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Liebert MCV
User Manual
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Vertiv Liebert MCV User Manual

Liebert® MCV
Installer/User Guide
60 Hz and 50 Hz, High Density Microchannel Condenser
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 | Lieb ert® MCV Installer/User Guide
TABLE OF CONTENTS
1 Important Safety Instructions 1
2 Nomenclature and Components 5
2.1 Liebert® MCV Model Number Nomenclature 5
2.2 Component Location 6
2.3 Product Description and Features 7
2.3.1 Control, Fan Types and Features 7
3 Pre-installation PreparationandGuidelines 9
3.1 Planning Dimensions 10
3.2 Unit Weights 10
4 Equipment Inspection and Handling 11
4.1 Packaging Material 11
4.2 Lift Points for Moving the Skid 11
4.3 Removing Shipping Panels and Brackets 12
5 Piping 13
5.1 Refrigerant Piping and Charging 13
5.1.1 Refrigerant Piping Guidelines for Air Cooled Systems 14
5.1.2 Refrigerant Charge Requirements 15
5.1.3 Additional Oil Requirements 16
5.2 System Dehydration/Leak Test 16
5.3 Charging for Condensers 16
6 Electrical Connections 17
6.1 Line Voltage Wiring 18
6.2 Wye vs. Delta Connected Power Supply 20
6.3 Low Voltage Control Wiring—CANbus Communication 20
7 Checklist for Completed Installation 21
7.1 Moving and Placing Equipment 21
7.2 Electrical Installation Checks 21
7.3 Piping Installation Checks 21
7.4 Other Installation Checks 21
8 Initial Start up Checks andCommissioningProcedure forWarrantyInspection 23
9 Troubleshooting 25
10 Control Operation 27
10.1 Liebert® EconoPhase Pumped RefrigerantEconomizer withaLiebert® DSE System 27
10.2 Overview of Operating Modes 28
10.3 Liebert®EconoPhase Operation 30
10.3.1 Liebert® EconoPhase Control 31
10.3.2 Pump Startup Routine 33
10.3.3 Switch from Compressor Operation to Pump Operation 33
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10.3.4 Switch from Pump Operation to Compressor Operation 33
10.4 Premium Efficiency Control Board and Interface 34
10.4.1 Initial Display upon Power On 35
10.4.2 Navigating the Controller Interface Main Menu 35
10.4.3 Analog Signals Menu 36
10.4.4 Active Alarms Menu 39
10.4.5 History Alarms Menu 39
11 Maintenance 43
11.1 General Maintenance 44
11.2 Condenser Cleaning 44
11.2.1 When to Clean the Condenser Coil 44
11.2.2 What to Use to Clean the Condenser Coil 44
11.2.3 Cleaning the Condenser Coil 45
11.3 Replacing the Condenser Fan 45
11.3.1 Verifing the Fan Address 51
11.4 Replacing the Premium Efficiency Control Board 52
11.4.1 Preparing to Replace the Board 52
11.4.2 Installing the Replacement Board 53
12 Preventive Maintenance Checklist 55
Appendices 59
Appendix A: Technical Support and Contacts 59
Appendix B: Submittal Drawings 61
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Vertiv | Lieb ert® MCV Installer/User 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®MCV. 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 electric shock. Can cause serious injury or death. The Liebert® iCOM™ 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 Liebert® iCOM™ 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 electric shock. Can cause serious 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 the fan motor electric connection enclosures. Fan motor controls can maintain an electric charge for 10 minutes after power is disconnected. Wait 10 minutes after power is verified as off before working within the fan electric control/connection enclosures. Use only fully trained and qualified HVAC technicians to perform maintenance on the fans.
1 Im portant Safety Instructions
1
WARNING! Risk of over pressurization of the refrigeration system. Can cause 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.
WARNING! Risk of contact with high speed rotating fan blades. Can cause serious 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 or on the fan assembly. If control voltage is applied, the fan motor can restart without warning after a power failure. Do not operate the unit with any or all cabinet panels removed.
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 who have been specially trained in the installation of air conditioning equipment and who are wearing appropriate, OSHA-approved PPE.
WARNING! Risk of improper moving, lifting, or handling of the unit. Can cause equipment damage, injury or death. Read all of the following instructions and verify that all lifting and moving equipment is rated for the weight of the unit before attempting to move, lift, remove packaging from or prepare the unit for installation. See Table 3.2 on page10, for weights.
WARNING! Risk of improper wire sizing/rating 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 electrical fire and short circuit. Can cause property damage, injury or death. Select and install the line side electrical supply wire and overcurrent protection device(s) according to the specifications on the unit nameplate(s), per the instructions in this manual and according to the applicable national, state and local code requirements. Use copper conductors only. Verify that all electrical connections are tight. Unit specific wiring diagrams are provided on each unit.
CAUTION: Risk of improper moving, lifting and handling. Can cause equipment damage or injury. Only properly trained and qualified personnel should work on this equipment. Condenser fan modules weigh in excess of 115lb(52.2kg). Use proper lifting techniques and wear appropriate, OSHA-approved PPE to avoid injury and dropping the fan module during removal. Equipment used in handling/lifting, and/or installing the fan assembly must meet OSHA requirements. Use handling/lifting equipment rated for the weight of the fan assembly. Use ladders rated for the weight of the fan assembly and technicians if used during installation. Refer to handling/lifting, and/or installation equipment operating manual for manufacturer's safety requirements and operating procedures.
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Vertiv | Lieb ert® MCV Installer/User 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 electronics housing, humidifier components, 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 exposure to harmful noise levels. Can cause hearing injury or loss. Depending on the installation and operating conditions, a sound pressure level greater than 70dB(A) may arise. Take appropriate technical safety measures. Operating personnel must wear appropriate, OSHA-approved PPE and observe all appropriate hearing-protection safety requirements.
Risk of improper power supply connection. Can cause equipment damage and loss of warranty coverage.
Prior to connecting any equipment to a main or alternate power source (for example: backup generator systems) for start up, commissioning, testing, or normal operation, ensure that these sources are correctly adjusted to the nameplate voltage and frequency of all equipment to be connected. In general, power source voltages should be stabilized and regulated to within ±10% of the load nameplate nominal voltage. Also, ensure that no three phase sources are single phased at any time.
NOTICE
NOTICE
Risk of oil contamination with water. Can cause equipment damage.
Liebert®MCV 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.
Risk of control malfunction. Can cause improper unit operation.
Verify that all low voltage electrical wiring has been performed per the schematic diagram provided and that all low voltage wiring connections are tight.
1 Im portant Safety Instructions
3
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Vertiv | Lieb ert® MCV Installer/User Guide

2 NOMENCLATURE AND COMPONENTS

This section describes the model number for Liebert® MCV units and components.

2.1 Liebert® MCV Model Number Nomenclature

Table 2.2 below describes each digit of the 25 digitconfigurationnumber. The 14 digit model number consists of the first 10 digits and last four digits of the configuration number.
Table 2.1 Liebert® MCV 25 Digit Configuration Number Example
Model # Part 1 Model Details Model # Part 2
1 2 3 4 5 6 7 8 9 1 0 11 1 2 13 14 15 16 1 7 18 19 20 21 22 23 24 25
M C V 3 3 0 E 2 A D 0 G 0 0 U 0 2 0 0 0 0 * * * *
Table 2.2 Liebert® MCV Model Number Digit Definitions
Digit Description
Digits 1 and 2 = Unit Family
MC = Microchannel Condenser
Digit3 Platform Size
V = V-coil arrangement
Digits 4-6 - Nominal Capacity, kW
330 = 330kW
440 = 440kW
Digit7 - Control/Fan Type
E = Premium c ontrol and EC fan
Digit8 - Refrigerant Circuits/System Refrigerant Type
2 = Dual refrigerantcircuit, R-410A
Digit9 - Power Supply
A = 460V /3ph / 60Hz
2 = 380V / 3ph / 60Hz
M = 380-415V / 3ph /50Hz
Digit10 - Packaging
D = Domestic, non-stackable
E = Export crating, non-stackable
Digit11 - Coil Coating
0 = None
C = E-coat (epoxy withUV topcoat)
2 N omenclature an d Componen ts
5
Table 2.2 Liebert® MCV Model Number Digit Definitions (continued)
Digit Description
Digit12 - Panel Material
G = Galvanizedsteel
Digit13 - Connection Pipe Unit of Measurement
0 = Inches (std. ACR copper)
Digit14 -Legs Included
0 = No legs (standard)
Digit15 - Agency Certification
U = CSA listed, marked with CSA c-uslogo
Digit16 -Undefined, Reserved for future use.
Digit17 - Receiver/Software Configuration
0 = Liebert® DSEsoftware, no receivers
2 = Liebert® DSEsoftware, withreceivers
Digits 1 8-21 - Undefined, Reserved for future use.
Digits 22-25 -Factory configuration number

2.2 Component Location

The unit component locations are described in the submittal documents included in Submittal Drawings on page61.
The following table lists the relevant documents by number and title.
Table 2.3 Heat Rejection Skid Component Location Drawings
Docu ment Number Title
DPN003888 Component Location Diagram, MCV330 +EconoPhase + Base Assembly
DPN003872 Component Location Diagram MCV330 (2) + EconoPhase (2) + Base Assembly
DPN00425 Component Location Diagram MCV440 +EconoPhase + Base Assembly
DPN004260 Component Location Diagram MCV440 (2)+ EconoPhase +Base Assembly
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Vertiv | Lieb ert® MCV Installer/User Guide

2.3 Product Description and Features

The Liebert® MCV condenser is a direct drive EC fan type, air cooled heat rejection unit suitable for mounting outdoors. It provides heat rejection for two separate refrigeration circuits, matches the heat rejection capacity corresponding with the outdoor ambient temperature and with each corresponding compressor heat rejection requirements. Constructed with a galvanized steel frame, galvanized steel panels, and aluminum microchannel coil, the unit is quiet and corrosion resistant. The condenser is quickly and easily installed, because all internal wiring is completed at the factory with only electrical connections to be made at the job site. All electrical connections and controls are enclosed in an integral, weatherproof section of the condenser.
Figure 2.1 Liebert® MCV Heat Rejection Skid

2.3.1 Control, Fan Types and Features

Premium Efficiency Control/EC Fan
Premium Efficiency Controls and EC fans are matched to provide superior system energy efficiency. The premium control board allows CANbus communication with the indoor unit’s Liebert®iCOM™ control. This communication feature provides compressor run signals, condenser operating mode changes, condenser alarm monitoring, simplified system charging procedures and outdoor temperature monitoring.
The Premium Efficiency Control board on a Liebert®MCV controls EC fans on the same circuit to the same speed to maintain refrigerant head pressure in DX mode and refrigerant temperature in EconoPhase mode.
2 N omenclature an d Componen ts
7
Anti-Freezing Operation
The EC fans must be operated periodically in cold weather to reduce the possibility of lock up due to ice and snow accumulation. During periods of fan inactivity and outdoor temperatures below 35°F (1.6°C), the EC fans will spin for at least 30 seconds every 15 minutes at 60% of the maximum fan speed.
Surge Protective Device
An optional Surge Protective Device (SPD) can be field wired to protect the condenser from power surges that threaten sensitive equipment. The condenser’s electrical panel provides a terminal block to allow the SPD to be wired in parallel with the high voltage power. An additional low voltage terminal block is provided on condensers to allow monitoring of the SPD alarm circuit.
ASCO Series 420 surge protective device provides 50kA per mode of surge current protection. An illuminated green LED indicates the SPD is on and operating properly. An illuminated red LED indicates that the device may require replacement.
When both LEDs are off, there is no power to the condenser, either from a power failure or because the condenser disconnect is in the off position.
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Vertiv | Lieb ert® MCV Installer/User Guide
3 PRE-INSTALLATION PREPARATIONANDGUIDELINES
The unit dimensions, pipe connection locations, and piping schematics are described in the submittal documents included in the Submittal Drawings on page61.
• Install the condenser in a location offering maximum security and access for maintenance.
• Avoid ground level sites with public access and areas prone to heavy snow or ice accumulations.
• To ensure adequate air supply, we recommend that condensers be installed in an area with clean air, away from loose dirt and foreign matter that might clog the coil. In addition, condensers should be located no closer than 3 ft. (1m) from a wall, obstruction or adjacent unit.
• For roof installation, mount the condenser on suitable curbs or other supports in accordance with local codes.
• Locations that require additional coil-corrosion protection, such as coastal regions, heavy industrial, or agricultural air pollution, should specify coils with the optional epoxy e-coat.
• Condensers must not be installed in a pit.
• Condensers must be installed on a level surface to ensure proper refrigerant flow.
• The Liebert® MCV heat rejection skid cannot be installed below the evaporator.
• The DA125 through DA250 are used with a Liebert® MCV heat rejection skid with receiver tanks. For this system, the outlet of the receivers on the outdoor Liebert® MCV heat rejection skid must be higher than the elevation of the electronic (EEV) valves inside of the indoor unit. If the vertical height of the receiver outlet is greater than 60 ft. (18.3m) above the EEV, consult the factory. Refer to DPN003965 in Submittal Drawings on page61.
• The DA265 is used with a Liebert® MCV heat rejection skid without receiver tanks. For these systems, the bottom of the condenser coil on the outdoor Liebert® MCV heat rejection skid must be higher than the elevation of the EEVs inside of the indoor unit. If the vertical height between the condenser coil bottom and the EEV is greater than 60 ft. (18.3m), consult the factory. Refer to DPN005207 in Submittal Drawings on page61.
• Condensers must be installed in vertical airflow orientation to maintain the NEMA 3R rating of the electrical box.
3 Pre-install ation Preparationan dGuideli nes
9

3.1 Planning Dimensions

The condenser dimensions are described in the submittal documents included in the Submittal Drawings on page61. Condensers mounted above and below the relative elevation of the indoor unit must follow the guidelines found in the submittal drawings listed in the table below.
The following table lists the relevant documents by number and title.
Table 3.1 Dimension Planning Drawings
Docu ment Number Title
Heat Rejection Skid Dimensions
DPN003889 Cabinet and Anchor Dimensional Data MCV330 +EconoPhase + Base Assembly
DPN003875 Cabinet and Anchor Dimensional Data MCV330 (2) + EconoPhase (2) + Base Assembly
DPN004259 Cabinet and Anchor Dimensional Data MCV440 + EconoPhase +Base Assembly
DPN004261 Cabinet and Anchor Dimensional Data MCV440 (2)+ EconoPhase (2)+ Base Assembly
Condenser Elevation Above/Below Unit
DPN003965 Air Cooled Piping Schematic Liebert®MCV Mounted Above Liebert® DA125-D250
DPN005207 Air CooledPiping Schema tic Liebert® MCV MountedAbove Liebert® DA265

3.2 Unit Weights

Table 3.2 Liebert® MCV Heat Rejection Skid with EconoPhase Approximate Weights
Model
MCV330+PRE with Receiver 6 1
MCV330+PRE with Receiver 12 2
MCV440+PRE with Receiver 8 1
MCV440+PRE with Receiver 16 2
MCV440 + P RE without Receiver 8 1
MCV440 + P RE without Receiver 16 2
Numb er of Fans
on Heat Rejection Skid
Numb er of MCV /PRE Pairs
onHeat Rejection Skid
Dom estic Shipp ing
Weight lb
(kg)
5,00 0
(2,268)
10, 000
(4,535)
5,900
(2,676)
11,580
(5,252)
5,900
(2,676)
11,580
(5,252)
Dry Weight, lb (kg)
4,980
(2,258)
9,980
(4,526)
5,880
(2,667)
11,560
(5,243)
5,780
(2.621)
11,360
(5,152)
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Vertiv | Lieb ert® MCV Installer/User Guide

4 EQUIPMENT INSPECTION AND HANDLING

WARNING! Risk of improper moving, lifting, or handling of the unit. Can cause equipment damage, injury or death. Read all of the following instructions and verify that all lifting and moving equipment is rated for the weight of the unit before attempting to move, lift, remove packaging from or prepare the unit for installation. See Table 3.2 on page10
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.
NOTICE
Risk of improper lifting. Can cause equipment damage. Make sure that the spreader bars are wider than the unit. If the spreader bars are too short, the slings may crush the unit.
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. Keep the unit upright, indoors and protected from dampness, freezing temperatures and contact damage.
Upon arrival of the unit and before unpacking:
• Verify that the labeled equipment matches the bill of lading.
• Carefully inspect all items for visible or concealed damage.
• Report damage immediately to the carrier and file a damage claim with a copy sent to Vertiv or to your sales representative.

4.1 Packaging Material

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

4.2 Lift Points for Moving the Skid

Refer to the appropriate submittal drawings to locate the lift points for your heat rejection skid located in the Submittal
Drawings on page61.
• Use the indicated lifting points to lift the unit.
• Use spreader bars and/or shimmed blocks to prevent external damage.
• Lift the unit level. Tilting or twisting can damage internal components.
• Use the proper rigging equipment and make sure that attachment and lifting at the designated points is vertical.
4 Equipmen t Inspection and Hand ling
11
The following table lists the submittal documents by title and number.
Table 4.1 Heat Rejection Skid Drawings
Document Number Title
DPN003882 Cabinet Lifting Points MCV330 + EconoPhase + Base Assembly
DPN003883 Cabinet Lifting Points MCV330 (2) + EconoPhase (2) + Base Assembly
DPN004256 Cabinet Lifting Points MCV440 + EconoPhase + Base Assembly
DPN004263 Cabinet Lifting Points MCV440 (2) +EconoPhase (2) +Base Assembly

4.3 Removing Shipping Panels and Brackets

Shipping panels and securing brackets are located on each end of the unit. Before operating the unit, remove the panels and brackets from both ends of the unit, Figure 4.1 below.
Figure 4.1 Shipping Panels and Securing Brackets to Remove
Item Description
1 4 panels on each end, 8 total.
2 3 brackets on each end, 6 total.
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Vertiv | Lieb ert® MCV Installer/User Guide

5 PIPING

All refrigeration connections to the unit are sweat copper. Factory installed piping brackets must not be removed. Field installed piping must be installed in accordance with local codes and must be properly assembled, supported, isolated and insulated.
Refer to specific text and to the submittal documents included in Submittal Drawings on page61, for other unit specific piping requirements.
The following tables list the relevant documents by number and title.
Table 5.1 Piping General Arrangement Drawings
Docu ment Number Title
DPN004476 Piping Schematic DA125, DA150, and DA250 with Liebert®MCV
DPN005206 Piping Schematic DA265 with Liebert® MCV
Table 5.2 Piping Arrangements Liebert® MCV Condenser and Liebert® EconoPhase Pump Locations
Docu ment Number Title
DPN003965 Air Cooled PipingSchematic Liebert®MCV Mounted Above Liebert® DA125-D250
DPN005207 Air Cooled Piping Schematic Liebert® MCV Mounted Above Liebert®DA265
Table 5.3 Piping Connection Drawings
Docu ment Number Title
DPN003887 Primary Connection Locations MCV330 +EconoPhase + Base Assy. 460V and 575v
DPN004954 Primary Connection Locations MCV330 + EconoPhase + Base Assy. 380V and 415V
DPN004953 Primary Connection LocationsMCV330 (2)+ EconoPhase +Base Assy. 380V and 415V
DPN003878 Primary Connection Locations MCV330 +EconoPhase (2) +Base Assy. 460V and 575V
DPN004257 Primary Connection Locations MCV440 +EconoPhase + Base Assembly
DPN004262 Primary Connection Locations MCV440 (2) + EconoPhase (2) + Base Assembly

5.1 Refrigerant Piping and Charging

WARNING! Risk of over pressurization of the refrigeration system. Can cause 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.
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.
5 Pip ing
13
NOTICE
Risk of oil contamination with water. Can cause equipment damage.
Liebert®MCV 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.
Table 5.4 System Refrigerant Pressures
Maximum Design Operating Pressure (High Side) 530 psig 3655 kPa N oted on the unit serial tag

5.1.1 Refrigerant Piping Guidelines for Air Cooled Systems

• Field installed interconnecting piping should be properly selected based on local codes and unit labeling.
• Air cooled units and condensers ship with an inert gas holding charge. Do not vent the charge until all refrigerant piping is in place, ready for connection to the unit and condenser.
• Use copper piping with a brazing alloy with a minimum temperature of 1350°F (732°C), such as Sil-Fos. Avoid soft solders, such as 50/50 or 95/5.
• Use a flow of dry nitrogen through the piping during brazing to prevent formation of copper oxide scale inside the piping. When copper is heated in the presence of air, copper oxide forms. POE oils will dissolve these oxides from inside the copper pipes and deposit them throughout the system, clogging filter driers and affecting other system components.
• A pure dry nitrogen flow of 1-3 ft3/min (0.5-1.5 l/s) inside the pipe during brazing is sufficient to displace the air. Control the flow using a suitable measuring device.
• Ensure that the tubing surfaces to be brazed are clean and that all burrs have been removed from the ends of the tubes.
• Ensure that all loose material has been cleaned from inside the tubing before brazing.
• Protect all refrigerant line components within 18in. (460mm) of the brazing site by wrapping them with a wet cloth or with a suitable heat-sink compound.
• Isolate piping from building using vibration isolating supports.
• The Liebert® MCV heat rejection skid cannot be installed below the evaporator.
• The DA125 through DA250 are used with a Liebert® MCV heat rejection skid with receiver tanks. For these systems, the outlet of the receivers on the outdoor Liebert® MCV heat rejection skid must be higher than the elevation of the electronic expansion valves (EEV0 inside of the indoor unit. If the vertical height of the receiver outlet is greater than 60 ft. (18.3m) above the EEV, consult the factory. Refer to DPN003965 in Submittal
Drawings on page61.
• The DA265 is used with a Liebert® MCV heat rejection skid without receiver tanks. For these systems, the bottom of the condenser coil on the outdoor Liebert® MCV heat rejection skid must be higher than the elevation of the EEVs inside of the indoor unit. If the vertical height between the condenser coil and the EEV is greater than 60 ft (18.3m), consult the factory. Refer to DPN005207 in Submittal Drawings on page61.
• Install traps on hot gas (discharge) lines at the base of the vertical risers over 5 ft. (1.5m) and then for vertical risers over 25 ft (7.6m). Install a trap in 20 ft. (6m) increments or evenly divided over the vertical rise. The DA250 and DA265 each have piping out of the top of the unit with internally installed traps on the hot gas lines.
• Consult factory for piping lengths exceeding the lengths in Table 5.5 on the facing page.
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Vertiv | Lieb ert® MCV Installer/User Guide
Table 5.5 Piping Lengths
Indoo r Unit Maximum Actual Leng th Maximum Equivalent Length
DA250, DA265 200 ft. (61m) 300 ft. (91m)
DA125, DA150, DA165 300 ft. (91m) 450(137.2m)
• Pitch horizontal hot gas piping down at a minimum rate of 1/2in.per 10ft (42mm per 10m) so that gravity will aid in moving oil in the direction of refrigerant/oil flow.
• Keep piping clean and dry, especially on units with R-410A refrigerant.
• Avoid piping runs through noise sensitive areas.
• Do not run piping directly in front of discharge air stream.
• Refrigerant oil – do not mix oil types. Consult the indoor-unit installation/user guide for refrigerant type and oil requirements.
Refer to ASHRAE Refrigeration Handbook for general, good practice refrigeration piping. The indoor cooling unit has a factory installed high pressure safety switch in the high side refrigerant circuit. A fusible plug is installed in each Liebert® DSE receiver.
NOTE: Liebert® DSE systems require all indoor and outdoor field refrigerant piping to be insulated 1/2 in. minimum. All outdoor insulation must be UV and ozone resistant.
• Refer to the indoor unit's Installer/User Guide, for recommended refrigerant piping sizes based on equivalent pipe lengths.
• Refer to the indoor unit's Installer/User Guide for the refrigerant-charge requirements of the system.

5.1.2 Refrigerant Charge Requirements

Table 5.6 Approximate R-410A Refrigerant Required per Circuit for MCV Heat Rejection Skid
Heat Rejection Skid System No . Circuit No.
1
MCV330 Single skid with (1) PRE unit 1
2
1
MCV440 Single skid with (1) PRE unit 1
2
with or witho ut Receivers lb (kg)
Charge per Circuit
52
(24.6)
62
(28.1)
5 Pip ing
15
Table 5.6 Approximate R-410A Refrigerant Required per Circuit for MCV Heat Rejection Skid (continued)
Heat Rejection Skid System No . Circuit No.
MCV330 Dual skid with (2) PRE units
MCV440 Dual skid with (2) PRE units
*The heat rejection skid contains:
• MCV condensers.
• DSE receivers, when used with a DA125 through DA250 system.
• EconoPhase (PRE)units, and all internal piping.
Liebert®DSE receivers are not used with a DA265 system.
1
2
1
2
1
2
1
2
1
2 62
1
2
Charge per Circuit
with or witho ut Receivers lb (kg)
52
(24.6)
(28.1)

5.1.3 Additional Oil Requirements

Refer to the indoor unit's Installer/User Guide to determine if additional oil is required for each circuit. The need for additional oil is affected by compressor type, piping lengths, receiver, and total refrigerant charge.

5.2 System Dehydration/Leak Test

Refer to the indoor unit's Installer/User Guide for the leak check and evacuation procedures for the entire thermal­management system. Refer to the section that refers to the winter control system used on the condenser.

5.3 Charging for Condensers

Refer to the Liebert® DSE Installer/User Guide for the leak check and evacuation procedures for the entire thermal­management system.
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6 ELECTRICAL CONNECTIONS

Line voltage electrical service is required for all models. Electrical service must conform to national and local electrical codes. Refer to equipment nameplate regarding wire size and circuit protection requirements. Refer to electrical schematic when making connections. Refer the appropriate submittal drawing, listed in Table 6.1 on the next page, for electrical service entrances into unit.
A manual electrical disconnect switch should be installed in accordance with local codes and distribution system. Consult local codes for external disconnect requirements.
All internal wiring is completed at the factory.
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 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 who have been specially trained in the installation of air conditioning equipment and who are wearing appropriate, OSHA-approved PPE.
WARNING! Risk of improper wire sizing/rating 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.
NOTICE
Risk of improper power supply connection. Can cause equipment damage and loss of warranty coverage.
Prior to connecting any equipment to a main or alternate power source (for example: backup generator systems) for start up, commissioning, testing, or normal operation, ensure that these sources are correctly adjusted to the nameplate voltage and frequency of all equipment to be connected. In general, power source voltages should be stabilized and regulated to within ±10% of the load nameplate nominal voltage. Also, ensure that no three phase sources are single phased at any time.
NOTE: Use copper wiring only. Make sure that all connections are tightened to the proper torque mentioned on the component.
The electrical connections are described in the submittal documents included in the Submittal Drawings on page61.
6 Electrical Connections
17
The following table lists the relevant documents by number and title.
Table 6.1 Electrical Field Connection Drawings
Docu ment Number Title
DPN003879 Electrical Panel Layout MCV330
DPN004212 Electrical Panel Layout, MCV440 Condenser Section
DPN003887 Primary Connection Locations MCV330 +EconoPhase + Base Assy. 460V and 575v
DPN003878 Primary Connection Locations MCV330 +EconoPhase + Base Assy. 460V and 575V
DPN004954 Primary Connection Locations MCV330 + EconoPhase + Base Assy. 380V and 415V
DPN004953 Primary Connection Locations MCV330 (2)+EconoPhase + Base Assy. 380V and 415V
DPN004257 Primary Connection Locations MCV440 + EconoPhase + Base Assembly
DPN004262 Primary Connection Locations MCV440 (2) +EconoPhase (2) +Base Assembly
DPN003886 CANbus a nd Interlock ConnectionsLiebert®MCV + Liebert® EconoPhase + Base Assy.

6.1 Line Voltage Wiring

WARNING! Risk of electrical fire and short circuit. Can cause property damage, injury or death. Select and install the line side electrical supply wire and overcurrent protection device(s) according to the specifications on the unit nameplate(s), per the instructions in this manual and according to the applicable national, state and local code requirements. Use copper conductors only. Verify that all electrical connections are tight. Unit specific wiring diagrams are provided on each unit.
Risk of improper power supply connection. Can cause equipment damage and loss of warranty coverage.
Prior to connecting any equipment to a main or alternate power source (for example: backup generator systems) for start up, commissioning, testing, or normal operation, ensure that these sources are correctly adjusted to the nameplate voltage and frequency of all equipment to be connected. In general, power source voltages should be stabilized and regulated to within ±10% of the load nameplate nominal voltage. Also, ensure that no three phase sources are single phased at any time.
NOTE: For acceptable and unacceptable power supplies, see Wye vs. Delta Connected Power Supply on page20.
Condenser rated voltage should be verified with available power supply before installation. Refer to the unit’s electrical schematic and serial tag for specific electrical requirements.
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Vertiv | Lieb ert® MCV Installer/User Guide
Liebert® MCV condenser power connections are provided for three phase wires and one earth ground wire. Line voltage electrical service is required for all condensers at the location of the condenser. The voltage supply to the condenser may not be the same voltage supply as required by the indoor unit. Consider using a UPS on both indoor cooling units and MCV condensers to maintain uninterrupted cooling capability. Refer to the unit’s serial tag for specific condenser electrical requirements. A unit disconnect is standard. However, a site disconnect may be required by local code to isolate the unit for maintenance. Route the supply power to the site disconnect switch and then to the unit. Route the conduit to the knockout provided in the bottom right end of the electrical control enclosure. Connect the earth ground wire lead to the marked earth ground connection terminal provided near the factory installed disconnect switch per the appropriate drawing in the
Submittal Drawings on page61.
NOTE: A separate neutral wire does not need to be run to the Liebert® MCV Condenser.
Table 6.2 Liebert® MCV Condenser Only Electrical Data, 3 Phase
Model Voltage FLA WSA OPD
2 = 380V / 60Hz 21.0 21.9 25
MCV330
MCV440
A = 460V /60Hz 1 6.8 17.5 20
M = 380-415V / 50Hz 21. 0 21 .9 25
G = 415V / 50Hz 21 .0 21. 9 25
2 = 380V / 60Hz 28.0 28.9 30
A = 460V /60Hz 22. 4 23.1 25
M = 380-415V / 50Hz 28.0 28.9 30
G = 415V / 50 Hz 28.0 28.9 30
Table 6.3 Liebert® Heat Rejection Skid Electrical Data, 3 Phase
Model Voltage FLA WSA OPD
2 = 380V / 60Hz 29.4 30.5 35
MCV330 + PR1 25
MCV330 + PR200
A = 460V /60Hz 23.8 24.7 25
G = 415V / 50Hz 28.4 29.3 30
B = 575V /60Hz 19.0 1 9.7 30
2 = 380V / 60Hz NA NA NA
A = 460V /60Hz 21.4 22. 1 25
G = 415V / 50Hz N/A N/A N/A
FLA = Full Load Amps; WSA = Wire Size Amps; OPD = Ma ximum Ov ercurrent Protection Device.
Source: DPN005045 Rev . 1
6 Electrical Connections
B = 575V /60Hz N/A N /A N /A
2 = 380V / 60Hz 36.4 37.5 40
A = 460V /60Hz 29.4 30.3 35
MCV440 + P RE
G = 415V / 50Hz 35.4 36.3 40
B = 575V /60Hz 23.5 24.2 35
19
NOTE: Heat rejection skids with 12 or 16 fans contain two 3 phase connection boxes, and each box requires a separate supply input per Table 6.3 on the previous page.

6.2 Wye vs. Delta Connected Power Supply

Acceptable Power Supplies—380V to 460V Nominal Units
• 380V wye with solidly grounded neutral and 220V line to ground
• 480V wye with solidly grounded neutral and 277V line to ground
• Wye with high resistance (or impedance) ground
• Delta with corner ground
Unacceptable Power Supplies
• Delta without ground or with floating ground
• Delta with grounded center tap

6.3 Low Voltage Control Wiring—CANbus Communication

NOTICE
Risk of control malfunction. Can cause improper unit operation.
Verify that all low voltage electrical wiring has been performed per the schematic diagram provided and that all low voltage wiring connections are tight.
CANbus communication and interlock wiring are required between the indoor and the outdoor units. CANbus cables are supplied by others to connect the indoor unit to the outdoor condenser. No special considerations are required when the total external cable connection between the indoor unit and outdoor unit is less than 450ft(137m). A CANbus isolator is required for total external cable connections longer than 450ft(137m) but less than 800ft(243m).
The control wiring connections are described in the submittal documents included in the Submittal Drawings on page61.
The following tables list the relevant documents by number and title.
Table 6.4 CANbus Communication Connection Drawings
Docu ment Number Title
DPN003886 CANbus and Interlock Connections between Unit and Condenser
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Vertiv | Lieb ert® MCV Installer/User Guide

7 CHECKLIST FOR COMPLETED INSTALLATION

7.1 Moving and Placing Equipment

1. Unpack and check received material.
2. Proper clearance for service access has been maintained around the equipment.
3. Equipment is level and mounting fasteners are tight.

7.2 Electrical Installation Checks

1. Line voltage connected and matches equipment nameplate.
2. Power line circuit breakers or fuses have proper ratings for equipment installed.
3. CANbus communication and interlock wiring connections completed between indoor cooling unit and condenser.
4. All internal and external high and low voltage wiring connections are tight.
5. Confirm that unit is properly grounded to an earth ground.
6. Control transformer setting matches incoming power.
7. Electrical service conforms to national and local codes.
8. Verify that the condenser is not connected to an unacceptable power supply, see Wye vs. Delta Connected
Power Supply on page20.
9. Verify that the CANbus wiring, CANbus END of Line jumper position, and the CANbus Device Address DIP Switch setting are correct according to the application at the job site.
10. Verify that terminals 70, 71, (and 230 when applicable) are used and properly wired for interlock wiring, particularly on systems that use two condensers for one indoor unit.

7.3 Piping Installation Checks

1. Piping completed to corresponding indoor cooling unit refrigeration circuit.
2. Piping is leak checked, evacuated and charged with specified refrigerant.
3. Additional refrigerant oil is added per circuit, if required.
4. Piping is properly sized, sloped, and trapped for proper oil return.
5. Check piping inside and outside of equipment for proper support and adequate spacing to prevent rub through or chafing.

7.4 Other Installation Checks

1. Installation materials and tools have been removed from equipment (literature, shipping materials, construction materials, tools, etc.).
2. Locate blank start up sheet, ready for completion by installer or startup technician.
7 Ch ecklist for Completed Installation
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8 INITIAL START UP CHECKS ANDCOMMISSIONINGPROCEDURE FORWARRANTYINSPECTION
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 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 who have been specially trained in the installation of air conditioning equipment and who are wearing appropriate, OSHA-approved PPE.
WARNING! Risk of contact with high speed rotating fan blades. Can cause serious 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 or on the fan assembly. If control voltage is applied, the fan motor can restart without warning after a power failure. Do not operate the unit with any or all cabinet panels removed.
CAUTION: Risk of exposure to harmful noise levels. Can cause hearing injury or loss. Depending on the installation and operating conditions, a sound pressure level greater than 70dB(A) may arise. Take appropriate technical safety measures. Operating personnel must wear appropriate, OSHA-approved PPE and observe all appropriate hearing-protection safety requirements.
• Confirm that all items on Checklist for Completed Installation on page21 have been done.
• Locate the “Liebert® MCV Warranty Inspection Check Sheet” in the unit’s electric panel. (PSWI-8542-408CO).
• Complete the “Liebert® MCV Warranty Inspection Check Sheet” during start-up. (PSWI-8542-408CO).
• Forward the completed “Liebert® MCV Warranty Inspection Check Sheet” to your local sales office. This information must be completed and forwarded to validate warranty.
• Contact your local sales representative or technical support if you have any questions or problems during unit start-up and commissioning. Visit https://www.Vertiv.com/en-us/support/ or call 1-800-543-2778 for contacts.
8 Initial S tart up Checks and Commissi oning Procedure forWarrantyIns pection
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9 TROUBLESHOOTING

When an EconoPhase unit triggers an alarm, please refer to the Liebert® EconoPhase Installer/User Guide available on the product page at www.Vertiv.com.
Table 9.1 Troubleshooting MCV Condenser Section
Symptom Possible cause Ch eck or Remedy
No power to condenser. Check voltage at input terminal block.
Condenser will not start
Low discharge pressure
High discharge pressure
SPD green and red LEDs are extinguished
SPD red LED is illuminated
Circuit breaker or fuse for low voltage transformer in condenser is tripped.
No low voltage signal to/from indoor unit.
Faulty head pressure control valve or premium efficiency control board.
Dirty condenser f ins. Clean coil.
Condenser fans not operating.
High refrigerant charge Check refrigerant charge.
No voltage or improper phasing exists at condenser.
Electrical connectionsto SPD are faulty.
Condenser disconnect is turned O ff. Recheck lights with disconnect switch in the On position.
A surge exceeding the rating of the SPD has occurred.
Connection to P24 is loose or disconnected.
Locate problem in condenser electrical panel and repair.
Locate open circuit and repair.
Replace if defective.
Check for low voltage signal from indoor unit.
Check fan motors and fuses.
Check voltage at input terminal block.
Locate connection problem and repair.
Replace SPD and inspect other components for damage and replace them if necessary.
Check the connection to P24 to verify that is connected securely.
Check the connector from the transformer for loose terminals.
9 Troubleshooting
Control Board LEDs do not light.
Fan will not run
Fuse loca ted next to P24 has blown. Verify that the fuses next to P24 hav e not blown. Replace as needed.
24V transformer has failed.
Premium Efficiency Control Board has failed.
Jumper not installed between 24V and DIN1 (for Ziehl-Abegg fan motor).
With a voltmeter verify that the output from the transformer is 24Vac ±10%. If the value exceeds ±1 0%, verify that the correct primary leads are being used.
If there is no output v oltage, verify that the primary connections are secure and receiving the correct voltage. If they are, replace the transformer.
Install jumper between 24V and DIN1 (for Z iehl Abegg fan m otor).
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