Vertiv VRC2 Series User manual

1
Vertiv I Liebert® ™ I User Manual
VRC Split System
VRC2 Series Rack Cooler
VRC3 Series Condensing Unit
User Manual

VRC Split System
User Manual
Version
V1.2
Revision date
Mar 18, 2020
BOM
31014128

Copyright by Vertiv Group Corp.
The content in this document is subject to change without notice. All rights, including rights of
translation, reproduced by printing, copying or similar methods and even of parts are reserved.
Violators will be liable for damages. All rights, including rights deriving from patent license or
registration of a utility model or design, are reserved. No part of this document may be
reproduced or transmitted in any form or by any means without the prior written consent of
Vertiv Group Corp.
Notice
The purchased products, services and features are stipulated by the contract made between
Vertiv Group Corp. and the customer. All or part of the products, services and features described
in this document may not be within the purchasing scope or the usage scope. Unless otherwise
specified in the contract, all statements, information recommendations in this document are
provided "AS IS" without warranties, guarantees or representations of any kind, either express or
implied. The information in this document is subject to change without notice. Every effort has
been made in the preparation of this document to ensure the accuracy of the contents, but all
statements, information recommendations in this document do not constitute a warranty of any
kind, express or implied.
Vertiv
United States Australia & New Indonesia Malaysia Singapore
Service Calls; Zealand Service Calls; Service Calls; Service Calls;
1-800-543-2378
Service Calls;
0817 988 2288
19 211 1668
64674218
General Inquiries; 1300 367 686 General Inquiries;
General
Inquiries;
General Inquiries;
1-800-543-2778 General Inquiries; 021 251 3003 3 7884 5000 64674218
1-800-222-5877 1800 065 345
Romania: 800477000 Egypt, Bahrain: 390499717744
Croatia: 800989019
Greece: 80044146622
Qatar: 800100439
UAE: 800035702985
Ghana: 242426263 Saudi Arabia: 8008446628
Nigeria: 7080601125 Non-listed Countries: 49872327750
Turkey: 800448826888
(Austria, Benelux, Czech Republic, France, Germany, Hungary, Ireland, Italy, Poland,
Russia, Spain, Sweden, Switzerland, UK, South Africa): 80011554499
Website: www.vertiv.com;
For Technical Support, users may contact the nearest Vertiv local sales office or service center.

Purpose of the Document
This document applies to the VRC2 series and VRC3 series of cooling solutions which maintain an optimal
environmental control mainly for technological ecosystems at minimal operating costs. This document gives
an overview of the technical specification. The figures used in this document are for reference only. Please
read this manual carefully.
Important Safety Instructions
The important safety instructions that should be followed during the installation and maintenance of the
VRC Split System are described in the following sections.
Read the manual prior to installation and operation of the unit. Only qualified personnel should move,
install, or service this equipment.
The user reads all of the precautions, compliance safety measures before working on the equipment. The
unit control must be used exclusively for the purpose for which it is intended; the manufacturer takes no
liability for incorrect use or modification to the unit control.
This manual is retained for the entire service life of the machine. The user must read all of the precautions,
danger, warnings cautionary measures mentioned in the manual prior to carrying out any operations on
the machine. Before performing any maintenance operation, switch off the machine to eliminate risks such
as electrical shocks, burns, automatic restarting, moving parts remote control.
Adhere to all the Warnings and Cautionary measures included in this manual. In the following sections,
look at the various cautionary measures and warnings that need to be read carefully prior to installing or
operating 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 who have been specially-trained in the installation of air-conditioning equipment
and who are wearing appropriate, OSHA-approved PPE.
WARNING! The components of the unit are comparatively large and heavy. Therefore, there may be a
risk when the containment collapses. The collapse may result in physical injury, fatality and damage
to the equipment.
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 injury or death. Open all local and remote electric
power-supply disconnect switches and verify that power is Off with a voltmeter before working
within the condensate pump electrical connection enclosure. 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 Liebert® controller.
WARNING! Do not power on the unit until authorized technical personnel have confirmed that the
unit connections are correct.
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! During the operation of the precision air conditioner, very high voltage may be present in
the equipment. Adhere to all of the notes and warnings marked on the equipment or contained in
this manual, which may otherwise lead to an injury or fatality.
WARNING! Only qualified maintenance personnel can operate and handle the equipment. All
maintenance and operation must follow the local laws, especially the regulations about the electric
power, refrigeration, and production.
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.
WARNING! Risk of hair, clothing and jewelry entanglement with high speed rotating fan blades. Can
cause equipment damage, serious injury or death. Keep hair, jewelry and loose clothing secured and
away from rotating fan blades during unit operation.
WARNING! Risk of contact with extremely hot and/or cold surfaces. Can cause injury. Verify that all

components have reached a temperature that is safe for human contact or wear appropriate,
OSHA-approved PPE before working within the electric connection enclosures or unit cabinet.
Perform maintenance only when the system is de-energized and component temperatures have
become safe for human contact.
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.
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.
CAUTION: Comply with the manufacturer’s instructions before and during maintenance. Failure to
observe this will result in the warranty becoming void. Adherence to the safety instructions is
mandatory to ensure personnel safety and prevent any environmental impact apart from equipment
damage. Unsuitable components will impede equipment performance and may cause equipment
shutdown. Therefore, Vertiv recommends the use of Vertiv OEM or Vertiv-approved components.
CAUTION: Avoid touching or having skin contact with the residual gas and oils in the compressor.
Wear long rubber gloves to handle contaminated parts. The air conditioning system contains
refrigerant. The release of refrigerant is harmful to the environment.
CAUTION: Certain circuits carry lethal voltages. Only professional technicians are allowed to maintain
the unit. Extra precautions should be taken when troubleshooting a live unit. Be particularly careful
troubleshooting with the unit’s power switched on.
CAUTION: If jumpers are used for troubleshooting, make sure to remove the jumpers after
troubleshooting. If the connected jumpers are not removed, they may bypass certain control
functions causing damage to the equipment.

Preface
The Vertiv VRC2 series is a split-type cooling unit which should be installed at the bottom of the rack. It is
designed to be installed inside any 480 mm (19 in.) 2 or 4-post rack, including those developed by Vertiv.
The Vertiv VRC3 series is the split-type condensing unit designed for outdoor installation and must be
installed with the Vertiv VRC2 series to form a complete system.
This manual focuses on the using instructions, including overview, instructions for installation preparations,
mechanical installation, electrical installation, system startup and commissioning, controller operation,
system operation and maintenance troubleshooting, etc.
Please read this manual carefully before installing, maintaining and troubleshooting, especially the warning
information in the manual.

TABLE OF CONTENTS
Table of Contents
1Product Overview ..............................................................................................................................................1
1.1 Product Introduction ......................................................................................................................... 1
1.2 Model Description............................................................................................................................. 2
1.3 Model Nomenclature ........................................................................................................................2
1.4 Components ...................................................................................................................................... 3
1.5 Technical Specifications.....................................................................................................................5
2Pre-Installation.................................................................................................................................................10
2.1 Fittings.............................................................................................................................................10
2.2 Self-Prepared Materials...................................................................................................................10
2.3 Transportation and Movement .......................................................................................................11
2.4 Unpacking........................................................................................................................................13
2.5 Equipment Installation Room Requirements...................................................................................15
2.6 Environment ....................................................................................................................................16
2.7 Installation Space Requirements.....................................................................................................16
2.8 Clearance Space ..............................................................................................................................17
2.9 Weight Bearing Capacity .................................................................................................................18
2.10 Inspection........................................................................................................................................18
3Mechanical Installation....................................................................................................................................19
3.1 Installation Notes ............................................................................................................................19
3.2 System Installation Layout...............................................................................................................19
3.3 Installing the Unit ............................................................................................................................21
3.4 Connecting the Copper Pipes to the Unit........................................................................................28
3.5 Refrigerant Charge...........................................................................................................................32
3.6 Installation/Pre- commissioning Check List.....................................................................................34
4Electrical Installation........................................................................................................................................35
4.1 Installation Notes ............................................................................................................................35
4.2 Cable Connection ............................................................................................................................36
4.3 Communication Cable Connecting ..................................................................................................39
4.4 Installation Inspection .....................................................................................................................40
5Controller Operation Instructions....................................................................................................................41
5.1 LCD Screen.......................................................................................................................................41
5.2 Control Buttons ...............................................................................................................................41
5.3 ON Screen........................................................................................................................................42
5.4 Normal Screen.................................................................................................................................42
5.5 Unit Working Icons ..........................................................................................................................43
5.6 Menu ...............................................................................................................................................43
6Startup Commissioning....................................................................................................................................48
6.1 Preparations Before Commissioning ...............................................................................................48
6.2 Start-up Inspection Checklist...........................................................................................................48
6.3 System Commissioning....................................................................................................................48
6.4 Commissioning Complete Inspection..............................................................................................49
7System Operation and Maintenance ...............................................................................................................50
7.1 Safety Instructions...........................................................................................................................50
7.2 Electrical Inspection ........................................................................................................................50

7.3 Indoor Unit Maintenance ................................................................................................................51
7.4 Condensing Unit Maintenance........................................................................................................52
7.5 Electrical Connection Maintenance.................................................................................................53
7.6 Cooling System Maintenance ..........................................................................................................54
7.7 Leakage Detection (F-gas) ...............................................................................................................54
7.8 System Diagnosis Testing.................................................................................................................55
7.9 Maintenance Inspection Checklist ..................................................................................................56
8Troubleshooting...............................................................................................................................................57
8.1 Troubleshooting...............................................................................................................................57
8.2 Fan Troubleshooting........................................................................................................................58
8.3 Fault Diagnosis and Handling of Electronic Expansion Valve ..........................................................58
8.4 Fault Diagnosis and Handling of the Air Conditioning System ........................................................59
Appendix I: System Diagram (Standard Unit)..........................................................................................................61
Appendix II: System Diagram (Low Ambient Unit) ..................................................................................................62
Appendix III: Wiring Diagram (VRC200/VRC201 Unit).............................................................................................63
Appendix IV:Wiring Diagram (VRC300/VRC301 Unit) .............................................................................................64
Appendix V:Wiring Diagram (VRC350/VRC351 Unit) ..............................................................................................65
Appendix VI:Wiring Diagram (VRC202 Unit) ...........................................................................................................66
Appendix VII:Wiring Diagram (VRC302 Unit) ..........................................................................................................67
Appendix VIII:Wiring Diagram (VRC352 Unit) .........................................................................................................68
Suppliers Declaration of Conformity .......................................................................................................................69

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Vertiv I VRC Split System I User Manual
PART I
GENERAL INFORMATION

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Vertiv I VRC Split System I User Manual
1Product Overview
The Vertiv™ - VRC2 series and VRC3 series are split-type cooling units for utilization in the rack which
does not permit any access to any unauthorized and unqualified personnel. If the rack is placed in
shopping malls, light industry, or any business environment, it must be used only by professionally
trained personnel. This chapter introduces the product description, model description, product
appearance main components of the cooling unit.
1.1 Product Introduction
The unit is a split-type conditioner which is designed to be installed inside the rack and includes a
separate indoor unit and outdoor condensing unit. The indoor unit installed in the rack unit, which
contains EC fan, evaporator coil and the electronic expansion valve. The condensing unit should be
mostly installed external to the room in which the rack is placed as it includes the compressor,
condenser coil and the condenser fan.
Primary technical details of the unit shown in Figure 1-1 are mentioned below:
•The unit can be installed
inside the rack.
•The airflow rate can be
modulated based on site conditions.
•The output cooling
capacity modulates as per the cooling load demands at
site.
•Operates on R410A
refrigerant.
•Quick installation and
deployment being of a modular construction
•Less work and cost for
installation compared to other air conditioner.
•White space-saving owing
to a relatively small-footprint and mounted inside the
rack utilizing lesser rack unit space.
•With the unit installed
inside the rack, the hot air from the rear side of the rack
is drawn inside the unit and cold conditioned air is
discharged from the front-side of the unit delivering it
right in front of the server’s intake side.
•The unit can be installed on both the top and bottom of
the rack inside the rack.
•The unit also can be installed at the ceiling outside the rack.
•The direction of supply air discharged from the front side of the unit can be changed by
adjusting the grilles, up or down.
•The cooling capacity is modulated automatically by the built-in control system and can range
from 25% to 100%, about 0.9 kW to 3.5 kW. This makes the unit best-suited for part-loads or
dynamic cooling loads.
•The unit is built-in with high efficiency and reliable components which include the compressor,
electronic expansion valve, EC-fan and an advanced controller specifically designed by Vertiv for
this unit.
•Utilizes EC-fan technology for the evaporator fan which saves energy by varying the airflow rate
Figure 1-1 Mounting location of
the Indoor unit

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Vertiv I VRC Split System I User Manual
exactly as per the requirement.
•The condensing unit is equipped with a variable speed condenser fan with a speed variation
ranging from 30% to 100% of the entire operating range.
1.2 Model Description
The physical appearance of air conditioner is shown in Figure 1-2.
Indoor unit Standard condensing unit
Low ambient condensing unit
Figure 1-2 Appearance of the air conditioner units
The indoor unit is installed in the rack or at the ceiling. The condensing unit is mounted external to
the rack, preferably outside in an exposed environment.
1.3 Model Nomenclature
The nomenclature of the units is shown in Figure 1-3.
Figure 1-3 Nomenclature
0 = 120 V, 1 Ph, 60 Hz
1
= 208/230 V, 1 Ph, 60 Hz
2
= 230V, 1 Ph, 50/60 Hz
0 =
Standard Unit
5
= Low Ambient Unit
2 = Split System Indoor Unit
3 = Split System Conde
nsing Unit
VRC=Vertiv
Rack Cooler
VRC 2 0 0

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Vertiv I VRC Split System I User Manual
Table 1-1 mentions the description of the indoor and condensing units as per the nomenclature.
Table 1-1 Model coding description
Model Power Supply Part Code Description
VRC200 120 V, 60 Hz 01304032
Indoor unit, 3.5 kW, 120
V
VRC300 208/230 V, 60 Hz 01304036
Condensing unit, 3.5 kW, 208/230 V for compressor
and 120
V for condensing fan
VRC350 208/230 V, 60 Hz 01304536
Low ambient condensing unit, 3.5 kW, 208/230 V for
compressor and 120
V for condensing fan
VRC201 208/230 V, 60 Hz 01304034
Indoor unit, 3.5 kW, 208/230
V
VRC301 208/230 V, 60Hz 01304035
Condensing unit, 3.5 kW, 208/230 V for compressor
208/230
V for condensing fan
VRC351 208/230 V, 60 Hz 01304537
Low ambient condensing unit, 3.5 kW, 208/230 V for
compressor 208/230
V for condensing fan
VRC202 230 V, 50/60 Hz 01304534
Indoor unit, 3.5 kW, 230
V
VRC302 230 V, 50/60 Hz 01304535
Condensing unit, 3.5 kW, 230 V for compressor 230 V
for
condensing fan
VRC352 230 V, 50/60 Hz 01304538
Low ambient condensing unit, 3.5 kW, 230 V for
compressor 230
V for condensing fan
1.4 Components
The major components of the unit include the evaporator coil, condensate drain tray, evaporator EC
fan, electronic expansion valve (EEV), inverter rotary compressor, condenser coil and condenser fan
which are placed in the Indoor and the Condensing unit as shown below.
1.4.1 Indoor Unit
The components of the indoor unit are depicted in Figure 1-4.
Indoor fan
Suction
temp
Pressure
transducer
EEV
evaporator

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Vertiv I VRC Split System I User Manual
Figure 1-4 Indoor unit
•Evaporator Coil
The slant evaporator coil provides maximum surface area for heat transfer which ensures the
delivered SHR > 0.9 always. The coil is constructed from copper pipes with aluminum fins in a slit
type configuration. With low air pressure difference across the coil even at higher air flow rates, the
coil section is light and compact and has an easy access for removal and repair/replacement.
•Condensate Drain Tray
With a metallic condensate drain tray placed under the coil assembly, it is ensured that the entire
condensate drain has easy disposal/removal from the unit with a precise condensate outlet
connection.
•Evaporator EC Fan
The indoor unit is equipped with a high-efficiency EC fan made of aluminum
that delivers high airflow rates to ensure the airflow demands are met during
the entire operational time. The EC fan has a smooth speed variation across its
operating speeds that working in synchronization with the entire system
components to deliver the precise output capacity.
•Electronic Expansion Valve
The system is incorporated with an electronic expansion valve that monitors
temperature and pressure signals simultaneously to maintain precise
adjustment of the refrigerant flow. The electronic expansion valve can ensure
even flow distribution of each end.
1.4.2 Condensing Unit
The components of the condensing unit are depicted in Figure 1-5 and Figure 1-6.
Figure 1-5 Standard condensing unit internal parts
Inverter rotary
compressor
Condenser coil
Condenser fan

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Vertiv I VRC Split System I User Manual
Figure 1-6 Low ambient condensing unit internal parts
•Compressor
The condensing unit is equipped with an inverter rotary compressor that works
on R410A refrigerant and which varies its cooling output capacity as per the
cooling demands. It ensures that the cooling capacity of the unit precisely
matches the cooling demand under all circumstances.
•Condenser Coil
The L-shaped condenser coil is designed for a maximum contact area. It is
made of copper with aluminum slit fin configuration.
•Condenser Fan
The condensing unit is equipped with an AC fan which varies the operating
speed as per the cooling variations of the compressor to always maintain a
suitable condensing pressure.
•Low Ambient Module
The low ambient module is equipped with a receive, a solenoid valve and a head pressure control
valve. This module ensures that the air conditioner system can work at -34 °C (-29.2 °F).
1.5 Technical Specifications
The detailed technical specifications which include the mechanical and the electrical details are
mentioned in Table 1-2.
Condenser fan
Condenser coil
Receiver
Inverter rotary
compressor

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Vertiv I VRC Split System I User Manual
Table 1-2 Technical specifications
Parameters Specification
Model
VRC200
VRC201
VRC202
VRC300
VRC301
VRC302
VRC350
VRC351
VRC352
Certification UL 1995
(CSA C22.2 NO.236-11)
CE
(EN 60335-1;
EN 60335-2-40;
EN 55014-1;
EN 55014-2;
EN 61000-3-2;
EN 61000-3-3;
EN 50581)
UL 1995
(CSA C22.2 NO.236-11)
CE
(EN 60335-1;
EN 60335-2-40;
EN 55014-1;
EN 55014-2;
EN 61000-3-2;
EN 61000-3-3;
EN 50581)
UL 1995
(CSA C22.2 NO.236-11)
CE
(EN 60335-1;
EN
60335-2-40;
EN 55014-1;
EN 55014-2;
EN 61000-3-2;
EN 61000-3-3;
EN 50581)
Cooling
Capacity, kW
0.9 - 3.5 /
Air Volume,
m3/h (CFM)
750 (441) /
Max Power
Input, kW
0.21 1.12 1.12
Input Voltage,
Vac
L1+L2+G,
120 Vac
L1+L2+G,
208/230 Vac
L+N+PE,
230 Vac
L1+L2+G,
208/230 Vac
L+N+PE,
230 Vac
L1+L2+L3+G,
208/230 Vac
L+N+PE,
230 Vac
Full Load
Amperage, A
2.1 1.7 1.5 7.2 7.2 6.5 7.2 7.2 6.5
Condenser Fan-
Full Load
Amperage, A
/ 0.87 0.37 0.37 0.87 0.37 0.37
Liquid Line
Solenoid Valve -
Full Load
Amperage, A
/ 0.13 0.08 0.08
Dimensions
(W×D×H, mm
(in.))
442×602×264
(17.40×23.70×10.39)
786×282×527
(30.94×11.10×20.75)
1158×282×527
(45.60×11.10×20.75)
Frequency, Hz 60 60 50/60 60 60 50/60 60 60 50/60
Color EG7021 (Black) G103 (White)
IP Code
/
IPX4 (IEC 60529)
IPX4 (IEC 60529)
Net Weight, kg
(lbs.)
23 (50) 44 (97) 68 (150)
Gross Weight,
kg (lbs.)
51 (112) 70 (154) 85 (187)
Noise Level
(tested within
the rack)
<60 dB(A) <55 dB(A) <55 dB(A)
Outdoor
Temperature
range, °C (°F)
/ -15 (5) to 45 (113) -34 (-29.2) to 45 (113)
NOTES:
•There are two control methods which are supply air control and return air control. The return air
control mode is applied to an open environment, while the supply control mode is applied to a closed
rack.
•Supply air temperature set point varies between 12.8 °C (64.4 °F)- 23 °C (73.4 °F). The recommended
supply air temperature set point is 21 °C (69.8 °F).
•When the VRC unit is used in a closed rack, the heat load should be evenly placed in rack and unused
rack position should be covered with blanking plates.

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Vertiv I VRC Split System I User Manual
The maximum capacities vary with temperatures, as shown below.
Standard Condensing Unit
Maximum Capacity, kW
Condenser Air Temperature
29.4 °C
(85 °F)
35 °C
(95 °F)
40 °C
(104 °F)
Evaporator Air Temperature to IT
Devices
(Supply Air Control)
19 °C
(66 °F)
3.7 3.6 3.6
21 °C
(70 °F)
3.9 3.8 3.8
23 °C
(73 °F)
3.9 3.8 3.8
Standard Condensing Unit
Maximum Capacity, kW
Condenser Air Temperature
29.4 °C
(85 °F)
35 °C
(95 °F)
40 °C
(104 °F)
Evaporator Air Temperature to
Cooling Module
(Return Air Control)
29.4 °C
(85 °F)
3.4 3.3 2.8
35 °C
(95 °F)
3.8 3.7 3.2
40 °C
(104 °F)
4.0 3.9 3.4
Low Ambient Condensing Unit
Maximum Capacity, kW
Condenser Air Temperature
29.4 °C
(85 °F)
35 °C
(95 °F)
40 °C
(104 °F)
Evaporator Air Temperature to IT
Devices
(Supply Air Control)
19 °C
(66 °F)
3.2 3.1 3.1
21 °C
(70 °F)
3.4 3.4 3.4
23 °C
(73 °F)
3.5 3.4 3.4
Low Ambient Condensing Unit
Maximum Capacity, kW
Condenser Air Temperature
29.4 °C
(85 °F)
35 °C
(95 °F)
40 °C
(104 °F)
Evaporator Air Temperature to
Cooling Module
(Return Air Control)
29.4 °C
(85 °F)
3.1 3.0 2.5
35 °C
(95 °F)
3.5 3.4 2.9
40 °C
(104 °F)
3.6 3.5 3.0

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Vertiv I VRC Split System I User Manual
The minimum capacities vary with temperatures, as shown below.
Standard Condensing Unit
Minimum Capacity, kW
Condenser Air Temperature
29.4 °C
(85 °F)
35 °C
(95 °F)
40 °C
(104 °F)
Evaporator Air Temperature to IT
Devices
(Supply Air Control)
19 °C
(66 °F)
0.92 0.90 0.88
21 °C
(70 °F)
0.94 0.92 0.90
23 °C
(73 °F)
0.96 0.94 0.92
Standard Condensing Unit
Minimum Capacity, kW
Condenser Air Temperature
29.4 °C
(85 °F)
35 °C
(95 °F)
40 °C
(104 °F)
Evaporator Air Temperature to
Cooling Module
(Return Air Control)
29.4 °C
(85 °F)
0.92 0.90 0.88
35 °C
(95 °F)
0.94 0.92 0.90
40 °C
(104 °F)
0.96 0.94 0.92
Low Ambient Condensing Unit
Minimum Capacity, kW
Condenser Air Temperature
29.4 °C
(85 °F)
35 °C
(95 °F)
40 °C
(104 °F)
Evaporator Air Temperature to IT
Devices
(Supply Air Control)
19 °C
(66 °F)
0.91 0.89 0.87
21° C
(70 °F)
0.93 0.91 0.89
23 °C
(73°F)
0.95 0.93 0.91
Low Ambient Condensing Unit
Minimum Capacity, kW
Condenser Air Temperature
29.4 °C
(85 °F)
35 °C
(95 °F)
40 °C
(104 °F)
Evaporator Air Temperature to
Cooling Module
(Return Air Control)
29.4 °C
(85 °F)
0.91 0.89 0.87
35 °C
(95 °F)
0.93 0.91 0.89
40 °C
(104 °F)
0.95 0.93 0.91