Emerson MINI-MATE2 Blower System, Air Distribution, Blower Removal, Refrigeration System

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System Operation, Testing and Maintenance

9.2.3Blower System

Monthly inspection of the blower package include: motor mounts, belts, fan bearings and impellers.

Fan impellers should be thoroughly inspected and any debris removed. Check to see if they are tightly mounted on the fan shaft and do not rub against the fan housing during rotation. Motor bearings are permanently sealed and self-lubricating and do NOT need lubricated.

The drive belt should be checked monthly for signs of wear and proper tension. Pressing on belts midway between the sheave and pulley should produce from 1/2” to 1” (12 to 25 mm) of deflection. Belts that are too tight can cause excessive bearing wear.

Belt tension can be adjusted by raising or lowering the fan motor base. Loosen nut above motor mounting plate to remove belt. Turn nut below motor mounting plate to adjust belt tension. If belt appears cracked or worn, it should be replaced with a matched belt (identically sized). With proper care, a belt should last several years.

NOTE

After adjusting or changing the belt, always be certain that motor base nuts are tightened. The bottom adjustment nut should be finger tight. The top locking nut should be tightened with a wrench.

Air Distribution

Since all unit models are designed for constant volume air delivery, any unusual restrictions within the air circuit must be avoided. High efficiency filters can reduce air performance and evaporator capacity.

9.2.4Blower Removal

If the blower or bearings must be removed or serviced, use the following procedure.

NOTICE

Risk of refrigerant and water/glycol piping damage. Can cause leaks that result in equipment and building damage and loss of cooling.

Use caution and do not contact piping when removing the blower motor and blower sled.

1.Remove the main center section of the three-piece electric panel by first marking and disconnecting all power and control wiring entering the panel.

2.Remove the panel by removing screws from top and bottom sections

3.Remove the blower motor from the blower sled.

4.Remove the four bolts holding the blower sled to the base isolators.

5.Slide the blower/sled assembly forward and rotate 90°.

6.Slide the blower/sled assembly from unit after ensuring that the refrigerant and water piping are protected from damage.

7.Reinstall by reversing this procedure.

9.2.5Refrigeration System

Each month the components of the refrigeration system should be inspected for proper function and signs of wear. Since in most cases evidence of malfunction is present prior to component failure, periodic inspections can be a major factor in the prevention of most system failures. Refrigerant lines must be properly supported and not allowed to vibrate against ceilings, floors or the unit frame. Inspect all refrigerant lines every six months for signs of wear and proper support. Inspect the capillary and equalizer lines from the expansion valve.

Suction Pressure

Suction pressure will vary with load conditions. Suction pressure normally ranges from 58 psi to 75 psi (405 kPa to 517 kPa).

Liebert® Mini-Mate2™

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Contents Liebert Mini-Mate2 Page Table of Contents Microprocessor Control System Performance Microprocessor ControlsAlarms System OPERATION, Testing and MaintenanceTables Important Safety Instructions Liebert Mini-Mate2 Product Model Information Air-cooled systems-indoor centrifugal condensing unitsPFH 0 67 a a L System configurations-60 Hz System configurations-50 HzIntroduction Condensing Unit Section-Split System Standard FEATURES-5 TON SystemsEvaporator Section-Split System Chilled Water UnitsOther Standard Control Features System ControlsHumidifier Switches and MotorsReheat SensorsFree-Cooling Optional Configurations-Prop Fan Condensing UnitsOptional Configurations-Water/Glycol Condensing Units Optional Configurations-Chilled Water Units SHIP-LOOSE ACCESSORIES-FIELD-INSTALLED Ship-Loose Accessories-Field-Installed Room Preparation Installation ConsiderationsSite Preparation and Installation Location Considerations Air-cooled systemsCooling Drycooler Ceiling Unit WeightsUnit weights Cooling UnitsEquipment Inspection Upon Receipt Installing the Ceiling UnitsClose Coupled Installations Evaporator Air Distribution Filter BoxHumidifier Water Supply Line Connections for Ducted SystemsPiping Connections and Coolant Requirements Drain Line Evaporator external static pressureEquivalent Pipe Liquid Suction Length, ft m Recommended refrigerant line sizesEquivalent lengths for various pipe fittings, ft m Copper PipeVertical fall below evaporator Pipe length and condenser elevation relative to evaporatorVertical rise above evaporator/maximum Refrigerant charge Total refrigerant = Units and LinesQuick Connect Fittings Line charges refrigerant per 100 ft m of Type L copper tubeDPN000218 Threaded rod and hardware kit installation Electrical ConnectionsPower Connections Control ConnectionsEvaporator unit electrical connections Close coupled installation General Considerations Piping ConnectionsDucting Considerations for Specific ApplicationsAIR-COOLED Dimensional Data AIR Cooled AIR-COOLED Model # 60Hz 50Hz Outdoor Air-Cooled Condensing Unit InstallationWeight, lb kg Rev Regulating Valve Water/Glycol Piping ConsiderationsCondensing Unit Fluid Requirements WATER/GLYCOL Dimensional Data WATER/GLYCOL DPN000214 Hot Water Reheat Coil Optional free-cooling coil 3-way valve on water/glycol unitsChecklist for Completed Installation Feature Overview Microprocessor ControlMain Menu Menu SetpointsTime Active AlarmsStatus DateShow DIP Switch Setup OperationRestart Time Delay 2 C/F DegreesFunction Default Range Change PasswordsSetup functions, default values and allowable ranges Calibrate SensorsCommon Alarm Enable Alarm EnableAlarm Time Delay Alarm default time delaysCustom Text Custom AlarmsStandard Custom Alarm Messages LCD Display ContrastEquipment switch settings unit control board Run Diagnostics Available On Rev 1.001.0 and higherEquipment Options Switches Switch settings wall box boardTest Outputs Test Control BoardControl menu Control board-inside evaporator Wall box boardSystem Performance Microprocessor Controls Temperature ControlHumidity Control Communications Load Control FeaturesHumidification Operation Custom Alarms Alarms Definitions and TroubleshootingAlarms High Head PressureHigh Water Alarm TemperatureHumidifier Problem Alarm Air-Cooled SystemsOptional/Custom Alarms System OPERATION, Testing and Maintenance System TestingMaintenance and Component Operation Blower Removal Blower SystemAir Distribution Refrigeration SystemThermostatic Expansion Valve Glycol Solution MaintenanceDischarge Pressure Air-Cooled Condensing UnitsHot Gas Bypass Hot gas bypassMechanical Failure Replacement ProceduresCompressor Replacement Electrical FailureReplace a Failed Compressor Steam Generating Humidifier-Operation Procedures Replacing the Humidifier Canister Humidifier Circuit Board AdjustmentsHumidifier control board DIP switch settings AmpsMaintenance Inspection Checklist Troubleshooting TroubleshootingShort Symptom Possible Cause Check Or Remedy Cooling cycle tooDisplay Problem Display freezesTwor k Ne tPpor t Is t Care

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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