Liebert ITR Balancing the Air Distribution, Ducted Applications, Plenum Installation

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Installation

9.Special alarm connections. Field-supplied 24V Class 1 wiring for special alarm. Connection made by adding normally open contacts between terminals 24 + 50. Optional additional connections available with Advanced or Advanced with Graphics controls and appropriate optional accessories (connections 51, 55, and 56).

10.Liebert SiteScan® connection. Terminals 77 (-) and 78 (+) are for connection of a 2-wire, twisted pair, communication cable (available from Liebert or others) to optional Liebert SiteScan.

11.Remote condensing unit connection. Field-supplied 24V Class 1 wiring to remote condensing unit terminals 1, 2, 3, & 4 from (R2) relay (split system only).

12.Smoke detector alarm connections. Field-supplied 24V Class 1 wiring to remote alarm circuits. Factory-wired contacts from optional smoke detector are #91-comm., #92-NO, and #93-NC.

13.Common alarm connection. Field-supplied 24V Class 1 wiring to common alarm terminals 75 + 76 (and optional 94 + 95, and 96 + 97), which are factory-connected to common alarm relay (R3).

14.Reheat and Humidifier Lockout. Optional emergency power lockout of reheat and/or humidifier: connections provided for remote 24V AC source.

15.Heat rejection connection. Field-supplied 24V Class 1 wiring to interlock heat rejection from pigtails 70 + 71 which are factory-connected to compressor side switch (self-contained units only and to Glycool relay (R5), Glycool units only).

16.Main Fan Auxiliary Switch. Optional main fan auxiliary side switch. Terminals located in field wiring compartment for remote indication that the evaporator fan motor/unit is on. Field to connect 24V maximum.

17.Optional Condensate Alarm (Dual Float Condensate Pump only). Relay terminals located in field wiring compartment for remote indication.

*Located inside Liebert Challenger ITR on top.

NOTE: Refer to specification sheet for full load amp. and wire size amp. ratings.

2.7Balancing the Air Distribution

2.7.1Ducted Applications

For ducted applications, the duct work may be attached to the top perimeter of the Liebert Challenger ITR (see Figure 2).

The duct work must allow access to the motors/blowers for maintenance. The duct work must be designed within the capacity of the Liebert Challenger ITR, otherwise air flow and performance will be compromised.

2.7.2Plenum Installation

A solid plenum or plenum with discharge grille(s) may be installed. The plenum and instructions for its installation ship separately from the Liebert Challenger ITR.

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Contents Liebert Challenger ITR Page Table of Contents Chilled Water Models Split System ModelsR407C Refrigerant Figures Tables System Descriptions Equipment Inspection Remote Sensor Installation LocationRoom Preparation Location ConsiderationsRemoval of Skid Unit shipping weightsHandling With Skid Domestic Export Model Lb kg 50Hz Models 60Hz ModelsCabinet dimensions Unit WeightSL-11897 Piping Considerations Drain LinePiping connection size Piping Outlet Locations Piping connections for split system fan coil units Piping connections for water/glycol and Glycool units Piping connections for chilled water self-contained units Electrical Connections Electrical connectionsPlenum Installation Balancing the Air DistributionDucted Applications Checklist for Completed Installation Low Voltage Condenser LocationLine Voltage Lee-Temp/Flood Back Head Pressure Control CondensersAir-cooled condenser statistics 23 & 33 kW 067A 065A Refrigerant PipingRecommended line sizes OD copper inches Equivalent Length Hot Gas Line Liquid LineEquivalent lengths feet for various pipe fittings Fan Speed Control SystemsMaterials Supplied Condenser refrigerant per serial tagDehydration/Leak Test Single Circuit Shown Charging Refrigerant control settings psi kPaLee-Temp/Flood Back Head Pressure Control Systems PipingMaterials Supplied Low Pressure Cut Out High Pressure Cut Out 360 Single Circuit Shown Condenser Water-cooled general arrangement Water Regulating Valve Water Regulating Valve AdjustmentTesting Valve Function Water Regulating Valve Manual FlushingDrycooler Installation Drycooler LocationPump and Drycooler Expansion Tanks, Fluid Relief Valves and Other Devices Room dew point temperaturesGlycol Piping Dry Bulb Wet Bulb Relative Dew Point HumidityFilling Instructions Indoor unit glycol volume approximate gallons liters maxVolume in standard Type L copper piping Preparing the System for FillingGlycol Solutions Ethylene glycol concentrations@ 50F 10C Filling the System See Note 30-1/4 For expansion tank dimensions, see on43-9/16 110 5mm 483mm 43-3/16 1097mmGlycol pump data Mounting hole dimensional dataDrycooler data Pump Pump Suction Pump Discharge ConnectionGlycol general arrangement Glycool general arrangement Glycol Regulating Valve Adjustment Glycol Regulating ValveChilled Water Models Air-Cooled Condensing Units Water/Glycol-Cooled Condensing UnitsRefrigerant Loop Unit refrigerant charge Recommended refrigerant lines R22 or R407C sizes OD copperLine coupling sizes Evaporator Evaporator Condensing UnitQuick Connect Fittings Unit Dimensions See Table Outdoor Air-Cooled Condensing UnitsPFH067A-L Outdoor air-cooled condensing unit-top air discharge models See TablePiping and electrical connections top air discharge 36-1/4 38-1/2152 Electrical field connections, prop fan condensing module SL-11081 PG 8ACentrifugal Air-Cooled Condensing Units Installing the Indoor Condensing UnitModel Net Weight 60 Hz 50 Hz Lb kg MC65A MC64A Indoor centrifugal condensing unitDucting Airflow CFM CMHCentrifugal air-cooled condensing unit dimensional data AIR Cooled Water Cooled Piping Considerations Regulating Valve Adjustment and TestingWater and Glycol-Cooled Condensing Units Condenser Water RequirementsWater/glycol-cooled condensing unit dimensions WATER/GLYCOL Temperature Gauge Pressure Psig KPa R407C RefrigerantTemperature Pressure Gauge Psig KPa Calculating SubcoolingExample Ti n Ne tIti That

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.