Vertiv Mini-Mate2 User Manual

Liebert®

Mini-Mate2™ ThermalManagementSystem

Installer/User Guide

2-ton and 3-ton Capacity, 50 and 60Hz

The information contained in this document is subject to change without notice and may not be suitable for all applications. While every precaution has been taken to ensure the accuracy and completeness of this document, Vertiv assumes no responsibility and disclaims all liability for damages resulting from use of this information or for any errors or omissions. Refer to other local practices or building codes as applicable for the correct methods, tools, and materials to be used in performing procedures not specifically described in this document.

The products covered by this instruction manual are manufactured and/or sold by Vertiv. This document is the property of Vertiv and contains confidential and proprietary information owned by Vertiv. Any copying, use or disclosure of it without the written permission of Vertiv is strictly prohibited.

Names of companies and products are trademarks or registered trademarks of the respective companies. Any questions regarding usage of trademark names should be directed to the original manufacturer.

Technical Support Site

If you encounter any installation or operational issues with your product, check the pertinent section of this manual to see if the issue can be resolved by following outlined procedures. Visit https://www.Vertiv.com/en-us/support/ for additional assistance.

Vertiv | Li ebert® Mini-Mate2™ Installer/Us er Guide

TABLE OF CONTENTS

1 Important Safety Instructions 1

1.1 Agency Listed 6

2 Nomenclature 7

2.1 Nomenclature for Evaporator and Chilled Water Units 7

2.2 Nomenclature for Split System Condensing Units 9

2.2.1 Indoor Condensing Units for Air Cooled Split Systems 9

2.2.2 Outdoor Prop Fan Condensing Units for Air Cooled Split Systems 10

2.2.3 Water/Glycol-cooled Condensing Units 11

2.3 System Configurations 12

3 Site Preparation and Equipment Handling 15

3.1 Planning Dimensions 15

3.2 Room Preparation 15

3.2.1 Duct Work Considerations for the Indoor Air Cooled Condensing Unit 15

3.3 Application Limits 16

3.4 Indoor Unit Weights 17

3.5 Location Considerations 18

3.5.1 Location Considerations for Evaporator, Indoor Condensing,andChilled WaterUnits 18

3.5.2 Location Considerations for an Outdoor Condensing Unit 19

3.6 Equipment Inspection and Handling 19

3.7 Packaging Material 19

4 Installation 21

4.1 Installing Ceiling Mounted EvaporatorsandCondensing Units 21

4.1.1 Installing Suspension Rods andMounting Ceiling Units 21

4.1.2 Close Coupled Installations forIndoorCondensingUnits 23

4.2 Installing Air Distribution Components for Evaporators 24

4.2.1 Installing a Plenum 24

4.2.2 Installing a Filter Box 24

4.2.3 Guidelines for Ducted Systems 25

5 Piping and Refrigerant Requirements 27

5.1 Fluid Piping Required 28

5.1.1 Drain Line Installation Requirements 28

5.1.2 Condensate Drain Pump Kit 30

5.1.3 Water Supply Line to the Humidifier 31

5.1.4 Chilled Water Loop Piping 31

5.1.5 Water/Glycol Loop Piping 32

5.1.6 Free Cooling Coil Piping 33

5.1.7 Hot Water Reheat Coil Piping 33

5.2 Refrigerant Piping 34

5.2.1 Piping when Condensing Unit is Above or Below Evaporator 35

5.2.2 Refrigerant Line Sizes and Equivalent Lengths 36

5.2.3 Refrigerant Charge Requirements 37

5.2.4 Field Fabricated Refrigeration Piping 39

5.2.5 Evacuation and Leak Testing Air Cooled Systems 39

5.2.6 Charging Air Cooled Systems 41

5.2.7 Field Charge Verification forAir Cooled Systems 42

5.2.8 Documenting Refrigerant Charge on AirCooled Units 42

5.2.9 Evacuation and Leak-testing Water/Glycol-cooled Systems 43

5.2.10 Charging Water/Glycol-cooled Systems 45

5.2.11 Optimizing Refrigerant Charge on Water/Glycol Units 46

5.2.12 Documenting Refrigerant Charge on Water/Glycol Cooled Units 46

6 Electrical Connection Requirements 47

6.1 Input Power Connection Requirements 48

6.2 Control Wiring Connection Requirements 49

6.2.1 Wall Box Controller Control Connections 49

6.2.2 Split-system Condensing-unit Control Connections 49

6.2.3 Water/Glycol Cooled Unit Control Connections 49

6.2.4 Additional Control Connections 49

7 Checklist for Completed Installation 51

8 Initial Start up Checks andCommissioningProcedure forWarrantyInspection 53

9 Microprocessor Control 55

9.1 Controller Operation 55

9.1.1 Powering On/Off with Wall Mounted Display 56

9.1.2 Silencing an Audible Alarm 56

9.2 Main Menu <MENU> 57

9.2.1 To Select a Menu Option 57

9.2.2 Main Menu Options 57

9.2.3 Editing Setpoints 60

9.2.4 Viewing Unit Status 60

9.2.5 Viewing Active Alarms 61

9.2.6 Setting Controller Time 61

9.2.7 Setting Controller Date 61

9.2.8 Programming Setback 61

9.2.9 Editing Setup Operation 62

9.2.10 Changing Setpoint and Setup Passwords 64

9.2.11 Calibrating Sensors and Setting Sensor Response Delay 64

9.2.12 Enabling/Disabling Alarms 65

9.2.13 Setting Alarm Delays 65

9.2.14 Activating the Common Alarm Relay 66

Vertiv | Li ebert® Mini-Mate2™ Installer/Us er Guide

9.2.15 Configuring Custom Alarms 67

9.2.16 Customizing Alarm Message Text 67

9.2.17 LCD Display Contrast 67

9.2.18 Non-Volatile Memory 67

9.2.19 Equipment Options DIP Switches 68

9.3 Running Diagnostics 68

9.3.1 Showing Test Inputs 68

9.3.2 Testing Outputs 69

9.3.3 Testing the Microcontroller 70

9.4 System Control and Performance 72

9.4.1 Temperature Control 73

9.4.2 Reheat 73

9.4.3 Humidity Control 74

9.4.4 Load Control 75

9.4.5 Monitoring 75

9.5 Alarm Notification, Acknowledgment, and Descriptions 76

9.5.1 Custom Alarms 76

9.5.2 High Head Pressure Alarm 76

9.5.3 Humidity Level Alarms 77

9.5.4 Temperature Level Alarms 77

9.5.5 High Water Alarm 77

9.5.6 Loss of Power Alarm 77

9.5.7 Short Cycle Alarm 77

9.5.8 Loss of Water Flow Alarm 78

9.5.9 Change Filter Alarm 78

9.5.10 High Temperature Alarm 78

9.5.11 Smoke Alarm 78

10 Maintenance 79

10.1 System Testing 80

10.1.1 Environmental Control Function Tests 80

10.1.2 Cooling Test 80

10.1.3 Heating Test 80

10.1.4 Humidification Test 80

10.1.5 Dehumidification Test 80

10.1.6 Smoke Sensor Test 80

10.1.7 Remote Shutdown Test 81

10.2 Filter Maintenance 81

10.3 Electric Panel Maintenance 81

10.4 Direct Drive Blower Package Maintenance 81

10.4.1 Fan Impeller and Motor Bearing Maintenance 81

iii

10.4.2 Motor Replacement 81

10.4.3 Air Distribution Inspection 81

10.4.4 Removing the Blower from the Evaporator 81

10.4.5 High Static, Belt Drive Blower Package (Option) Maintenance 82

10.4.6 Belt Maintenance 82

10.5 Electric Reheat Maintenance 82

10.6 Refrigeration System Maintenance 83

10.6.1 Refrigeration Suction Pressure 83

10.6.2 Refrigeration Discharge Pressure 83

10.6.3 Thermostatic Expansion Valve (TXV) Maintenance 83

10.6.4 Air Cooled Condensing Unit Maintenance 83

10.6.5 Hot Gas Bypass Operation and Maintenance 84

10.6.6 Coaxial Condenser Maintenance (Water/Glycol Cooled Condensers Only) 86

10.6.7 Regulating Valve Maintenance (Water/Glycol Cooled Condensers Only) 86

10.6.8 Glycol Solution Maintenance 86

10.7 Compressor Maintenance 87

10.7.1 Mechanical Failure of the Compressor 87

10.7.2 Electrical Failure of the Compressor 87

10.7.3 Replacement Compressors 88

10.7.4 Replacing a Failed Compressor 88

10.8 Steam Generating Humidifier Maintenance 88

10.8.1 Operating the Humidifier 89

10.8.2 Replacing the Canister 90

10.8.3 Circuit Board Adjustments 90

11 Preventive Maintenance Checklist 93

12 Troubleshooting 99

Appendices 103

Appendix A: Technical Support and Contacts 103

Appendix B: Submittal Drawings 105

Vertiv | Li ebert® Mini-Mate2™ Installer/Us er Guide

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 qualified personnel should move, install or service this equipment.

Adhere to all warnings, cautions, notices 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. Open all local and remote electric power-supply disconnect switches, verify with a voltmeter that power is Off and wear appropriate, OSHA-approved personal protective equipment (PPE) per NFPA 70E before working within the 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® controller 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 of the controller. The only way to ensure that there is NO voltage inside the unit is to install and open a remote disconnect switch. Refer to unit electrical schematic. Follow all local codes.

WARNING! Risk of electric shock. Can cause equipment damage, injury or death. Open all local and remote electric power supply disconnect switches and verify with a voltmeter that power is off before working within any electric connection enclosures. Service and maintenance work must be performed only by properly trained and qualified personnel and in accordance with applicable regulations and manufacturers’ specifications. Opening or removing the covers to any equipment may expose personnel to lethal voltages within the unit even when it is apparently not operating and the input wiring is disconnected from the electrical source.

WARNING! Risk of over pressurization of the refrigeration system. Can cause piping rupture, explosive discharge of high pressure refrigerant, loss of refrigerant, environmental pollution, equipment damage, injury, or death. This unit contains fluids and gases under high pressure. Use extreme caution when charging the refrigerant system. Do not pressurize the system higher than the design pressure marked on the unit's nameplate. Relieve pressure before cutting into or making connections/disconnections to the piping system. Local building or plumbing codes may require installing a pressure-relief device in the system.

Consult local building and plumbing codes for installation requirements of additional pressure-relief devices when isolation valves are field installed. Do not isolate any refrigerant circuits from over pressurization protection. The PFH condensing units include a factory installed pressure relief valve mounted on top of the receiver. The valve is rated for a maximum working pressure of 475 psig.

1 Important Safety Instructions

WARNING! Risk of contact with high-speed, rotating fan blades. Can cause injury or death. Open all local and remote electric power-supply disconnect switches, verify with a voltmeter that power is off, and verify that all fan blades have stopped rotating before working in the unit cabinet.

WARNING! Risk of electric shock. Can cause serious injury or death. The microprocessor 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 of the control. Open all local and remote electric power disconnect switches and verify with a voltmeter that power is Off before working on any component of the system.

WARNING! Risk of improper wiring, piping, moving, lifting and handling. Can cause equipment damage, serious injury or death. Installation and service of this equipment should be done only by qualified personnel, wearing appropriate, OSHA-approved PPE, who have been specially-trained in the installation of airconditioning equipment.

WARNING! Risk of improper wire and loose electrical connections. Can cause overheated wire and electrical connection terminals resulting in smoke, fire, equipment and building damage, injury or death. Use correctly sized copper wire only and verify that all electrical connections are tight before turning power On. Check all electrical connections periodically and tighten as necessary.

WARNING! Risk of ceiling collapse and heavy unit falling. Can cause building and equipment damage, serious injury or death. Verify that the supporting roof structure is capable of supporting the weight of the unit(s) and the accessories. See Indoor Unit Weights on page17, for the unit weights. Securely anchor the top ends of the suspension rods and verify that all nuts are tight.

WARNING! Risk of smoke and fire. Can cause activation of fire suppression systems, building evacuation, dispatching of fire/rescue equipment and personnel and catastrophic canister failure resulting in water leaks, equipment damage, injury or death. Using a humidifier canister that has reached the end of it’s service life can be extremely hazardous. If the canister cannot be replaced immediately at the end of life condition, turn Off the power and water supply to the humidifier and remove the canister until a replacement canister can be installed. Do not ignore humidifier problem alarms. Resetting humidifier without addressing cause may result in fire or damage due to leaking water.

CAUTION: Risk of excessive refrigerant line pressure. Can cause tubing and component rupture resulting in equipment damage and personal injury. Do not close off any field installed refrigerant-line isolation valve for repairs unless a pressure-relief valve is field- installed in the line between the isolation valve and the check valve. The pressure-relief valve must be rated 5% to 10% higher than the system-design pressure. An increase in ambient temperature can cause the pressure of the isolated refrigerant to rise and exceed the system-design pressure rating (marked on the unit nameplate).

Vertiv | Li ebert® Mini-Mate2™ Installer/Us er Guide

NOTICE

CAUTION: Risk of contact with sharp edges, splinters, and exposed fasteners. Can cause injury. Only properly trained and qualified personnel wearing appropriate, OSHA-approved PPE should attempt to move, lift, remove packaging from or prepare the unit for installation.

CAUTION: Risk of contact with hot surfaces. Can cause injury. The compressor, refrigerant discharge lines, fan motor, and some electrical components are extremely hot during unit operation. Allow sufficient time for them to cool to a touch-safe temperature before working within the unit cabinet. Use extreme caution and wear appropriate, OSHA-approved PPE when working on or near hot components.

CAUTION: Risk of contact with hot surfaces. Can cause burn injury. The humidifier canister and steam discharge lines are extremely hot during operation. Allow sufficient time for them to cool to a touch-safe temperature before handling. Use extreme caution and wear appropriate, OSHA-approved PPE when performing maintenance on the humidifier.

CAUTION: Risk of contacting caustic substances. Can cause injury. Avoid touching or contacting the gas and oils with exposed skin. Severe burns will result. Wear appropriate, OSHA-approved PPE when handling contaminated parts.

Risk of oil contamination with water. Can cause equipment damage.

Liebert®Mini-Mate2DX systems require the use of POE (polyolester) oil. POE oil absorbs water at a much faster rate when exposed to air than previously used oils. Because water is the enemy of a reliable refrigeration system, extreme care must be used when opening systems during installation or service. If water is absorbed into the POE oil, it will not be easily removed and will not be removed through the normal evacuation process. If the oil is too wet, it may require an oil change. POE oils also have a property that makes them act as a solvent in a refrigeration system. Maintaining system cleanliness is extremely important because the oil will tend to bring any foreign matter back to the compressor.

1 Important Safety Instructions

NOTICE

Risk of clogged or leaking drain lines and leaking water supply lines. Can cause equipment and building damage.

This unit requires a water drain connection. Drain lines must be inspected at start-up and periodically, and maintenance must be performed to ensure that drain water runs freely through the drain system and that lines are clear and free of obstructions and in good condition with no visible sign of damage or leaks. This unit may also require an external water supply to operate.

Improper installation, application and service practices can result in water leakage from the unit. Water leakage can result in catastrophic and expensive building and equipment damage and loss of critical data center equipment.

Do not locate unit directly above any equipment that could sustain water damage.

We recommend installing a monitored fluid-detection system to immediately discover and report coolant fluid system and condensate drain line leaks.

Risk of leaking water/glycol. 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 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. We recommend installing monitored leak detection equipment for the 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.

Vertiv | Li ebert® Mini-Mate2™ Installer/Us er Guide

NOTICE

Risk of piping system corrosion and freezing fluids. Can cause leaks resulting in equipment and very expensive building damage. Cooling coils and piping 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 and piping corrosion. The water or water/glycol solution must be analyzed by a competent local water treatment specialist before start up to establish the inhibitor and antifreeze solution requirement and at regularly scheduled intervals throughout the life of the system to determine the pattern of inhibitor depletion.

The complexity of water/glycol solution condition problems and the variations of required treatment programs make it extremely important to obtain the advice of a competent and experienced water treatment specialist and follow a regularly scheduled coolant fluid system maintenance program.

Water chemistry varies greatly by location, as do the required additives, called inhibitors, that reduce the corrosive effect of the fluids on the piping systems and components. The chemistry of the water used must be considered, because water from some sources may contain corrosive elements that reduce the effectiveness of the inhibited formulation. Sediment deposits prevent the formation of a protective oxide layer on the inside of the coolant system components and piping. The water/coolant fluid must be treated and circulating through the system continuously to prevent the buildup of sediment deposits and or growth of sulfate reducing bacteria.

Proper inhibitor maintenance must be performed in order to prevent corrosion of the system. Consult glycol manufacturer for testing and maintenance of inhibitors.

Commercial ethylene glycol, when pure, is generally less corrosive to the common metals of construction than water itself. It will, however, assume the corrosivity of the water from which it is prepared and may become increasingly corrosive with use if not properly inhibited.

NOTICE

We recommend installing a monitored fluid-detection system that is wired to activate the automatic-closure of field installed coolant fluid supply and return shut-off valves to reduce the amount of coolant fluid leakage and consequential equipment and building damage. The shut-off valves must be sized to close-off against the maximum coolant fluid system pressure in case of a catastrophic fluid leak.

Risk of frozen pipes and corrosion from improper coolant mixture. Can cause water leaks resulting in equipment and building damage.

When piping or the cooling unit may be exposed to freezing temperatures, charge the system with the proper percentage of glycol and water for the coldest design ambient temperature. Automotive antifreeze is unacceptable and must NOT be used in any glycol fluid system. Use only HVAC glycol solution that meets the requirements of recommended industry practices.

Risk of no flow condition. Can cause equipment damage. Do not leave the water/coolant fluid-supply circuit in a no flow condition. Idle fluid allows the collection of sediment that prevents the formation of a protective oxide layer on the inside of tubes. Keep unit switched On and water/coolant fluid supply circuit system operating continuously.

1 Important Safety Instructions

NOTICE

Risk of improper water supply. Can reduce humidifier efficiency or obstruct humidifier plumbing.

Do not use completely demineralized water with this unit. The water must contain minerals for the electrode principle to work.

Do not use a hot water source. It will cause deposits that will eventually block the fill-valve opening.

Risk of water backing up in the drain line. Leaking and overflowing water can cause equipment and building damage.

Do not install an external trap in the drain line. This line already has a factory installed trap inside the cabinet. Installation of a second trap will prevent drain water flow and will cause the water to overflow the drain pan.

This line may contain boiling water. Use copper or other material that is rated for handling boiling water for the drain line. Sagging condensate drain lines may inadvertently create an external trap.

Risk of doorway/hallway interference. Can cause unit and/or structure damage. The unit may be too large to fit through a doorway or hallway while on the skid. Measure the unit and passageway dimensions, and refer to the installation plans prior to moving the unit to verify clearances.

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 exterior and/or underside damage.

NOTICE

Risk of improper storage. Can cause unit damage.

Keep the unit upright, indoors and protected from dampness, freezing temperatures and contact damage.

1.1 Agency Listed

Standard 60-Hz 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.

Vertiv | Li ebert® Mini-Mate2™ Installer/Us er Guide

2 NOMENCLATURE

This section describes the model-number configuration for Liebert® Mini-Mate2 units and components.

2.1 Nomenclature for Evaporator and Chilled Water Units

Table 2.2 below describes each digit of the model number.

Table 2.1 Nomenclature Example

1 2 3 4 5 6 7 8 9 10 11 12

M M D 3 6 E N P R E D 5

Table 2.2 Nomenclature Digit Definitions for Evaporator and Chilled Water Units

Digit Description

Digits 1 and 2 = the base unit

MM = Mini-Mate2

Digit3 = Disconnect

D = Disconnect switch

Digit4 a nd 5 = Nominal Capacity

24 = 24kBtuh, 60Hzevaporator

35 = 35 kBtuh, 50Hz evaporator

36 = 36 kBtuh, 60Hz evaporator

39 = 39 kBtuh, 3-ton, 50Hz, chilled water

40 = 40 kBtuh, 3-ton, 60Hz, chilled water

2 Nomenclature

Digit6 = Cooling type

C = Chilled-water cooled

E = Split-system evaporator (See Nomenclature for Split System Condensing Units on page9.)

K = Split-system evaporator with free cooling (See Nomenclature for Split System CondensingUnitson page9.)

Digit7 = Refrigerant/Valve type

N = R-407C field supplied

2 = 2-way standard pressure chilled water valve

3 = 3-way standard pressure chilled water valve

Digit8 = Supply power

A = 460V /3ph / 60Hz(3-toncapacity only)

M = 380/415V / 3ph / 50Hz (3-ton capacity only)

P = 208/230V / 1ph / 60Hz

S = 220V / 1ph /50Hz (3-ton capacity only)

Y = 208/230V / 3ph / 60Hz(3-toncapacity only)

X = 277V / 1ph / 60Hz

Table 2.2 Nomenclature Digit Definitions for Evaporator and Chilled Water Units (continued)

Digit Description

Digit9 = Hum idification

R = Remote Humidifier Contact (without canister humidifier)

J = Canister Humidifier and Remote Humidifier Contact

Digit10 = Reheat

0 = No reheat

E = Electric reheat

S = SCR reheat (for DXevaporator without free cooling option)

H = Hot water reheat (chilled water systems only)

Digit11 = Blower type

D = Direct-drive internal blower

B = Belt-drive external blower

Digit12 = Sensor packages

N = Base package of filter-clog and high-temperature sensor

2 = Smoke sensor +Base package

4 = IS-UNITY-DP (BMS) + B ase Pack age

5 = IS-UNITY-DP (BMS) + Smoke sensor+ Base package

Vertiv | Li ebert® Mini-Mate2™ Installer/Us er Guide

2.2 Nomenclature for Split System Condensing Units

This section describes the model number configuration for Mini-Mate2 splitssystem condensing units.

2.2.1 Indoor Condensing Units for Air Cooled Split Systems

Table 2.4 below describes each digit of the model number.

Table 2.3 Indoor, Air Cooled Condensing Unit Nomenclature Example

1 2 3 4 5 6 7 8 9 10

M C D 3 6 A L A H N

Table 2.4 Nomenclature Digit Definitions for Indoor, Air Cooled Condensing Units

Digit Description

Digits 1 to 2 = the base unit

MC = Mini-Mate2 condensing unit

Digit3 = Disconnect

D = Disconnect switch

Digit4 a nd 5 = Nominal Capacity

24 = 24 kBtuh,60Hz

35 = 35 kBtuh, 50Hz

36 = 36 kBtuh, 60Hz

Digit6 = Cooling type

A = Air Cooled

Digit7 = Head-pressure control

L = Liebert® Lee-Temp™ Receiver

Digit8 = Supply power

A = 460V /3ph / 60Hz(3-toncapacity only)

M = 380/415V / 3ph / 50Hz (3-ton capacity only)

P = 208/230V / 1ph / 60Hz

S = 220V / 1ph /50Hz (3-ton capacity only)

X = 277V / 1ph / 60 Hz

Y = 208/230V / 3ph / 60Hz(3-toncapacity only)

Digit9 = Hot-gas bypass

H = Hot-gas bypass

Digit10 = Refrigerant

N = R-407C field charged

2 Nomenclature

2.2.2 Outdoor Prop Fan Condensing Units for Air Cooled Split Systems

Table 2.6 below describes each digit of the model number.

Table 2.5 Prop Fan Condensing Unit Nomenclature Example

1 2 3 4 5 6 7 8 9 10 11

P F H 0 3 7 A — P L N

Table 2.6 Nomenclature Digit Definitions for Outdoor, Prop Fan Condensing Units

Digit Description

Digits 1 to 3 = the base unit

PFH = Prop-fan condensing unitwith hot gas bypass

Digit4 = Sound level

0 = Standard

Z = Quiet-Line

Digit5 and 6 = Nominal Capacity

27 = 27 kBtuh, 60Hz

36 = 36 kBtuh, 50Hz

37 = 37 kBtuh, 60Hz

Digit7 = Cooling type

A = Air-cooled

Digit8 = Coiltype

— = Standard coil

C = Coated coil (epoxy with UVtopcoat)

Digit9 = Supply power

A = 460V /3ph / 60Hz(3-toncapacity only)

B = 575V /3ph / 60Hz(3-ton capacity only, Quiet-Line not available)

M = 380/415V / 3ph / 50Hz (3-ton capacity only)

P = 208/230V / 1ph / 60Hz

S = 220V / 1ph /50Hz (3-ton capacity only)

Y = 208/230V / 3ph / 60Hz(3-toncapacity only)

Digit10 = Ambient rating/Control

L = 95°F Ambient, Liebert® Lee-Temp™

H = 105°F Ambient, Liebert®Lee-Temp™

Digit11 = Refrigerant

N = R-407C field charged

Vertiv | Li ebert® Mini-Mate2™ Installer/Us er Guide

2.2.3 Water/Glycol-cooled Condensing Units

Table 2.8 below describes each digit of the model number.

Table 2.7 Remote, Indoor Water/Glycol Condensing Unit Nomenclature Example

1 2 3 4 5 6 7 8 9 10

M C D 3 8 W 2 A H N

Table 2.8 Nomenclature Digit Definitions for Indoor, Water/Glycol Cooled Condensing Units

Digit Description

Digits 1 to 2 = the base unit

MC = Mini-Mate2 condensing unit

Digit3 = Disconnect

D = Disconnect switch

Digit4 a nd 5 = Nominal Capacity

26 = 26 kBtuh, 2-ton, 60Hz

37 = 37 kBtuh, 3-ton, 50Hz

38 = 38 kBtuh, 3-ton, 60Hz

Digit6 = Cooling type

W = Water/Glycol-cooled

Digit7 = Head-pressure control

2 = 2-way standard-pressure fluid-regulatingvalv e

3 = 3-way standard-pressure fluid-regulating valve

D = 2-way high pressure fluid-regulating valve

T = 3-way high pressure fluid-regulatingvalv e

Digit8 = Supply power

A = 460V /3ph / 60Hz(3-toncapacity only)

M = 380/415V / 3ph / 50Hz (3-ton capacity only)

P = 208/230V / 1ph / 60Hz

S = 220V / 1ph /50Hz (3-ton capacity only)

X = 277V / 1ph / 60 Hz

Y = 208/230V / 3ph / 60Hz(3-toncapacity only)

Digit9 = Hot-gas bypass

H = Hot-gas bypass

Digit10 = Refrigerant

N = R-407C field charged

2 Nomenclature

2.3 System Configurations

The following figures show the available capacity and cooling options for the Liebert® Mini-Mate2.

Figure 2.1 Air Cooled Units

Item Description

1 Splitsystem (indoor condensingunit)with supply/return air plenum

2 Split-system (indoor condensingunit)with ducted supply/returnair

3 Split-system (outdoor condensing unit) with supply/returnair plenum

4 Split-system (outdoorcondensing unit) with ducted supply/return air

5 Indoorcondensing unit

6 Evaporator

7 Outdoor condensingunit

Vertiv | Li ebert® Mini-Mate2™ Installer/Us er Guide

Figure 2.2 Water/Glycol Cooled Units

2 Nomenclature

Item Description Item Description

Split-system glycol cooled

with supply/return air plenum

Split-system glycol cooled

with ducted supply/returnair

Split-system water-cooled

with supply/return air plenum

Split-system water-cooled

with ducted supply/returnair

6 Expansion tank

7 Pump

8 Water/glycol condensing unit

9 Evaporator

5 Drycooler 10 Cooling tower

Figure 2.3 Chilled Water Units

Item Description

1 Chilled-water cooled with supply/return air plenum

2 Chilled-water cooled withducted supply/return air

Vertiv | Li ebert® Mini-Mate2™ Installer/Us er Guide

3 SITE PREPARATION AND EQUIPMENT HANDLING

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

3.1 Planning Dimensions

The unit dimensions are described in the submittal documents included in the Submittal Drawings.

The following table lists the relevant documents by number and title.

Table 3.1 Dimension Planning Drawings

Docu ment Number Title

Split System Evaporators/Chilled Water Units

DPN000193 Evaporator/Chilled Water and Option Dimensions, All Direct Drive Blower Units

DPN000194 Evaporator/Chilled Water Dimensions, All Belt Drive Blower Units

IndoorCondensingUnits

DPN004420 Cabinet Dimensions, Air Cooled Units

DPN004421 Cabinet Dimensions, Water/Glycol Cooled Units

3.2 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 be vapor resistant.

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

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

NOTE: Temperature and humidity sensors are located in the wall box. Proper and efficient cooling requires placing the wall box where discharge air does not directly blow on the sensors.

3.2.1 Duct Work Considerations for the Indoor Air Cooled Condensing Unit

Observe the following when planning the installation of the indoor air cooled condensing unit:

Ensure a satisfactory source of clean air for the condensing unit supply and a means to discharge the hot air without allowing the supply and discharge air to mix. Consider duct work to outdoor air. Duct work for outdoor air to and from the condensing unit is optional.

The total external static pressure for the inlet and outlet ducts, including grille, must not exceed 0.5in. of water. Hood intake and duct work cross-sectional area dimensions should be equal to or greater than the area of the condensing unit intake flange.

For all duct work installation, see Guidelines for Ducted Systems on page25

3 S ite Preparation and Equipment Handling

3.3 Application Limits

Table 3.2 Application Limits for Evaporator and Chilled-water Units

Input voltage Range o f Return Air Co nditions to the U nit*

Minimum Maximum Dry Bu lb Temperature Relative Humidity

–5% +10% 65 to 85°F (18 to 29°C) 20 to 80%

*The unit will operate at these conditions, but it willnot control to these condition extremes.

Table 3.3 Application Limits for Indoor and Outdoor Air-cooled Condensing Unit

Input Voltage

Condensing Unit Type

Minimum Maximum Minimum Maximum

Entering Dry Bulb Air Temperature

115°F (48°C)standard-

–5% +10%

Outdoor Prop-fan

condensing unit

–30°F (–34°C)

ambient unit*

125°F (52°C)high-ambient

unit*

–5% +10%

Indoorair cooled condensing

unit

–30°F (–34°C) 115°F (48°C)*

*Unit capacity ratings are stated for 95°F (35°C) for standard units and 1 05°F (41°C) for PFH high-ambient units. Exceeding these rating points by 20°F (11°C) will result in lower cooling ca pacities, but will notdamage the equipment.

Table 3.4 Application Limits for Indoor Water/Glycol Cooled Condensing Unit

Input voltage E ntering fluid temperature

Minimum Maximum Minimum* Maximum

–5% +10% 65°F (18°C)* 115°F (46°C)

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

Vertiv | Li ebert® Mini-Mate2™ Installer/Us er Guide

3.4 Indoor Unit Weights

Table 3.5 Indoor Unit Weights

Model # Weight, lb (kg)

Cooling Units *

MMD24E 225 (102)

MMD35E 225 (102)

MMD36E 225 (102)

MMD39C 230 (104)

MMD40C 230 (104)

High static Blower Module 85 (39)

3 S ite Preparation and Equipment Handling

Table 3.5 Indoor Unit Weights (continued)

Model # Weight, lb (kg)

IndoorCondensingUnits

MCD24A 230 (104)

MCD35A 240 (109)

MCD36A 240 (109)

MCD26W 1 75 (79)

MCD37W 220 (100 )

MCD38W 220 (100)

*Add20 lb. (9kg) to units with free cooling or hot water reheat coils.

3.5 Location Considerations

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/glycol. Can cause equipment and building damage.

3.5.1 Location Considerations for Evaporator, Indoor Condensing,andChilled WaterUnits

The evaporator or chilled water unit is usually mounted above the suspended ceiling and must be securely mounted to the roof structure. For ducted systems, the evaporator may be located in a different room from the heat-producing equipment.

For a split system with an indoor condensing unit, the condensing unit may be:

• Installed above the suspended ceiling near the evaporator or closely-coupled with the evaporator.

• In any remote indoor area, subject to the requirements detailed in Piping when Condensing Unit is Above or

Below Evaporator on page35.

Refer to Refrigerant Line Sizes and Equivalent Lengths on page36 for maximum refrigerant line lengths.

The ceiling and ceiling supports of existing buildings may require reinforcement. Be sure to follow all applicable national and local codes.

Install the ceiling-mounting 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.

Vertiv | Li ebert® Mini-Mate2™ Installer/Us er Guide

NOTE: Temperature and humidity sensors are in the wall box. Install the wall box where discharge air DOES NOT blow directly on the sensors.

Do not install units in areas where normal unit operating sound may disturb the working environment.

When installing an air cooled or water/glycol cooled unit inside a space, ensure that national and local codes are met for refrigerant concentration limits that might vary with building type and use.

3.5.2 Location Considerations for an Outdoor Condensing Unit

For a split system with an air cooled, outdoor condensing unit, the condensing unit may be mounted on the roof or remotely in any outdoor area.

Observe the following when planning the installation of the outdoor unit:

• To ensure a satisfactory air supply, locate air cooled condensing units in an environment with clear air, away from loose dirt and foreign matter that may clog the coil.

• Condensing units must not be located in the vicinity of steam, hot air or fume exhausts or closer than 18 inches from a wall, obstruction or adjacent unit.

• Avoid areas where heavy snow will accumulate at air inlet and discharge locations.

• The condensing unit should be located for maximum security and maintenance accessibility. Avoid groundlevel sites with public access. Install a solid base, capable of supporting the weight of the condensing unit.

• The base should be at least 2in. (51mm) higher than the surrounding grade and 2 in. (51mm) larger than the dimensions of the condensing-unit base. For snowy areas, a base of sufficient height to clear snow accumulation must be installed.

• Securely attach the unit to the base using the holes provided in the unit mounting rails to prevent unit movement that might stress refrigerant piping and electrical wiring.

Before beginning, refer to Piping and Refrigerant Requirements on page27 for unit placement, piping guidelines, and refrigerant-charge requirements for your system.

The condensing unit must be located within the maximum distance from evaporator guidelines listed in 5.2.1 on page35.

3.6 Equipment Inspection and Handling

Do not uncrate the equipment until it is close to its final location. All required assemblies are banded and shipped in corrugated containers. If any damage is discovered when the unit is uncrated, report it to the shipper immediately. If any concealed damage is later discovered, report it to the shipper and to your Vertiv representative.

3.7 Packaging Material

All material used to package this unit is recyclable. Save it for future use or dispose of the material appropriately.

3 S ite Preparation and Equipment Handling

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Vertiv | Li ebert® Mini-Mate2™ Installer/Us er Guide

4 INSTALLATION

Refer to the appropriate installation procedures depending the configuration and options of your Liebert® Mini-Mate2 Thermal Management System.

4.1 Installing Ceiling Mounted EvaporatorsandCondensing Units

NOTICE

Risk of leaking water/glycol. Can cause equipment and building damage.

4.1.1 Installing Suspension Rods andMounting Ceiling Units

Refer to the Location Considerations on page18 before beginning installation. These instructions apply to evaporators, indoor air cooled condensing units, and indoor water/glycol cooled condensing units.

NOTE: Follow all national and local building, electrical and plumbing codes.

• The ceiling and ceiling supports of existing buildings may require reinforcements.

• Four 3/8-in. 16 TPI threaded suspension rods are required and field supplied.

• For units with a high-static blower module, two additional suspension rods are required. Hang the evaporator before raising/attaching the high-static blower module.

• The factory-supplied 3/8-in. 16 TPI hardware kit includes the remaining installation hardware.

• Recommended clearance between ceiling grids and building structural members is the unit’s height plus 3in. (76mm).

To install the suspension rods:

1. Install the four field supplied 3/8-in.-16 TPI threaded rods by suspending them from suitable building structural members so that they will align with the four mounting locations on the unit base.

2. Securely anchor the top ends of the suspension rods with field supplied nuts.

3. Make sure all nuts are tight and locked.

4 Installation

To lift and install the unit on the rods:

1. Using a suitable lifting device that is rated for the weight of the unit (see Indoor Unit Weights on page17), raise the unit and pass the threaded rods through the four mounting locations in the unit base.

2. Attach the threaded rods to the flanges using the plain nuts to hold the unit in place as shown in Figure 4.1

below.

3. Slowly lower the lifting device, making sure that the rods securely hold the weight of the unit.

4. Adjust the plain nuts to distribute the weight of the unit evenly by the rods, making sure that the unit does not rest on the ceiling grid and that the unit is level.

NOTE: Evaporator units must be level to properly drain condensate. This does not apply to condensing units.

5. Use the Nylock nuts to "jam" the plain nuts in place as shown in Figure 4.1 below.

Figure 4.1 Installing Threaded Rods and Hardware of Ceiling Mounted Units

Item Description Item Description

1 3/8-in. threaded rod, field supplied 7 3/8-in. fender washer

2 3/8-in. hex nut 8 3/8-in. hex nut

3 3/8-in. washer 9 3/8-in. Nylock locking nut

4 Sleeve 10 Unit base pan (reference)

5 Bracket on unit

6 Isolator

Vertiv | Li ebert® Mini-Mate2™ Installer/Us er Guide

4.1.2 Close Coupled Installations forIndoorCondensingUnits

You can mount the evaporator and indoor condensing units directly next to each other, close coupled.

Close coupled installations may take advantage of a single point power kit to allow one power feed to provide input for both evaporator and condensing units.

To Install Close Coupled Indoor Units

1. If you are using a single point power kit:

• Install the single point power box into the evaporator before assembling the condensing unit to the evaporator and before raising the unit to the ceiling.

• Route power wire flex conduit into condensing unit when raising units to ceiling.

• Refer to the instructions supplied with kit for details

2. Raise the units to the ceiling before connecting them. See Installing Suspension Rods andMounting Ceiling

Units on page21.

3. Align the four bolt holes in the condensing unit with cage nuts provided on the evaporator.

4. Insert rubber spacers and secure with hardware (field provided).

5. Align the refrigerant connections as shown in Figure 4.2 below.

6. Braze the refrigerant connections together as detailed in Refrigerant Piping on page34.

Figure 4.2 Evaporator/Condensing Unit Close Coupling Connections

4 Installation

Item Description

1 Close-coupled connections

2 Spacer between evaporator and condensing unit in close coupled installations

4.2 Installing Air Distribution Components for Evaporators

Your indoor units may include a filter box, ducting, plenums, and grilles. Refer to the appropriate installation procedures for each.

4.2.1 Installing a Plenum

The 2- and 3-ton, non-ducted evaporators can use the optional ceiling mounted plenum to provide four-way air distribution. The plenum fastens to the bottom of the evaporator. The plenum includes a 16-in.x25-in.x4-in. (406-mmx635-mmx102-mm) MERV8 filter (per ASHRAE52.2-2007).

To Install the Plenum

1. Make sure that the evaporator is mounted above the bottom of the T-bar supports with at least 30in.(762mm) clearance from the return air end to the wall (to provide clearance for replacing filter).

2. Check the contents of the plenum kit.

3. Follow the installation instructions included with the plenum kit.

NOTE: Do not operate the unit without filters installed in the return air system.

4.2.2 Installing a Filter Box

The optional filter box attaches directly to the return air opening of the evaporator. The filter box includes one MERV 8 filter (per ASHRAE 52.2-2007), 20in. x 20 in. x 4 in. (508mmx508mmx102mm).

NOTE: Do not operate the unit without filters installed in return air system.

Vertiv | Li ebert® Mini-Mate2™ Installer/Us er Guide

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