Liebert CR035 User Manual

Liebert.CRV Series Air Conditioner
User Manual
Version V1.4
Revision date May 28, 2012
BOM 31011886
Emerson Network Power provides customers with technical support. Users may contact
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Copyright © 2010 by Emerson Network Power Co., Ltd.
All rights reserved. The contents in this document are subject to change without notice.
Emerson Network Power Co., Ltd.
Address: No.1 Kefa Rd., Science & Industry Park, Nanshan District 518057, Shenzhen
China
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Liebert CR035 Specifications

General

Brand	Liebert
Model	CR035
Category	Air Conditioner
Language	English

Summary

Important Safety Instructions

Warning - Risk of top-heavy unit falling over

Instructions for safe movement and handling to prevent serious injury or equipment damage.

Caution - Risk of sharp edges, splinters and exposed fasteners

Safety precautions for personnel handling the unit, emphasizing proper protective gear.

Caution - Risk of overhead interference

Warning about potential unit and structure damage due to overhead obstructions during movement.

Caution - Risk of frozen fluids

Warning - Risk of electric shock

Critical safety advice regarding electrical hazards and required disconnects before maintenance.

Warning - Risk of explosive discharge from high-pressure refrigerant

Safety alert about high-pressure refrigerant hazards and pressure relief procedures.

Warning - Risk of refrigerant system rupture or explosion from overpressurization

Safety measures for preventing overpressurization in the refrigerant system.

Digit Nomenclature

Chapter 1 Preliminary Operations

1.2 Handling

1.3 Operating Limits

Specifies the operational ranges for temperature, humidity, and power supply.

Chapter 2 Unit Positioning

1. Placement in the row of racks

Guidance on optimal placement of units within rack rows for best performance.

2. Number of racks / length of the row

3. Placement in the room

Guidance on room placement, specifically cold aisle and hot aisle width.

4. Solutions with redundancy

5. Example of applications with CoolFlex

Recommendations for using CoolFlex with Liebert.CRV for high density IT loads.

6. Example of applications with Liebert XD

Integration examples of Liebert.CRV with Liebert XD systems for high density and scalability.

Chapter 3 Unpacking And Installation

3.1 Reference Guide For Receiving, Unpacking, And Preparing For Installation

Comprehensive guide for receiving, unpacking, and preparing the unit for installation.

3.2 Recommended Unit Handling Equipment

3.3 Handling The Unit While Packaged

3.4 Unpacking The Unit

Step-by-step procedure for safely unpacking the Liebert.CRV unit.

3.5 Installation

Steps for installing the unit, including opening panels and checking serial numbers.

Chapter 4 Refrigeration Connections

4.1 Refrigeration Pipeline Connections For Air-Cooled (A) Units

Details on connecting refrigeration pipelines for air-cooled units.

4.1.1 General Layout

4.1.2 Pipe Diameter And Thickness

4.1.3 Installing Pipelines

Detailed steps for installing refrigeration pipelines by a qualified technician.

4.2 Vacuum Creation And Refrigerant Charge

Procedure for vacuum creation and charging refrigerant into the system.

4.2.1 R410A Precharge For Air-Cooled (A) Units

Specific steps for pre-charging R410A refrigerant into air-cooled units.

4.2.2 Refrigerant Charge For Air-Cooled (A) Units

Procedure for charging refrigerant into air-cooled units for normal operation.

Chapter 5 Water Connections

5.1 General Warning

Warning about adding glycol to the circuit for outdoor tubing.

5.2 Water Connections – Supply Humidifier And Drain Water (All Units)

Details on water connections for humidifiers and condensate drain for all unit types.

5.3 Chilled Water Connections For Water/Glycol-Cooled (W) Units

Instructions for connecting chilled water to water/glycol-cooled units.

5.3.1 Notes For Open Circuit Applications

5.3.2 Notes For Closed Circuit Applications

5.4 Chilled Water Connections For Chilled Water (C) Units

Instructions for connecting chilled water to chilled water units.

Chapter 6 Electrical Connections

6.1 Cable Entry Ports, Routing Cables And Connection Procedures

6.2 Protective Features Of EC Fans

6.3 Protective Features Of Electrical Heaters

6.4 Temperature Probes Placed On Racks

Chapter 7 Start-Up

7.1 First Start-Up (Or After Long Standstill)

Detailed steps for initial startup, including preheating and checks.

7.3 Checking The Refrigeration Piping Pressure Drops

Chapter 9 Calibrations & Regulation (At Start-Up)

9.1 Setting Thermostatic Expansion Valve

Procedure for adjusting the thermostatic expansion valve for proper superheat.

Chapter 10 Maintenance & Spare Parts

10.1 Safety Instructions

Essential safety guidelines for performing maintenance operations.

10.3 Maintenance Schedule

10.4 Air Filter Check Or Substitution

10.5 Condensate Drain And Condensate Pump Systems

10.6 Air-Cooled Condenser And Drycoolers

10.7 Electrical Heaters

10.8 Refrigeration Circuit

10.8.1 Refrigerant Charge Of The Water-Cooled Units

Steps for charging refrigerant into water-cooled units.

10.8.2 Oil Charge R410A

10.10 Regulation (EC) No. 842/2006 (F-Gas)

10.11 Unit Diagnostic

Table of common problems, their possible causes, and corrective actions.

Appendix 4 Refrigerant, Hydraulic And Electrical Connections

Electrical field connecions descriptions (50Hz)