Vertiv Mini-Mate2 User Manual (2024)

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.

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TABLE OF CONTENTS

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.

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 unitweights. Securelyanchor the top ends of the suspension rods and verifythatall nuts are tight.

WARNING! Riskof smoke and fire. Can cause activation of fire suppression systems, building evacuation, dispatching of fire/rescue equipmentand personnel and catastrophic canister failure resulting in water leaks, equipmentdamage, injuryor death. Using a humidifier canister thathas reached the end of it’s service life can be extremelyhazardous. If the canister cannotbe replaced immediatelyatthe end of life condition, turn Off the power and water supplytothe humidifier and remove the canister until a replacementcanister can be installed. Donotignore humidifier problem alarms. Resetting humidifier withoutaddressing cause mayresultin fire or damage due toleaking water.

CAUTION: Riskof excessive refrigerantline pressure. Can cause tubing and componentrupture resulting in equipmentdamage and personal injury. Donotclose off anyfield installed refrigerant-line isolation valve for repairs unless a pressure-relief valve is fieldinstalled in the line between the isolation valve and the check valve. The pressure-relief valve mustbe rated 5% to10% higher than the system-design pressure. An increase in ambienttemperature can cause the pressure of the isolated refrigeranttorise and exceed the system-design pressure rating (marked on the unitnameplate).

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.

NOTICE

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.

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.

NOTICE

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.

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.

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.

NOTICE

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.

NOTICE

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.

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.

NOTICE

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.

NOTICE

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.

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 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.

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

Table 2.2 Nomenclature Digit Definitions for Evaporator and Chilled Water Units

Digit Description

Digits1 and2 = the base unit

MM = Mini-Mate2

Digit3 = Disconnect

D= Disconnectswitch

Digit4and5 = Nominal Capacity

24= 24kBtuh, 60 Hzevaporator

35 = 35 kBtuh, 50 Hzevaporator 36= 36kBtuh, 60 Hzevaporator

39= 39kBtuh, 3-ton, 50 Hz, chilledwater 40 = 40 kBtuh, 3-ton, 60 Hz, chilledwater

Digit6= Coolingtype

C= Chilled-watercooled

E= Split-system evaporator(See Nomenclature forSplitSystem CondensingUnitsonpage 9.)

K = Split-system evaporatorwithfree cooling(See Nomenclature forSplitSystem CondensingUnitsonpage 9.)

Digit7 = Refrigerant/Valve type

N = R-407Cfieldsupplied

2 = 2-way standardpressure chilledwatervalve

3 = 3-way standardpressure chilledwatervalve

Digit8= Supply power

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

M = 380/415 V/3 ph/50 Hz(3-toncapacity only)

P = 208/230 V/1 ph/60 Hz

S= 220 V/1 ph/50 Hz(3-toncapacity 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= Humidification

R = Remote HumidifierContact (without canisterhumidifier)

J = CanisterHumidifierandRemote HumidifierContact

Digit10 = Reheat

0 = No reheat

E= Electric reheat

S= SCR reheat(forDX evaporatorwithoutfree coolingoption)

H = Hotwaterreheat(chilledwatersystemsonly)

Digit11 = Blowertype

D= Direct-drive internalblower

B = Belt-drive externalblower

Digit12 = Sensorpackages

N = Base package of filter-clogandhigh-temperature sensor 2 = Smoke sensor+Base package

4= IS-UNITY-DP (BMS)+Base Package

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

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 Unitsfor 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

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

Digit Description

Digits1 to 2 = the base unit

MC = Mini-Mate2 condensingunit

Digit3 = Disconnect

D= Disconnectswitch

Digit4and5 = Nominal Capacity 24= 24kBtuh,60 Hz 35 = 35 kBtuh, 50 Hz 36= 36kBtuh, 60 Hz

Digit6= Coolingtype

A= AirCooled

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-toncapacity only)

P = 208/230 V/1 ph/60 Hz

S= 220 V/1 ph/50 Hz(3-toncapacity only)

X = 277 V/1 ph/60 Hz

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

Digit9= Hot-gasbypass

H = Hot-gasbypass

Digit10 = Refrigerant

N = R-407Cfieldcharged

2.2.2 Outdoor Prop FanCondensing Unitsfor Air Cooled Split Systems

Table 2.6 below describes each digit of the model number.

Table 2.5 Prop Fan Condensing Unit Nomenclature Example

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

Digit Description

Digits1 to 3 = the base unit

PFH = Prop-fan condensingunit with hot gasbypass

Digit4= Soundlevel

0 = Standard

Z = Quiet-Line

Digit5 and6= Nominal Capacity

27 = 27 kBtuh, 60 Hz 36= 36kBtuh, 50 Hz 37 = 37 kBtuh, 60 Hz

Digit7 = Coolingtype

A= Air-cooled

Digit8= Coiltype

— = Standardcoil

C= Coatedcoil(epoxy withUV topcoat)

Digit9= Supply power

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

B = 575 V/3 ph/60 Hz(3-toncapacity only, Quiet-Line notavailable)

M = 380/415 V/3 ph/50 Hz(3-toncapacity only)

P = 208/230 V/1 ph/60 Hz

S= 220 V/1 ph/50 Hz(3-toncapacity only)

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

Digit10 = Ambientrating/Control

L= 95°FAmbient, Liebert®Lee-Temp™

H = 105°FAmbient, Liebert®Lee-Temp™

Digit11 = Refrigerant

N = R-407Cfieldcharged

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

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

Digit Description

Digits1 to 2 = the base unit

MC = Mini-Mate2 condensingunit

Digit3 = Disconnect

D= Disconnectswitch

Digit4and5 = Nominal Capacity

26= 26kBtuh, 2-ton, 60 Hz 37 = 37 kBtuh, 3-ton, 50 Hz 38= 38kBtuh, 3-ton, 60 Hz

Digit6= Coolingtype

W= Water/Glycol-cooled

Digit7 = Head-pressure control

2 = 2-way standard-pressure fluid-regulatingvalve 3 = 3-way standard-pressure fluid-regulatingvalve D= 2-way highpressure fluid-regulatingvalve T= 3-way highpressure fluid-regulatingvalve

Digit8= Supply power

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

M = 380/415 V/3 ph/50 Hz(3-toncapacity only)

P = 208/230 V/1 ph/60 Hz

S= 220 V/1 ph/50 Hz(3-toncapacity only)

X = 277 V/1 ph/60 Hz

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

Digit9= Hot-gasbypass

H = Hot-gasbypass

Digit10 = Refrigerant

N = R-407Cfieldcharged

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

1Split system (indoorcondensingunit)with supply/return airplenum

2Split-system (indoorcondensingunit)with ductedsupply/return air

3Split-system (outdoorcondensingunit)with supply/return airplenum

4Split-system (outdoorcondensingunit)with ductedsupply/return air

5Indoorcondensingunit

6Evaporator

7Outdoorcondensingunit

Figure 2.2 Water/Glycol Cooled Units

Figure 2.3 Chilled Water Units

Item Description

1Chilled-watercooledwith supply/return airplenum

2Chilled-watercooledwith ductedsupply/return air

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

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 WorkConsiderationsfor 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

3.3 Application Limits

Table 3.2 Application Limits for Evaporator and Chilled-water Units

*The unit will operate at these conditions, but it will not control to these condition extremes.

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

*Unit capacity ratingsare statedfor95°F (35°C)forstandardunitsand105°F (41°C)forPFH high-ambient units. Exceedingthese ratingpointsby 20°F (11°C)will resultin lowercoolingcapacities, but will not damage the equipment.

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

*Operation below65°F (18°C)may result in fluidnoise andreducedvalve life.

3.4 Indoor Unit Weights

Table 3.5 Indoor Unit Weights

Table 3.5 Indoor Unit Weights (continued)

*Add20 lb. (9kg)to unitswith free coolingorhot waterreheat 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.

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.

3.5.1 LocationConsiderationsforEvaporator,IndoorCondensing, 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.

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 LocationConsiderationsfor anOutdoor 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

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.

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.

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

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 unitweights. Securelyanchor the top ends of the suspension rods and verifythatall nuts are tight.

NOTICE

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.

4.1.1 Installing SuspensionRodsand 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.

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

4.1.2 Close Coupled Installationsfor 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.

ToInstallClose Coupled IndoorUnits

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).

Figure 4.2 Evaporator/Condensing Unit Close Coupling Connections

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 Installthe 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.