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Liebert Mini-Mate2 MMD24E User Manual

Liebert Mini-Mate2 MMD24E
80 pages
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Precision Cooling
For Business-Critical Continuity™
Liebert Mini-Mate2
User Manual - 2 & 3 Tons, 50 & 60Hz

Table of Contents

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Liebert Mini-Mate2 MMD24E Specifications

General IconGeneral
Cooling Capacity24, 000 BTU/hr
Phase1
RefrigerantR-410A
Compressor TypeScroll
Voltage208/230V
Hertz60 Hz

Summary

IMPORTANT SAFETY INSTRUCTIONS

Electrical Safety Warnings

Warns about electrical hazards like arc flash, shock, and high voltage, emphasizing power disconnection.

Refrigerant System Safety

Alerts to the danger of high-pressure refrigerant and potential explosion risks from overpressurization.

Mechanical and Thermal Safety

Highlights dangers from moving parts, hot surfaces, and sharp edges, requiring caution and protective gear.

Water and Environmental Safety

Cautions about water leakage, freezing/corrosion risks, and proper water treatment for coils.

Handling and Storage Precautions

Advises on proper forklift handling, storage, and avoiding sharp edges to prevent unit damage.

PRODUCT NUMBER NOMENCLATURE

Evaporator Unit Model Codes

Explains the model number coding system for evaporator units, detailing capacity and features.

Condensing Unit Model Codes

Details model number coding for air-cooled, water/glycol, and outdoor condensing units.

Chilled Water Unit Model Codes

Explains the model number coding system for chilled water units, covering various configurations.

INTRODUCTION TO THE LIEBERT MINI-MATE2

System Design and Capabilities

Details unit capabilities, ease of use, installation, service, control, efficiency, and reliability.

Agency Listing and Location Guidance

Covers CSA certification and important location considerations for installation.

STANDARD FEATURES (2 & 3 TON SYSTEMS)

Evaporator Section Features

Describes the evaporator section for split systems, including construction and insulation.

Condensing Unit Section Features

Details features of indoor centrifugal, outdoor prop fan, and water/glycol condensing units.

Chilled Water Unit Features

Describes the self-contained chilled water unit features, including coil and blower.

System Controls Overview

Explains the microprocessor control system and wall-mounted interface with LCD and keypad.

Additional Control Features

Lists other standard control features like auto restart, setback, and diagnostics.

OPTIONAL FACTORY-INSTALLED FEATURES

Reheat Options

Details electric and hot water reheat options for temperature control.

Humidifier Options

Describes canister and remote contact humidifier options.

Sensors and Switches

Covers filter clog, smoke, and high-temperature sensors, plus switches.

Free-Cooling System Option

Explains the free-cooling option for utilizing ambient conditions to reduce compressor use.

Optional Condensing Unit Configurations

Lists optional configurations for prop fan and water/glycol condensing units.

Optional Chilled Water Unit Configurations

Mentions optional valve configurations for chilled water units.

SHIP-LOOSE ACCESSORIES: FIELD-INSTALLED

Air Distribution Accessories

Covers filter box kits and air distribution plenums for ducted systems.

Condensate Pump and Remote Sensors

Explains the condensate pump kit and remote sensor package.

Field-Installed Kits and Power Options

Lists kits for sensors, reheat, humidifier, and transformer/power options.

Refrigerant Lines and Adapters

Describes pre-charged line sets and sweat adapter kits for refrigerant connections.

Remote Monitoring and Control Equipment

Details equipment for remote monitoring, autochangeover, and leak detection systems.

SITE PREPARATION AND INSTALLATION

Installation Considerations and Requirements

Discusses general considerations before and during installation, including drawings, clearances, and system configurations.

Room and Location Requirements

Covers room preparation, vapor barriers, and selecting suitable installation locations.

Ceiling Unit Installation Procedures

Provides safety warnings and step-by-step instructions for mounting ceiling units.

Air Distribution and Piping Connections

Covers air distribution options and required piping connections for various systems.

Water/Glycol and Refrigerant Loop Piping

Discusses piping for water/glycol loops and refrigerant line installation methods.

Condensate Pump and Electrical Connections

Details condensate pump installation and general electrical wiring requirements.

INDOOR AIR-COOLED CENTRIFUGAL FAN CONDENSING UNIT INSTALLATION

Location and Electrical Connections

Discusses location considerations and refers to general wiring requirements.

Piping and Ducting

Refers to piping details and covers ducting requirements for air flow.

OUTDOOR AIR COOLED CONDENSING UNIT INSTALLATION

Location and Connection Requirements

Discusses location considerations and refers to piping and electrical connection requirements.

WATER AND GLYCOL COOLED CONDENSING UNIT INSTALLATION

Location and Connection Requirements

Discusses location, electrical, and piping considerations for water/glycol units.

Piping, Fluid, and Valve Considerations

Discusses piping, fluid requirements, and regulating valves for these units.

OPTIONAL EQUIPMENT PIPING

Free-Cooling Coil and Hot Water Reheat Piping

Explains the piping for the free-cooling coil and hot water reheat coil.

COMPLETED INSTALLATION CHECKLIST

MICROPROCESSOR CONTROL SYSTEM

Control Feature Overview and Menu Navigation

Introduces control keys, feature overview, and main menu navigation.

Setpoint and Setup Operation

Details setpoint configuration and setup operation functions like time delay and humidity control.

Status, Alarms, and Time/Date Settings

Explains status monitoring, alarm management, and setting time/date.

Password Management and Alarm Configuration

Instructions for password management, alarm enabling, and time delays.

Custom Alarms, Diagnostics, and Board Settings

Covers custom alarms, text entry, diagnostics, and equipment options switches.

System Diagnostics and Testing

Details how to run system diagnostics to check inputs, outputs, and board tests.

SYSTEM TESTING AND MAINTENANCE

System Testing Procedures

Outlines procedures for testing cooling, heating, humidification, and dehumidification functions.

Routine Maintenance Procedures

Details routine maintenance for electric panel, filters, blower packages, and refrigeration systems.

Condensing Unit and Hot Gas Bypass Maintenance

Discusses maintenance for condensing units, glycol systems, and the hot gas bypass system.

Humidifier and Compressor Replacement

Covers humidifier procedures, circuit board adjustments, and compressor replacement.

TROUBLESHOOTING GUIDE

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