Emerson MINI-MATE2 User Manual

Precision Cooling
For Business-Critical Continuity™

Liebert® Mini-Mate2

User Manual - 5 Tons, 50 & 60Hz

™

TABLE OF CONTENTS

IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

PRODUCT MODEL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

1.1 Designed to Match Computer and Electronic Equipment Needs—From Installation

to Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.0 STANDARD FEATURES—5 TON SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

2.1 Evaporator Section—Split System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2 Condensing Unit Section—Split System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2.1 Indoor Centrifugal Fan Condensing Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2.2 Outdoor Prop Fan Condensing Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2.3 Indoor Water/Glycol Condensing Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.3 Chilled Water Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.4 System Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.4.1 Other Standard Control Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.0 OPTIONAL FACTORY-INSTALLED FEATURES - EVAPORATOR/CHILLED WATER UNITS . . . . . .9

3.1 Reheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.2 Humidifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.3 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.4 Switches and Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.5 Free-Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.6 Optional Configurations—Prop Fan Condensing Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.7 Optional Configurations—Water/Glycol Condensing Units . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.8 Optional Configurations—Chilled Water Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.0 SHIP-LOOSE ACCESSORIES—FIELD-INSTALLED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

4.1 Remote Monitoring, Autochangeover and Leak Detection Equipment. . . . . . . . . . . . . . . . . 12

5.0 SITE PREPARATION AND INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.1 Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.1.1 Room Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.1.2 Location Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.2 Ceiling Unit Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.3 Equipment Inspection Upon Receipt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.4 Installing the Ceiling Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.4.1 Close Coupled Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.4.2 Evaporator Air Distribution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.4.3 Piping Connections and Coolant Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.4.4 Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.5 Indoor Air-Cooled Centrifugal Fan Condensing Unit Installation . . . . . . . . . . . . . . . . . . . . 27

5.5.1 Location Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.5.2 Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.5.3 Piping Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.5.4 Ducting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

i

5.6 Outdoor Air-Cooled Condensing Unit Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

5.6.1 Location Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

5.6.2 Piping Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

5.6.3 Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

5.7 Indoor Water- and Glycol-Cooled Condensing Unit Installation. . . . . . . . . . . . . . . . . . . . . . 33

5.7.1 Location Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5.7.2 Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5.7.3 Piping Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5.8 Optional Equipment Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

5.8.1 Free-Cooling Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

5.8.2 Hot Water Reheat Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

5.9 Checklist for Completed Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

6.0 MICROPROCESSOR CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

6.1 Feature Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

6.2 Main Menu <Menu>. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

6.3 Setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

6.4 Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

6.5 Active Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

6.6 Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

6.7 Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

6.8 Setback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

6.9 Setup Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

6.9.1 Restart Time Delay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

6.9.2 C/F Degrees. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

6.9.3 Humidity Control Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

6.9.4 Show DIP Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

6.9.5 Valve Time (for Systems With a Modulating Chilled Water Valve) . . . . . . . . . . . . . . . . . . . . 43

6.9.6 CW Flush (for Systems with a Modulating Chilled Water Valve) . . . . . . . . . . . . . . . . . . . . . . 43

6.10 Change Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

6.11 Calibrate Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

6.12 Alarm Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.13 Alarm Time Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.14 Common Alarm Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.15 Custom Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

6.15.1 Standard Custom Alarm Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

6.16 Custom Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

6.17 Run Diagnostics (Available On Rev 1.001.0 and higher) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

7.0 SYSTEM PERFORMANCE MICROPROCESSOR CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . 50

7.1 Temperature Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

7.1.1 Cooling/Heating Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

7.1.2 Cooling Operation (Compressorized Direct Expansion and Chilled Water) . . . . . . . . . . . . . . 50

7.1.3 Heating Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

7.2 Humidity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

7.2.1 Dehumidification/Humidification Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

7.2.2 Dehumidification Operation, Compressorized Direct Expansion (DX) Systems . . . . . . . . . . 50

7.2.3 Humidification Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

7.3 Load Control Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

7.3.1 Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

8.0 ALARMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

8.1 Alarms: Definitions and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

8.1.1 Custom Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

8.1.2 High Head Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

8.1.3 Humidity Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

8.1.4 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

8.1.5 Humidifier Problem Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

8.1.6 High Water Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

8.1.7 Loss of Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

8.1.8 Short Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

8.2 Optional/Custom Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

8.2.1 Change Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

8.2.2 High Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

8.2.3 Smoke Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

9.0 SYSTEM OPERATION, 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 Remote Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

9.2 Maintenance and Component Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

9.2.1 Electric Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

9.2.2 Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

9.2.3 Blower System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

9.2.4 Blower Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

9.2.5 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

9.3.4 Humidifier Circuit Board Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

10.0 MAINTENANCE INSPECTION CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

11.0 T

ROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

FIGURES

Figure 1 Split system evaporators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Figure 2 Air-cooled systems—indoor centrifugal condensing units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Figure 3 Air-cooled systems—outdoor prop fan condensing units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Figure 4 Water/glycol-cooled systems—indoor condensing units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Figure 5 Chilled water systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 6 Wall-box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 7 Free-cooling arrangement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 8 Air-cooled systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 9 Water/glycol cooled systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

iii

Figure 10 Chilled water systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 11 Refrigerant piping diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 12 Evaporator unit dimensional data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 13 Threaded rod and hardware kit installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 14 Evaporator unit electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 15 Close coupled installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 16 Indoor air-cooled centrifugal condensing unit dimensions and pipe connections . . . . . . . . . . . . . 28

Figure 17 Indoor air-cooled centrifugal condenser electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 18 System piping with indoor or outdoor air-cooled condensing unit . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 19 Dimensions—Air-cooled systems, standard ambient outdoor condensing module . . . . . . . . . . . . 31

Figure 20 Dimensions—Air-cooled systems, high ambient and Quiet-Line condensing module . . . . . . . . . 32

Figure 21 Indoor water/glycol condensing unit dimensional data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 22 Indoor water/glycol condensing unit electrical field connections . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 23 System piping with indoor water/glycol cooled condensing unit . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 24 Optional free-cooling coil (3-way valve) on water/glycol units . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 25 Optional hot water reheat (two-way valve) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 26 Wall box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 27 Control menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Figure 28 Control board—inside evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 29 Wall box board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 30 Hot gas bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

TABLES

Table 1 System configurations—60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Table 2 System configurations—50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Table 3 Application limits, evaporator and chilled water units*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Table 4 Application limits, indoor and outdoor air-cooled condensing units . . . . . . . . . . . . . . . . . . . . . . . 14

Table 5 Application limits, indoor water/glycol cooled condensing units . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Table 6 Unit weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 7 Evaporator external static pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 8 Recommended refrigerant line sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 9 Equivalent lengths for various pipe fittings, ft (m). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 10 Pipe length and condenser elevation relative to evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 11 Refrigerant charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 12 Line charges - refrigerant per 100 ft. (30m) of Type L copper tube . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 13 Refrigerant quick connect sizes and torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 14 Weights for standard ambient outdoor condensing modules, air-cooled systems . . . . . . . . . . . . . 31

Table 15 Net weight, high ambient and Quiet-Line condensing modules, air-cooled systems . . . . . . . . . . 32

Table 16 Night and weekend setback plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Table 17 Default setpoints and allowable ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

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 Cooling and dehumidification load response of hot gas bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Table 23 Typical discharge pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Table 24 Humidifier control board DIP switch settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Table 25 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

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 properly trained and 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 high voltage. 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.

Important Safety Instructions

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, verify with a voltmeter that

power is Off and the blower, pulleys and belts have stopped moving before working in the unit
cabinet.

CAUTION

Risk of contact with hot surfaces. Can cause injury.
The 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
discharge lines, humidifiers and reheats.

1Liebert

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Mini-Mate2

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Important Safety Instructions

!

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.

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 or furniture that can be damaged by leaking
water. Install a watertight drain pan with a drain connection under the cooling unit and the
ceiling mounted water/glycol condenser unit. 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 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 for 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.

Liebert® Mini-Mate2

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PRODUCT MODEL INFORMATION

7 = R-407C DX Evaporator

MMD60E7CHELA

H = Canister Humidifier
0 = No Humidifier
R = Remote Humidifier Contact
J = Canister Humidifier

& Remote Humidifier contact

Nominal Capacity kBtuh

D = Disconnect Switch
0 = No Disconnect Switch

M = Microprocessor Control

M = Liebert Mini-Mate2

A = 460V – 3ph-60Hz
B = 575V – 3ph-60Hz
C = 208V – 3ph-60Hz
D = 230V – 3ph-60Hz
M= 380/415V – 3ph-50Hz

L = Low Static Blower, 1.5hp Motor
H = High Static Blower, 2hp Motor

E = Split Evaporator
K = Evaporator w/ Free-Cooling Coil (3-way valve)

0 = None
A = Filter Clog
B = Smoke Sensor
C = High-Temperature Sensor
D = Filter Clog & Smoke Sensor
E = Filter Clog & High-Temperature Sensor
F = Smoke Sensor & High-Temperature

Sensor

G = Filter Clog, Smoke Sensor & High

Temperature Sensor

0 = No Reheat
E = Electric Reheat
S = SCR Reheat

(N/A with Free-Cooling)

MCD65ALAH7

H = Hot Gas Bypass

Nominal Capacity kBtuh

D = Disconnect Switch
0 = No Disconnect Switch

C = Condensing Unit

M = Liebert Mini-Mate2

A = 460V – 3ph-60Hz
B = 575V – 3ph-60Hz
Y = 208/230V – 3ph-60Hz
M = 380/415V – 3ph-50Hz

7 = R-407C Refrigerant

A = Air-cooled Unit

L = 95°F Ambient Liebert Lee-Temp

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(Air)

Figure 1 Split system evaporators

Product Model Information

Figure 2 Air-cooled systems—indoor centrifugal condensing units

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Figure 3 Air-cooled systems—outdoor prop fan condensing units

PFH067A-AL7

L = 95°F (35°C) Ambient Liebert Lee-Temp

™

H = 105°F (41°C) Ambient Liebert Lee-Temp

Nominal Capacity, kBtuh

0 = Standard Sound Level
Z = Quiet-Line

PFH = Prop Fan Condensing Unit w/HGBP

A = 460V – 3ph-60Hz
B = 575V – 3ph-60Hz
Y = 208/230V – 3ph-60Hz
M = 380/415V – 3ph-50Hz

7 = R-407C Refrigerant

A = Air-Cooled Unit

- = Standard Coil
C = Coated Coil

W = Water/Glycol-Cooled Unit

MCD69W2AH7

H = Hot Gas Bypass

Nominal Capacity (kBtuh)

D = Disconnect Switch
0 = No Disconnect Switch

C = Condensing Unit

M = Liebert Mini-Mate2

A = 460V – 3ph-60Hz
B = 575V – 3ph-60Hz
Y = 208/230V – 3ph-60Hz
M = 380/415V – 3ph-50Hz

7 = R-407C Refrigerant

2 = 2-Way Std. Pressure Valve
3 = 3-Way Std. Pressure Valve
D = 2-Way High Pressure Valve
T = 3-Way High Pressure Valve

Figure 4 Water/glycol-cooled systems—indoor condensing units

Product Model Information

Liebert® Mini-Mate2

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4

Figure 5 Chilled water systems

0 = None
A = Filter Clog
B = Smoke Sensor
C = High-Temperature Sensor
D = Filter Clog & Smoke Sensor
E = Filter Clog & High-Temperature Sensor
F = Smoke Sensor & High-Temperature Sensor
G = Filter Clog, Smoke Sensor & High-Temperature Sensor

M M D 92 C 2 C H E L A

2 = 2-Way Chilled Water Valve (Motorized On/Off)
3 = 3-Way Chilled Water Valve (Motorized On/Off)
D = 2-Way Chilled Water Valve (Modulating)
T = 3-Way Chilled Water Valve (Modulating)

H =Canister Humidifier
0 = No Humidifier
R = Remote Humidifier Contact
J = Canister Humidifier &

Remote Humidifier contact

0 = No Reheat
E = Electric Reheat
H = Hot Water Reheat

C = Chilled Water

Nominal Capacity (kBtuh)

D = Disconnect Switch
0 = No Disconnect Switch

M= Microprocessor Control

M = Liebert Mini-Mate2

L = Low Static Blower, 1.5hp Motor
H = High Static Blower, 2hp Motor

A = 460V – 3ph-60Hz
B = 575V – 3ph-60Hz
C = 208V – 3ph-60Hz
D = 230V – 3ph-60Hz
M= 380/415V – 3ph-50Hz

Product Model Information

Table 1 System configurations—60 Hz

Nominal

Capacity Cooling Unit

5 Tons MMD60E MCD65A PFH067A MCD69W

5 Tons MMD92C Self Contained – Chilled Water

Table 2 System configurations—50 Hz

Nominal

Capacity Cooling Unit

5 Tons

MMD59E MCD64A PFH066A MCD68W

MMD91C Self-Contained – Chilled Water

Condensing Unit

Indoor Air-Cooled

Centrifugal Fan

Indoor Air-Cooled

Centrifugal Fan

Outdoor Air-Cooled

Propeller Fan

Condensing Unit

Outdoor Air-Cooled

Propeller Fan

5Liebert

Indoor Water/

Glycol

Indoor Remote

Water/Glycol

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Mini-Mate2

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Introduction

CUS

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1.0 INTRODUCTION

1.1 Designed to Match Computer and Electronic Equipment Needs—From Installation to Operation

Installed above the ceiling, Liebert Mini-Mate2 Precision Cooling systems control the cooling,
humidity and air distribution required by sensitive electronic equipment. A range of sizes and
configurations is available to meet varying sites’ 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 Emerson quality construction and reliable components,
guarantee satisfaction from installation through operation.

Liebert Precision Cooling

Liebert Precision Cooling systems are designed to control the environment required for computers
and other sensitive electronic equipment. The Liebert Mini-Mate2 provides complete control on an
around-the-clock basis and the high sensible heat ratio required by sensitive electronic equipment.

Easy Installation

The Liebert Mini-Mate2 is a split-system evaporator combined with an air-, water- or glycol-cooled
condensing unit or is a self-contained, chilled water unit. Each split system has thermostat-type
wiring to controls and condensing unit. Optional sweat adapters assist with field refrigerant piping.

Easy to Service

Low-maintenance components are easily accessed through removable front panels. Spare parts are
always in Emerson 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 select and display temperature and other monitored parameters.

High Efficiency

High sensible heat ratio, scroll compressor and precise microprocessor control allow the system to
operate efficiently.

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 reliability. Components
include a rugged scroll 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.

Liebert® Mini-Mate2

Location

When considering installation locations, consider that these units contain water and that water leaks
can cause damage to sensitive equipment below. Do not mount these units above sensitive equipment.
A field-supplied pan with drain must be supplied beneath cooling units and water/glycol condensers.

Do not mount units in areas where normal unit operating sound might disturb the working
environment.

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2.0 STANDARD FEATURES—5 TON SYSTEMS

2.1 Evaporator Section—Split System

The evaporator section 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 & ASTM 1338 standards. The evaporator section includes the evaporator coil, R-407C unit
charge, filter-drier, factory-mounted disconnect switch, adjustable belt-drive blower assembly and
microprocessor control with wall-mounted control box. The unit is provided with supply and return
air openings for field-supplied ducting. Evaporators can be configured with canister humidifier and/or
reheat. An indoor or outdoor condensing unit must be selected for each evaporator.

2.2 Condensing Unit Section—Split System

2.2.1 Indoor Centrifugal Fan Condensing Units

Indoor Air-Cooled Centrifugal Fan Condensing Units include scroll compressor, factory-mounted
disconnect switch, condenser coil, R-407C unit charge, belt-driven centrifugal blower assembly,
high-pressure switch, Liebert
line solenoid valve. Unit must be mounted indoors. Condensing unit is designed to use outdoor air
with temperatures ranging from -30°F to 95°F (-34°C to 35°C).

Lee-Temp™ head pressure control system, hot gas bypass and liquid-

Standard Features—5 Ton Systems

2.2.2 Outdoor Prop Fan Condensing Units

Outdoor Prop Fan Condensing Units include scroll 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).

2.2.3 Indoor Water/Glycol Condensing Units

Indoor Water/Glycol Condensing Units includes scroll compressor, R-407C unit charge,
factory-mounted disconnect, coaxial condenser, hot gas bypass, high head pressure switch and
two-way water regulating valve designed for 150psi (1034.3kPa). Condensing units can be used on
either a water or glycol cooling loop.

2.3 Chilled Water Units

Chilled Water Units are 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 & ASTM 1338 standards. Chilled water models are self-contained and include a chilled water
coil, belt-driven centrifugal blower, factory-mounted disconnect switch and two-way, slow-close
motorized valve. Design pressure is 300psi (2068kPa), 60psi (414kPa) close-off differential.

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Mini-Mate2

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2.4 System Controls

System controls include a microprocessor control board mounted in the evaporator/chilled water
unit and a wall-mounted interface with a two-line, 16-character liquid crystal display. A seven-key,
membrane keypad for setpoint/program control, unit On/Off 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 and alarm
conditions.

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 outage.

Figure 6 Wall-box

Standard Features—5 Ton Systems

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

Liebert® Mini-Mate2

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Optional Factory-Installed Features - Evaporator/Chilled Water Units

3.0 OPTIONAL FACTORY-INSTALLED FEATURES - EVAPORATOR/CHILLED WATER UNITS

3.1 Reheat

Electric Reheat includes 304/304 stainless steel finned tubular reheat elements, with high limit
safety switch.

SCR Electric Reheat uses an SCR controller and unit control software to provide full cooling with
modulating of the electric reheat elements to control air temperatures. Reheat capacity is up-sized to
offset the cooling capacity. (The SCR Electric Reheat is not available on chilled water, free-cooling or
575V units.)

Hot Water Reheat includes hot water coil, two-way solenoid valve and Y-strainer.

NOTE

This option is available only on chilled water units, but not with 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 local or national 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 local or national codes.

3.4 Switches and Motors

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 audibly and flashes a notification upon
reaching a customer setpoint.

A Factory-Installed Non-Fused Disconnect Switch allows 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.

2hp Blower Motor is available for high static applications (0.9 to 1.5 in. [23 to 38 mm] w.g.).

9Liebert

®

Mini-Mate2

™

3.5 Free-Cooling

Free­Cooling
Coil

Water/Glycol
Condens er

Field P iping

Wat er Temperature

Sensor

Liebert Mini-Mate2

Drycooler

Free-cooling option: A second
cooling coil allows the system to take
advantage of colder outdoor
temperatures and bypass compressor
operation.
When the water temperature goes
below 45°F (7°C), cooling switches
over to free-cooling operation. A
separate chilled water source can
also be used with air-cooled systems.

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 condensing units can be matched with evaporators using free-cooling coils with chilled
water sources to serve as backup cooling. When matched with a water/glycol condensing unit, a
three-way water regulating valve is recommended for the condensing unit to simplify piping to the
main supply pipes. The coil is designed for closed-loop applications using properly treated and
circulated fluid. Not available with SCR reheat options.

Figure 7 Free-cooling arrangement

Optional Factory-Installed Features - Evaporator/Chilled Water Units

NOTE

If free-cooling is applied to an open water tower, an optional copper-nickel (CuNi) coil is
required to prevent premature corrosion, or a heat exchanger must separate the tower water
from the free-cooling loop. The copper-nickel coil requires an extended lead time.

3.6 Optional Configurations—Prop Fan Condensing Units

3.7 Optional Configurations—Water/Glycol Condensing Units

Liebert® Mini-Mate2

Outdoor Prop Fan Condensing Units are also available in the following optional configurations:

• High ambient, top discharge models for catalog capacities at ambient temperatures up to 105°F
(40°C).

• Quiet-Line models for low noise level conditions (below 56 dBA) and catalog capacities for
ambient temperatures up to 95°F (35°C).

• Condenser coil(s) can be phenolic-coated for extended coil life in coastal areas.

Indoor Water/Glycol Condensing Units are also available with the following piping options:

• Two-way water reg. valve with 350 psi (2413kPa) design pressure.

• Three-way water reg. valve with 150psi (1034kPa) design pressure.

• Three-way water reg. valve with 350psi (2413kPa) design pressure.

™

10

Optional Factory-Installed Features - Evaporator/Chilled Water Units

3.8 Optional Configurations—Chilled Water Units

Chilled Water Units are also available with the following valve options:

• Three-way, slow-close, motorized chilled water valve rated for 300 psi (2068kPa) working
pressure. Valve is non-spring return.

• Two-way modulating chilled water valve, rated for 400psi (2758kPa) operating pressure,
72psi (496kPa) close-off rating. Valve is non-spring return.

• Three-way modulating chilled water valve, rated for 400psi (2758kPa) operating pressure. Valve
is non-spring return.

11 Liebert® Mini-Mate2

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4.0 SHIP-LOOSE ACCESSORIES—FIELD-INSTALLED

Filter Box includes filter box with 1" (25.4mm) duct flange connection, quantity 2, 20" x 20" x 4"
nominal (508mm x 508mm x 102mm) filters and a 1" (25.4 mm) duct flange for use on the supply air
opening. Filters are MERV 8 efficiency per ASHRAE Standard 52.2-2007.

Condensate Pump is equipped with a discharge check valve. The pump is supplied with a mounting
bracket for field-mounting onto ductwork and can be field-wired to the unit power block. A secondary
float can be field-wired to shut down the unit upon high condensate level.

Condensate Pump Mounting Bracket is available for a mounting condensate pump on the end of
the unit instead of on the duct work for easy alignment and installation of the condensate pump.

Remote Temperature and Humidity Sensors include sensors mounted in an attractive case with
30 ft. (9m) of cable. Installing the remote temperature and humidity sensor module disable the
temperature and humidity sensors mounted in the wall box.

Field-installed kits are 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.

Refrigerant-line sweat adapter kit contains two suction and two liquid-line compatible fittings
that allow use of field-supplied, interconnecting refrigerant lines.

Single Point Power Kit contains the necessary electrical components to interconnect the high
voltage sections of a close-coupled evaporator and indoor condensing unit.

Ship-Loose Accessories—Field-Installed

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 24VAC, 3A) 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
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
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.

The Liebert ENV-DO
major alarm conditions of Environmental units. The Liebert ENV-DO-ENCL1 packages one
Environmental DO interface card in its own steel enclosure and the ENV-DO-ENCL2 packages two
Environmental DO interface cards in one enclosure for installation external to the Liebert
Mini-Mate2. The self-contained kit includes an external 120VAC-to-24VAC power transformer.
Wiring harnesses are not provided. Power and communication wiring is field-provided.

The Liebert Liqui-tect

liquid using a pair of corrosion-resistant, gold-plated probes mounted in a painted, height-adjustable
enclosure. Dual Form-C, dry contact common alarm relays (rated at 24VAC, 3A) signal a leak
detected as well as loss of power and cable fault. The Liebert Liqui-tect 410 requires an external
24VAC or 24VDC power source.

Liebert LT460 Zone Leak Detection Kits include one LT460 sensor, a specified length of
LT500-xxY cable (maximum length is 100 ft [30.5m]) and a corresponding number of hold-down clips.
The Liebert LT460 requires an external 24VAC, 0.12A power source, such as EXT-XFMR or XFMR24.

™

Autochangeover Controller provides autochangeover and autosequence

™

is ideal for coordinated control of systems with redundant units. The Liebert AC8

™

interface card provides 16 discrete outputs, corresponding to status and

®

410 Point Leak Detection Sensor detects the presence of conductive

Liebert® Mini-Mate2

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12

Ship-Loose Accessories—Field-Installed

Liebert SiteScan® is a monitoring solution that gives you decision-making power to effectively

manage the equipment critical to your business.
Liebert SiteScan enables communication from Liebert Precision Cooling and Power Protection units,

as well as many other pieces of analog or digital equipment, to a front-end software package that
provides real-time status and alarms so you can react quickly to changing situations.

Liebert SiteScan is designed with flexibility for both small systems and large, complex systems such
as those in computer rooms, telecommunications facilities or industrial process control rooms.
Contact your local Emerson representative for assistance with a Liebert SiteScan system.

The NIC-ENCL1 and NIC-ENCL2 package one or two Liebert IntelliSlot

®

Web/485 Cards with
Adapters, respectively, in one steel enclosure for installation external to the Liebert Mini-Mate2. The
Liebert IntelliSlot Web/485 Card with Adapter provides communication with the Liebert
Mini-Mate2

™

via SNMP, HTTP, RTU Modbus 485 and BACnet IP. The self-contained kit includes an
external 120VAC-to-24VAC transformer as a power source. Wiring harnesses are not provided. Power
and communication wiring are field-provided.

13 Liebert® Mini-Mate2

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5.0 SITE PREPARATION AND INSTALLATION

NOTE

Before installing unit, determine whether any building alterations are required to run piping,
wiring and duct work. Carefully follow all unit dimensional drawings and refer to the
submittal engineering dimensional drawings of individual units for proper clearances.

5.1 Installation Considerations

The evaporator unit is usually mounted above the suspended ceiling in the space to be conditioned.
Ducted systems may be located in a different room. Refer to Figure 8 and Figure 9 for possible
configurations. The condensing unit may be:

• Indoor Air-Cooled Centrifugal Fan Condensing Unit mounted remotely or close coupled to the
evaporator in the ceiling space.

• Outdoor Air-Cooled Propeller Fan Condensing Unit.

• Water/Glycol Cooled Condensing Unit, mounted remotely or close coupled to the evaporator.

Table 3 Application limits, evaporator and chilled water units*

Input Voltage Range of Return Air Conditions to Unit

Min Max Dry Bulb Temperature Relative Humidity

-5% +10% 65°F to 85°F

*Unit will operate at these conditions but will not control to these extremes.

°C to 29°C)

(18

20% to 80%

Site Preparation and Installation

Table 4 Application limits, indoor and outdoor air-cooled condensing units

Input

Voltage

Min Max Min Max

-5% +10% Outdoor Prop Fan

Condensing

Condensing Unit

Indoor Air-Cooled

Centrifugal

Condensing Unit

Table 5 Application limits, indoor water/glycol cooled condensing units

Input Voltage Entering Fluid Temperature

Min Max Min Max

-5% +10% 65°F (18.3°C) * 115°F (46°C)

*Operation below 65°F (18°C) may result in reduced valve life and fluid noise.

5.1.1 Room Preparation

The room should be well insulated and must have a sealed vapor barrier. The vapor barrier in the
ceiling and walls can be a polyethylene film. Paint on concrete walls and floors should contain either
rubber or plastic.

NOTE

The single most important requirement for maintaining environmental control in the
conditioned room is the vapor barrier.

Entering Dry Bulb Air

Temperature

Units

-30°F (-34°C) 120°F (49°C)

-20°F (-29°C) 115°F (46°C)

Outside or fresh air should be kept to a minimum when tight temperature and humidity control is
required. Outside air adds to the cooling, heating, dehumidifying and humidifying loads of the site.
Doors should be properly sealed to minimize leaks and should not contain ventilation grilles.

Liebert® Mini-Mate2

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14

5.1.2 Location Considerations

!

Split System Evaporator

Supply & Return Air Ducted

Outdoor Prop Fan Condensing Unit

Split System Evaporator

Supply & Return Air Ducted

Indoor Air-Cooled Condensing Unit

Evaporator

Prop Fan

Condensing Unit

Evaporator

Centrifugal Fan

Condensing Unit

CAUTION

Risk of leaking water/glycol. Can cause equipment, furniture and building damage.
Do not mount units over equipment or furniture that can be damaged by leaking water

/glycol. Install a watertight drain pan with a drain connection under the cooling unit and
ceiling mounted water-cooled condensing unit. 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 alert people to report water flowing from the secondary drain pan.

NOTE

Do NOT mount units in areas where normal unit operating sound may disturb the working
environment.

Locate the evaporator unit over an unobstructed floor space if possible. This will allow easy access for
routine maintenance or service. Do not attach additional devices (such as smoke detectors, etc.) to the
housing, as they could interfere with the maintenance or service.

NOTE

Temperature and humidity sensors are located in the wall box. Carefully select a position
for the box where discharge air DOES NOT blow directly on the sensors.

Figure 8 Air-cooled systems

Site Preparation and Installation

15 Liebert® Mini-Mate2

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Figure 9 Water/glycol cooled systems

Split System Evaporator

Supply & Return Air Ducted

Remote Water/Glycol Condensing Unit

Evaporator

Evaporator

Cooling

Tow er

Water/Glycol

Condensing Unit

Water/Glycol

Condensing Unit

Split System Evaporator

Supply & Return Air Ducted

Remote Water/Glycol Condensing Unit

Drycooler

Chilled Water Fan Coil

Supply & Return Air Ducted

Remote Chilled Water Source

Evaporator

Figure 10 Chilled water systems

Site Preparation and Installation

5.2 Ceiling Unit Weights

Table 6 Unit weights

Cooling Units

Condensing Units lb. kg.

*Add 32 lb. (14 kg.) to units with free cooling or hot water reheat coils.

Liebert® Mini-Mate2

*

MMD60E 498 226

MMD59E 498 226

MMD92C 498 226

MMD91C 498 226

MCD65A 449 204

MCD64A 449 204

MCD69W 282 128

MCD68W 282 128

™

lb. kg

16