Vertiv VRC, VRC2, VRC3 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

V1.3

Revision date

Aug 26, 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 power­supply 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, OSHA­approved 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 especially the warning information carefully before installing, maintaining and

troubleshooting the equipment.

TABLE OF CONTENTS

1 Product Overview .............................................................................................................................................. 2

1.1 Product Introduction ......................................................................................................................... 2

1.2 Model Description ............................................................................................................................. 4

1.3 Model Nomenclature ........................................................................................................................ 4

1.4 Components ...................................................................................................................................... 5

1.5 Technical Specifications ..................................................................................................................... 9

2 Pre-Installation................................................................................................................................................. 13

2.1 Fittings ............................................................................................................................................. 13

2.2 Self-Prepared Materials ................................................................................................................... 13

2.3 Transportation and Movement ....................................................................................................... 14

2.4 Unpacking ........................................................................................................................................ 16

2.5 Equipment Installation Room Requirements................................................................................... 18

2.6 Environment .................................................................................................................................... 19

2.7 Installation Space Requirements ..................................................................................................... 19

2.8 Clearance Space .............................................................................................................................. 20

2.9 Weight Bearing Capacity ................................................................................................................. 22

2.10 Inspection ........................................................................................................................................ 22

3 Mechanical Installation .................................................................................................................................... 23

3.1 Installation Notes ............................................................................................................................ 23

3.2 System Installation Layout ............................................................................................................... 23

3.3 Installing the Unit ............................................................................................................................ 25

3.4 Connecting the Copper Pipes to the Unit ........................................................................................ 32

3.5 Refrigerant Charge ........................................................................................................................... 36

3.6 Installation/Pre-commissioning Check List ...................................................................................... 38

4 Electrical Installation ........................................................................................................................................ 39

4.1 Installation Notes ............................................................................................................................ 39

4.2 Cable Connection ............................................................................................................................ 39

4.3 Communication Cable Connecting .................................................................................................. 43

4.4 Installation Inspection ..................................................................................................................... 44

5 Controller Operation Instructions .................................................................................................................... 45

5.1 LCD Screen ....................................................................................................................................... 45

5.2 Control Buttons ............................................................................................................................... 45

5.3 ON Screen ........................................................................................................................................ 46

5.4 Normal Screen ................................................................................................................................. 46

5.5 Unit Working Icons .......................................................................................................................... 47

5.6 Menu ............................................................................................................................................... 47

6 Startup Commissioning .................................................................................................................................... 52

6.1 Preparations Before Commissioning ............................................................................................... 52

6.2 Start-up Inspection Checklist ........................................................................................................... 52

6.3 System Commissioning .................................................................................................................... 52

6.4 Commissioning Complete Inspection .............................................................................................. 53

7 System Operation and Maintenance ............................................................................................................... 54

7.1 Safety Instructions ........................................................................................................................... 54

7.2 Electrical Inspection ........................................................................................................................ 54

7.3 Indoor Unit Maintenance ................................................................................................................ 55

7.4 Condensing Unit Maintenance ........................................................................................................ 56

7.5 Electrical Connection Maintenance ................................................................................................. 57

7.6 Cooling System Maintenance .......................................................................................................... 58

7.7 Leakage Detection (F-gas) ............................................................................................................... 58

7.8 System Diagnosis Testing ................................................................................................................. 59

7.9 Maintenance Inspection Checklist .................................................................................................. 60

8 Troubleshooting ............................................................................................................................................... 61

8.1 Troubleshooting............................................................................................................................... 61

8.2 Fan Troubleshooting ........................................................................................................................ 62

8.3 Fault Diagnosis and Handling of Electronic Expansion Valve .......................................................... 62

8.4 Fault Diagnosis and Handling of the Air Conditioning System ........................................................ 62

Appendix I: System Diagram (Standard Unit) .......................................................................................................... 64

Appendix II: System Diagram (Low Ambient Unit) .................................................................................................. 65

Appendix III: Wiring Diagram (VRC200/VRC201 Unit) ............................................................................................. 66

Appendix IV:Wiring Diagram (VRC300/VRC301 Unit) ............................................................................................. 67

Appendix V:Wiring Diagram (VRC350/VRC351 Unit) .............................................................................................. 68

Appendix VI:Wiring Diagram (VRC202 Unit) ........................................................................................................... 69

Appendix VII:Wiring Diagram (VRC302 Unit) .......................................................................................................... 70

Appendix VIII:Wiring Diagram (VRC352 Unit) ......................................................................................................... 71

Suppliers Declaration of Conformity ....................................................................................................................... 72

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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

1 Product 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, and 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 is 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 the unit includes compressor,
condenser coil and 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 conditioners

• 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

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.

• Refer to Figure 1-2 for the nameplate description of the VRC2 Series Rack Cooler model:

Figure 1-1 Mounting

Location of the

Indoor Unit

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Vertiv I VRC Split System I User Manual

UL Model:

Position

Description

Position

Description

1

Unit defined by 6 digits

9

Refrigerant charge of the indoor unit

2

Supply Power

10

Discharge Side Excessive Operating Pressure

3

Cooling capacity

11

Suction Side Excessive Operating Pressure

4

Indoor fan power in total

12

Minimum Circuit Amps

5

Indoor fan full load current

13

Maximum Overcurrent Protection

6

Outdoor fan power

14

Equipped with outdoor model

7

Outdoor fan full load current

15

Serial Number

8

Refrigerant Category

CE Model:

Position

Description

Position

Description

1

Unit defined by 6 digits

9

Heat Exchange Max Working Pressure

2

Supply Power

10

Max Allowable Pressure of the Unit

3

Refrigerant Category

11

Full load Current

4

Refrigerant charge of the unit

12

Net weight

5

CO2 Tonnes

13

Class of Equipment

6

Discharge Side Excessive Operating Pressure

14

Manufacturing Date

7

Suction Side Excessive Operating Pressure

15

Serial Number

8

Global Warming Potential

Figure 1-2 Product Nameplate and Model Description

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Vertiv I VRC Split System I User Manual

1.2 Model Description

The physical appearance of air conditioner is shown in Figure 1-3.

Indoor unit Standard condensing unit

Low ambient condensing unit

Figure 1-3 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 1-4.

Figure 1-4 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 Condensing 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.

1.4.1 Indoor Unit

The components of the indoor unit are depicted in Figure 1-5.

Figure 1-5 Indoor Unit

Indoor fan

Suction

temp.

Pressure

transducer

EEV

Evaporator

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Vertiv I VRC Split System I User Manual

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, 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, 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.

 Sensors

Sensors provide important support for the precise control and reliable operation of indoor and outdoor
units. Figure 1-6 shows the position of the sensors in the indoor unit.

Figure 1-6 Indoor Unit Sensor Location

High pressure

transducer

Low pressure

transducer

Suction temperature

sensor

Supply air

temperature sensor

Return air temperature sensor

Water level sensor

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Vertiv I VRC Split System I User Manual

1.4.2 Condensing Unit

The components of the condensing unit are depicted in Figure 1-7 and Figure 1-8.

Figure 1-7 Standard Condensing Unit Internal Parts

Figure 1-8 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.

Inverter rotary

compressor

Condenser coil

Condenser fan

Condenser fan

Condenser coil

Receiver

Inverter rotary

compressor

Discharge Hi-temp

switch

High pressure

switch

Discharge Hi-temp switch

High pressure

switch

Pressure switch

Head pressure valve

Solenoid valve

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Vertiv I VRC Split System I User Manual

• 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 receiver, 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).

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Vertiv I VRC Split System I User Manual

1.5 Technical Specifications

The detailed technical specifications which include the mechanical and the electrical details are listed
in Table 1-2.

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 60335-2­40;
EN 55014-1;
EN 55014-2;
EN 61000-3-2;
EN 61000-3-3;
EN 50581)

Cooling
Capacity, kW

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 Fan­Full 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)

Operation
Temperature
range, °C (°F)

18 (64.4) to 40 (104)

-15 (5) to 45 (113)

-34 (-29.2) to 45 (113)

NOTE:

• The capacity value is measured under the conditions of indoor temperature dry bulb/wet bulb 35 °C

(95 °F), 20.6 °C (69 °F) and outdoor temperature 35 °C (95 °F).

• At the same working conditions, the low-temperature outdoor unit has a reduced capacity compared

with the standard outdoor unit.

• There are two control methods, supply control and return control. The return control mode is suggested

to be set in an open environment, while the supply control mode is suggested to be set in an enclosed
rack.

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Vertiv I VRC Split System I User Manual

• Supply air temperature set point varies between 12.8 °C (64.4 °F) and 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.

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
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

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
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

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
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

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
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

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

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Vertiv I VRC Split System I User Manual

PART II

INSTALLATION

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Vertiv I VRC Split System I User Manual

2 Pre-Installation

The air conditioner is an equipment and requires installation works. The preliminary preparation is
very important. This chapter details the pre-installation, 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! 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.

2.1 Fittings

The fittings are shown in Figure 2-1.

Figure 2-1 Fittings

The usage of fittings is shown in Table 2-1. They are included in the package.

Table 2-1 Fittings Instruction

2.2 Self-Prepared Materials

The cables routed from the room to the unit and the circuit breakers must be prepared at the customer
site or are to be obtained by the customer; the specifications for the same are given in the Table 2-2.

Fitting Utility

Usage

Quantity

M6 cage nut

Used with M6 pan-head screws for tightening pillars

6

M6 Pan-head screw

Used to install the VRC 20X unit

6

M5 center screw

Used to fasten the L-shape mounting rails

10

M6 Cage Nut

M6 Pan-head Screw

M5 Center Screw

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Vertiv I VRC Split System I User Manual

Table 2-2 Self-Prepared Materials

Parts

Specifications

External circuit breaker 1

Please refer to FLA (Full Load Amperage) of
indoor unit in Table 1-2

External circuit breaker 2

Please refer to FLA of condensing unit in
Table 1-2

Input power supply cables for indoor unit

Please refer to FLA of indoor unit in Table 1-
2

Input power supply cables for condensing unit

Please refer to FLA of condensing unit in
Table 1-2

Cables for condenser fan

Please refer to FLA of condenser fan in Table
1-2

Cables for liquid line solenoid valve (only used in VRC350,
VRC351 and VRC352)

Please refer to FLA of liquid line solenoid
valve in Table 1-2

Liquid copper pipe

Please refer to pipe connection of unit

Gas copper pipe

Please refer to pipe connection of unit

Communication line between indoor and condensing unit

Communication line with RJ45 ports

2.3 Transportation and Movement

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.

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.

The unit consists of an indoor unit and an outdoor unit. Both of them are comparatively heavy
equipment and need to be moved by hand pallet truck or electrical forklift to the vicinity of the pre­decided location to be installed. Table 2-3, Figure 2-2 and Figure 2-3 show the dimensions of the unit’s
component with the package.

Figure 2-2 Package Dimensions – Indoor Unit

Forklift direction

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Vertiv I VRC Split System I User Manual

Figure 2-3 Package Dimensions – Condensing Unit

The unit with packing dimensions and weights are listed in Table 2-3:

Table 2-3 Packaging Dimensions

Component

Packaging

Range of Dimensions
(Unit: mm (in.))

Weight with Package
(Unit: kg (lbs.))

H W D

Unit with
package

VRC200
VRC201
VRC202

Wooden
pallet with
cardboard
box
460
(18.11)

760
(29.92)

830
(32.68)

51
(112)

VRC300
VRC301
VRC302

750
(29.53)

480
(18.90)

970
(38.19)

70
(154)

VRC350
VRC351
VRC352

755
(29.72)

480
(18.90)

1350
(53.20)

85
(187)

Figure 2-4 depicts the schematic diagram of a hand pallet truck and an electric forklift.

Figure 2-4 Hand Pallet Truck and Electric Forklift

If a hand pallet truck or an electric forklift truck is used, the tines of the hand pallet or electric forklift
must be aligned with the center of gravity to prevent the package from toppling or falling over as
depicted in Figure 2-5.

H

W

D

Forklift Direction

Forklift direction

Electrical forklift

Hand pallet truck

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Vertiv I VRC Split System I User Manual

Figure 2-5 Forklift Direction

While moving the package, the obliquity must be maintained at an angle of 90° ± 10°. As shown in
Figure 2-6, the 90° ± 10° obliquity is suitable to move the rack to the vicinity of the desired location.

Figure 2-6 Carrying Obliquity

NOTE:

• Ensure that the equipment stands upright.

• While using the forklift or the hand pallet truck, ensure that the fork arms (if adjustable and flexible)

open to the greatest extent. This is done so that the fork arms can be placed under the pallet of the
equipment in a precise manner.

• Ensure that the length of the fork arms match with that of the equipment.

2.4 Unpacking

Following are the steps and procedures that are to be observed during the unpacking process:

2.4.1 Unpacking of Indoor Unit

• The unpacking of the indoor unit from the packing materials is shown in Figure 2-7. Move the

equipment of the assembled package to an open, firm leveled ground in the vicinity of the
predetermined installation site.

• Cut off the packing strip on the package paper box using a utility knife followed by removing the

package paper box of the unit.

• Remove the packing materials, including paper cover, support cardboard, paper box, cushion and

paper corner in a specific order as mentioned from the top side of the unit.

• Remove the unit from the wooden pallet.

Forklift Direction

Forklift direction

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Vertiv I VRC Split System I User Manual

The accessory list of the indoor unit is shown in Table 2-4.

Figure 2-7 Unpacking Indoor Unit

Table 2-4 VRC2 Series Accessories

No.

Item

Quantity

1

Drainage Kit

Condensate Pump and Pump Bracket

1

2

Condensate Water Pipe (7.5 m /24.6 ft.)

1

3

Drain fitting

1

4

Display kit

Display and Display Magnetic Box

1 5 10 m (32.8 ft.) Cable of Display

1 6 0.5 m (1.6 ft.) Cable of Display

1

7

SIC Card Kit

1

8

L-shape Mounting Rail Kit

2 9 Cage Nuts (M6)

6

10

Pan-Head Screws M6x12 (Torx T30)

6

11

Center Screws M5x12 (Torx T20)

10

12

USB Converter Cable

1

13

Cable Ties 100x2,5

10

14

User Manual

1

15

VRC Cooling Unit

1

2.4.2 Unpacking of Condensing Unit

• The unpacking of the condensing unit from the packing materials is shown in Figure 2-8.

• Move the equipment of the assembled package to an open, firm leveled ground in the vicinity of

the installation site.

• Cut off the packing strip on the package paper box using a utility knife followed by removing the

package paper box of the unit.

• Remove the packing materials, including paper cover, support cardboard, paper box, cushion and

Display and display

magnetic box

(4)

VRC cooling unit

(15)

SIC card kit

(7)

Drain fitting

(3)

Condensate pump and

pump bracket

(1)

Condensate water pipe

(2)

EPE

L-shape mounting rail kit

(8)

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Vertiv I VRC Split System I User Manual

paper corner in a specific order as mentioned from the top side of the unit.

• Remove the unit from the wooden pallet.

Standard condensing unit Low ambient condensing unit

Figure 2-8 Unpacking Condensing Unit

NOTE: Packing materials of the unit are recyclable. Retain the packing materials for further use or dispose

them appropriately as per the protocols and local regulations.

The accessory list of the condensing unit is shown in Table 2-5.

Table 2-5 VRC3 Series Accessories

Sr No.

Item

Quantity

Model

1 Side Panel

2

VRC300
VRC301
VRC302

2 Front Panel

1

3 Screws (M4x10)

10

2.5 Equipment Installation Room Requirements

The requirements are as follows:

• To ensure the normal operation of environmental control system, the rack should be free from air

leakages that de-stabilize the temperature gradient and also could lead into moisture occurrence.

• The rack should have appropriate thermal separation.

• The condensing air entering the equipment room should be reduced to a minimum as the entry

of condensing air may increase the load of the system. It is recommended that the leakage rate
of condensing air be kept below 5% of the total internal airflow.

• All the doors and windows should be closed properly to avoid any air infiltration from outside into

the room.

NOTE: Avoid locating the indoor unit in concave or narrow areas which can affect the airflow. It is prohibited

to use the cooling unit in an unconducive condensing environment.

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Vertiv I VRC Split System I User Manual

2.6 Environment

Following are the requirements that need to be observed from the environment point of view for site
preparation of the unit:

• CAUTION: Keep the unit in a place far away from sparks or any heat source.

• CAUTION: Emission of erosive gases and organic solvents should not be near the unit.

2.6.1 Operating Environment

The operation environment requirements are mentioned in Table 2-6.

Table 2-6 Operating Environment

Item

Requirements

Installation position

The maximal equivalent length of piping between the indoor unit and
condensing unit [1]: 30 m (98.43 ft.)
Vertical distance ΔH [2]: -5 m (-16.40 ft.) ≤ ΔH ≤15 m (49.21 ft.)

Ambient temperature

Indoor: 18 °C to 40 °C (64.4 °F to 104 °F)
Standard condensing: -15 °C to 45 °C (5 °F to 113 °F)
Low ambient condensing unit: -34 °C to 45 °C (-29.2 °F to 113 °F)

Ambient humidity

17% to 60%

Protection level

Condensing unit: IPX4 (IEC 60529)

Altitude

< 1000 m (3280.84 ft.). For every 1000m increase in elevation, the evaporation
temperature drops by 0.5 °C (0.9 °F ) the net cooling capacity drops by 7%

NOTE:
[1] For the equivalent length of parts, refer to Table 3-7
[2] The value is positive if the condensing unit is installed above the indoor unit; negative if the indoor
unit is installed above the condensing unit

2.6.2 Storage Environment

The storage environment requirements are mentioned in Table 2-7.

Table 2-7 Storage Environment

Item

Requirements

Storage environment

Clean (without dust)

Ambient humidity

< 95% RH @40 °C (104 °F)

Ambient temperature

-40 °C to 70 °C (-40 °F to 158 °F)

Storage time

The total shipment and storage time should not exceed 6 months. Otherwise,
the performance needs to be re-calibrated

2.7 Installation Space Requirements

The indoor unit is a specifically engineered air conditioning unit. It is recommended to install the
indoor unit inside the rack at the lowest rack unit space, as shown in the installation section.

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Vertiv I VRC Split System I User Manual

2.8 Clearance Space

2.8.1 Indoor Unit

To facilitate ease of installation and maintenance, enough space must be provisioned at site. When the
indoor unit is installed in room, the distance from the front and other sides of the unit to the wall or
other obstacles must be greater than 1000 mm (30.00 in.) and 600 mm (18.00 in.) respectively, as
shown in Figure 2-9. When the indoor unit is installed in the rack, the distance from the front and rear
sides of the rack to the wall or other obstacles must be greater than 1000 mm (30.00 in.) and 600 mm
(18.00 in.) respectively.

Figure 2-9 Minimum Distance for Pull-out during Maintenance (Top View)

2.8.2 Condensing Unit

For standard condensing unit, it is not necessary to install air deflector when used in indoor
environment or in outdoor environment that are always greater than 0°C (32°F), see Figure 2-10. For
units without air deflector, the recommended clearance space is shown in Figure 2-11. Otherwise, it
is necessary to install air deflector when used in outdoor environment below 0°C (32°F), and the
necessary clearance space is shown in Figure 2-12. If there is no wall to meet the installation clearance,
it is recommended to use the low ambient condensing unit. Besides, it is necessary to use the low
ambient condensing unit when outdoor temperature is below -15°C (5°F).

Figure 2-10 Standard Condensing Unit Without Air Deflector for Indoor Use

600mm

[18'']

600mm

[18'']

600mm

[18'']

1000mm

Indoor

Indoor

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Vertiv I VRC Split System I User Manual

Figure 2-11 Clearance space required for standard condensing unit without air deflector for outdoor use

Figure 2-12 Clearance Space Required for Standard Condensing Unit With Air Deflector

Front

Outdoor

Wall

Standard outdoor unit

Back

Standard outdoor unit + air deflector

Wall

Back

Front

Necessary clearance when installing air deflector = 200 mm (7.9 in.)

≥450 mm (17.7 in.)

≥450 mm (17.7 in.)

≥450 mm (17.7 in.)

≥450 mm (17.7 in.)

≥450 mm (17.7 in.)

Outdoor
(Above 0°C (32°F) all year round)

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Vertiv I VRC Split System I User Manual

For low ambient condensing unit, the air deflector does not need to be installed. The distance from
the wall should be large enough to be maintained and the minimum distance from the front side
(supply air side) of the condensing unit should be 450 mm (17.72 in.) from any wall, obstacles or
adjacent devices. It is a must to provide these clearance distances as shown in Figure 2-13 to ensure
appropriate airflow across the condensing unit.

Figure 2-13 Recommended Clearance Space Required for Low Ambient Condensing Unit

2.9 Weight Bearing Capacity

The cooling unit will be installed inside the rack because the concentrated floor loading of the rack will
increase. Therefore, the weight bearing capacity of the floor of the computer room must be taken into
consideration.

2.10 Inspection

• The unit is pre-charged. Check that there is no refrigerant and oil leaks.

• Check the system fittings and its components against the packing list to ensure that everything is

in its designated position and the entire product assembly is intact.

• If any parts or components are missing or damaged, immediately report to the carrier. If hidden

damages are observed, then contact the local offices of that carrier as well as Vertiv Group Corp.
at the earliest.

Wall

Back

Front

Wall

Back

Front

≥450 mm (17.7 in.)

≥450 mm (17.7 in.)

Outdoor

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Vertiv I VRC Split System I User Manual

3 Mechanical Installation

Proper installation is essential to achieve the intended design performance of the equipment and to
maximize its service life. This chapter describes the mechanical installation of cooling system, including
installation notes, system installation layout, end installation, unit piping installation, installation
finishing work and installation check. This section should be used in conjunction with current
mechanical and electrical installation regulations.

3.1 Installation Notes

NOTE:

• The indoor unit needs to be installed inside the rack or in room.

• Before installation, make sure that the installation environment meets the requirements and there must

be sufficient provision for connecting the condensate drain line to the drain point.

• Follow the design drawings strictly when installing the equipment and reserve the space for maintenance.

The manufacturer’s engineering dimensions drawings can serve as a reference.

• Two persons are required for installation.

• Torx bits T20 and T30 are needed during installation, as shown in Figure 3-1.

Figure 3-1 Torx Bits

3.2 System Installation Layout

The overall layout of the unit which comprises both the indoor unit and the condensing unit is depicted
in Figure 3-2, Figure 3-3 and Figure 3-4.

Figure 3-2 Indoor Unit

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Vertiv I VRC Split System I User Manual

Figure 3-3 Standard Condensing Unit

Figure 3-4 Low Ambient Condensing Unit

The dimensions of indoor unit and condensing unit are listed in Table 3-1:

Table 3-1 Dimensions of Indoor and Condensing Unit

Component
Range of Dimensions (Unit: mm (in.))

H W D

Indoor Unit

VRC200
VRC201
VRC202

264
(10.39)

442
(17.40)

602
(23.70)

Condensing Unit
VRC300

VRC301
VRC302

527
(20.75)

786
(30.94)

282
(11.10)

VRC350
VRC351
VRC352

527
(20.75)

1158
(45.60)

282
(11.10)

Each standard condensing unit (VRC300, VRC301, VRC302) has a set of air deflector. The dimension of
the air deflector is shown in the Table 3-2.

Table 3-2 Dimension of Air Deflector

Component
Range of Dimensions (Unit: mm (in.))

h w d

Standard Condensing
Unit

VRC300
VRC301
VRC302

500
(19.68)

563
(22.17)

233
(9.17)

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Vertiv I VRC Split System I User Manual

3.3 Installing the Unit

3.3.1 Installing the Indoor Unit Inside the Rack

A front view with dimensions is shown in Figure 3-5 and Figure 3-6, which would help mount the unit
inside the rack.

Figure 3-5 Indoor Unit Dimensions

Figure 3-6 Front View of Indoor Unit

The detailed dimensions of the indoor unit with their weights are mentioned in Table 3-3.

Table 3-3 Dimensions of Cooling Unit

Model

Dimensions (W × D × H, mm (inch))

Net Weight (kg. (lbs))

Cooling unit

442 × 602 × 264
(17.40×23.70×10.39)

23.0 (50.7)

1. Mounting the L-shaped rails in the rack

Each of the two L-shape rails is comprised of two parts, a long front rail and a slotted rear bracket, as
shown in Figure 3-7. There are left and right VRC rails. The flanges of each of the front rails should be
on the bottom and pointing toward the center of the rack. Slip the slots in the rear rail bracket over
the pressed studs in the front rail part. Loosely fasten with nuts. Fasten the ends of the front rails and
rear brackets to the uprights using center screws M5x12 T20. Torque=4.0 Nm (2.95 ft.-lb.). Once in
place, tighten the nuts on the front rail part studs. Torque = 5.6 Nm (4.13 ft.-lb.).

W

H

D

491.6 mm
[19.35'']

465.0 mm
[18.31'']

442.0 mm
[17.40'']

263.5 mm
[10.37'']

219.0 mm

[8.62'']

146.0 mm

[5.75'']

Φ7.2 mm
[0.28'']

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Vertiv I VRC Split System I User Manual

Figure 3-7 L-Shape Rails Installation

2. Inserting the indoor unit into the rack

Insert the indoor unit into the front of the rack until its front brackets are against the rack’s uprights.

3. Fastening the indoor unit

Fasten the indoor unit front brackets to both front uprights using four M6 cage nuts and M6x12 T30
screws (5.6 Nm/4.13 ft.-lb. torque), as shown in Figure 3-8.

Figure 3-8 Indoor Unit Installation

NOTE:

• Make sure the indoor unit is installed horizontally, otherwise high-water level alarms may be triggered

incorrectly.

• For installation in a 2-post rack, please purchase accessory 2POSTRMKITVRC. Installation instructions

are included with this rail kit.

3.3.2 Installing the Condensing Unit

The physical appearance of the condensing unit is shown in Figure 3-3 and Figure 3-4. The top view of
the standard condensing unit is shown in Figure 3-9 and the low ambient condensing unit is shown in
Figure 3-10.

Left VertivTM VRC
front rail

Left VertivTM VRC
slotted rear bracket

Cross section of VertivTM VRC-S shown
for Illustrative purposes.

Slotted rear
bracket

Slotted rear
bracket

Front rail part

Front rail part

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Vertiv I VRC Split System I User Manual

Figure 3-9 Standard Condensing Unit Top View

Figure 3-10 Low Ambient Condensing Unit Top View

Table 3-4 Condensing Unit Dimensions

Model

Dimensions (W × D × H, mm
(in.))

Net Weight (kg (lbs.))

VRC300
VRC301
VRC302

786×282×527
(30.94×11.10×20.75)

44.0 (97.0)

VRC350
VRC351
VRC352

1158×282×527
(45.60×11.10×20.75)

68.0 (149.9)

The condensing unit must be installed vertically. The condensing unit can either be installed higher
than the indoor unit or lower than the indoor unit. Figure 3-11 shows the scenario where the
condensing unit is installed higher than the indoor unit. When installing the condensing unit 7.5m
higher than the indoor unit, a trap should be installed on the discharge pipe. This trap will retain
refrigerant oil in the off cycle of the compressor. When the compressor starts, oil in the trap will be
carried up and return to the compressor immediately.

829mm
[32.6'']

696mm
[27.4'']

298mm
[11.7'']

530mm
[20.9'']

R5mm
[R0.2'']

563mm
[22.2'']

1206mm

[47.5'']

1073mm

[42.2'']

316mm

[12.4'']

298mm

[11.7'']

R5mm

[R0.2'']

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Vertiv I VRC Split System I User Manual

Figure 3-11 Condensing Unit Installed Higher Than the Indoor Unit

Figure 3-12 shows the scenario where the condensing unit is installed lower than the indoor unit.

Figure 3-12 Condensing Unit Installed Lower Than the Indoor Unit

Outdoor unit

Liquid side pipe (no direct sunlight)

Isolation floor

Wall bushing

Trap

Rack

Indoor unit

Max

7.5m

[24.60 ft]

Sealing on inlets

Gas side pipe

Heat insulation
material

Floor

15m

[49.21ft]

Drain pipe of condensate water
(extend to outdoor to drain
condensate water)
1:200

Drain pipe of condensate water
(extend to outdoor to drain
condensate water)
1:200

Sealing on inlets

Gas side pipe

Heat insulation
material

Floor

Isolation floor

Wall bushing

Outdoor unit

Rack

Indoor unit

5m

[16.40ft]

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Vertiv I VRC Split System I User Manual

Table 3-5 shows the vertical distance between the indoor and the condensing unit.

Table 3-5 Vertical Distance Between Indoor Unit and Condensing Unit

Relative Position

Value

Condensing unit installed higher than indoor unit

Maximum: 15 m (49.21 ft.)

Condensing unit installed lower than indoor unit

Maximum: 5 m (16.40 ft.)

Following are the steps that need to be observed for the regular installation of the condensing unit:

1. Place the condensing unit on the base

2. Use expansion bolts to fix the condensing unit on the base.
If there are multiple condensing units, they need to be placed on top of the other. Figure 3-13 shows
how to place the condensing units.

Following points need to be taken into consideration during the installation of the condensing unit.

NOTE:

• The condensing unit must be placed appropriately in a safe place for maintenance. It should not be

installed on the bottom floor of the public site or kept in a residential area.

• It should not be kept in an environment where noise levels are considered crucial.

• Keep the condensing unit in a clean environment, free of debris, dust, and foreign matter. This is done to

avoid blocking of the heat exchanger and ensure an efficient cooling effect.

• There should be no steam, hot gas, or exhaust gas near the condensing unit.

• Preferably, keep 450 mm between the condensing unit and the wall, obstacles, or adjacent devices. For

standard condensing unit, if the condensing unit will be installed in an outdoor environment, the
recommended distance of the back side (return air side) from the wall should be 200 mm (7.87 in.). It is
a must to provide these clearance distances to ensure appropriate airflow across the condensing unit.

• Avoid keeping the condensing unit in places where snow may accumulate in the air intake side and air

outlet side.

• Preparing a base to bear the weight of the condensing unit is important where the base should be at least

50 mm (1.97 in.) higher than the ground and 50 mm (1.97 in.) wider than the condensing unit base.

• The weight is around 44 kg (97 lbs.) for standard condensing unit or 68 kg (150 lbs.) for low ambient

condensing unit. Therefore, utmost care must be taken while removing it. Any mishandling will result in
severe injury and damage to the equipment.

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Vertiv I VRC Split System I User Manual

Figure 3-13 Installing Multiple Condensing Units with One Above the Other

3.3.3 Installing the drain fitting to the indoor unit

Fasten the drain fitting to the drain port of the indoor unit, as shown in Figure 3-14. The drain fitting
contains a sealing block, which is used for preventing the water leaking from the drain fitting port.
Make sure the sealing block is installed tightly.

Figure 3-14 Installing the Drain Fitting

Airflow

Min. 50mm [1.97 in.]

50mm

[1.97 in.]

50mm

[1.97 in.]

Bracket

Out­door
unit

Out­door
unit

Airflow

4m

[13.12 ft.]

0.2m

[0.66 ft.]

Note:

1. Use 5# angle iron for bracket, when two
units are installed with one above the other.

2. Use 6.5# channel steel for bracket, when
three units are installed with one above
another.

Drain fitting

sealing block

Drain fitting

Base

Outdoor unit base

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Vertiv I VRC Split System I User Manual

3.3.4 Installing the Condensate Pump

NOTE: Please finish the cable connection in chapter 4 first, otherwise it will be difficult to connect the cables.

1. Divide the pump bracket into part 1 and part 2, as shown in Figure 3-15 and Figure 3-16.

Figure 3-15 Appearance of Pump Bracket

Figure 3-16 Internal Structure of Water Pump Bracket

2. Install the power cord and the L-shape pipe, as shown in Figure 3-17.

Figure 3-17 Internal Structure of Water Pump Bracket

3. Loosen the four screws in Figure 3-17 for about four turns.

4. Slide the pump bracket part 1 on L-shape mounting rail, as shown in Figure 3-18.

Figure 3-18 Installation of The Pump Kit

5. Install L-shape pipe to drain fitting, and fix it with a cable tie, as shown in Figure 3-18.

6. Tighten the four screws to fix the pump bracket part 1, as shown in Figure 3-17.

7. Tighten the two screws to install pump bracket part 2 to pump bracket part 1, as shown in Figure 3-

19.

Pump bracket

part 1

Pump bracket

part 2

Pump bracket

part 1

Screws (M5 x12)

L-shape pipe

Power cord

Drain fitting

Cable tie

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Vertiv I VRC Split System I User Manual

Figure 3-19 Installation of The Pump Bracket Part 2

There are one anti-Siphoning device and a condensate water pipe in indoor unit package. The anti­Siphoning device is used to prevent siphonage and should be installed vertically on the pipe. The
condensate water pipe can be used to extend drainage lines.

Figure 3-20 Anti-Siphoning Device and Condensate Water Pipe

3.4 Connecting the Copper Pipes to the Unit

For standard condensing unit, if a deflector must be installed, install the air deflector first before
connecting the copper pipes, as shown in Figure 3-21. Otherwise, you can ignore the air deflector
installation steps.

Figure 3-21 Air Deflector Installation for Standard Condensing Unit

In this section, the general principles of connecting copper pipes, installation information about the
connectors and the required pipe connections will be explained in detail. Figure 3-22, Figure 3-23 and
Figure 3-24 show connectors on both the indoor and the condensing unit.

Pump bracket

part 2

Stainless steel pan
head screw * 4pcs

Front panel
*1pcs

Side panel
*2pcs

Air deflector

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Vertiv I VRC Split System I User Manual

General Principles

• Copper pipes with quick thread connectors must be used to connect the indoor and condensing

unit. If the pipe length exceeds the standard pipe length and a straight copper pipe is used, piping
joints must be brazed.

• Follow standard industry practices in selecting and placing pipes, evacuating the system, and

charging the system with refrigerant. The standard refrigerant of the unit is R410A. The charging
amount with low ambient condensing unit is 4.0kg (8.82 lbs), while the amount with standard
condensing unit is 1.3 kg (2.87 lbs).

• Avoid oil leakage and clogging in the system. Utmost care while considering these factors

minimizes the noise and vibration significantly.

Figure 3-22 Connectors of Indoor Unit

Figure 3-23 Connectors of Standard Condensing Unit

Figure 3-24 Connectors of Low Ambient Condensing Unit

• Use thermal insulation material to cover quick thread connectors of both indoor and condensing

Liquid pipe: 3/8''
Connector: 5/8'' -18UNF
Suction pipe: 1/2''
Connector: 3/4'' -16UNF
Drain pipe: 1/2 NPT

Liquid pipe: 3/8''
Connector: 5/8'' -18UNF

Suction pipe: 1/2''
Connector: 3/4'' -16UNF

Liquid pipe: 3/8''
Connector: 5/8'' -18UNF

Suction pipe: 1/2''
Connector: 3/4'' -16UNF

Needle valves

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Vertiv I VRC Split System I User Manual

units, after completing the installation and commission, as shown in Figure 3-25.

Figure 3-25 Keeping Copper Piping and Quick Thread Connector Insulated

Installation notes of the connector

Both top and bottom piping methods are compatible with the unit. The connectors of the unit are
located on the indoor unit and condensing unit. Utmost care must be taken while connecting the quick
thread connector.

Read the following steps thoroughly before making the connection:

• Remove the dust-proof caps.

• Wipe the coupling seats and threaded surface with a clean cloth carefully.

• Lubricate the male thread with refrigerant oil.

• Thread the coupling halves together manually (by hand) to ensure that the threads mate properly.

• Tighten the coupling body’s hexagon nut and union valve until a definite resistance is felt.

• Use a marker to draw a line lengthwise from the coupling unit to the bulkhead. Tighten the nuts

by an additional quarter turn with a wrench (22 mm for liquid pipe, 24 mm for suction pipe). The
misalignment of the lines shows how much the coupling has been tightened. The final quarter
turn is essential to ensuring that the joint doesn’t leak.

NOTE: The maximal equivalent length of piping between the indoor unit and condensing unit is 30 m (98.43

ft.).

Table 3-6 lists the equivalent length of the piping to be considered in the liquid line piping for the
bends and the elbows connector devices.

Table 3-6 Equivalent Length for Bends and Valves

Liquid pipe OD
(mm (inch))

Equivalent Length (m (ft.))

90° bend

45°bend

180° U bend

90° shut-off valve

Check valve

9.52 (3/8)

0.44
(1.44)

0.22
(0.72)

0.65
(2.13)

1.8
(5.91)

1.6
(5.25)

12.7 (1/2)

0.50
(1.64)

0.25
(0.82)

0.75
(2.46)

2.1
(6.90)

1.9
(6.23)

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Vertiv I VRC Split System I User Manual

The procedure for fitting the connectors of the condensing unit are mentioned in Figure 3-26. The
same can be replicated for fitting the connectors of the indoor unit.

Figure 3-26 Tightening the Connectors of The Condensing Unit

The recommended torque values are listed in Table 3-7.

Table 3-7 Torque Value for Tightening the Piping Connections

Coupling Size

Torque Value (Nm (ft.-lb.))

3/4” - 16UNF

25 – 32 (18-24)

5/8” - 18UNF

15 – 20 (11-15)

Required pipe connections

Following steps must be implemented during connection of the refrigerant pipe between the indoor
unit and the condensing unit.

• The liquid pipe functions as the refrigerant liquid pipe of the condensing unit outlet. Select an

appropriate pipe diameter and length for the pipe to ensure that the pressure drop of the
refrigerant liquid through the pipe during the unit operation doesn’t exceed 40kPa (5psi - 6psi).

• Install and remove the pipe with utmost care to prevent it from getting damaged. Use tube

benders and ensure that all the bends are made accurately prior to making connections to either
end.

• If the jointing mode is required, ensure all the refrigerant piping connections are made with silver

blazed joints.

• Check all the piping supports, test leakage, as well as dehydrate and evacuate the pipes before

usage. Use vibration isolation support to isolate the refrigeration pipes from the building.

• Use soft and flexible material for packing around the pipes to protect them from damage caused

due to openings in walls and to reduce vibration transmission.

• Use a thermal insulation material to cover the connecting copper piping and the quick thread

connectors of the indoor unit and condensing unit to ensure good performance of the unit.

• Connect pipes of the indoor and condensing units based on the labels. The unit adheres to the

quick connection mode.

• The unit has been charged with appropriate refrigerant and refrigerant oil (FV50S) before delivery.

However, if the connecting pipe between the condensing unit and indoor unit is longer than 10m
(32.8 ft.), add the refrigerant and refrigerant oil (FV50S) to the system to ensure normal system
operation.

Tighten with a wrench

Torque for gas line, thread 3/4'' -16UNF, 25-32 Nm (18-24 ft.-Ib.)
Torque for liquid line, thread 5/8'' -18UNF, 15-20 Nm (11-15 ft.-Ib.)

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Vertiv I VRC Split System I User Manual

• When installing the condensing unit 7.5m higher than the indoor unit, a trap should be installed

on the discharge pipe. This trap will retain refrigerant oil in the off cycle of the compressor.
When the compressor starts, oil in the trap will be carried up and return to the compressor
immediately.

Refrigerant and refrigerant oil must be added in accordance with the following formula:

Refrigerant and refrigerant oil amount to be added (kg (lbs.)) = Adding refrigerant and refrigerant
oil amount per meter of the liquid pipe (kg/m (lbs./ft.)) × [Total length of the liquid pipe (m (ft.)) –

10.0 m (32.8 ft.)]

Table 3-8 shows the refrigerant and refrigerant oil amount to be added per meter of the liquid pipe.

Table 3-8 Additional Refrigerant and Refrigerant Oil

Adding refrigerant amount per meter kg/m
(lbs./ft.)

Adding refrigerant oil (FV50S) amount per meter ml/m
(ml/ft.)

0.050 (0.034)

13.0 (4.0)

NOTE:

• Risk of oil contamination with moisture. Can cause equipment damage. VRC systems require the use of

PVE (FV50S) oil. PVE oil absorbs moisture at a much faster rate when exposed to air than previously used
oils. Because moisture is the enemy of a reliable refrigeration system, extreme care must be used when
opening systems during installation or service. If moisture is absorbed into the PVE oil, it will not be easily
removed and will not be removed through the normal evacuation process. If the oil is t oo wet, an oil
change might be required. PVE oils can act as a solvent in a refrigeration system. Maintaining system
cleanliness is extremely important because the oil tends to bring any foreign matter back to the
compressor.

• Risk of improper refrigerant charging can cause equipment damage.

3.5 Refrigerant Charge

The unit is usually pre-charged with the rated amount of refrigerant in factory, and the connectors of
the liquid and the suction lines are closed. Fill the suction and liquid pipe with 2.7 MPa(g) nitrogen at
the needle valves on suction and liquid pipe connectors, wait for at least 3 hours, and then check for
any leakage in the piping and connections. If no leakage is observed, vacuum the liquid and suction
lines at the needle valves. The absolute pressure after vacuuming should be below 20 Pa(a). Open the
connectors of the liquid and the suction lines after evacuation.

If the unit is not pre-charged, it is necessary to add refrigerant, as shown in Table 3-9. Open the
connectors of suction and liquid pipe, fill the suction and liquid pipe with 2.7 MPa(g) nitrogen at the
needle valves on suction and liquid pipe connectors, wait for at least 3 hours, and then check for any
leakage in the piping and connections. If there is no leakage observed, vacuum the unit at the needle
valves. The absolute pressure after vacuuming should be below 20 Pa(a). Add refrigerant to air
conditioner after evacuation.

For standard unit, the position of needle valves for vacuuming and charging the refrigerant is shown
in Figure 3-27.

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Vertiv I VRC Split System I User Manual

Figure 3-27 Charging the Refrigerant Gas

For low ambient condensing unit, position of needle valves for vacuuming and charging the refrigerant
is shown Figure 3-28. There is a receiver in the low ambient condensing unit. Point 1 and 2 represent
the needle valves, point 3 represents a needle valve at the inlet of the receiver depicted in Figure 3-

28. Vacuuming or charging the refrigerant from the three points simultaneously. If the vacuuming
operation is not carried out through point 3, the operation will fail.

Figure 3-28 Vacuuming and Charging for Low Ambient Condensing Unit

If it is necessary to add more refrigerant and refrigerant oil, please contact Vertiv for technical
assistance. For the exact amount of refrigerant and refrigerant oil to be charged in the system, refer to
Table 3-8 and Table 3-9.

Table 3-9 Amount of refrigerant to be charged in the system

Unit Type

Refrigerant Type

Refrigerant Charge (kg (lbs.))

VRC200/VRC300

R410A

1.30 (2.87)

VRC201/VRC301

VRC202/VRC302

VRC200/VRC350

4.00 (8.82)

VRC201/VRC351

VRC202/VRC352

Needle valves for vacuuming and
charging

Pressure gauge 2

Pressure gauge 1

Vacuum or charge

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3.6 Installation/Pre-commissioning Check List

After the unit is mounted and all the mechanical connections are completed, it is necessary to re-check
the installation as per the pre-commissioning checklist per Table 3-10.

Table 3-10 Mechanical Installation Checklist

Items

Results

Sufficient space for maintenance activities at site

All the fittings are connected firmly

The placement direction of the indoor unit is correct. The supply air is sent to the cold
aisle at the front, and the hot air is drawn back to the return air inlet of the unit at
the back

Foreign materials in and around the equipment are removed (such as shipping
materials, removed construction materials, tools, etc.)

The condensate pump and pipes are connected properly

All pipe joints are firmly fixed

All pipe connectors and fasteners are tightly fastened

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Vertiv I VRC Split System I User Manual

4 Electrical Installation

This chapter describes the electrical installation of the unit, including installation notes, cable
connection, communication cable connection and installation inspection.

4.1 Installation Notes

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, OSHA­approved 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.

4.2 Cable Connection

It is required to install circuit breakers between the unit and the power supply. The circuit breakers can
be selected based on the FLA of unit that is mentioned in Table 4-1.

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Vertiv I VRC Split System I User Manual

The cable connections for the indoor unit are operated through the cover panel at the back-side of the
unit as shown in Figure 4-1.

Figure 4-1 Cover Panel for Cabling Connections

The power cables can be selected based on the amperage ratings for each component listed in Table
4-1.

Table 4-1 Current Ratings of Components

Unit
Type

Input
Voltage

Frequency

FLA of
Compressor
(A)

FLA of Liquid
Line Solenoid
Valve (A)

FLA of Outdoor
Fan (A)

FLA of
Unit
(A)

VRC200

120 Vac

60 Hz

- - -

2.1

VRC201

208/230 Vac

60 Hz

- - -

1.7

VRC300

208/230 Vac

60 Hz

7.2 - 0.87

7.2

VRC301

208/230 Vac

60 Hz

7.2 - 0.37

7.2

VRC202

230 Vac

50/60 Hz

- - -

1.5

VRC302

230 Vac

50/60 Hz

6.5 - 0.37

6.5

VRC350

208/230 Vac

60 Hz

7.2

0.13

0.87

7.2

VRC351

208/230 Vac

60 Hz

7.2

0.08

0.37

7.2

VRC352

230 Vac

50/60 Hz

6.5

0.08

0.37

6.5

Back plate

Place for cable connection

Outdoor fan
hole

Indoor power
hole

Cover panel

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Vertiv I VRC Split System I User Manual

The cables of the indoor and the condensing units are depicted in Figure 4-2 and Figure 4-3.

Figure 4-2 Overview of the Cabling Connections (Standard Condensing Unit)

Figure 4-3 Overview of the Cabling Connections (Low Ambient Condensing)

Detailed input cabling connections of the indoor unit power terminal are shown in Figure 4-4.

Figure 4-4 Input Cabling Connections – Indoor Power Terminal

Display board

Indoor power

Outdoor power

Outdoor fan control

Communication RS485
Display board

Indoor Power

Outdoor Power

Outdoor fan control

Communication RS485

LLSV

RJ45-1/RJ45-2

Compressor
communication line

Display board plug

Terminal block for LLSV Power
and Outdoor Fan Power

Grounding
screw 2

Grounding
screw 1

Terminal block
for Input Power

Cable clamp 1

Cable clamp 3

Cable clamp 2

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Vertiv I VRC Split System I User Manual

Input cabling connections of the condensing unit power terminal block are shown in Figure 4-5.

Figure 4-5 Input Cabling Connections – Condensing Power Terminal

Detailed input cabling connections of the condensing unit electric box are shown in Figure 4-6 and
Figure 4-7.

Figure 4-6 Standard Condensing Unit Electric Connection Illustration

Figure 4-7 Low Ambient Condensing Unit Electric Connection Illustration

Cover plate

Outdoor unit
communication
terminal block

Input power
terminal block

Outdoor fan
terminal block

Sealing strip

Cross head screw
M4*10 × 8PCS

Terminal block for
Input Power

Inner cable hole

Terminal block for
Outdoor Fan Power

Grounding
screw2

Grounding

screw1

Compressor

communication

line

Cable
clamp1

Cable
clamp2

Cable
clamp3

External cable hole

Terminal block for

Input Power

Inner cable hole

Terminal block for

Grounding
screw2

Grounding screw1

Compressor

communication

line

Cable
clamp 1

Cable
clamp 2

Cable
clamp 3

External cable hole

Cable
clamp 4

Terminal block for
LLSV

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Vertiv I VRC Split System I User Manual

4.3 Communication Cable Connecting

4.3.1 Display cable connection

Two display cables shall be provided in the accessories kit. Insert one end of the cable into the display
board plug and connect the other end of the cable to the display board.

4.3.2 Communication connection

The RJ-45 cable (RS485-3) for connecting indoor and condensing unit must be provisioned by the
customer. The length of the communication line should be prepared according the actual installation
distance at site. The position and description of insert plug are shown in Figure 4-6 and Table 4-2.

There are two RJ-45 ports present on the unit for communication with third party monitoring systems
to enable remote monitoring of the unit. The RS485-1 (With 12 V power supply) could connect with
the SIC card monitoring kit. For detailed installation, please refer to RDU-SIC G2 Card Field Installation
for details. The RS485-2 is reserved, it can be used for communication with Vertiv rPDU. The
aforementioned connections are shown in Figure 4-8 and Table 4-2.

NOTE: The VRC has only one slave port for master (Modbus RTU slave). It cannot support two Modbus RTU

masters simultaneously.

Figure 4-8 Communication and Monitoring Cable Connections in the Indoor Unit

Table 4-2 Communication Port Description

Port type

RS485-1

RS485-2

Compressor Communication RS485-3

1

12 V

NC

NC
2

3

NC

NC

NC

4

GND

GND

GND
5 6 NC

NC

NC

7

D+

D+

D+

8

D-

D-

D-

SIC card

RJ-45

Reserved

RS485-2

RS485-1

Outdoor unit communication

RS485-3

Display

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Vertiv I VRC Split System I User Manual

4.4 Installation Inspection

After completing the electrical installation, inspect the installation according to Table 4-3.

Table 4-3 Installation Inspection

Items

Results

The power supply voltage meets the rated voltage on the unit nameplate

The system electric loop has no open circuit or short circuit

There must be no open-circuit or short-circuit in the electrical connections

The power cable and grounding cable to the air-break switch are connected

The ratings of the miniature circuit breakers and fuses are correct (refer to the unit
nameplates to select suitable miniature circuit breakers or fuses)

The control cables are connected firmly

All the cables connections are fastened appropriately, with no loose screws at the
connections

After confirming the above points, you can start the commissioning of the unit.

NOTE: Do not power on the unit until any Vertiv authorized technical personnel has checked and confirmed

the unit.

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Vertiv I VRC Split System I User Manual

5 Controller Operation Instructions

This chapter gives a detailed description on feature, appearance, LCD screen, control buttons, control
interface and menu structure of the air conditioner.

5.1 LCD Screen

The LCD screen displays English menus with white backlight. Figure 5-1 depicts the image of the
controller display.

Figure 5-1 Controller Display

5.2 Control Buttons

The micro-processing controller provides five control buttons, as shown in Figure 5-2.

Figure 5-2 Control Buttons

ESC button
Run indicator

Alarm indicator

Down Arrow
button

ENT button

Up Arrow
button

ON/ OFF button
LCD screen

RUN

ALARM

ENT

ESC

ENT

ESC

ESC button

Down Arrow
button

ENT button

Up Arrow
button

ON/ OFF button

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Vertiv I VRC Split System I User Manual

The functions of the control buttons are described in Table 5-1.

Table 5-1 Functional Description of the Controller Buttons

Key

Function Description

ON/OFF

Switch on/off the controller by pressing and holding the key for 3s

ENT
(Enter
button)

Enter the selected menu screen. Validate the parameter setting value
ESC

Exit the current menu and return to the normal screen or the previous menu screen. Abort
parameter change. Make the audible alarm silent

Up button

Move the cursor up or increase the parameter value. For a toggle selection: scroll through the
options. For a multi-screen menu: scroll up the screen

Down
button

Move the cursor down or decrease the parameter value. For a toggle selection: scroll through
the options. For a multi-screen menu: scroll down the screen

5.3 ON Screen

After the unit is powered on, the LCD screen will display the ON screen, and you can choose English or
Chinese on the display board.

5.4 Normal Screen

After the unit is powered on, the Normal screen will be displayed after 10 seconds, as shown in Figure
5-3. The temperature units of VRC200, VRC201 and VRC202 are Fahrenheit, Fahrenheit and Celsius,

respectively. The VRC200 is used as an example.

Figure 5-3 Normal Screen

In the upper half of the screen, the settings and the actual supply air temperature are displayed in the
first column, humidity in the second column, and return air temperature in the third column.

In the lower part of the screen, the unit output status (fan, cooling) and unit operation status (off,
running, standby locked) are displayed.

The icons on the main screen indicate the unit output status, unit property, and unit operating status.
The icons and their definitions are displayed in Table 5-2.

SUP 68 SUP - - % RET 90

70

- -

% 86

75

%

S /

ON

ACT

63

%

℉
℉

℉
℉

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Vertiv I VRC Split System I User Manual

Table 5-2 Controller Display Icon Details

Icons

Definitions

Fan rotating speed. The percentage of actual fan rotating speed

Compressor capacity. The percentage of actual compressor capacity

Unit property/operation status. S: single; ON: running; R-OFF: remote shutdown; L-OFF:
local shutdown; M-OFF: monitoring shutdown; MANU: manual mode; BKUP: backup; Lock:
Alarm lock

5.5 Unit Working Icons

The icons and their definitions are listed in Table 5-3.

Table 5-3 Description of Icons

Icon

Description

SUP

Supply air temperature setpoint

ACT

Actual air temperature

RET

Specified return temperature

The cooling output of compressor

Rotating speed rate of the fan, ranging from 30% to 100%

Unit attribute/running state. S: standalone; RUN: running; OFF: shutdown

5.6 Menu

Alarm Menu

Select Alarm Menu on Main Menu screen to enter the screen as shown in Figure 5-4. Press the Up or
Down button to scroll up or down the menu items.

<ALM Set>

<ALM Status>
<HP Abnormal>

Figure 5-4 Alarm Menu

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Vertiv I VRC Split System I User Manual

Alarm Status

The alarm status menu is used to monitor the current alarm status of the air conditioner unit. Alarm
or specific alarm information will not be displayed. The specific alarm information includes XX/YY,
alarm type, and alarm generation time, as shown in Figure 5-5. XX indicates the alarm serial number
(SN), and YY indicates the total number of reported alarms.

Figure 5-5 Current Alarm Menu

NOTE:

• The latest alarm SN is the biggest number. Press the Up or Down button to scroll through the alarm status

records if more than one alarm is activated.

• The current alarms are automatically cleared upon system power failure.

Alarm Set

On the Alarm Set menu, select to enter the alarm setup screen. Use the Up or Down key to query menu
items. The alarm setup menu includes Alarm Setpoint, System Alarms, and Alarm Handle, as shown in
Figure 5-6, Figure 5-7 and Figure 5-8. Parameter settings can be saved permanently.

Lo Sup Temp

Hi Sup Temp 80.6

Hi Ret Temp

℉

46.4
86

℉
℉

Figure 5-6 Items of the Alarm Value Setup Menu

Lo Sup Temp

Hi Sup Temp

ON
ON
ON
ON

Hi Ret Temp
Water HL

Figure 5-7 Items of the System Alarm Attribute Setup Menu

Clr HP Abnor

Filt Maint

Yes

No

Figure 5-8 Items of Alarm Handle Attribute Menu

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Vertiv I VRC Split System I User Manual

Temp Set

Select Main Menu > Temp Set to enter the screen as shown in Figure 5-9. The Temperature Setting
values will be permanently saved.

Ret Stpt

Sup Stpt

Ctrl Mode

Sup Air

Temp DB

60.8

℉

82.4

0.9

℉
℉

Cool Prop

9

℉

Figure 5-9 Temp & Hum Set Menu

NOTE:

• The specified temperature value is the target temperature for ensuring normal system running. When

the control mode is set to return or supply air, the specified temperature is the temperature of the return
air or supply air.

• The default control mode of the unit is return air control mode, and the setpoint is 25 °C (77 °F).

• If the indoor unit is used in the open rack, it is recommended to use return air control mode.

• If the indoor unit is used in the closed rack, it is recommended to use supply air control mode.

System Status

Select Main Menu > System State to enter the System State menu, as shown in Figure 5-10.

Fan 23 h
Comp 0

h

Figure 5-10 System Status

Run Time

You can query the operation time of the device on this menu, as shown in Figure 5-11.

<

Run Time

>

Figure 5-11 Run Time Menu

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Vertiv I VRC Split System I User Manual

Help Menu

The menu includes Date &Time information. You can view the relevant information, as shown in Figure
5-12.

<

Date&Time

>

Figure 5-12 Date & Time Menu

Date

2018

1

12

1

Date
Date

Time

(D)
(H)

(Y)

(M)

Time

20
30

Time

(M)

(S)

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Vertiv I VRC Split System I User Manual

PART III

SYSTEM OPERATION &

GENERAL MAINTENANCE

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6 Startup Commissioning

This chapter describes the startup commissioning, including specific operations.

6.1 Preparations Before Commissioning

6.1.1 Mechanical Part

• Ensure all valves are open in the refrigerant lines as per their initial valve opening set-points.

• Ensure that the amount of refrigerant charged inside the system is correct.

• Connect the condensate water drain system piping and inspect for any leakages in the connections.

• Ensure that the unit has a heat load of at least 0.9 KW. If not, use other heating devices that

compensate for the heat load to ensure necessary amount of heat load for commissioning.

6.1.2 Electronic part

• Ensure that the input voltage of the main power supply is within ± 10% of the rated voltage and

that the power disconnector is closed.

• Ensure that all electrical or control connections are correct and tighten all electrical and control

connectors.

• Ensure that the power cable and low-voltage control cable are separately arranged and far from

electromagnetic noise sources.

6.2 Start-up Inspection Checklist

Before powering up the unit, perform the mechanical and electrical inspections according to Table 6-

1.

Table 6-1 Start-Up Inspection Checklist

Inspection

Items

Remarks

Mechanical
inspection

The indoor unit and condensing unit have been connected as an entire system
All valves in system have been opened fully

Refrigerant and oil have been added as instructed

Drainage pipe has been connected properly and tightly

There is heat load for AC operating, if not, please increase the heat load by
some devices, such as heaters

Electrical
inspection

The AC mains voltage and frequency are normal, and the AC mains correction is
correct without any short circuit

All electrical or control connections are correct and tight

6.3 System Commissioning

The indoor and condensing units have been charged with the rated amount of refrigerant in factory,
when the indoor unit and condensing unit have been connected as an entire system at sites. Follow
the steps below to ensure the normal operation of the unit:

• Close all the circuit breakers of the unit only after a careful inspection of the entire unit installation.

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Vertiv I VRC Split System I User Manual

• Press and hold the ON button on the display board for 3 seconds to power up the unit.

• Pay attention to the controller display to ensure that no alarms or warnings is displayed.

• Ensure that the operating status of compressor, evaporator fan and condenser fan is smooth and

that there are no vibrations or any kind of noise from any of these components.

• Observe and monitor whether the system parameters are within the normal range, such as return

air temperature and supply air temperature etc. as per the set operational functionality.

• If any abnormal operation is noticed, stop the unit by pressing the ON/OFF button on the display

board for 3 seconds to disconnect all circuit breakers.

6.4 Commissioning Complete Inspection

Check according to Table 6-2 after commissioning.

Table 6-2 Checklist After Commissioning

Inspection Items

Inspection Results

All outputs are functional

The temperature settings are correct and are controlled within range

There is no abnormal alarms or warnings on the controller

All the other functions are set correctly

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Vertiv I VRC Split System I User Manual

7 System Operation and Maintenance

Periodic system maintenance is crucial to ensure product reliability and validity. This chapter expounds
the system maintenance of the air conditioner, including safety instructions, electric inspection, indoor
unit maintenance, outdoor unit maintenance, electrical connection maintenance, cooling system
maintenance, system diagnosis testing and maintenance inspection checklist.

7.1 Safety Instructions

Following are the safety instructions that need to be observed during the maintenance process:

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.

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 Vertiv­approved components.

7.2 Electrical Inspection

Inspect the control board and temperature sensor every 6 months for loose electrical connections and
circuit corrosion.

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Vertiv I VRC Split System I User Manual

Following are the steps to inspect the boards:

 Firmly tighten all the electrical contacts.
 Clean the electrical and control components with a brush or by using compressed dry air.

7.3 Indoor Unit Maintenance

7.3.1 Evaporator Fan

Since the fan operates 24/7 throughout the year, any unusual airflow obstruction must be cleared in
time to avoid damage to the cooling system and other system components caused by reduced air
volume. Periodic inspection covers the state of the fan impellers, fastening of fan components,
abnormal noise of the fan, and cable connection of the fan.

Do not operate and maintain the fan in a running condition to avoid any injury to the operator
or any damage to the fan blades.

7.3.2 Return Air Filter

The return air filter is mounted on the back side of the indoor unit, as shown in Figure 7-1. To ensure
the normal operation of the filter, the filter service alarm logic is provided by the controller. The default
fan running time is 2000 hours (settable according to the local running environment). When the time
is exceeded, the filter service alarm is triggered. The filter needs to be replaced based on its clogged
condition. The filter must be checked for its condition once a month and be replaced as required.

Figure 7-1 Return Air Filter

7.3.3 Drainage Pump

Inspect the drain pipe for normal operation. Ensure no pipe buckling is present. If the pipe buckling
happens, the new pipe should be used. Ensure that reservoir, pump filter, and inlet tube are free of
sludge and debris. If not, please clean it.

Figure7-2 Condensate Pump Kit

Return air filter

Pump brackets

Pump
Pump reservoir

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Vertiv I VRC Split System I User Manual

Figure 7-3 Pump Filter

7.4 Condensing Unit Maintenance

7.4.1 Condenser

• Sometimes the airflow through the condensing unit is restricted. In such a scenario, use

compressed air or a fin cleaner (alkalescency) to clean the dust and debris that inhibit airflow off
the condenser. The compressed air should be blown in the reverse airflow direction.

• Check for bent or damaged fins and repair them, if necessary.

• Check the connection refrigerant pipes for signs of oil leakage and rectify it if any leakage is found.

7.4.2 Compressor

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.

The compressor faults can be categorized into two types:

• Motor faults (such as winding burnout, insulation failure, short circuit between coils, etc.)

• Mechanical faults (such as compressor failure, relief valve faults, etc.)

If the operating pressure is not established, it means that the compressor has failed. Confirm if the
suction pressure and discharge pressure are balanced and verify that the motor does not rotate
reversely. The controller is streamlined with capabilities like powerful alarm and protection functions
to ensure safe operation of the compressor. Periodic checks of high pressure and low pressure along
with alarm protection for such pressure-related issues should be carried out by maintenance personnel
on a regular basis to rule out discrepancies.

7.4.3 Condenser Fan

The monthly inspection items of the fan include: motor operation status, impeller status, fan fixation
and clearance between fan and impeller. Inspect the motor bearing and impeller monthly and replace
it if any damaged impeller is found. Check that the impeller is tightly mounted on the rotor of the
motor and does not rub against its neighboring metal components during rotation. Since the fan kit
operates 24 hours every day continuously, any unusual airflow obstruction must be cleared in time to
avoid the damage to the cooling system and other system components caused by reduced air volume.

7.4.4 Receiver and Heating Belt

Periodically check the liquid level of the refrigerant in fluid reservoir to ensure that no refrigerant
leakage happens. For detailed operation, refer to 6.3 Check Refrigerant Charge Capacity of Low

Pump filter

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Ambient Condensing Unit.

Periodically check whether the heating belt works normally. When the system is powered on and
standby, and the high pressure is lower than 1.2 MPa, the heating belt preheats the receiver. If the
heating does not happen, check whether the heating belt or the pressure switch works normally. After
confirming the fault part(s), replace it or them.

NOTE:

• Wear long rubber gloves to handle contaminated parts.

• The air conditioning system contains refrigerant and the release of refrigerant to the atmosphere is

harmful to the environment.

7.5 Electrical Connection Maintenance

7.5.1 Electrical Maintenance

Check the appearance to the electrical connections and take actions according to the following
procedures:

 Conduct overall electrical insulation test: find out the non-insulated contacts and rectify them

with proper insulation covering.

 Disconnect all the fuses or MCBs of the control part during the test as the high supply voltage may

damage the control components.

 Clean the electrical panel and control panel boards from dust with a brush or by blowing low

pressure dry compressed air.

 Properly fasten all the electric connection terminals.
 Check that the sockets and plugs are in good condition. Replace the loose ones with new sockets

and plugs.

 If the power cables are damaged, the cables must be replaced by professional personnel to avoid

any non-standard installation practices.

7.5.2 Controller Connections Maintenance

Check the appearance to the control part and take actions according to the following procedures:

 Check the appearance of the power module and measure the output voltage.
 Check if the surface and interface of power protector board, ICOM edge controller board, EEV

controller board, EMI board, and compressor inverter board show any signs of aging or wear &
tear.

 Clean up dust and dirt from the electrical control components and control board with a brush

using an electronic dust cleaning agent.

 Check and fasten the input and output connectors of the power protector board, ICOM edge

controller board, EEV controller board, EMI board, and compressor inverter board.

 Check whether the fan power cable and rotating speed feedback signal cable are firmly fixed.
 Check whether the interconnection terminals between the control interface board and the

temperature sensor or pressure transducer are firmly fixed. If there is any loose, poor contact, or
fault, immediately replace the interconnection terminal.

 Replace the faulty electrical components such as the control fuse (or air breaker) and control

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Vertiv I VRC Split System I User Manual

board.

 Use the temperature measurement meter with high measurement precision to measure and

calibrate the reading of the temperature sensor.

 Adjust the set points. Check the motion of each functional component according to the control

logic.

7.6 Cooling System Maintenance

The components of the cooling system must be inspected for any abnormalities in the operation
causing abrasions due to continuous operation. As the failure or damage of components is usually
accompanied by corresponding faults, regular checking needs to be carried out to prevent most of the
system faults.

The surface of the evaporator coil should be kept clean and have no rupture.

The major reasons for electronic expansion valve failure are related to electrical failure and/or
mechanical failure. The electrical failure may be attributed to the failure of the power supply of the
electronic expansion valve control panel and coil, loosely connected control board wiring pressure,
and temperature sensor failure. The mechanical failure may be the effect of blockage in the refrigerant
flow in an electronic expansion valve. Therefore, when the electronic expansion valve is faulty, pay
close attention to the control panel power supply, control board wiring, pressure and temperature
sensor wiring or the valve itself.

Refrigerant pipes must be properly fixed and should not vibrate against the wall, floor or the unit frame.
Inspect all refrigerant pipes and fixing bracket every six months for signs of wear.

7.7 Leakage Detection (F-gas)

For countries covered by the F-gas regulation, when the low ambient condensing unit (VRC352) is used,
both the indoor unit (VRC202) and the low ambient condensing unit should be checked for leakages
once a year according to mandatory rules. There are three holes in the indoor unit for detection, as
shown in Figure 7-4 and Figure 7-5.

The following section is a step-by-step illustration of the process of leak detection.

1. Remove the 8 screws, grille, water leakage detection board, and 2 rubber bushing in Figure 7-4

one by one.

2. Remove the 3 screws and cover plate in Figure 7-5.

3. Insert the sniffer into the VRC202 unit to check whether the refrigerant leaks in the areas in Figure

7-6. Check detection area (front) and detection area (rear) from the front and rear of the VRC202
unit, respectively.

4. Restore the VRC202 unit to its original state after the check is completed.

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Vertiv I VRC Split System I User Manual

Figure 7-4 Detection Holes in VRC202 (Front)

Figure 7-5 Detection Holes in VRC202 (Rear)

Figure 7-6 Detection Area in VRC202 (Rear)

7.8 System Diagnosis Testing

The microprocessor controller supports the manual mode and provides diagnostic functions such as
manually enabling and disabling parts. Such functions can be used to detect states of the system
functional parts.

Detection hole 2*pcs

Rubber bushing 2*pcs

Screw M3×8 * 8pcs

Water leakage detection board

Screw M4×10 * 3pcs

Cover plate 1*pcs

Detection hole 1*pcs

Detection area (rear)

Detection area (front)

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Vertiv I VRC Split System I User Manual

7.9 Maintenance Inspection Checklist

The maintenance checklist of the unit is provided in Table 7-1.

Table 7-1 Maintenance Checklist

VRC2/3

Date

Prepared by

Model

Serial Number

Type

Maintenance
Components:

Item

Result

Monthly:

Return air filter
Check for restricted air flow

Check the filter cleanliness

Clean the filter

Evaporator fan
and condenser
fan

Check if fan blades are distorted

Check if the fan generates any noise during operation

Check if the fan has stoped rotating

Check and fasten the circuit connector

The fan base should be firm

Drainage pump

Check whether filter is clogged or damaged

Clean the filter

Check whether the pipes are loose

Check whether there are impurities and debris in the water tray

Check the drain pump connection line for clogging

Check whether the cable of the drain pump is loose

Semi­annually:

Compressor
Check if there is any signs of oil leakage

Check if there is abnormal vibration and noise of compressor

Condenser

Check the fins cleanness

Low ambient kit

Check if there is leakage

Check if heating belt works normally

Check if

pressure switch works normally

Check if the liquid line solenoid valve

wor

ks normally

Cooling system

Check suction pressure

Check discharge pressure

Check that there is no superheat

Check that there is no leakage in connection pipes

Charging the capacity of refrigerant

Electrical
control part

Check if the main circuit breaker and the circuit breaker cable of
the power module are tightly connected

Check and fasten the circuit connector

Check if the cables and the meter reading of each sensor are
within prescribed range

EEV electric
board

Check if the wiring and coil of the electronic expansion valve
control board are loose

Check electrical connections

Check the surface for signs of corrosion

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8 Troubleshooting

This chapter introduces the failure diagnosis and troubleshooting and can be used together with the
alarm section in Chapter 5.

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.

8.1 Troubleshooting

Trouble Shooting for the entire unit is listed in Table 8-1.

Table 8-1 Troubleshooting

Fault Occurrence

Possible Cause

Check or Remedy

High
temperature
alarm

Unreasonably high temperature
alarm setpoint

Check and reset high temperature alarm
setpoint

Overload condition

Check if the max. actual heating load is over
the rated value

Condenser fan does not run
normally or is faulty

Check if the fan power cable is disconnected

Compressor does not run
normally

Check if the compressor power cable is
disconnected

Low
temperature
alarm

Unreasonably low temperature
alarm setpoint

Check and reset low temperature alarm
setpoint

Evaporator fan does not run
normally or is faulty

Check if the fan power cable is disconnected

Compressor does not run
normally

Check if the compressor power cable is
disconnected

High pressure
alarm

Condenser fan does not run
normally or is faulty

Check if the fan power cable is disconnected

High pressure transducer is
abnormal

Check if the high pressure transducer is
normal

Insufficient condensing airflow
Remove debris from the coil and air inlet

Check if the fan speed controller operates
normally

Low pressure
alarm

Refrigerant leakage

Check for leaking points and re-charge
refrigerant

Condenser fan runs at full speed
when ambient temperature is
too low

Check if wire connection of outdoor fan is
reversed

EEV adjusts abnormally or is
closed

Check if the EEV coil or EEV cable is loose

Evaporator fan does not run
normally or is faulty

Check if the cable of fan is disconnected

Insufficient airflow across
evaporator coil

Remove debris from the coil and air inlet

The air humidity is too high

Use other dehumidifier to control the air
humidity

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Vertiv I VRC Split System I User Manual

Fault Occurrence

Possible Cause

Check or Remedy

Severe
condensation or
water leakage

EEV adjusts abnormally

Check if the EEV coil or EEV cable is loose

Compressor runs at high speed

Check if the compressor is out of control

The drainage pan or pipe is loose
or blocked

Check if drainage pipe is loose or clean the
debris in the drainage pan or pipe

Compressor
vibration or
abnormal noise

The mounting position is not
even

Check mounting position state

The fixing parts are loose

Check the fixing nuts of compressor and
fasten again

Compressor is faulty

Call the customer service hotline of Vertiv

8.2 Fan Troubleshooting

The fan troubleshooting is listed in Table 8-2

Table 8-2 Fan Fault Diagnosis and Handling

Symptom

Probable Causes

Check Items and Handling Methods

EC fan can’t
be started

The circuit breaker
is open

Check if the circuit breaker is closed

Fan power module
failure

Check the alarm indicator of the fan power module to if the control
board fails

The cable is faulty



Check if the cable from the main control board, fan fault detection
board, or power module to the control terminal bar is firmly fixed



Check if the cable from the control terminal bar to the plug wire
terminal of the fan is firmly fixed

8.3 Fault Diagnosis and Handling of Electronic Expansion Valve

As a key component for refrigerant system and cooling capacity adjustment, the working of the
electronic expansion valve is important. Table 8-3 describes the fault diagnosis and handling methods.

Table 8-3 Fault Diagnosis and Handling Methods

Symptom

Probable Causes

Check Items and Handling Methods

The
adjustment of
the electronic
expansion
valve is faulty
The temperature
sensor or pressure
transducer is faulty



Check if the sensor cable is firmly fixed



Check if the sensor cable position on the control board is
correct

The control board is
powered off



Check if the output fuse of the transformer has tripped/broken



Check if the input power of the control board of the electronic
expansion valve is of 24 V power supply

The cable connection
of the control board
is faulty



Check if the valve cable connection on the control board of the
electronic expansion valve is faulty



Check if the communication cable between the electronic
expansion valve control board and the main control board is
properly connected

8.4 Fault Diagnosis and Handling of the Air Conditioning System

When the air conditioning system component is faulty, identify the causes and tackle the problem to

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Vertiv I VRC Split System I User Manual

ensure normal operation of the unit. Table 8-4 describes the major faults and troubleshooting
methods.

Table 8-4 Refrigeration System Faults and Troubleshooting Methods

Symptom

Probable Causes

Check Items and Handling Methods

The surface of the
evaporator has
serious
condensation

The surface of the
evaporator is filth blocked

Check the surface of the evaporator. Blockage may
result in non-smooth discharge of the condensate
water

Air volume
decrease

The air filter is blocked

Periodically check the filter and replace it in a timely
manner to avoid air volume attenuation due to filth
blockage

The fan is faulty

Check if the fan is faulty. Table 8-1 describes the
diagnosis and handling methods

The evaporator is blocked

Check the surface of the micro-channel evaporator and
periodically handle the blockage problem

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Vertiv I VRC Split System I User Manual

Appendix I: System Diagram (Standard Unit)

Condenser

Outdoor unit

Discharge temperature
switch

Service
valve

Service
valve

High pressure
switch

Liquid quick
connector

Compressor

Gas quick
connector

Electronic expansion
valve

Evaporator

Distributor

Suction temperature
sensor

Gas line

Liquid line

Indoor unit

Low pressure
transducer

High pressure
transducer

Liquid quick
connector

Interconnecting piping

Gas quick
connector

Service
valve

Service
valve

Trap

Gas line Liquid line 7.5 m (24.6 ft)

For rising over 7.5
m (24.6 ft), trap
every 7.5 m (24.6
ft) or evenly
divided

Service
valve

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Vertiv I VRC Split System I User Manual

Appendix II: System Diagram (Low Ambient Unit)

Condenser

Outdoor unit
Check valve

Head
pressure
valve

Discharge
temperature
switch

Service
valve

Relief
valve

Pressure
switch

Solenoid
valve

Service
valve

High pressure
switch

Receiver

Service
valve

Liquid Quick
Connector

Electric
heating belt

Compressor

Gas quick
connector

Electronic expansion
valve

Evaporator

Distributor

Suction temperature
sensor

Gas line

Liquid line

Indoor unit

Low pressure
transducer

High pressure
transducer

Liquid quick connector

Interconnecting piping

Gas quick connector

Service
valve

Service
valve

Trap

Gas line Liquid line 7.5 m (24.6 ft)

For rising over 7.5
m (24.6 ft), trap
every 7.5 m (24.6
ft) or evenly
divided

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Vertiv I VRC Split System I User Manual

Appendix III: Wiring Diagram (VRC200/VRC201 Unit)

AC/DC power

Power protector

ACM02A1

Supply air temp. sensor

Return air temp. sensor

High pressure

transducer HPS

Water level sensor

WLS

ICOM edge

Controller
ACM05U1

EEV controller

Low pressure

transducer LPS

Indoor fan

Suction temp. sensor

EMI filter

ACM02X2

Terminal

Compressor

Communicatio

compressor

communicatio

Display

MBV outdoor fan

Earth ground
connection

Connection panel

Earth ground
connection

Line voltage

1 phase supply

See unit nameplate
for main supply wire

RDU-C

RDU-C

EEV

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Vertiv I VRC Split System I User Manual

Appendix IV:Wiring Diagram (VRC300/VRC301 Unit)

Inductor

L1

Compressor
inverter

Compressor

High pressure

switch

Temp. switch

Capacitor

Outdoor fan

EMI filter

Earth ground

connection

Connection panel

Earth ground

connection

Compressor

communication

Compressor

communication

Outdoor fan

See unit nameplate for
main supply wire sizing

Line voltage

1 phase supply

CON1

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Vertiv I VRC Split System I User Manual

Appendix V:Wiring Diagram (VRC350/VRC351 Unit)

Inductor

L1

Compressor
inverter

Compressor

High pressure

switch

Temp. switch

Capacitor

Outdoor fan

LLSV

EMI filter

RHTR

Earth ground
connection

Connection panel

Earth ground

connection

Compressor

communication

Low pressure

switch

Compressor

communication

LLSV outdoor fan

See unit nameplate for
main supply wire sizing

Line voltage

1 phase supply

CON1

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Vertiv I VRC Split System I User Manual

Appendix VI:Wiring Diagram (VRC202 Unit)

AC/DC power module

Power protector

ACM02A1

Supply air temp. sensor

Return air temp. sensor

High pressure

transducer HPS

Water level sensor

WLS

ICOM edge

Controller
ACM05U1

EEV controller

Low pressure

transducer LPS

Indoor fan

Suction temp. sensor

EMI filter
ACM02X2

Terminal block

Compressor

communication

Compressor

communication

Display

LLSV outdoor fan

Earth ground connection

Connection panel

Earth ground connection

Line voltage

1 phase supply

See unit nameplate for
main supply wire sizing

RDU-C
RDU-SIC

RDU-C

EEV

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Vertiv I VRC Split System I User Manual

Appendix VII:Wiring Diagram (VRC302 Unit)

Inductor

L2

Inductor

L1

Compressor

inverter

Compressor

High pressure

switch

Temp. switch

Capacitor

Outdoor fan

EMI filter

Earth ground

connection

Connection panel

Earth ground

connection

Compressor

communication

Compressor

communication

Outdoor fan

See unit nameplate for

main supply wire sizing

Line voltage

1 phase supply

CON1

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Vertiv I VRC Split System I User Manual

Appendix VIII:Wiring Diagram (VRC352 Unit)

Inductor

L2

Inductor

L1

Compressor
inverter

Compressor

High pressure

switch

Temp. switch

Capacitor

Outdoor fan

LLSV

EMI filter

RHTR

Earth ground
connection

Connection panel

Earth ground

connection

Compressor

communication

Low pressure

switch

Compressor

communication

LLSV outdoor fan

See unit nameplate

for main supply wire

sizing

Line voltage

1 phase supply

CON1

Suppliers Declaration of Conformity

Unique Identifier: VRC200, VRC201, VRC300, VRC301, VRC350, VRC351

Party Issuing Supplier’s Declaration of Conformity

Vertiv Group Corp.

1050 Dearborn Drive

Columbus, OH 43085

US

Customer service hotline: [phone]

FCC Compliance Statement (for products subject to Part 15)

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1)
This device may not cause harmful interference (2) this device must accept any interference received,
including interference that may cause undesired operation.

Note:

Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates, uses
can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications. Operation of this equipment in a residential area
is likely to cause harmful interference in which case the user will be required to correct the interference at his
own expense.

Vertiv.com I 1-4/F, 6-10F, Block B2, Nanshan I Park, No.1001 Xueyuan Road, Nanshan District, 518055 Shenzhen,
Guangdong, CHINA

© 2020 Vertiv Group Corp. All rights reserved. Vertiv and the Vertiv logo are trademarks or registered trademarks of
Vertiv Group Corp. All other names and logos referred to are trade names, trademarks or registered trademarks of their
respective owners. While every precaution has been taken to ensure accuracy and completeness here, Vertiv Group
Corp. assumes no responsibility, and disclaims all liability, for damages resulting from use of this information or for any
errors or omissions. Specifications are subject to change without notice.

V1.3 / REV 26-08-2020 / Code-31014128