Land Listing and Signal Descriptions

73 Datasheet

VID[7:0] Output

The VID (Voltage ID) signals are used to support automatic

selection of power supply voltages (V

). Refer to the Voltage

Regulator Design Guide for more information. The voltage supply

for these signals must be valid before the VR can supply V

to the

processor. Conversely, the VR output must be disabled until the

voltage supply for the VID signals becomes valid. The VID signals

are needed to support the processor voltage specification

variations. See Table 2 for definitions of these signals. The VR must

supply the voltage that is requested by the signals, or disable itself.

VID_SELECT Output

This land is tied high on the processor package and is used by the

VR to choose the proper VID table. Refer to the Voltage Regulator

Design Guide for more information.

VRDSEL Input

This input should be left as a no connect in order for the processor

to boot. The processor will not boot on legacy platforms where this

land is connected to V

VSS Input

VSS are the ground pins for the processor and should be connected

to the system ground plane.

VSSA Input

VSSA provides isolated ground for internal PLLs on previous

generation processors. It may be left as a No-Connect on boards

supporting the processor.

VSS_SENSE Output

VSS_SENSE is an isolated low impedance connection to processor

core V

. It can be used to sense or measure ground near the

silicon with little noise.

VSS_MB_

REGULATION

Output

This land is provided as a voltage regulator feedback sense point

for V

. It is connected internally in the processor package to the

sense point land V27 as described in the Voltage Regulator Design

Guide.

VTT Miscellaneous voltage supply.

VTT_OUT_LEFT

VTT_OUT_RIGHT

Output

The VTT_OUT_LEFT and VTT_OUT_RIGHT signals are included to

provide a voltage supply for some signals that require termination

to V

on the motherboard.

VTT_SEL Output

The VTT_SEL signal is used to select the correct V

voltage level

for the processor. This land is connected internally in the package

to V

Table 24. Signal Description (Sheet 10 of 10)

Name Type Description

1 2 ... 68 69 70 71 72 73 74 75 76 77 78 ... 99 100

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Liebert Precision Cooling System DS Instrukcja Użytkownika (136 strony)

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User Manual

TABLE OF CONTENTS

SAVE THESE INSTRUCTIONS

2.0 COOLING CONFIGURATIONS

3.1 Room Preparation

Pre-Installation Guidelines

3.5 Operating Conditions

35"

33"

Dry Weight - lb. (kg)

Approximate

DPN000924

TOP VIEW

FRONT VIEW

DPN001013

24"

Supply air

26"

Top of Unit

DPN001196

SAFETY INFORMATION

Spreader Bars and Slings

Piano Jacks

Forklift

5.2.3 Removing Piano Jacks

DETAIL A

6.1 Required Equipment

6.3 Reassembly—Downflow Units

6.4 Reassembly Checklist

60-3/16"

(1529mm)

59-7/16"

(1509mm)

37"

6.5 Disassembly—Upflow Units

6.6 Reassembly—Upflow Unit

6.7 Reassembly Checklist

31-1/4"

45-13/16"

(1163mm)

7.0 ELECTRICAL CONNECTIONS

Electrical Connections

8.0 PIPING

INCORRECT

INCORRECTINCORRECT

General Guidelines

8.2 Refrigeration Piping

Fan Speed Control Piping

Fan Speed Charging

Lee-Temp Piping

Lee-Temp Charging

9.0 PIPING SCHEMATICS

For systems with drycoolers

CUSTOMER

HEAT REJECTION

LIEBERT DS UNIT

(and associated piping)

Piping Schematics

100

FRONT OF UNIT

101

Front View

101

Section A-A

101

DPN000803

101

Front of Unit

102

DPN000804

102

DPN000900

103

DPN000928

104

DPN000929

105

DPN000933

106

DPN001014

107

DPN001015

108

15-3/16"

109

FRONT SECTION VIEW

110

DPN001119

110

15-7/8"

111

FRONT SECTION VIEW OF UNIT

112

(Left Front Panel Not Shown)

112

TOP VIEW OF UNIT

112

Top View

113

Left Side Section View

113

Front Section View

113

FRONT SECTION VIEW OF UNIT

115

Front Of Unit

116

DPN001258

116

10.2 Electrical

117

10.3 Piping

117

10.4 Other

117

WARNING

118

12.0 MAINTENANCE

121

12.2 Blower Drive System

122

12.2.1 Upflow Motor Access

123

12.2.2 Belt Removal

123

Maintenance

124

Correct Switch Orientation

125

Incorrect Switch Orientation

125

DPN000996

125

12.4.1 Condensate Drain

126

12.4.2 Condensate Pump

126

12.7 Compressor

127

12.8 Compressor Replacement

128

12.10.1 Cleaning Instructions

129

12.11.3Drycooler Settings

131

AINTENANCE CHECKLIST

132

HVAC Maintenance Checklist

133

Glycol Pump

134

SL-18825_REV07_05-08

136

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Liebert Precision Cooling System DS Instrukcja Użytkownika (136 strony)

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