Vertiv VRC1 Series User manual

VRC Self-Contained Rack Cooler
VRC1 Series
User Manual

VRC Self-Contained Rack Cooler
User Manual
Version
V1.4
Revision date
Mar 18, 2020
BOM
31014115

Copyright by Vertiv Group Corp.
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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, and 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,
and recommendations in this document do not constitute a warranty of any kind, express or implied.
Vertiv
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Australia & New
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Malaysia
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Service Calls;
Zealand
Service Calls;
Service Calls;
Service Calls;
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Service Calls;
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64674218
General Inquiries;
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General Inquiries;
General
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(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 VRC1 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-Self-contained rack cooler 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, and 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, and 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, and 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! Only trained and qualified personnel must be allowed to install, maintain, and
operate the unit.
WARNING! The sharp edges, sharp angles of the object, and bare buckle can result in severe
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 unit falling over. Improper handling can cause equipment damage, injury or
death. Read all the guidelines pertaining to the system before unpacking, moving, lifting or
installing the components. Read the labels on the unit carefully to understand the safety
measures prior to handling the containment.
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! 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! 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 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 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.
WARNING! 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.
WARNING! 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.
CAUTION: The center of gravity of the unit is inclined, therefore, when moving the unit adjust
the bearing position of the forklift or hand pallet truck.
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: Switch off the VRC1 unit and then switch off the power input during equipment
maintenance. Switch off the equipment power unless the testing devices need power.
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.

Preface
The Vertiv VRC1 series is a compact, integrated, rack mounted precision cooling unit that has the
evaporator and the condenser unit installed in one enclosure. It is designed specifically to be installed
inside a 19” EIA server rack and is developed based on the Global R&D Platform of Vertiv Group Corp.
This manual focuses on the user instructions, including overview, instructions for installation preparations,
mechanical installation, electrical installation, system startup and commissioning, controller operation,
system operation and maintenance, and 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.................................................................................................................................1
1.3 Model Nomenclature ............................................................................................................................2
1.4 Components ..........................................................................................................................................2
1.5 Technical Specifications.........................................................................................................................5
2Pre-Installation...................................................................................................................................................8
2.1 Fittings...................................................................................................................................................9
2.2 Self-Prepared Material ..........................................................................................................................9
2.3 Transportation and Movement .............................................................................................................9
2.4Unpacking............................................................................................................................................11
2.5 Equipment Installation Room Requirements ......................................................................................13
2.6 Environment........................................................................................................................................13
2.7 Installation Space Requirements.........................................................................................................14
2.8 Condenser Airflow Clearance Requirement........................................................................................14
2.9 Weight Bearing Capacity .....................................................................................................................15
2.10 Inspection............................................................................................................................................15
3Mechanical Installation (Site Preparation).......................................................................................................16
3.1 Installation Notes ................................................................................................................................16
3.2 System Installation Layout...................................................................................................................16
3.3 Installing the VRC Unit into the Rack...................................................................................................17
3.4 Connecting the Accessories.................................................................................................................20
4Electrical Installation........................................................................................................................................27
4.1 Installation Notes ................................................................................................................................27
4.2 Cable from the Power Supply Connection ..........................................................................................28
4.3 Installation Inspection.........................................................................................................................30
5Controller Operation Instructions....................................................................................................................31
5.1 LCD Screen...........................................................................................................................................31
5.2 Control Buttons ...................................................................................................................................31
5.3 ON Screen............................................................................................................................................32
5.4 Normal Screen.....................................................................................................................................32
5.5 Password Interface..............................................................................................................................32
5.6 Unit Working Icons..............................................................................................................................33
5.7 Menu...................................................................................................................................................33
6Startup Commissioning....................................................................................................................................37
6.1 Preparations Before Commissioning ...................................................................................................37
6.2 Start-up Inspection Checklist...............................................................................................................37
6.3 System Commissioning........................................................................................................................37
6.4 Commissioning Complete Inspection..................................................................................................38
7System Operation and Maintenance ...............................................................................................................39
7.1 Safety Instructions...............................................................................................................................39
7.2 Electrical Inspection ............................................................................................................................40
7.3 Main Components Maintenance.........................................................................................................40
7.4 Maintenance Inspection Checklist ......................................................................................................42

7.5 Monthly Routine Inspection Items......................................................................................................42
7.6 Routine Inspection Items (Semi-annually) ..........................................................................................43
7.7 System Diagnosis Testing.....................................................................................................................43
7.8 Electrical Maintenance........................................................................................................................44
7.9 Controller Connections Maintenance .................................................................................................44
7.10 Filters Maintenance Guidance.............................................................................................................45
7.11 Maintenance Guidance for Fan Kit......................................................................................................47
7.12 Cooling System Maintenance..............................................................................................................48
8Troubleshooting...............................................................................................................................................49
8.1 Troubleshooting...................................................................................................................................49
8.2 Fan Troubleshooting............................................................................................................................50
8.3 Fault Diagnosis and Handling of Electronic Expansion Valve ..............................................................50
8.4 Fault Diagnosis and Handling of the Air Conditioning System ............................................................50
Appendix I: System Diagram....................................................................................................................................52
Appendix II: Wiring Diagram(VRC100 Unit).............................................................................................................53
Appendix III:Wiring Diagram(VRC101 Unit).............................................................................................................54
Appendix IV:Wiring Diagram(VRC102 Unit) ............................................................................................................55
Suppliers Declaration of Conformity .......................................................................................................................56

PART-I
GENERAL INFORMATION

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Vertiv I VRC Self-Contained System I User Manual
1Product Overview
The VertivTM VRC - VRC100, VRC101 or VRC102 is a compact, integrated, rack mounted cooling unit
(hereinafter referred to as “VRC1 Series”) is engineered for utilization in a 19” EIA server rack. The unit
should be used after reading the manual or consulting Vertiv. This chapter introduces the product
description, model description, product appearance, and main components of the cooling unit.
1.1 Product Introduction
The cooling unit is an integrated precision cooling unit that is a pre-engineered and pre-fabricated cooling
solution for server racks. It is specifically designed for the cooling demands of the equipment mounted
inside the rack, is precisely controlled and has a conducive and safe operating environment. The precision
air conditioner features high reliability, high sensible heat ratio and high airflow. The unit has the following
attributes:
•The cooling unit is installed at the bottom of the cabinet. The airflow path is depicted in Figure 1-1.
The hot return air enters the unit from the rear side of the cabinet and the conditioned cold air is
supplied from the front of the unit directly in front of the servers.
Figure 1-1 VRC unit in cabinet
•The evaporator and heat rejection unit are placed in one enclosure. It’s easy to install being a
plug-and-play unit, eliminating the installation work such as electrical wiring, vacuuming and
refrigerant charge on-site and refrigerant piping.
•The cooling capacity varies from 25% to 100%, approximately 0.9 kW to 3.6 kW. It’s designed to
efficiently cater to part-load or variable cooling loads.
•The unit is designed by Vertiv for high efficiency and reliability, and includes the variable capacity
inverter compressor, electronic expansion valve, variable speed EC-fan, and controller.
•The evaporator EC fan provides energy savings by smoothly varying the fan speed to deliver the
airflow required to match the cooling load.
•The condenser fan speed ranges from 30% to 100% in sync with the variation in the compressor
cooling capacity.
1.2 Model Description
I.T. Space inside cabinet
Evaporator air
outlet
Evaporator
air inlet
Front
Rear
Condenser air outlet

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Vertiv I VRC Self-Contained System I User Manual
The physical appearance of the cooling module is shown in Figure 1-2.
Figure 1-2 Appearance of the VRC precision air conditioner
The rear view and front view of cooling module are shown in Figure 1-3.
Figure 1-3 Front view and rear view of the cooling unit
1.3 Model Nomenclature
The nomenclature of the VRC units is shown in Figure 1-4.
Figure 1-4 Nomenclature
1.4 Components
The major components of the cooling module include the evaporator coil, evaporator EC fan, electronic
expansion valve, compressor, condenser coil, and condenser AC fan which are placed in the VRC unit as
shown below.
Rear View
Front View
Supply air
Return air
Condenser in
Evaporator Side
Condenser out
0 = 120 V, 1 Ph, 60 Hz
1 = 208/230 V, 1 Ph, 60 Hz
2 = 230 V,1 Ph, 50/60 Hz
1 = Self Contained Cooling Module
VRC=Vertiv Rack Cooler
VRC

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Vertiv I VRC Self-Contained System I User Manual
Figure 1-5 Schematic diagram of internal parts of cooling section
•Evaporator Coil
The design of the V shaped evaporator coil provides maximum surface area for heat transfer which
provides a high sensible heat ratio (SHR) of > 0.9. The coil is constructed from copper tubes with aluminum
fins. Low air pressure difference across the coil reduces fan energy even at higher air flow rates, and the
coil section is light and compact.
•Condensate Drain Tray
With a metal condensate drain tray placed under the coil assembly, condensation drains to a
condensate outlet connection.
•Variable Speed Evaporator EC Fan
The cooling module is equipped with a high-efficiency EC fan made of aluminum
that delivers high airflow rates to meet the airflow demands during the entire
time of operational. The EC fan has a smooth speed variation across its operating
speeds that work in synchronization with the entire system components to deliver
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 ensures even flow
distribution from each end.
Evaporator
EC fan
Condenser
AC fan
Condenser
Compressor
Evaporator

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Vertiv I VRC Self-Contained System I User Manual
•Compressor
The cooling module is equipped with a variable speed inverter rotary compressor that
works on R410A refrigerant and which varies its cooling output capacity as per the
cooling demands.
•Condenser Coil
The L-shaped condenser coil is designed for a maximum contact area. It is made of copper tubes with an
aluminum fin configuration.
•Condenser Fan
The condenser unit is equipped with an AC fan which varies the operating speed
with the cooling variations of the compressor to maintain a suitable condensing
pressure. The condenser fans are made of metallic material for prolonged life and
durability..

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Vertiv I VRC Self-Contained System I User Manual
1.5 Technical Specifications
The detailed technical specifications which include the mechanical and the electrical details are mentioned
in the below table:
Table 1-1 Technical specifications
Parameters
Specification
Model
VRC100
VRC101
VRC102
Certification
UL484
UL484
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 - 3.6
0.9 - 3.6
0.9 - 3.6
Air Volume, m3/h (CFM)
750 (441)
750 (441)
750 (441)
Max Power Input, kW
1.63
1.86
1.86
Full Load Amperage, A
16.5
13
11.5
Dimensions (Without
Package)
W x D x H mm (Inches)
442x978x439 (17.4” x 38.5” x 17.28”)
Input Type
Power Cord (3.2m)
with NEMA 5-20P
Power Cord (3.2m)
with NEMA L6-20P
IEC 60320 C20 Inlet
+ Interconnection Cable (3.0m)
IEC 60320 C19 to C20
Voltage (Vac)
L+N+G, 120 Vac
L1+L2+G, 208
Vac/230 Vac
L+N+PE, 230 Vac
Frequency, Hz
60
50/60
Color
EG7021 (Black)
System Protection Grade
IP20 (IEC 60529)
Net Weight, kg (lbs)
72 (158.7)
74 (163.1)
Gross Weight, kg (lbs)
134 (295.4)
Noise Level, dB(A)
<66
Inthe case that VRC is installed on the bottom of the rack, the maximum capacities at various evaporator
and condenser air inlet temperatures are mentioned below:
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 Control)
29.4 °C (85 °F)
3.1
2.6
2.2
35 °C (95 °F)
3.4
3.3
2.8
40 °C (104 °F)
3.6
3.5
3.1
Maximum Capacity, kW
Condenser Air Temperature
25 °C (77 °F)
30 °C (86 °F)
35 °C (95 °F)
Evaporator Air Temperature to
IT Devices
(Supply Control)
19 °C (66 °F)
3.3
3.2
3.1
21 °C (70 °F)
3.5
3.4
3.3
23 °C (73 °F)
3.6
3.5
3.4

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Vertiv I VRC Self-Contained System I User Manual
Inthe case that VRC is installed on the bottom of the rack, the minimal cooling capacity are mentioned
below:
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 Control)
29.4 °C (85 °F)
0.90
0.88
0.86
35 °C (95 °F)
0.92
0.90
0.88
40 °C (104 °F)
0.94
0.92
0.90
Minimum Capacity, kW
Condenser Air Temperature
25 °C (77 °F)
30 °C (86 °F)
35 °C (95 °F)
Evaporator Air Temperature to
IT Devices
(Supply Control)
19 °C (66 °F)
0.89
0.88
0.87
21 °C (70 °F)
0.90
0.89
0.88
23 °C (73 °F)
0.91
0.90
0.89
NOTES:
•Capacity may be reduced with addition of heat rejection ductwork.
•There are two control methods which are supply control and return control. The return control
mode is applied to an open environment, while the supply control mode is applied to an enclosed
cabinet, such as Vertiv’s VRC-S.
•Supply air temperature set point variable between 18 °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 an enclosed cabinet, the heat load should be evenly placed in the
cabinet. And unused rack position should be covered with blanking plates.

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Vertiv I VRC Self-Contained System I User Manual
PART II
INSTALLATION

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Vertiv I VRC Self-Contained System I User Manual
2Pre-Installation
The air conditioner is engineered equipment and requires precise installation procedures for which the
preliminary preparation is very important. This chapter details the installation preparation, including how
to prepare the installation environment and space and reserve the maintenance space, the air conditioner
running and storage environment requirement, and how to unpack and inspect. Please read this chapter
carefully before installation.
WARNING! Only trained and qualified personnel must be allowed to install, maintain, and
operate the unit.
WARNING! The sharp edges, sharp angles of the object, and bare buckle can result in severe
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 unit falling over. Improper handling can cause equipment damage, injury or
death. Read all the guidelines pertaining to the system before unpacking, moving, lifting or
installing the components. Read the labels on the unit carefully to understand the safety
measures prior to handling the containment.
CAUTION: The center of gravity of the unit is inclined, therefore, when moving the unit adjust
the bearing position of the forklift or hand pallet truck.