Vertiv Liebert Mini-Mate2 User manual

Liebert® Mini-Mate2™
5Tons, 50&60Hz
User Manual

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TABLE OF CONTENTS
1 Important Safety Instructions 7
2 Product Model Information 9
3 Introduction 15
3.1 Designed to Match Computer and Electronic Equipment Needs—From Installation to Operation 15
4 Standard Features—5 Ton Systems 17
4.1 Evaporator Section—Split System 17
4.2 Condensing Unit Section—Split System 17
4.2.1 Indoor Centrifugal Fan Condensing Units 17
4.2.2 Outdoor Prop Fan Condensing Units 17
4.2.3 Indoor Water/Glycol Condensing Units 17
4.3 Chilled Water Units 17
4.4 System Controls 18
4.4.1 Other Standard Control Features 18
5 Optional Factory-Installed Features - Evaporator/Chilled Water Units 19
5.1 Reheat 19
5.2 Humidifier 19
5.3 Sensors 19
5.4 Switches and Motors 19
5.5 Free-Cooling 20
5.6 Optional Configurations—Prop Fan Condensing Units 20
5.7 Optional Configurations—Water/Glycol Condensing Units 21
5.8 Optional Configurations—Chilled Water Units 21
6 Ship-Loose Accessories—Field-Installed 23
6.1 Remote Monitoring, Autochangeover and Leak Detection Equipment 23
7 Site Preparation and Installation 25
7.1 Installation Considerations 25
7.1.1 Room Preparation 26
7.1.2 Location Considerations 26
7.2 Ceiling Unit Weights 28
7.3 Equipment Inspection Upon Receipt 28
7.4 Installing the Ceiling Units 28
7.4.1 Close Coupled Installations 29
7.4.2 Evaporator Air Distribution 29
7.4.3 Piping Connections and Coolant Requirements 30
7.4.4 Electrical Connections 36
7.5 Indoor Air-Cooled Centrifugal Fan Condensing Unit Installation 39
7.5.1 Location Considerations 39
7.5.2 Electrical Connections 39
7.5.3 Piping Connections 40
7.5.4 Ducting 40
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7.6 Outdoor Air-Cooled Condensing Unit Installation 44
7.6.1 Location Considerations 44
7.6.2 Piping Connections 46
7.6.3 Electrical Connections 46
7.7 Indoor Water- and Glycol-Cooled Condensing Unit Installation 47
7.7.1 Location Considerations 47
7.7.2 Electrical Connections 47
7.7.3 Piping Connections 47
7.8 Optional Equipment Piping 52
7.8.1 Free-Cooling Coil 52
7.8.2 Hot Water Reheat Coil 52
7.9 Checklist for Completed Installation 54
8 Microprocessor Control 55
8.1 Feature Overview 55
8.2 Main Menu <Menu> 56
8.3 Setpoints 57
8.4 Status 57
8.5 Active Alarms 57
8.6 Time 58
8.7 Date 58
8.8 Setback 58
8.9 Setup Operation 58
8.9.1 Restart Time Delay 59
8.9.2 C/F Degrees 59
8.9.3 Humidity Control Method 59
8.9.4 Show DIP Switch 59
8.9.5 Valve Time (for Systems With a Modulating Chilled Water Valve) 59
8.9.6 CW Flush (for Systems with a Modulating Chilled Water Valve) 60
8.10 Change Passwords 60
8.11 Calibrate Sensors 60
8.12 Alarm Enable 61
8.13 Alarm Time Delay 61
8.14 Common Alarm Enable 61
8.15 Custom Alarms 62
8.15.1 Standard Custom Alarm Messages 62
8.16 Custom Text 62
8.17 Run Diagnostics (Available On Rev 1.001.0 and higher) 63
9 System Performance Microprocessor Controls 69
9.1 Temperature Control 69
9.1.1 Cooling/Heating Required 69
9.1.2 Cooling Operation (Compressorized Direct Expansion and Chilled Water) 69
9.1.3 Heating Operation 69
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9.2 Humidity Control 70
9.2.1 Dehumidification/Humidification Required 70
9.2.2 Dehumidification Operation, Compressorized Direct Expansion (DX) Systems 70
9.2.3 Humidification Operation 70
9.3 Load Control Features 70
9.3.1 Communications 70
10 Alarms 71
10.1 Alarms: Definitions and Troubleshooting 71
10.1.1 Custom Alarms 71
10.1.2 High Head Pressure 72
10.1.3 Humidity Level 72
10.1.4 Temperature 73
10.1.5 Humidifier Problem Alarm 73
10.1.6 High Water Alarm 73
10.1.7 Loss of Power 73
10.1.8 Short Cycle 73
10.2 Optional/Custom Alarms 73
10.2.1 Change Filter 73
10.2.2 High Temperature Sensor 74
10.2.3 Smoke Sensor 74
11 System Operation, Testing and Maintenance 75
11.1 System Testing 75
11.1.1 Environmental Control Functions 75
11.1.2 Cooling 75
11.1.3 Heating 75
11.1.4 Humidification 75
11.1.5 Dehumidification 75
11.1.6 Remote Shutdown 75
11.2 Maintenance and Component Operation 76
11.2.1 Electric Panel 76
11.2.2 Filters 76
11.2.3 Blower System 76
11.2.4 Blower Removal 76
11.2.5 Refrigeration System 77
11.3 Replacement Procedures 80
11.3.1 Compressor Replacement 80
11.3.2 Electrical Failure 80
11.3.3 Steam Generating Humidifier-Operation Procedures 81
11.3.4 Humidifier Circuit Board Adjustments 83
12 Maintenance Inspection Checklist 85
13 Troubleshooting 87
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1 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.
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.
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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. Vertiv™
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.
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2 PRODUCT MODEL INFORMATION
Figure 2.1 Split system evaporators
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Figure 2.2 Air-cooled systems—indoor centrifugal condensing units
Figure 2.3 Air-cooled systems—outdoor prop fan condensing units
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