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Chiller Units Maintenance Checklist That Every Laboratory Operator Should Know

Chillers are substantial capital investments and are a significant contributor to operating costs in commercial facilities and laboratories. For most laboratories, chilling units are the single largest energy users. This is why comprehensive maintenance is a must to ensure reliability and smooth operation.

While some laboratories use predictive maintenance, including infrared thermography, vibration analysis, and rotor bar testing, to detect problems in advance, a comprehensive preventive maintenance plan is the key to ensuring the optimum efficiency of a chiller.

Maintaining a daily operating log

Chiller operators should draft chiller performance daily with a detailed log, comparing this performance with design data to identify problems. This will allow you to compile a history of operating conditions, which can later be analyzed to determine trends of potential issues.

For example, if you notice a gradual increase in condensing pressure throughout a month, you can consult the daily operating log to check and correct the possible cause of it.

Keeping tubes clean

Large Chillers Unit USA contain tubes in their heat exchangers. Keeping these large surfaces clean is the key to maintaining high-efficiency performance.

Chiller efficiency deteriorates as these tubes become fouled in the presence of algae, mud, sludge, scale, and contaminants. The occurrence of fouling depends on the system type, water quality, temperature, and cleanliness. Therefore, it is recommended to clean condenser tubes annually.

Ensuring a leak-free unit

Manufacturers suggest quarterly inspections of compressors for potential leaks. Low-pressure chillers feature high-efficiency purification units that remove non-condensable elements to maintain design-condensing pressure, promoting efficient operation.

Moisture in a chiller can also create acids that corrode motor windings and bearings, causing rust to occur inside the shell. As a result, small rust particles float in the vessels and get caught inside heat-exchanger tubes. This, in turn, decreases the unit’s heat-transfer efficiencies with time. If they are left unchecked, it can lead to costly tube repairs down the line.

The best way to control leaks in a low-pressure chiller is to evaluate purge-unit runtime and moisture accumulation.

Sustaining proper water treatment

Most chiller units use water for heat transfer. That means the water must be treated appropriately to prevent corrosion and scale. One-time chemical treatment is suggested for closed-water systems.

Open systems are used for condenser-water systems attached to the chiller condenser. Condenser systems that use sources like cooling towers need continuous chemical water treatment. You must work with a chemical-treatment merchant familiar with local water supplies that offer full-service maintenance for facility water systems.

Analyzing oil and refrigerant

Yearly chemical analysis of oil and refrigerant systems can help detect contamination problems before they become severe. You should conduct spectrometric chemical analysis to check for contaminants, including moisture, metals, and acids, hindering performance and efficiency.

Whether you have an industrial site, laboratory, a commercial facility that needs chillers, Viking Lab can assist you with choosing the right one that suits your budget. We carry all sorts of equipment used in laboratories that you can purchase at an affordable rate. Visit our website if you have further queries.

Thursday, July 8, 2021

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