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3. Liebert Ds Precision Cooling System
4. Liebert Hpm Precision Cooling User Manual Software

Page 125: Figure 85 correct orientation of float switch, Humidifier, Correct orientation of float switch

3 humidifier, 1 infrared humidifier, 2 cleaning humidifier pan and float switch – Liebert Precision Cooling System DS User Manual Page 125: Figure 85 correct orientation of float switch, Humidifier, Correct orientation of float switch. Liebert HCR-PD- 273534 - 1 - 1 Features and Benefits The Liebert HCR heat exchangers are our new range of remote air-cooled condensers especially designed to be coupled with the Liebert CRV (A type) air conditioning units power supplied at 50Hz (CE market), within a standard range of external air temperature from-20°C to + 46°C.

Liebert HPM - PD - 273153 - Liebert HPM 6-205 kW Indoor Room Cooling Units C Version (single chilled water circuit) R Version (redundant - double chilled water circuit) Precision Cooling for Business-Critical Continuity PRODUCT DOCUMENTATION.

Maintenance

115

12.3 Humidifier

12.3.1 Infrared Humidifier

During normal humidifier operation, deposits of mineral solids will collect in humidifier pan and on

the float switch. These must be cleaned periodically to ensure proper operation. Frequency of cleaning

must be locally established since it is dependant on humidifier usage and local water quality. A spare

pan is recommended to reduce maintenance time at unit. The Liebert autoflush system can greatly

increase the time between cleanings, but does not eliminate the need for periodic checks and mainte-

nance (see iCOM user manual SL-18835 for autoflush setup). To help reduce excessive scaling in loca-

tions with difficult water quality, the use of Vapure is recommended (contact your local Emerson

representative).

12.3.2 Cleaning Humidifier Pan and Float Switch

Before turning off unit:
1. With unit operating, remove call for humidification at iCOM control.
2. Let blower operate 5 minutes to allow humidifier and water to cool.
3. If unit has a condensate pump, turn unit OFF at iCOM control.
4. Pull out humidifier standpipe in pan.
5. Inspect O-ring (replace if necessary).
6. Let pan drain and condensate pump operate (if applicable).
7. Disconnect power from unit.
8. Disconnect drain coupling from bottom of pan.
9. Remove thermostat from bottom of pan and retaining screws from sides of pan.
10. Slide pan out.
11. Loosen scale on side and bottom of pan with a stiff nylon brush or plastic scraper.
12. Flush with water
13. Carefully clean scale on float switch (make sure to reinstall correctly (seeFigure 85).
14. Reinstall pan, thermostat, standpipe, drain coupling and screws into humidifier.
15. Operate humidifier and check for leaks.

Figure 85 Correct orientation of float switch

Correct Switch Orientation

Incorrect Switch Orientation

DPN000996
Rev. 0

Precision Cooling

For Business-Critical Continuity™

Liebert®Variable Speed Upgrade Kits

Save Money Through Energy Efficient Operation

Get more efficient operation from your existing Chilled Water CRAC systems and quick payback through lower electricity costs and utility rebates.

The Variable Speed Drive (VSD/VFD) Upgrade is easily installed on your Liebert Deluxe System/3 Chilled Water systems, providing immediate results with lower electrical bills.

Typically, CRAC fans run at a constant speed and deliver a constant volume of air flow. Adding a Variable Speed Drive to the fan motor allows fan speed and power draw to be reduced as load decreases. A 20 percent reduction in fan speed provides almost 50 percent savings in fan power consumption.

VSD Features

Lowest Total Cost of

Ownership

Average payback on electricity costs is less than two years

Utility rebates available in some regions, providing even faster payback

Flexibility

Easy field installation by a factory trained technician

Higher Availability

Variable fan speed increases the life of the fan and motor

Estimate your savings

The example below shows the cost to operate a floormount chilled water cooling unit at $0.10/kWh. Average energy savings offer full payback on VSD/VFD upgrades in two years or less.

$5,100/Year Savings

$3,400/Year $2,500/Year Savings

Savings

$1,700/Year Savings

Your Emerson Network Power/Liebert representative or local electric company can give you information about utility rebates for deploying energy efficiency initiatives. Rebates can lower the payback period to less than a year in many applications.

Real world payback

A customer in Texas

has completed a VSD/VFD upgrade, and utility savings based on site kW measurement readings are:

$3,400 energy cost savings per unit per year (34,427 kWh/unit/year)

$1,100 first year utility incentive per unit

$3,400 + $1,100 = $4,500 first year savings per unit.

A factory-trained service professional will assess your existing Liebert Deluxe

System/3 for VSD/VFD

compatibility.

Liebert Corporation

1050 Dearborn Drive

P.O. Box 29186

Columbus, Ohio 43229

800 877 9222 Phone (U.S. &

Canada Only)

614 888 0246 Phone (Outside U.S.)

614 841 6022 FAX

liebert.com

24 x 7 Tech Support

800 222 5877 Phone

Precision Cooling System

614 841 6755 (outside U.S.)

While every precaution has been taken to ensure accuracy

and completeness in this literature, Liebert Corporation assumes no responsibility, and disclaims all liability for

damages resulting from use of this information or for any errors or omissions.

© 2009 Liebert Corporation. All rights reserved throughout the world. Specifications subject to change without notice.

All names referred to are trademarks or registered trademarks of their respective owners.

® Liebert and the Liebert logo are registered trademarks of the Liebert Corporation.

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