Emerson VERTIV Liebert Mini-Mate2 Series User manual

University of Arkansas Animal Facility
700 Research Center Blvd.
Fayetteville, AR. 72701
Ta : AHU / CU
Liebert/Vertiv Closeout Documentation
• Liebert MiniMate User Manual (AHU)
• Liebert PFH Condenser User Manual (CU)
• Liebert Warranty
ITS Solutions
5200 Northshore Dr.
North Little Rock, AR. 72118
501-687-0286
Dated 7/13/2020

Precision Cooling
For Business-Critical Continuity™
Liebert®Mini-Mate2™
User Manual - 1 & 1.5 Tons, 50 & 60Hz

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TABLE OF CONTENTS
MODEL NUMBER NOMENCLATURE—ALL SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
SAVE THESE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
1.1 Designed to Match Computer and Electronic Equipment Needs—From Installation to Oper-
ation7
2.0 STANDARD FEATURES—1 & 1.5 TON SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.1 Self-Contained Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.1 Air-Cooled Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.2 Water/Glycol-Cooled Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.3 Chilled Water Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Evaporator Section—Split Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Condensing Unit Section—Split System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4 System Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4.1 Other Standard Control Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.0 OPTIONAL FACTORY-INSTALLED FEATURES—SELF-CONTAINED AND EVAPORATOR UNITS .11
3.1 Reheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Humidifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.4 Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.5 Free-Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.6 Optional Configuration—Prop Fan Condensing Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.7 Optional Configurations—Water/Glycol-Cooled Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.8 Optional Configuration—Chilled Water Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.0 SHIP-LOOSE ACCESSORIES—FIELD-INSTALLED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
4.1 Remote Monitoring, Autochangeover and Leak Detection Equipment. . . . . . . . . . . . . . . . . 13
5.0 SITE PREPARATION AND INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
5.1 Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1.1 Room Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1.2 Location Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.2 System Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.3 Equipment Inspection (Upon Receipt) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.4 Installing Ceiling Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.4.1 Evaporator Air Distribution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.4.2 Piping Connections and Coolant Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.4.3 Condensate Pump Kit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.4.4 Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.5 Centrifugal Condenser Fan Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.5.1 Electrical, Control and Power Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.5.2 Indoor Condenser Fan Ductwork. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

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5.6 Outdoor Air-Cooled Condensing Unit Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.6.1 Location Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.6.2 Piping Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.6.3 Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.7 Checklist for Completed Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.0 MICROPROCESSOR CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
6.1 Feature Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.1.1 Setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
6.1.2 Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6.1.3 Active Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6.1.4 Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6.1.5 Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6.1.6 Setback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6.1.7 Setup Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6.1.8 Change Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
6.1.9 Calibrate Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
6.1.10 Alarm Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
6.1.11 Alarm Time Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
6.1.12 Common Alarm Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
6.1.13 Custom Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6.1.14 Custom Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6.1.15 Run Diagnostics (Available On Rev 1.001.0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
7.0 SYSTEM PERFORMANCE MICROPROCESSOR CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . .51
7.1 Temperature Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.1.1 Cooling/Heating Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.1.2 Cooling Operation (Cooling, Compressorized Direct Expansion and Chilled Water). . . . . . . 51
7.1.3 Heating Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.2 Humidity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.2.1 Dehumidification/Humidification Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.2.2 Dehumidification Operation, Compressorized Direct Expansion (DX) Systems . . . . . . . . . . 52
7.2.3 Humidification Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.3 Load Control Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.4 Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
8.0 ALARMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
8.1 Alarms: Definitions and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
8.1.1 Custom Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
8.1.2 High Head Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
8.1.3 Humidity Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
8.1.4 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
8.1.5 Humidifier Problem Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
8.1.6 High-Water Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
8.1.7 Loss of Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
8.1.8 Short Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
8.2 Optional/Custom Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
8.2.1 Loss of Water Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
8.2.2 Smoke Detected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

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9.0 SYSTEM TESTING AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
9.1 System Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.1.1 Environmental Control Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.1.2 Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.1.3 Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.1.4 Humidification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.1.5 Dehumidification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.1.6 High-Temperature Sensor—Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.1.7 Smoke Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.1.8 Remote Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.2 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
9.2.1 Electric Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
9.2.2 Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
9.2.3 Direct Drive Blower Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
9.2.4 Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
9.3 Replacement Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9.3.1 Compressor Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9.3.2 Electrical Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9.3.3 Steam Generating Humidifier—Operation Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9.3.4 Humidifier Circuit Board Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
10.0 MAINTENANCE INSPECTION CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
11.0 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
FIGURES
Figure 1 Model number nomenclature—Self-contained, air-cooled units . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2 Model number nomenclature—Split evaporator air-cooled units . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Figure 3 Model number nomenclature—Outdoor air-cooled prop fan condensing units . . . . . . . . . . . . . . . . 2
Figure 4 Model number nomenclature—Self-contained, water/glycol-cooled units . . . . . . . . . . . . . . . . . . . . 3
Figure 5 Model number nomenclature—Chilled water units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 6 Wall-mounted display box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 7 Free cooling option—example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 8 Air-cooled systems, 1 and 1.5 tons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 9 Water/glycol-cooled systems, 1 and 1.5 tons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 10 Split system, air-cooled systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 11 Refrigerant piping diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 12 Dimensions—Air-cooled, self-contained and split systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 13 Dimensions—Return filter box, all systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 14 Dimensions—Supply/return grille kit, all systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 15 Unit piping data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 16 Unit piping data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 17 Condensate pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 18 General arrangement diagram - split systems with air-cooled condensing units. . . . . . . . . . . . . 30
Figure 19 Free-cooling coil arrangement, air-cooled units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 20 General arrangement—Self-contained air-cooled unit with hot gas reheat . . . . . . . . . . . . . . . . . 31
Figure 21 General arrangement—Split systems with air-cooled condensing units. . . . . . . . . . . . . . . . . . . . 31
Figure 22 Unit electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 23 Centrifugal condenser fan dimensions and installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

iv
Figure 24 Piping and electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 25 Electrical field connections, 1- to 5-ton units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 26 Microprocessor control layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 27 Control menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 28 Control board (inside evaporator) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 29 Wall box board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Figure 30 Ground current detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 31 Hot gas bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
TABLES
Table 1 Application limits - evaporator and chilled water units* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 2 Application limits - outdoor air-cooled condensing unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 3 Application limits - water/glycol-cooled condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 4 Unit weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 5 Recommended line sizes, O.D. Cu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 6 Pipe length and condenser elevation relative to evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 7 Equivalent lengths for various pipe fittings, ft (m). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 8 Connection sizes and torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 9 Refrigerant charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 10 Line charges—refrigerant per 100 ft. (30m) of Type L copper tube . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 11 Refrigerant charge in Liebert pre-charged R-407C line sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 12 Unit net weights—Air-cooled units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 13 Unit dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 14 Recommended minimum wire size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 15 Piping and electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 16 View default setpoints and allowable ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 17 Logging a setback plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Table 18 Setup functions, default values and allowable ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Table 19 Alarm default time delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Table 20 Equipment switch settings (unit control board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table 21 Switch settings (wall box board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table 22 Control board connections and functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Table 23 Cooling and dehumidification load response of hot gas bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 24 Typical discharge pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Table 25 DIP switch settings for humidifier control board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Table 26 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Model Number Nomenclature—All Systems
1Liebert
®Mini-Mate2™
MODEL NUMBER NOMENCLATURE—ALL SYSTEMS
Figure 1 Model number nomenclature—Self-contained, air-cooled units
D = Disconnect Switch
0 = No Disconnect Switch
Liebert Mini-Mate2
— = Placeholder
Humidification
H = Canister Humidifier
0 = No Humidifier
R = Remote Humidifier Contact
J = Canister Humidifier and Remote
Humidifier Contact
Reheat Type
0 = No Reheat
E = Electric Reheat
S = SCR Reheat
G = Hot Gas Reheat (Not available
with Free-Cooling Option)
Supply Power
P = 208/230-1-60
X = 277-1-60
Unit Type
A = Air-Cooled
F = Air-Cooled with
Free-Cooling Coil
Refrigerant & Hot Gas Bypass
7 = R-407C & Hot Gas Bypass
Nominal Capacity, kBtuh
12 & 18 (60Hz)
Sensor Packages
0 = None
A = Filter Clog
B = Smoke Sensor
C = High-Temperature Sensor
D = Filter Clog and Smoke Sensor
E = Filter Clog and High-Temperature Sensor
F = Smoke Sensor and High-Temperature Sensor
G = Filter Clog, Smoke Sensor and High-Temperature Sensor
MM D 18 — P H AAE7

Model Number Nomenclature—All Systems
Liebert®Mini-Mate2™2
Figure 2 Model number nomenclature—Split evaporator air-cooled units
Figure 3 Model number nomenclature—Outdoor air-cooled prop fan condensing units
MM
D = Disconnect Switch
0 = No Disconnect Switch
Liebert Mini-Mate2
Refrigerant
7 = R-407C (E/K Unit Types)
Humidification
H = Canister Humidifier
0 = No Humidifier
R = Remote Humidifier Contact
J = Canister Humidifier and Remote
Humidifier Contact
D18 7 P H A
Reheat Type
0 = No Reheat
E = Electric Reheat
S = SCR Reheat (E Unit Type only)
Supply Power
P = 208/230-1-60
X = 277-1-60
EE0
Unit Type
E = Split Evaporator
K = Split Evaporator
with Free-Cooling
Hot Gas Bypass
0 = Not Contained in Unit
Nominal Capacity, kBtuh
12 & 18 (60Hz)
Sensor Packages
0 = None
A = Filter Clog
B = Smoke Sensor
C = High-Temperature Sensor
D = Filter Clog and Smoke Sensor
E = Filter Clog and High-Temperature Sensor
F = Smoke Sensor and High-Temperature Sensor
G = Filter Clog, Smoke Sensor and High-Temperature Sensor
PFH
Nominal Capacity, kBtuh
PFH = Prop Fan Condensing Unit with Hot Gas Bypass
P = 208/230V - 1ph - 60Hz
020A PL7
L = 95°F Ambient,
Liebert Lee-Temp™
0 = Std. Sound Level
— = Standard Coil
C = Coated Coil
Cooling Method
A = Air-Cooled
Refrigerant
7 = R-407C
—

Model Number Nomenclature—All Systems
3Liebert
®Mini-Mate2™
Figure 4 Model number nomenclature—Self-contained, water/glycol-cooled units
MM
D = Disconnect Switch
0 = No Disconnect Switch
Liebert Mini-Mate2
Valve Type
2 = 2-Way Std. Pressure Fluid Regulating Valve
3 = 3-Way Std. Pressure Fluid Regulating Valve
D = 2-Way High Pressure Fluid Regulating Valve
T = 3-Way High Pressure Fluid Regulating Valve
Humidification
H = Canister Humidifier
0 = No Humidifier
R = Remote Humidifier Contact
J = Canister Humidifier and Remote
Humidifier Contact
D20 2 P H A
Reheat Type
0 = No Reheat
E = Electric Reheat
S = SCR Reheat
G = Hot Gas Reheat (Not available
with Free-Cooling Option)
Supply Power
P = 208/230-1-60
X = 277-1-60
WE7
Unit Type
W = Water/Glycol-Cooled
G = Water/Glycol-Cooled
with Free-Cooling Coil
Refrigerant & Hot Gas Bypass
7 = R-407C & Hot Gas Bypass
Sensor Packages
0 = None
A = Filter Clog
B = Smoke Sensor
C = High-Temperature Sensor
D = Filter Clog and Smoke Sensor
E = Filter Clog and High-Temperature Sensor
F = Smoke Sensor and High-Temperature Sensor
G = Filter Clog, Smoke Sensor and High-Temperature Sensor
Nominal Capacity, kBtuh
14 & 20 (60 Hz)

Model Number Nomenclature—All Systems
Liebert®Mini-Mate2™4
Figure 5 Model number nomenclature—Chilled water units
MM
D = Disconnect Switch
0 = No Disconnect Switch
Liebert Mini-Mate2
Valve Type
2 = 2-Way Valve (Std Close-off)
D = 2-Way Valve (High Close-off)
Humidification
H = Canister Humidifier
0 = No Humidifier
R = Remote Humidifier Contact
J = Canister Humidifier and Remote
Humidifier Contact
D23 2 P H A
Reheat Type
0 = No Reheat
E = Electric Reheat
H = Hot Water Reheat
Supply Power
P = 208/230-1-60
X = 277-1-60
S = 220-1-50
CE0
Unit Type
C = Chilled Water
Hot Gas Bypass
0 = Not Contained in Unit
Nominal Capacity, kBtuh
23 (60Hz)
22 (50Hz)
Sensor Packages
0 = None
A = Filter Clog
B = Smoke Sensor
C = High-Temperature Sensor
D = Filter Clog and Smoke Sensor
E = Filter Clog and High-Temperature Sensor
F = Smoke Sensor and High-Temperature Sensor
G = Filter Clog, Smoke Sensor and High-Temperature Sensor

Important Safety Instructions
5Liebert
®Mini-Mate2™
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important safety instructions that should be followed during the installation
and maintenance of the Liebert Mini-Mate2. Read this manual thoroughly before attempting to
install or operate this unit. Only qualified personnel should move, install or service this equipment.
Adhere to all warnings, cautions and installation, operating and safety instructions on the unit and in
this manual. Follow all installation, operation and maintenance instructions and all applicable
national and local building, electrical and plumbing codes.
!
WARNING
Arc flash and electric shock hazard. Disconnect all electric power supplies and wear protective
equipment per NFPA 70E before working within electric control enclosure. Failure to comply
can cause serious injury or death.
Customer must provide earth ground to unit, per NEC, CEC and local codes, as applicable.
Before proceeding with installation, read all instructions, verify that all the parts are included
and check the nameplate to be sure the voltage matches available utility power.
The Liebert microprocessor control does not isolate power from the unit, even in the Unit Off
mode. Some internal components require and receive power even during the Unit Off mode.
The line side of the disconnect switch on the front of the unit contains live hazardous voltage
potential.
The only way to ensure that there is NO voltage inside the unit is to install and open a remote
disconnect switch and check the internal power supply wires with a voltmeter. Refer to unit
electrical schematic. Follow all applicable national and local electric codes.
!
WARNING
Risk of explosive discharge from high-pressure refrigerant. Can cause injury or death.
This unit contains fluids and gases under high pressure. Relieve pressure before working with
piping.
!
WARNING
Risk of refrigerant system rupture or explosion from overpressurization. Can cause
equipment damage, injury or death.
If a pressure relief device is not provided with the condenser unit, the system installer must
provide and install a discharge pressure relief valve per national and local codes in the high
side refrigerant circuit. Do not install a shutoff valve between the compressor and the field
installed relief valve. Do not isolate any refrigerant circuits from overpressurization
protection.
!
WARNING
Risk of high-speed moving parts. Can cause injury or death.
Open all local and remote electrical power disconnect switches before working within the unit
and component electrical enclosures.
!
CAUTION
Risk of contact with hot surfaces. Can cause injury.
The compressors, refrigerant discharge lines, humidifiers and reheats are extremely hot
during unit operation. Allow sufficient time for them to cool before working within the unit
cabinet. Use extreme caution and wear protective gloves and arm protection when working on
or near hot compressors, discharge lines, humidifiers and reheats.

Important Safety Instructions
Liebert®Mini-Mate2™6
NOTICE
Risk of leaking water. Can cause equipment and building damage.
Improper installation, application and service practices can result in water leakage from the
unit. Do not mount this unit over equipment and furniture that can be damaged by leaking
water. Install a water tight drain pan with a drain connection under the cooling unit and the
ceiling mounted water/glycol condenser unit. Route the drain pan to a frequently used
maintenance sink so that running water can be observed and reported in a timely manner.
Post a sign to alert people to report water flowing from the secondary drain pan. Emerson
recommends installing monitored leak detection equipment for unit and supply lines and in
the secondary drain pan. Check drain lines periodically for leaks, sediment buildup,
obstructions, kinks and/or damage and verify that they are free running.
NOTICE
Risk of a leaking coil due to freezing and/or corrosion. Can cause equipment and building
damage.
Cooling coils and piping systems that are connected to open cooling towers or other open
water/glycol systems are at high risk of freezing and premature corrosion. Fluids in these
systems must contain the proper antifreeze and inhibitors to prevent freezing and premature
coil corrosion. The water or water/glycol solution must be analyzed by a competent water
treatment specialist before startup to establish the inhibitor requirement. The water or
water/glycol solution must be analyzed every six months to determine the pattern of inhibitor
depletion. The complexity of water-caused problems and their correction makes it important
to obtain the advice of a water treatment specialist and follow a regularly scheduled
maintenance program.
NOTICE
Risk of damage from forklift. Can cause unit damage.
Keep tines of the forklift level and at a height suitable to fit below the skid and/or unit to
prevent damage.
NOTICE
Risk of improper storage. Can cause unit damage.
Keep the Liebert Mini-Mate2 upright, indoors and protected from dampness, freezing
temperatures and contact damage.
!
CAUTION
Risk of sharp edges, splinters and exposed fasteners. Can cause injury.
Only properly trained and qualified personnel wearing appropriate safety headgear, gloves,
shoes and glasses should attempt to move the unit, lift it, remove packaging from or prepare
the unit for installation.

Introduction
7Liebert
®Mini-Mate2™
1.0 INTRODUCTION
1.1 Designed to Match Computer and Electronic Equipment Needs—From Installation
to Operation
Installed above the ceiling, the Liebert Mini-Mate2 system controls the cooling, humidity and air
distribution required by sensitive electronic equipment. A range of sizes and configurations are
available to meet site needs.
The Liebert Mini-Mate2 is also easy to use. Advanced microprocessor technology allows easy, precise
control, and menu-driven monitoring keeps you informed of system operation through the LCD
readout. These features, combined with Liebert quality construction and reliable components,
guarantee satisfaction from installation through operation.
Liebert Precision Cooling
Liebert Precision Cooling systems are designed to control the temperature and humidity required for
computers and other sensitive electronic equipment. Liebert Mini-Mate2 provides complete control on
an around-the-clock basis, as well as the high sensible heat ratio required by sensitive electronic
equipment.
Easy Installation
Self-contained systems have all refrigerant piping factory installed. Split-system evaporator and
outdoor condensing unit are pre-charged with refrigerant and are available with pre-charged
refrigerant lines or sweat adapters for field refrigerant piping. Thermostat-type wiring to control wall
box and condensing units, if applicable, further simplifies the installation.
Easy to Service
Low-maintenance components are easily accessed through removable panels. Spare parts are always
in Liebert’s inventory and available on short notice.
Advanced Control Technology
A menu-driven microprocessor control system provides precise temperature and humidity control and
accurate alarm setpoints. Using touch sensitive buttons, the wall-mounted monitor/control panel
allows you to display temperature and other monitored parameters.
High Efficiency
High system efficiency is a result of high sensible heat ratio, two selectable fan speeds and precise
microprocessor control.
Space Saving Design
All indoor components are installed above the ceiling, so no floor space is required.
Reliable
The Liebert Mini-Mate2 family installed base is a testimony to the system’s reliability. Components
include a rugged compressor, high-efficiency copper tube, aluminum fin evaporator coil and a double
inlet, direct-drive fan.
Agency Listed
Standard 60Hz units are CSA Certified to the harmonized U.S. and Canadian
product safety standard CSA C22.2 No 236/UL 1995 for “Heating and Cooling
Equipment” and are marked with the CSA c-us logo.

Introduction
Liebert®Mini-Mate2™8
Location
When determining installation locations, consider that these units contain water and that water
leaks can cause damage to sensitive equipment and furniture below.
NOTICE
Risk of leaking water. Can cause equipment and building damage.
Do not mount units over equipment or furniture that can be damaged by leaking water.
Install a watertight drain pan with a drain connection beneath ducted cooling units and
ceiling mounted water/glycol condenser units. Route the drain line to a frequently used
maintenance sink so that running water can be observed and reported in a timely manner.
Post a sign to report running water from the secondary drain.
Do not install units in areas where normal unit operating sound might disturb the working
environment.

Standard Features—1 & 1.5 Ton Systems
9Liebert
®Mini-Mate2™
2.0 STANDARD FEATURES—1 & 1.5 TON SYSTEMS
2.1 Self-Contained Systems
The self-contained system is designed for ceiling installation. The cabinet and chassis are constructed
of heavy gauge galvanized steel. The unit can be serviced using only one side, increasing its
versatility in mounting locations. Mounting brackets are factory-attached to the cabinet. Internal
cabinet insulation meets ASHRAE 62.1 requirements for Mold Growth, Humidity & Erosion, tested
per UL 181 and ASTM 1338 standards. Unit can be configured with canister humidifier and/or reheat
and various sensor options.
2.1.1 Air-Cooled Unit
The air-cooled unit includes the evaporator coil, condenser coil, compressor, all refrigerant piping,
R-407C unit charge, hot gas bypass, filter drier, high head pressure switch, two-speed direct-drive
blower assembly, microprocessor control with wall-mounted control box and factory-mounted
disconnect switch. MM2CF is a centrifugal blower box with a fan speed controlled motor that ships
separately and field-mounts on the cabinet to provide condenser head pressure control down to -20°F
(-29°C) ambient.
2.1.2 Water/Glycol-Cooled Unit
The water/glycol-cooled unit includes the evaporator coil, coaxial condenser, compressor, all internal
refrigerant and water/glycol piping, R-407C unit charge, hot gas bypass, filter drier, high head
pressure switch, two-speed direct-drive blower assembly, microprocessor control with wall-mounted
control box and factory-mounted disconnect switch.
2.1.3 Chilled Water Unit
The chilled water unit includes the chilled water coil, two-speed, direct-drive centrifugal blower,
two-way, slow-close solenoid, spring-return valve and factory-mounted disconnect switch. Design
pressure is 300psi (2068 kPa) with a 25psi (172 kPa) close-off differential.
2.2 Evaporator Section—Split Systems
The split-system evaporator is designed for ceiling installation. The cabinet and chassis are
constructed of heavy gauge galvanized steel. The unit can be serviced using only one side increasing
its versatility in mounting locations. Mounting brackets are factory-attached to the cabinet. Internal
cabinet insulation meets ASHRAE 62.1 requirements for Mold Growth, Humidity & Erosion, tested
per UL 181 and ASTM 1338 standards. The evaporator section includes the evaporator coil, R-407C
unit charge, filter drier, two-speed direct-drive blower assembly, microprocessor control with
wall-mounted control box and factory-mounted disconnect switch. Unit can be configured with
canister humidifier and/or reheat and various sensor options.
2.3 Condensing Unit Section—Split System
The outdoor prop fan condensing unit includes compressor, condenser coil, R-407C unit charge, prop
fan, liquid-line solenoid valve, high-pressure switch, Liebert Lee-Temp™head pressure control and
hot gas bypass. Condensing unit is designed for outdoor locations with operating ambients ranging
from -30°F to 95°F (-34°C to 35°C).
2.4 System Controls
System controls include a microprocessor control board mounted in the cooling unit and a
wall-mounted interface with a two-line, 16-character liquid crystal display. An eight-key, membrane
keypad for setpoint/program control, unit On/Off, fan speed and alarm silence is below the LCD
screen. It provides temperature setpoint and sensitivity adjustment, humidity setpoint and
sensitivity adjustment, digital display of temperature, humidity, setpoints, sensitivities, fan speed
and alarm conditions.

Standard Features—1 & 1.5 Ton Systems
Liebert®Mini-Mate2™10
The wall-box is field-wired to the microprocessor control using standard four-conductor thermostat
wire (field-supplied). The temperature and humidity sensors are in the wall box, which can be
installed up to 300 feet (91.4m) from the evaporator unit. The unit-mounted control board also
includes common alarm terminals and shutdown terminals. The unit automatically restarts after a
power failure.
Figure 6 Wall-mounted display box
2.4.1 Other Standard Control Features
• Adjustable auto restart • Calibrate sensors
• 5 day/2 day setback • Predictive humidity control
• Password protection • Common alarm output
• Alarm enable/disable • Remote shutdown terminals
• Self-diagnostics

Optional Factory-Installed Features—Self-Contained and Evaporator Units
11 Liebert®Mini-Mate2™
3.0 OPTIONAL FACTORY-INSTALLED FEATURES—SELF-CONTAINED AND
EVAPORATOR UNITS
3.1 Reheat
Electric Reheat includes 304/304 stainless steel finned tubular reheat elements for added durability
and corrosion resistance with a high limit safety switch.
SCR Reheat provides tight temperature control by rapidly pulsing the 304/304 stainless steel reheat
elements in small increments. A solid state relay is factory-installed and wired to the microprocessor
control. The compressor is locked On, with the reheat modulated to track the load. Not available on
chilled water, free-cooling or other reheat options.
Hot Water Reheat includes a hot water coil, two-way solenoid valve and Y-strainer. Available only
on chilled water units; not available with other reheat options.
Hot Gas Reheat can be ordered on self-contained models. This option includes the coil and necessary
piping and the control valve. This option is not available with chilled water, free-cooling or other
reheat options.
3.2 Humidifier
The Canister Humidifier includes a steam-generating type humidifier with automatic flushing
circuit, inlet strainer, drain, 1" (25.4mm) air gap on fill line and solenoid valves. Humidifier problem
alarm annunciates at the wall-mounted display panel.
Remote Humidifier Contact allows the unit’s humidity controller to control a humidifier outside
the unit. Power to operate the remote humidifier does not come from the Liebert Mini-Mate2.
Available on units with or without internal humidifier.
3.3 Sensors
Smoke Sensor checks return air, shuts down the unit upon sensing smoke and activates visual and
audible alarms at the wall-box display. This smoke sensor is not intended to function as or replace
any smoke sensor system that may be required by codes.
High-Temperature Sensor senses the return air temperature and shuts down unit if the
temperature reaches 125°F (52°C). This device is not meant to replace any fire detection system that
may be required by national or local codes.
3.4 Switches
Filter Clog senses pressure drop across the filters and activates visual and audible alarms at the
wall-box display. The wall-box display annunciates the alarm and flashes a notification upon reaching
a customer setpoint.
A Factory-Installed Non-Fused Disconnect Switch allows the unit to be turned off for
maintenance.
A disconnect switch is standard for the evaporators, chilled water units and indoor condensing units,
but these units may be specified without the switch.

Optional Factory-Installed Features—Self-Contained and Evaporator Units
Liebert®Mini-Mate2™12
3.5 Free-Cooling
Free-cooling option includes separate cooling coil, three-way, slow-close valve and separate supply
and return piping. Free-cooling is activated when the water temperature reaches a field-adjustable
temperature, typically 45°F (7°C). The valve is rated for 300psi (2068kPa) working pressure.
Air-cooled units can be specified with free-cooling coils, allowing chilled water to be the primary
cooling and the air-cooled section to be the backup. Water/glycol units have two sets of piping, each
with three-way water regulating valves, increasing options of free-cooling sources, such as external
chilled water or glycol from a drycooler loop (see Figure 7). The free-cooling coil is designed for
closed-loop applications using properly treated and circulated fluid. Not available with SCR reheat
options.
Figure 7 Free cooling option—example
3.6 Optional Configuration—Prop Fan Condensing Units
Outdoor Prop Fan Condensing Units are also available in the following optional configurations:
• Condenser coils can be phenolic-coated for extended coil life in coastal areas.
3.7 Optional Configurations—Water/Glycol-Cooled Units
Water/glycol-cooled units are also available with the following piping options:
• Two-way water regulating valve with 350 psi (2413kPa) design pressure.
• Three-way water regulating valve with 150psi (1034kPa) design pressure.
• Three-way water regulating valve with 350psi (2413kPa) design pressure.
3.8 Optional Configuration—Chilled Water Units
Chilled water units are available with the following valve option:
• Three-way, slow-close, motorized chilled water valve rated for 300psi (2068kPa) working
pressure. Valve is non-spring return.
NOTE
If free-cooling is applied to an open water tower, a heat exchanger must separate the tower
water from the free-cooling loop.
Free -
Cooling
Coil
Water/Glycol
Condenser
Field Piping
Liebert Mini-Mate2
Water Temperature
Sensor
Drycooler
A free-cooling coil allows the system to take advantage of a
primary chilled water source or colder water/glycol temperatures
available during colder outdoor temperatures. When the fluid
temperature goes below 45°F (7.2°C), cooling switches to
free-cooling operation, bypassing compressor operation.

Ship-Loose Accessories—Field-Installed
13 Liebert®Mini-Mate2™
4.0 SHIP-LOOSE ACCESSORIES—FIELD-INSTALLED
Supply and Return Grille Kit includes supply and return grilles, 1" x 20" x 20"
(25mm x 508mm x 508mm) MERV 8 rated filter to ASHRAE 52.2-2007, for installation into a
2ft. x 4ft. (610mm x 1220mm) ceiling grid.
Duct Kit includes return air filter box with 1" duct collar, 1" duct collar for supply air, and air
block-off plates. Duct kit is supplied with a 4" x 16" x 20" (102mm x 406mm x 508mm) MERV 8 filter
(based on ASHRAE 52.2-2007)
Duct Collar Kit (no filter) includes 1" supply duct collar, a 1" return collar, and the necessary
block-off plates to make the Liebert Mini-Mate2 a ducted configuration. Filter box and filter are not
included.
Condensate Pump is field-mounted on the outside of the cabinet, wired to the unit power block and
is equipped with a discharge check valve. A secondary float is field-wired to shut down the unit upon
high condensate level. Power can be obtained from the Liebert Mini-Mate2 electrical panel.
Pre-Charged Refrigerant Line Set (R-407C) contains an insulated copper suction line and a
copper liquid line for interconnection of the indoor and outdoor sections. Available in 15-foot (4.5m)
and 30-foot (9m) sections.
Refrigerant-Line Sweat Adapter Kit contains two suction and two liquid line fittings that allow
field-supplied refrigerant piping between the evaporator and condensing unit.
A Remote Temperature and Humidity Sensor package includes sensors in an attractive case
with 30 ft. (9m) of cable. Can be wall- or duct-mounted. Remote sensors should be used when the wall
box is not located in the space to be conditioned.
Field-Installed Kits available for filter clog, smoke sensor, high-temperature sensor, electric reheat
and humidifier. The kits include installation instructions and are designed to be added to the
evaporator unit before it is installed in the ceiling. Electric reheat kits cannot be installed in units
with free-cooling.
4.1 Remote Monitoring, Autochangeover and Leak Detection Equipment
The Liebert RCM4™is a four-point, normally open, dry contact monitoring panel. One Form-C, dry
contact common alarm relay output (rated at 24 VAC, 3 Amp) is provided. Four red LEDs illuminate
on the respective alarm and the alarm buzzer is silenced by a front panel switch. The RCM4 requires
a 24VAC or 24VDC power source. Power supply is not included.
The Liebert AC4™Autochangeover Controller provides autochangeover and autosequence
control for up to four Liebert Mini-Mate2 units within a room. The Liebert AC4 will enable redundant
units in an alarm condition, balance usage and test standby units at programmed intervals. Two
common alarm relay outputs are available. A built-in LCD and RS-232 port for direct PC/terminal
connection provides two options for configuration and monitoring of the product. The Liebert AC4
requires 24VAC input power.
The Liebert AC8™is ideal for coordinated control of systems with redundant units. The Liebert AC8
enables redundant devices during an alarm condition, balances usage of devices and tests standby
devices at programmable intervals. Supports four zones and can use the 4-20mA temperature sensor
(TW420) for temperature staging in each zone. Two programmable output control relays are available
for auxiliary control such as humidity lockout. Emergency power operation input provided for device
control during an emergency. Two common alarm relay outputs are available. A built-in LCD and
RS-232 port for direct PC/terminal connection provides two options for configuration and monitoring
of the product.
NOTE
Installing the remote sensors disables the sensors included in the wall box.