Cooling systems play a critical role in maintaining stable environmental conditions in modern technology facilities. One important component is the Air Handling Unit with Direct Outside Air Supply or DOAS.
This system manages fresh air intake while maintaining stable temperature and humidity levels. Even small disruptions can impact overall system performance.
Therefore, Air Handling Unit DOAS Maintenance must follow structured procedures and be performed by experienced technicians.
ODG Nusantara Jaya specializes in infrastructure maintenance services across the Jabodetabek region. Our team recently completed Air Handling Unit DOAS maintenance work at a large scale technology facility.
Visual Inspection of Unit and Mechanical System
Technicians performed a comprehensive visual inspection of the DOAS unit. The inspection covered enclosure, ductwork, piping, and structural supports. This process ensures the system remains free from mechanical damage, leaks, or airflow distribution issues. Technicians also inspected evaporator coils and condenser coils for cleanliness and possible leakage. Temperature approach measurements were recorded to verify heat exchange efficiency.
Filter Inspection and Airflow System
Filters play an important role in maintaining air quality within the DOAS system. Technicians inspected the condition of filters and pre filters carefully. Cleaning or replacement occurred when necessary. This step helps maintain stable airflow and prevents contamination inside the cooling system. Technicians also measured temperature and airflow performance to confirm compliance with design specifications.
Electrical System and Control Panel Inspection
Electrical components require careful attention because they directly impact operational stability. Technicians inspected the electrical enclosure including panel cleanliness, VFD condition, and electrical connections. The team cleaned the panel and tightened electrical connections where needed. Supply power measurements were also recorded including voltage, current, and percentage voltage imbalance. Technicians also conducted IR scanning on electrical connections to detect possible overheating risks. These inspections help prevent unexpected system failures.
Motor, Blower, and Mechanical Drive Inspection
Technicians conducted detailed inspections of the motor and blower assembly. The inspection covered fan belts, sheave alignment, and belt tension. Adjustments were made when necessary to maintain stable blower performance. Technicians also inspected the draining system including drain pan and condensate lines. Cleaning procedures were performed to prevent blockage and water leakage.
Sensor Verification and Functional Testing
Sensors play a critical role in automated control systems. Technicians performed one point verification on RH sensors and temperature sensors. This process ensures accurate sensor readings. The team also performed functionality tests on the control panel to verify operational reliability. All operational parameters were recorded in maintenance data logs. Through this process, Air Handling Unit DOAS Maintenance ensures reliable and efficient system performance.
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Email : sales@protk.co.id
