Installation

2.6Electrical Connections

Three-phase electrical service is required for all models in either 208, 230, 460, or 575 V, 60 Hz; or 200, 230, or 380/415 V, 50 Hz. Electrical service shall conform to national and local electrical codes. Refer to equipment nameplate regarding wire size and circuit protection requirements. Refer to elec- trical schematic when making connections.

A manual electrical disconnect switch should be installed within 5 feet (1.6 m) of the Liebert Chal- lenger ITR in accordance with codes. A factory-supplied, locking disconnect switch is factory-mounted within the unit behind the front door.

! WARNING

Risk of electric shock. Can cause injury or death.

Disconnect all local and remote electric power before working within the unit. Use a voltmeter to make sure power is turned off before making any electrical connections.

NOTICE

Three-phase power must be connected to the Liebert Challenger ITR line voltage terminals in the proper sequence so that scroll the compressor rotates in the proper direction.

Figure 8 Electrical connections

1

Electrical Handy Box* (factory-installed with cover)

15

70

271

 

3

7

4

 

Terminal Block*

6 5 1

(for customer connections)

8

8

9

9

10

13

14

16

17

12

13

11

37C 38C 37B

38B 37 38

24 50 51 55

56

77 78

75 76 82 83 84 85 88 89 91

92

93 94 95 96

97

1

2 3

4

DPN001524

REV 0

1.Electric conduit knockouts on top and bottom of electric box. Knockout size 1-3/4" (44.5mm).

2.Three phase connection. Electric service connection terminals when factory disconnect switch is supplied.

3.Factory-installed locking disconnect switch.

4.Three-phase electric service not by Liebert.

5.Earth ground connection (50/60Hz). Connection terminal for field-supplied earth grounding wire.

6.Earth ground bar (50Hz only). Connection terminals with factory ground from each high voltage component for field supplied earth grounding wire.

7.Control and monitoring section of electric box.

8.Remote unit shutdown. Replace existing jumper between Terminals 37 + 38 with normally closed switch having a minimum 75VA, 24VAC rating. Use field-supplied Class 1 wiring. Two additional contact pairs available as an option (labeled as 37B & 38B, 37C & 38C). Replace existing jumper for appropriate pair as done for 37 & 38.

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Liebert ITR installation manual Electrical Connections, Electrical connections

ITR specifications

The Liebert ITR is an advanced precision cooling unit designed to maintain optimal temperature and humidity levels in mission-critical environments. Engineered for high-performance applications, it is particularly suitable for data centers, telecommunications facilities, and other spaces that require precise climate control to ensure uninterrupted operation of sensitive equipment.

One of the main features of the Liebert ITR is its modular design. This allows for scalability and flexibility, enabling users to customize the system based on their specific cooling needs. The unit can be configured in various sizes and cooling capacities, making it suitable for both small server rooms and large data centers. This adaptability is crucial for organizations that anticipate growth and require an efficient cooling solution that can evolve with their infrastructure.

The Liebert ITR incorporates state-of-the-art technologies to enhance performance and energy efficiency. Among these technologies is the use of a variable speed compressor that adjusts its speed based on the cooling load. This capability not only improves energy efficiency but also significantly reduces operational costs by minimizing electricity consumption when cooling demands fluctuate.

Additionally, the unit features advanced control systems that provide intelligent monitoring and management of temperature and humidity levels. These systems can integrate seamlessly with building management systems (BMS) and can be operated remotely, providing users with real-time insights into the performance of the cooling system. Such connectivity ensures quick identification and resolution of potential issues, thereby reducing downtime and maintaining optimal conditions for critical equipment.

The Liebert ITR utilizes eco-friendly refrigerants, contributing to reduced environmental impact while ensuring compliance with regulatory standards. The unit's design also emphasizes reliability, featuring robust construction and redundant components that enhance longevity and minimize the likelihood of failures.

Furthermore, the Liebert ITR is equipped with advanced filtration systems that maintain air quality by reducing particulate matter and contaminants, ensuring that the atmosphere within data centers is not only cool but also clean—critical for the longevity of sensitive electronic equipment.

Overall, the Liebert ITR is characterized by its innovative design, energy-efficient operation, and comprehensive control capabilities, making it an ideal choice for businesses looking to safeguard their critical infrastructure from overheating and humidity. As climate control becomes increasingly important in the digital age, the Liebert ITR stands out as a reliable solution for maintaining optimal environmental conditions.