized technical team, ensuring durable operation and energy efficiency.

• Frequency: 3–4 times/year
• Scope of Work:
  • Cleaning coils with specialized chemicals.
  • Cleaning and replacing air filters.
  • Inspecting fan motors, belts, and bearings; measuring motor amperage for predictive failure analysis.
  • Checking dampers, bypass valves, and pipe insulation.

AHU Maintenance

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FCU (Fan Coil Unit) Maintenance

To ensure the entire HVAC system at Fuji Seal operates stably and delivers optimal cooling performance, FCU (Fan Coil Unit) maintenance must be performed regularly 3–4 times per year. This is a critical task for enhancing air quality, maintaining equipment lifespan, and minimizing long-term operating costs.

• Frequency: 3–4 times/year
• Scope of Work:
  • Cleaning coils and air filters.
  • Tightening electrical connections, inspecting valves, and measuring fan current.
  • Adjusting system balance in case of vibration.

Unitary Air Conditioner Maintenance

To ensure a cool, safe working environment and energy efficiency, HVAC maintenance at Fuji Seal includes unitary air conditioner maintenance. This comprehensive maintenance process extends equipment lifespan and minimizes unscheduled breakdowns.

• Frequency: 2–3 times/year
• Scope of Work:
  • Cleaning condensing units, evaporator units, contactors, and sensors.
  • Checking refrigerant levels and recharging if necessary.
  • Measuring voltage, amperage, and protection relays.
  • Tightening terminals, checking vibration, and recommending repairs.

HVAC Maintenance - Unitary Air Conditioner Maintenance

Control System (BMS) Inspection

• Check sensor signals and calibrate alarms.
• Ensure stable remote control functionality.

Annual Project Timeline

Reporting & Technical Documentation

• Detailed Reports: Record equipment status, measured parameters, and before/after photos.
• Annual Summary Records: Pre- and post-maintenance performance comparison and retrofit recommendations.

Post-Maintenance Results and Benefits

Periodic HVAC maintenance at Fuji Seal not only ensures production stability but also delivers long-term benefits to the enterprise. Key results after each maintenance cycle include:

1. Stable Operation, No Production Interruption

Post-maintenance, the entire HVAC system at Fuji Seal operates smoothly with minimized unexpected breakdowns. This maintains continuous production lines, ensuring schedules and product quality.

2. Minimized Refrigerant Leaks – Cost Savings

Periodic maintenance enables early detection and rectification of refrigerant leaks, reducing major repair costs and preventing energy loss. This serves as an effective operational cost-saving solution for the business.

3. Extended Equipment Lifespan, Reduced Energy Consumption

Regular cleaning, inspection, and system adjustments enhance the lifespan of HVAC equipment. Simultaneously, optimized system operation reduces energy consumption, contributing to power savings and environmental protection.

4. Professional Technical Reporting After Each Maintenance Cycle

Following each maintenance interval, Fuji Seal receives a detailed and transparent technical report on equipment status. This report enables the enterprise to easily track maintenance history, manage assets, and proactively plan subsequent maintenance schedules.

Project Conclusion

The 2019–2023 Fuji Seal HVAC maintenance project was implemented systematically and on schedule, optimizing operational performance, reducing costs, and enhancing overall system reliability. This clearly demonstrates Khoi Minh’s capability in executing HVAC maintenance projects for large-scale manufacturing plants.

🔧 🔧 Looking for professional HVAC maintenance solutions?
Let Khoi Minh partner with you to maintain equipment performance and optimize operating costs.

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