Shah Alam | March 10, 2026 — EKG M&E Sdn Bhd has successfully completed a critical maintenance and chemical descaling operation on the Water-Cooled Package Units (WCPU) at CNI Enterprise. This specialized intervention was designed to eliminate mineral calcification and restore the heat exchange performance of the building's central cooling infrastructure.
Scope of Work: Chemical Descaling, Tube Cleaning, and System Neutralization
Over time, the condenser coils in a WCPU accumulate mineral deposits from the cooling water loop. This "scaling" acts as an insulator, significantly reducing the system's ability to reject heat. At CNI Enterprise, the WCPU was showing signs of high-head pressure and increased energy consumption, indicating that the heat exchanger was fouled with calcium and magnesium carbonate buildup.
Our technicians implemented a multi-stage chemical restoration process:
Closed-Loop Chemical Circulation: We utilized a specialized descaling pump to circulate an inhibited acidic solution through the WCPU’s shell-and-tube condenser. This chemical reaction breaks down the hard mineral scale into a soluble form without damaging the copper tubes.
Mechanical Tube Brushing: Following the chemical soak, our team performed mechanical brushing of the condenser tubes to ensure any remaining softened debris was completely flushed out.
Neutralization & Passivation: To ensure the longevity of the equipment, we neutralized the acidic solution and passivated the metal surfaces. This prevents "flash rusting" and creates a protective layer on the internal copper surfaces to slow down future scaling.
Performance Verification: After the cleaning, the system was refilled and tested. We monitored the Approach Temperature (the difference between the water leaving the condenser and the refrigerant temperature), which confirmed that heat transfer efficiency had returned to optimal levels.
Significant Energy Savings: By removing the scale, the compressor no longer has to work against high-head pressure, leading to a direct reduction in the building’s electricity usage.
Restored Cooling Capacity: CNI Enterprise now benefits from a more stable indoor climate, as the WCPU can once again reach its rated cooling tonnage.
Asset Protection: Regular descaling prevents the compressor from overheating, significantly extending the life of this expensive mechanical asset.
Based in Kuala Lumpur, EKG is a premier MEP specialist dedicated to technical excellence in HVAC, electrical, and plumbing systems. From specialized WCPU descaling at CNI Enterprise to industrial AHU overhauls, we provide the engineering rigor needed to keep Malaysia's infrastructure performing at its peak.
Is your WCPU tripping on high pressure or struggling to cool? Contact us today for a professional site audit and a custom-engineered chemical cleaning proposal.
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