Liebert ITR installation manual System Descriptions

Page 7

Introduction

1.0INTRODUCTION

1.1System Descriptions

Liebert Challenger ITRenvironmental control systems are available in three main system configu- rations:

self contained system with a scroll compressor in the room unit

self contained chilled water system

split system with an evaporator section and a remote condensing unit

All three types are available in horizontal flow configurations. Each model requires three-phase power. Units are available in 208, 230, 460, or 575 V, 60 Hz; and 200, 230 or 380/415 V, 50 Hz.

The following features are included as standard in all room units regardless of the type of system: V-frame coil, infrared humidifier, finned tubular stainless steel electric reheat, 2" filter, individual high voltage fused protection, and fan assembly.

Each configuration can operate with either Advanced Microprocessor Controls (A), or Advanced Microprocessor Controls with Graphics (G). A brief description of each, including operational differ- ences, is listed below. Check model numbers to see what is supplied with your unit.

1.1.1Self Contained Systems Air-Cooled Models

Complete refrigeration system including hot gas bypass and crankcase heater with standard con- denser and fan speed control for 95°F (35°C) ambient at sea level.

Water-Cooled Models

Compete refrigeration system including hot gas bypass with water/glycol-cooled condenser and two- way water regulating valve with bypass.

Glycol-Cooled Models

The water-cooled model as described above plus pump package and 95°F (35°C) design ambient dry- cooler.

GLYCOOL Models

Complete refrigeration system including hot gas bypass with glycol condenser and three-way water reg- ulating valve plus an integrally piped Econ-O-Coil with three-way modulating control valve.

1.1.2Chilled Water Models

Chilled Water models include chilled water piping, three-way modulating valve and actuator assembly.

1.1.3Split Systems

Each Air-Cooled split system consists of an evaporator section and one of the following condensing units.

Prop Fan

Includes scroll compressor, condenser coil, prop fan, high pressure switch, and Lee-Temp head pres- sure control. Unit is designed for outdoor location.

Centrifugal Fan

Includes scroll compressor, condenser coil, centrifugal blower assembly, high pressure switch, head pressure control valve, Lee-Temp receiver and liquid line solenoid valve. Unit must be mounted indoors. Duct flanges are optional.

Water/Glycol Condensing Units

Each water-cooled split system consists of an evaporator section and a water/glycol condensing unit, which includes scroll compressor, coaxial condenser, water regulating valve, and high pressure switch. Design pressure is 150 psi (1034 kPa) as standard and 350 psi (2413 kPa) as optional.

Each glycol-cooled split system consists of an evaporator section, a water/glycol condensing unit (as described above), a pump package and a 95°F (35°C) design ambient drycooler.

1

Image 7
Contents Liebert Challenger ITR Page Table of Contents Split System Models Chilled Water ModelsR407C Refrigerant Figures Tables System Descriptions Location Considerations Remote Sensor Installation LocationRoom Preparation Equipment InspectionDomestic Export Model Lb kg 50Hz Models 60Hz Models Unit shipping weightsHandling With Skid Removal of SkidUnit Weight Cabinet dimensionsSL-11897 Drain Line Piping ConsiderationsPiping 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 ConnectionsBalancing the Air Distribution Plenum InstallationDucted Applications Checklist for Completed Installation Lee-Temp/Flood Back Head Pressure Control Condensers Condenser LocationLine Voltage Low VoltageAir-cooled condenser statistics Equivalent Length Hot Gas Line Liquid Line Refrigerant PipingRecommended line sizes OD copper inches 23 & 33 kW 067A 065ACondenser refrigerant per serial tag Fan Speed Control SystemsMaterials Supplied Equivalent lengths feet for various pipe fittingsDehydration/Leak Test Single Circuit Shown Piping Refrigerant control settings psi kPaLee-Temp/Flood Back Head Pressure Control Systems ChargingMaterials Supplied Low Pressure Cut Out High Pressure Cut Out 360 Single Circuit Shown Condenser Water-cooled general arrangement Water Regulating Valve Manual Flushing Water Regulating Valve AdjustmentTesting Valve Function Water Regulating ValveDrycooler Location Drycooler InstallationPump and Drycooler Dry Bulb Wet Bulb Relative Dew Point Humidity Room dew point temperaturesGlycol Piping Expansion Tanks, Fluid Relief Valves and Other DevicesPreparing the System for Filling Indoor unit glycol volume approximate gallons liters maxVolume in standard Type L copper piping Filling InstructionsEthylene glycol concentrations Glycol Solutions@ 50F 10C Filling the System 483mm 43-3/16 1097mm For expansion tank dimensions, see on43-9/16 110 5mm See Note 30-1/4Pump Pump Suction Pump Discharge Connection Mounting hole dimensional dataDrycooler data Glycol pump dataGlycol general arrangement Glycool general arrangement Glycol Regulating Valve Glycol Regulating Valve AdjustmentChilled Water Models Water/Glycol-Cooled Condensing Units Air-Cooled Condensing UnitsRefrigerant Loop Recommended refrigerant lines R22 or R407C sizes OD copper Unit refrigerant chargeLine coupling sizes Evaporator Condensing Unit EvaporatorQuick Connect Fittings Outdoor Air-Cooled Condensing Units Unit Dimensions See TablePFH067A-L See Table Outdoor air-cooled condensing unit-top air discharge models36-1/4 38-1/2 Piping and electrical connections top air discharge152 SL-11081 PG 8A Electrical field connections, prop fan condensing moduleIndoor centrifugal condensing unit Installing the Indoor Condensing UnitModel Net Weight 60 Hz 50 Hz Lb kg MC65A MC64A Centrifugal Air-Cooled Condensing UnitsAirflow CFM CMH DuctingCentrifugal air-cooled condensing unit dimensional data AIR Cooled Water Cooled Condenser Water Requirements Regulating Valve Adjustment and TestingWater and Glycol-Cooled Condensing Units Piping ConsiderationsWater/glycol-cooled condensing unit dimensions WATER/GLYCOL R407C Refrigerant Temperature Gauge Pressure Psig KPaCalculating Subcooling Temperature Pressure Gauge Psig KPaExample That Ne tIti Ti n

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.