System Operation, Testing and Maintenance

Replace a Failed Compressor

Proper procedures to remove and replace the failed compressor are:

1.Disconnect power

2.Attach suction and discharge gauges to access fittings.

3.Recover refrigerant using standard recovery procedures and equipment. Use a filter-drier when charging the system with recovered refrigerant.

NOTE

Release of refrigerant to the atmosphere is harmful to the environment and unlawful. Refrigerant must be recycled or discarded in accordance with federal, state and local regulations.

4.Remove failed compressor.

5.Install replacement compressor and make all connections. Use a flow of dry nitrogen through the piping during brazing to prevent formation of copper oxide scale inside the piping. Copper oxide forms when copper is heated in the presence of air. POE oil will dissolve these oxides from inside the copper pipes and deposit them throughout the system, clogging filter driers and affecting other system components.

A pure dry nitrogen flow of 1-3 ft3/min (0.5-1.5 l/s) inside the pipe during brazing is sufficient to displace the air. Control the flow using a suitable metering device.Pressurize and leak test the system at approximately 150 psig (1034kPa) pressure.

6.Follow manufacturer's instructions for clean out kits.

7.Evacuate the system twice to 250 microns. Break the vacuum each time with clean, dry nitrogen.

8.Evacuate the system a third time to 250 microns.

9.Charge the system with refrigerant (R-407C) based on requirements of the evaporator, condensing unit and lines. Refer to the unit nameplate.

10.Apply power and operate the system. Check for proper operation. Refer to Table 23.

Liebert® Mini-Mate2™

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Emerson MINI-MATE2 user manual Replace a Failed Compressor
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MINI-MATE2 specifications

The Emerson MINI-MATE2 is a cutting-edge temperature and pressure monitoring device specifically designed for the needs of the refrigeration and HVAC industries. Known for its reliability and user-friendly interface, this compact unit serves as a key tool for technicians and facility managers looking to optimize system performance while ensuring compliance with safety standards.

One of the main features of the MINI-MATE2 is its advanced digital display, which allows users to easily monitor and interpret temperature and pressure readings in real-time. Its highly responsive sensors ensure accurate data collection, vital for maintaining optimal operating conditions. Moreover, the device supports a wide range of refrigerants, making it versatile for different applications, from walk-in coolers to commercial refrigeration systems.

The MINI-MATE2 utilizes state-of-the-art technology to enhance efficiency and performance. Equipped with Bluetooth connectivity, it allows for wireless communication with mobile devices, enabling technicians to track readings and receive alerts remotely. This feature not only improves convenience but also helps in quick decision-making, ensuring timely interventions when anomalies are detected.

Another significant characteristic is its robust construction. Built to withstand harsh environments, the MINI-MATE2 features a durable casing that protects it from physical impacts and environmental factors. This resilience ensures longevity, making it a cost-effective investment for any facility.

In addition, the MINI-MATE2 is designed with user-friendliness in mind. Its intuitive interface means that even technicians with limited experience can easily navigate its functionalities. Quick setup and straightforward operation allow for rapid adoption and extensive use in a variety of settings.

Finally, the MINI-MATE2 also includes built-in data logging capabilities. Users can record historical data for analysis and reporting purposes, which is essential for performing trend analysis and identifying potential issues before they escalate. By providing a comprehensive overview of system performance, the MINI-MATE2 empowers users to make informed decisions that can lead to improved energy efficiency and reduced operational costs.

Overall, the Emerson MINI-MATE2 is an indispensable tool for modern refrigeration and HVAC applications, combining cutting-edge technology, user-friendly design, and essential features to support efficient system management.
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