For Business-Critical Continuity
Liebert DS
User Manual 28-105kW, 8-30 Tons, Upflow and Downflow, 50/60Hz
Page
SAFETY INFORMATION
TABLE OF CONTENTS
1.0 LIEBERT DS COMPONENTS AND NOMENCLATURE 2.0 COOLING CONFIGURATIONS
3.0 PRE-INSTALLATION GUIDELINES
8.0 PIPING
12.0 MAINTENANCE
7.0 ELECTRICAL CONNECTIONS
13.0 HVAC MAINTENANCE CHECKLIST
FIGURES
compressor models
all compressor models
TABLES
Table 43 Component weights-upflow, air-cooled, 105kW 30 ton, scroll/digital scroll compressor models
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
Risk of leaking water. Can cause equipment and building damage
Risk of high-speed moving parts. Can cause injury or death
Risk of contact with hot surfaces. Can cause injury
Figure 1 Downflow model component locations
1.0 LIEBERT DS COMPONENTS AND NOMENCLATURE
Figure 2 Upflow model component locations
Air Distribution
Configuration
5 A U A
Liebert DS Components and Nomenclature
Glycol-Cooled
2.0 COOLING CONFIGURATIONS
Cooling Configurations
Air-Cooled
3.2 Air Distribution-Downflow Units
3.0 PRE-INSTALLATION GUIDELINES
3.1 Room Preparation
3.3 Air Distribution-Upflow Units
Figure 5 Upflow ducting configurations
3.5 Operating Conditions
3.4 Connections and System Setup
Upflow Unit Weight, lb
4.0 LIEBERT DS DIMENSIONS AND WEIGHTS
Liebert DS Dimensions and Weights
Downflow Unit Weight, lb
Front View
Top View
Top View
Front View
Top View
2400
DPN000924 Rev
Air-Cooled
2350
Front View
Figure 10 Cabinet and floor planning dimensions-downflow, air-cooled, 53-77kW 15-22 ton, scroll compressor models
FRONT VIEW
TOP VIEW
Front View
Weights for downflow, air-Cooled, 105kW 30 ton, all compressor models
Top View
Front View
Figure 13 Cabinet and floor planning dimensions-downflow, water/glycol/GLYCOOL, 105kW 30 ton, all compressor models
Top View
Front View
Figure 14 Cabinet and floor planning dimensions-upflow, air-cooled 28-42kW 8-12 ton, semi-hermetic compressor models
Top View
Figure 15 Cabinet and floor planning dimensions-upflow, air-cooled 28-42kW 8-12 ton, scroll or digital scroll compressor models
FRONT VIEW
838mm
Top View
Front View
Front View
Figure 18 Cabinet and floor planning dimensions-upflow, air-cooled, 53-77kW 15-22 ton, scroll or digital scroll compressor models
Top View
Front View
TOP VIEW
Table 17 Weights-upflow, air-cooled, 105kW 30 ton, all
Liebert DS Dimensions and Weights
Dry Weight, Approximate, lb kg
Model
Liebert DS Dimensions and Weights
TOP VIEW
FRONT VIEW
Height, in. mm
Liebert DS Dimensions and Weights
Dimensions, in. mm
Model
Height, in. mm
Liebert DS Dimensions and Weights
Dimensions, in. mm
Model
D turning vane
Figure 24 Floor stand dimensions-downflow, 105kW 30 ton models
Liebert DS Dimensions and Weights
Height, in. mm
Top of Unit
Figure 25 Blower outlet and deck dimensions-upflow, 28-42kW 8-12 ton
Table 22 Dimensions for upflow, 28-42kW 8-12 ton
Blower Outlet Location - Top View
Blower outlet and deck dimensions-upflow, 53-77kW 15-22 ton
1-1/2 38mm
Figure 27 Blower outlet and deck dimensions-upflow 105kW 30ton
Table 24 Blower outlet and deck dimensions-upflow 105kW 30ton
DPN001196 Rev
Figure 28 Rear return filter box dimensions
Table 25 Rear return filter box dimensions
Side View - Unit
Figure 29 Upflow unit plenum dimensions
Table 26 Upflow unit plenum dimensions
Check One
5.0 EQUIPMENT INSPECTION AND HANDLING
SAFETY INFORMATION
5.1 Packaging Material
Jack
Forklift
Pallet
Spreader Bars and Slings
Figure 32 Remove the unit from the skid
5.2.1 Removing the Unit from the Skid With a Forklift
5.2.3 Removing Piano Jacks
5.2.2 Moving the Unit to the Installation Location with Piano Jacks
Figure 33 Moving the unit to its installation location
Lifting
5.2.4 Removing Liebert DS from Skid Using Rigging
Sling
Figure 35 Using rigging to lift Liebert DS off skid
Lifting
Lifting
DETAIL A
5.3 Semi-Hermetic Compressor Spring Isolation System
5.4 Placing the Unit on a Floor Stand
6.0 DISASSEMBLING THE LIEBERT DS FOR TRANSPORT
6.2 Disassembly-Downflow Units
6.1 Required Equipment
13. GLYCOOL/Dual-Cool-Optional Component
10. Reheat-Optional Component
11. Humidifier-Optional Component
12. Condensate Pump-Optional Component
Emerson does not recommend unsweating refrigerant connections
6.2.1 Remove the Compressor Assembly
6.2.2 Remove the Filter and Electric Box Assembly
Emerson recommends using piano jacks when moving this section
6.3.1 Reconnecting Piping, Charging and Replacing Panels
6.3 Reassembly-Downflow Units
6.4 Reassembly Checklist
60-3/16
Compressor Assembly
Filter & Electric Box Assembly
Blower & Coil Assembly
Filter & Electric Box Assembly
Figure 39 Component dimensions-downflow, water/glycol/GLYCOOL, 28-42kW 8-12 ton, all compressor models
59-7/16 1509mm
940mm
1509mm
Figure 42 Component dimensions-downflow water/glycol, GLYCOOL, 53-77kW 15-22 ton, all compressor models
Figure 43 Component dimensions-downflow, air-cooled, 105kW 30 ton, semi-hermetic compressor models
See disassembly and handling instructions in installation manual
Figure 45 Component dimensions-downflow, water/glycol/GLYCOOL, 105kW 30 ton, all compressor models
Emerson does not recommend unsweating refrigerant connections
6.5 Disassembly-Upflow Units
Emerson recommends using piano jacks when moving this section
6.5.1 Remove Compressor Assembly
6.5.2 Remove Blower and Electric Box Assembly
6.7 Reassembly Checklist
6.6 Reassembly-Upflow Unit
Figure 46 Component dimensions-upflow, air-cooled, 28-42kW 8-12 ton, semi-hermetic compressor models
Figure 47 Component dimensions-upflow, air-cooled, 28-42kW 8-12 ton, scroll/digital scroll compressor models
Figure 48 Component dimensions-upflow, water/glycol/GLYCOOL, 28-42kW 8-12 ton, all compressor models
108 2743mm Assembled Length
660mm
2083mm
Figure 50 Component dimensions-upflow, air-cooled, 53-77kw 15-22 ton, scroll/digital scroll compressor models
Figure 51 Component dimensions-upflow water/glycol/GLYCOOL 53-77kw 15-22 ton, all compressor models
Figure 52 Component dimensions-upflow, air-cooled, 105kW 30 ton, semi-hermetic compressor models
Figure 53 Component dimensions-upflow, air-cooled, 105kW 30 ton, scroll/digital scroll compressor models
31-1/4 794mm
Electrical Connections
7.0 ELECTRICAL CONNECTIONS
OVERLOAD PROTECTORS
DOWNFLOW LOW VOLT SECTION
Electrical Connections
A B C D
Standard Electrical Connections
12. Factory installed disconnect switch
13. Secondary disconnect switch and earth ground
7.1 Electrical Field Connection Descriptions
Optional Low Voltage Terminal Package Connections
Gravity Drain
8.1.1 Condensate Piping-Field-Installed
8.1 Fluid Connections
8.0 PIPING
DOWNFLOW DS UNIT
CORRECT
INCORRECT
INCORRECT DPN001556
General Guidelines
8.1.3 Requirements of Systems Using Water or Glycol
8.1.2 Humidifier Supply Water-Optional Infrared
Leak Checking of Unit and Field Piping
8.2 Refrigeration Piping
8.2.1 Piping Guidelines-Air-Cooled Units
11.7
Fan Speed Control Materials Supplied
8.3 Dehydration/Leak Test and Charging Procedures for R-407C and R-22
Fan Speed Control Leak Check and Evacuation Procedure
Fan Speed Control Piping
Fan Speed Charging
Table 49 Fan speed suction pressure transducer settings
Lee-Temp Controlled Materials Supplied
Lee-Temp Leak Check and Evacuation Procedure
Lee-Temp Piping
Sight Glass Levels
Table 50 Lee-Temp suction pressure transducer settings
Lee-Temp Charging
Lee-Temp Receiver Refrigerant Level
Liquid
9.0 PIPING SCHEMATICS
Valve Liquid Return
Lee-Temp
Liquid
Liquid Return
Lee-Temp
Fan Speed
Liebert DS Unit
Piping schematic-water/glycol, semi-hermetic compressor models
refer to 12.11.3 - Drycooler Settings
For systems with drycoolers
LIEBERT
Figure 60 Piping schematic-water/glycol with scroll compressor models
Piping Schematics
For systems with drycoolers refer to 12.11.3 - Drycooler Settings
LIEBERT
Figure 61 Piping schematic-GLYCOOL semi-hermetic compressor models
Piping Schematics
For systems with drycoolers refer to 12.11.3 - Drycooler Settings
LIEBERT
Figure 62 Piping schematic-GLYCOOL with scroll compressor models
Piping Schematics
For systems with drycoolers refer to 12.11.3 - Drycooler Settings
HEAT REJECTION
Piping Schematics
CUSTOMER HEAT REJECTION
LIEBERT
LIEBERT DS UNIT and associated piping
Piping Schematics
LIEBERT
HEAT REJECTION
DPN000805 Rev
Figure 65 Optional piping schematic for Econ-O-Coil
DPN000803
Front View
Section A-A
FRONT OF UNIT
Note Drawing not to scale
E1 E2
Description
Piping Schematics
Connection Size / Opening
Point
Description
Piping Schematics
Connection Size / Opening
Point
408mm
DPN000933
16-1/16
LV1 LV2 LV3
HUM E1 E2 Front of Unit
DPN001014 Rev
14-1/2
Description
Piping Schematics
Connection Size / Opening
Point
Point
Piping Schematics
FRONT SECTION VIEW
Connection Size / Opening
Front Section View
Piping Schematics
Left Side Section View
Top View of Unit
Left Front Panel Not Shown
Piping Schematics
TOP VIEW OF UNIT
FRONT SECTION VIEW OF UNIT
Point
Piping Schematics
Front Section View
Connection Size / Opening
Left Side Section View
Piping Schematics
2. Tolerance on all piping dimensions is ±1/2 13mm
Top View
FRONT SECTION VIEW OF UNIT
Piping Schematics
TOP VIEW OF UNIT
LEFT SIDE SECTION VIEW OF UNIT
Figure 81 Primary connection locations-upflow, water/glycol/GLYCOOL, 105kW 30 ton, all
10.3 Piping
10.0 CHECKLIST FOR COMPLETED INSTALLATION
10.1 Moving and Placing Equipment
10.2 Electrical
Page
11.2 Startup Checks Inspection With Panels Removed and Disconnect Off
Return Completed Startup Form to Your Local Emerson Sales Office
11.3 Commissioning Procedure With Panels On
12.1 Filters
12.0 MAINTENANCE
Do Not Use
12.1.1 Filter Replacement Procedure-Downflow Units
12.1.2 Filter Replacement Procedure-Upflow Units
12.2 Blower Drive System
12.2.2 Belt Removal
12.2.1 Upflow Motor Access
12.2.3 Belt Installation and Tensioning
Figure 83 Upflow motor access
Blower Motor
Blower Bearing Maintenance
Blower Bearing Replacement
Blower Bearing Inspection
12.3.1 Infrared Humidifier
Correct Switch Orientation Incorrect Switch Orientation
12.3.2 Cleaning Humidifier Pan and Float Switch
12.3 Humidifier
12.4.2 Condensate Pump
12.4 Condensate Drain and Condensate Pump Systems
12.3.3 Changing Humidifier Lamps
12.4.1 Condensate Drain
12.7.1 Compressor Oil
12.5 Air-Cooled Condenser and Drycoolers
12.6 Reheat-Electric Reheat Three-Stage and SCR
12.7 Compressor
12.8.1 Compressor Motor Burnout
12.8 Compressor Replacement
12.9 Facility Fluid and Piping Maintenance
12.8.3 Compressor Replacement Procedure
12.11 Water/Glycol Control Valves
12.10.1 Cleaning Instructions
Adjustment-Johnson Controls/Penn Johnson Valves
12.10 Paradenser-Water-Cooled Condenser
12.11.2Motor Ball Valve-Digital Scroll Compressors
Testing Function of Valve
Adjustment
Location
Table 60 Aquastat settings-eight-fan drycoolers
12.11.3Drycooler Settings
Table 58 Aquastat settings-two-fan through four-fan drycoolers
Table 59 Aquastat settings-six-fan drycoolers
Reheat
13.0 HVAC MAINTENANCE CHECKLIST
Filters
Blower Section
Compressor Section
Condensate Pump
Refrigeration Piping
Water-Cooled Condensers
Glycol Pump
Air-Cooled Condenser / Drycooler
Page
Of Mission-Critical Data And Applications
Ensuring The High Availability