Emerson Chilled Water Series, Liebert PEX P3110VC2MS1RZ00 User Manual
Next Generation Critical Cooling
for Room and Row
Liebert PEX
Effi ciency And Reliability For High Availability Cooling
Chilled Water Models
User Manual
Liebert.PEX Chilled Water Series Air Conditioner
User Manual
Version V1.1
Revision date May 6, 2010
BOM 31011830
Emerson Network Power provides customers with technical support. Users may contact the
nearest Emerson local sales office or service center.
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
Homepage: www.emersonnetworkpower.com.cn
E-mail: support@emersonnetwork.com.cn
Contents
Chapter 1 Overview ........................................................................................................................................................... 1
1.1 Model Description ............................................................................................................................................... 1
1.2 Main Components ............................................................................................................................................... 1
1.3 Remote Monitoring Software ............................................................................................................................. 2
1.4 Environmental Requirements ............................................................................................................................ 2
1.4.1 Operation Environment ........................................................................................................................... 2
1.4.2 Storage Environment .............................................................................................................................. 3
Chapter 2 Mechanical Installation ................................................................................................................................... 4
2.1 Installation Preparation ...................................................................................................................................... 4
2.1.1 Transportation And Movement ............................................................................................................... 4
2.1.2 Unpacking ................................................................................................................................................ 4
2.1.3 Inspection ................................................................................................................................................. 5
2.1.4 Installation Notes ..................................................................................................................................... 6
2.2 System Installation Arrangement ...................................................................................................................... 6
2.2.1 General Arrangement .............................................................................................................................. 6
2.2.2 Mechanical Parameters ........................................................................................................................... 7
2.3 Installing Chilled Water AC Unit ...................................................................................................................... 14
2.3.1 Installation Requirement ....................................................................................................................... 14
2.3.2 Installation Procedures ......................................................................................................................... 15
2.4 Piping ................................................................................................................................................................. 19
2.5 Removing Transport Fastener And Vibration Absorber ................................................................................ 21
2.6 Adjusting Water Level Regulator ..................................................................................................................... 24
2.7 Installation Inspection ...................................................................................................................................... 25
Chapter 3 Electric Installation ........................................................................................................................................ 26
3.1 Work Introduction And Installation Notes ...................................................................................................... 26
3.2 Wiring Of Chilled Water AC Unit ...................................................................................................................... 26
3.2.1 Locating Electrical Interfaces ............................................................................................................... 26
3.2.2 Connecting Power Cable Of Chilled Water AC Unit............................................................................ 27
3.2.3 Connecting Control Cables .................................................................................................................. 28
3.3 Installation Inspection ...................................................................................................................................... 29
Chapter 4 System Start-Up Commissioning ................................................................................................................. 30
4.1 Locating MCBs .................................................................................................................................................. 30
4.2 Start-Up Commissioning .................................................................................................................................. 32
4.2.1 Preparation Before Commissioning..................................................................................................... 32
4.2.2 Commissioning Procedures ................................................................................................................. 32
4.2.3 Inspection After Commissioning ......................................................................................................... 33
Chapter 5 iCOM Controller ............................................................................................................................................. 34
5.1 LCD .................................................................................................................................................................... 34
5.2 Button And Indicator Panel .............................................................................................................................. 34
5.3 Structure Chart Of Control Menu ..................................................................................................................... 36
5.4 Startup Interface ............................................................................................................................................... 36
5.5 Main Interface .................................................................................................................................................... 36
5.6 USER MENUS .................................................................................................................................................... 37
5.6.1 PASSWORD ........................................................................................................................................... 37
5.6.2 SETPOINTS ............................................................................................................................................ 37
5.6.3 EVENT LOG ............................................................................................................................................ 37
5.6.4 GRAPHICS .............................................................................................................................................. 39
5.6.5 SET ALARMS ......................................................................................................................................... 39
5.6.6 SENSOR DATA ...................................................................................................................................... 40
5.6.7 DISPLAY SETUP .................................................................................................................................... 41
5.6.8 TOTAL RUN HRS ................................................................................................................................... 42
5.6.9 SLEEP MODE ......................................................................................................................................... 43
5.6.10 SERVICE INFO ..................................................................................................................................... 43
5.6.11 ACTIVE ALARMS ................................................................................................................................. 43
5.7 SERVICE MENUS .............................................................................................................................................. 43
5.7.1 PASSWORD LEVEL ............................................................................................................................... 44
5.7.2 SETPOINTS ............................................................................................................................................ 44
5.7.3 STANDBY ............................................................................................................................................... 45
5.7.4 WELLNESS ............................................................................................................................................. 45
5.7.5 DIAGNOSTICS ........................................................................................................................................ 48
5.7.6 SET ALARMS ......................................................................................................................................... 50
5.7.7 CALIBRATION ........................................................................................................................................ 52
5.7.8 NETWORK SETUP ................................................................................................................................. 52
5.7.9 OPTIONS SETUP ................................................................................................................................... 53
5.7.10 SERVICE INFO ..................................................................................................................................... 54
5.8 ADVANCED MENUS .......................................................................................................................................... 54
5.8.1 PASSWORD LEVEL ............................................................................................................................... 54
5.8.2 FACTORY SETUP .................................................................................................................................. 55
5.9 MBV Settings ..................................................................................................................................................... 59
5.10 EVENT NAME AND DEFINITION .................................................................................................................... 60
Chapter 6 Application Of INTELLISLOT ........................................................................................................................ 64
6.1 Introduction Of Host Communication Card .................................................................................................... 64
6.2 Installing Host Communication Card .............................................................................................................. 65
6.3 Commissioning Host Communication Component ....................................................................................... 65
6.3.1 Setting HyperTerminal .......................................................................................................................... 66
6.3.2 Setting 485 Communication Card ........................................................................................................ 67
6.3.3 Setting TCP/IP Communication Card ................................................................................................... 68
6.3.4 Setting SNMP Parameters Of TCP/IP Communication Card .............................................................. 70
6.4 Host Communication Networking Diagram .................................................................................................... 73
Chapter 7 System Operation And Maintenance ........................................................................................................... 74
7.1 System Diagnosis Test ..................................................................................................................................... 74
7.1.1 Self-diagnosis Function ........................................................................................................................ 74
7.1.2 Electric Control Part .............................................................................................................................. 74
7.2 Filter ................................................................................................................................................................... 75
7.3 Fan Kit ................................................................................................................................................................ 76
7.3.1 Fan Bearing And Blades ....................................................................................................................... 76
7.3.2 Belt .......................................................................................................................................................... 76
7.3.3 Motor....................................................................................................................................................... 76
7.4 Infrared Humidifier ............................................................................................................................................ 76
7.5 Electrical Heater ................................................................................................................................................ 78
7.6 Water Flow Control Valve ................................................................................................................................. 79
Chapter 8 Failure Diagnosis And Troubleshooting ...................................................................................................... 80
Appendix 1 The Structure Chart Of Electric Control Box ............................................................................................ 83
Appendix 2 Circuit Diagram ........................................................................................................................................... 86
Appendix 3 The Structure Chart Of Micro-processing Controller Menu .................................................................... 87
Chapater 1 Overview 1
Liebert.PEX Chilled Water Series Air Conditioner User Manual
Chapter 1 Overview
The Liebert.PEX chilled water air conditioner (chilled water AC for short) is a medium-large sized precision
environment control system configured with electrical heater and humidifier, suitable for the environment
control of the equipment room or computer room. It uses the chilled water supplied by the cooling water units.
It aims to provide a sound operation environment for precision equipment, such as sensitive equipment,
industry processing equipment, communication equipment and computers.
This chapter introduces the model description, main components and environmental requirements of chilled
water AC.
1.1 Model Description
The model description of the chilled water AC is shown in Figure 1-1.
P31
10VC2MS1RZ0
0
12345
678
9
10 11 12 13 14 15
Global PEX Chilled Water Model Nomenclature
Product R ang e
P
PEX
No. Modules-Bays/Fans
1
2
3
One
Two
Three
Nominal kW
20, 30, 40 to 150
Air Path
F
G
U
V
D
Downflo w (Forward Curve)
Downflow (EC Backward Curve)
Upflow (Forward Curve)
Upflow (EC Backward Curve)
Upflow Ducted (Forward Curve)
Cooling Type
C
Chilled W ater
Cooling Control
2
3
2 way CWV, CW, zero compressors
3 way CWV, CW, zero compressors
Voltage
M
400/3/50
iCOM Display
S
L
Small Disp lay
Large Display
Reheat Type
1
2
0
None
1 Stage
2 Stage
Humidifier
0
S
R
None
Infrared
Steam Ge nerating
Fac tor y C o nf igura ti o n Number
Z
A-Z
A-Z
Aust ralia & Ne w Ze aland
Options
Options
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Figure 1-1 Model description
1.2 Main Components
The chilled water AC unit includes heat exchanger, infrared humidifier, fan, electrical heater, water flow
control valve and micro-processing controller.
Heat exchanger
Use finned-tube heat exchanger with high heat emission efficiency. The model-specific distributions can
ensure the even distribution of chilled water in each loop and greatly improve the efficiency of the heat
exchanger, as well as minimize the water resistance of heat exchanging coil.
2 Chapter 1 Overview
Liebert.PEX Chilled Water Series Air Conditioner User Manual
Infrared humidifier
Configure with infrared humidifier which is easy for teardown, cleaning and maintenance. It is adjustable to a
wide range of water qualities, with fast startup and high humidifying efficiency.
Fan
Use forward centrifugal fan with high efficiency and reliability, large airflow and long blowing distance. With
the belt transmission mechanism, it is easy for maintenance. The user can also select electronically
commutated (EC for short) fan with backward blades. EC fan is energy-saving and space-saving with high
efficiency and low noise. It is also subject to stepless speed regulation. For the structure of EC fan downflow
unit, the solution of air supply by putting fan unit under floor is considered, which can significantly improve
the efficiency of air supply.
Electrical heater
Use screw finned U type stainless steel electrical heating tube, with fast heating speed and evenly distributed
heat volume.
Water flow control valve
The water flow control valve can adjust the chilled water flow quantity according to the cooling requirement. It
is connected to the system pipes with live joints, easy for field installation and maintenance, thus reducing
the project installation cost.
Micro-processing controller
The micro-processing controller of the chilled water AC uses an LCD screen with blue backlight and 128 × 64
dots. The user interface operation is simple. The multi-level password protection can effectively prevent
illegal operation. It also features power failure auto-restoration and high / low voltage protection function. The
operation time of components is available through the menus. The expert-level fault diagnosis system can
display the current fault information automatically, facilitating the maintenance. It can store up to 400 records
of historical events. The panel of micro-processing controller is shown in Figure 1-2.
Figure 1-2 Micro-processing controller panel
1.3 Remote Monitoring Software
The chilled water AC can communicate with the host computer through a configured communication port to
receive the control of the host software.
1.4 Environmental Requirements
1.4.1 Operation Environment
See Table 1-1 for details.
Table 1-1 Operation environment requirement
Item Requirement
Operation range
Indoor temperature: 4°C ~ 40°C
Chilled water supply temperature: 5°C ~ 13°C
Altitude < 1000m. Above that, derating is required
Operation voltage range 400V (-10% ~ +10%), three-phase AC, 50Hz
Chapater 1 Overview 3
Liebert.PEX Chilled Water Series Air Conditioner User Manual
1.4.2 Storage Environment
See Table 1-2 for details.
Table 1-2 Storage environment requirement
Item Requirement
Storage environment Indoor, clean, no dust
Ambient humidity 5%RH ~ 85%RH (non-condensing)
Ambient temperature -20°C ~ +54°C
Storage time
Total transportation and storage time should not exceed 6 months. Otherwise, the performance
needs to be re-evaluated
4 Chapter 2 Mechanical Installation
Liebert.PEX Chilled Water Series Air Conditioner User Manual
Chapter 2 Mechanical Installation
This chapter introduces the mechanical installation of the chilled water AC, including the transportation and
movement, unpacking, inspection, installation notes and installation procedures.
2.1 Installation Preparation
2.1.1 Transportation And Movement
Railroad transportation and shipping are the recommended means of transportation. If truck transportation is
unavoidable, choose roads that are less bumpy in order to protect the equipment.
The chilled water AC is heavy (see Table 2-1 for the weight parameters). It is recommended to use a
mechanical handbarrow such as an electric forklift when unpacking and moving the equipment to the place
closest to the installation site. Insert the tines of the forklift below the pallet, as shown in Figure 2-1. Align the
tines with the center of gravity to prevent the unit from falling over.
Figure 2-1 Fork direction
Keep the obliquity within 75° ~ 105° during the movement, as shown in Figure 2-2. Extreme incline is not
allowed.
1
0
5
7
5
Figure 2-2 Moving obliquity
2.1.2 Unpacking
Move the equipment to the place closest to the final installation site and then unpack it.
Follow the procedures below to unpack the unit:
1. Removing the side boards and top cover
The chilled water AC uses international packaging. You can use a hammer or straight screwdriver to
straighten the hook, as shown in Figure 2-3.
Chapter 2 Mechanical Installation 5
Liebert.PEX Chilled Water Series Air Conditioner User Manual
Figure 2-3 Straightening the hook
At first, straighten all the hooks that fix side board I, and remove side board I. Then straighten all the hooks
that fix side board II, and remove side board II. At last remove top cover III, as shown in Figure 2-4.
Kg
1790 x 950 x 2020mm
1816 x 976 x 2175mm
I
I
III
II
II
Figure 2-4 Removing side boards and top cover
2. Removing the pallet
The chilled water AC is fixed onto the pallet with M10 × 70 screws, as shown in Figure 2-5. You can use an M10
open-end spanner, a ratchet spanner or a sleeve to remove the fixing screws.
底板固
定
Pallet fixing screw (M10 70)
×
Figure 2-5 Fixing screw position of pallet
2.1.3 Inspection
After receiving the product, you should check it against the packing list. If any parts are found missing,
distorted or damaged, please report to the carrier immediately. If any covert defects are found, please report
to the carrier and the local office of Emerson Network Power Co., Ltd.
6 Chapter 2 Mechanical Installation
Liebert.PEX Chilled Water Series Air Conditioner User Manual
2.1.4 Installation Notes
To realize the designed performance and maximum product life, correct installation is vital. This section
should be used in conjunction with local industry standards for mechanical and electrical installations. Note
the following items:
1. The chilled water AC is designed for integrated floor installation. It should be installed on the floor of the
equipment room or computer room.
2. Before the installation, make sure that the installation environment meets the requirements (see 1.4
Environmental Requirements) and the building should be transformed to accommodate the construction work
of piping, wiring and ventilation ducts.
3. Follow the design drawings strictly when installing the equipment, and reserve the space for maintenance.
The engineering dimensions drawings provided by the manufacturer can serve as a reference.
2.2 System Installation Arrangement
2.2.1 General Arrangement
The general arrangement of the chilled water AC is shown in Figure 2-6.
Chille d wate r i nlet
Chille d wate r o utlet
Blance valve or iso lation valve*
Water filler
Isolation
valve
Drain valve
Hose
interf ac e
Welding interface of chilled
water inlet and outlet
Water flow regulating valve
BPH E coil
Exhaust valve
Balancing valve or is olatio n valve*
Water filter
Figure 2-6 General arrangement diagram
Note
1. : Factory piping.
2.
: Field piping (by technicians).
3. *: Components are not supplied by Emerson but are recommended for proper circuit operation and maintenance.
4. After the project installation, exhaust the AC unit before filling water to ensure the efficiency of the heat exchanger.
5. In winter, the AC unit in northern area does not operate for a long term; you must empty the water in AC unit to protect the
heat exchanger from frost cracking.
Chapter 2 Mechanical Installation 7
Liebert.PEX Chilled Water Series Air Conditioner User Manual
2.2.2 Mechanical Parameters
Dimensions
The dimensions of the chilled water AC are shown in Figure 2-7, Figure 2-8, Figure 2-9 and Table 2-1.
8
7
4
8
5
3
1970
8
5
3
1970
8
7
4
3
8
1
6
6
4
7
0
85
3
1970
8
7
4
8
5
3
1970
8
7
4
Upflow unit (forward fan) Upflow unit (backward fan)
1970
8
7
4
8
5
3
8
5
3
1970
8
7
4
8
7
4
1970
8
5
3
280
320
8
5
3
1970
8
7
4
Downflow unit (forward fan) Downflow unit (backward fan)
Figure 2-7 One-bay series (unit: mm)
8 Chapter 2 Mechanical Installation
Liebert.PEX Chilled Water Series Air Conditioner User Manual
1
7
0
4
1970
8
7
4
1
7
0
4
1970
8
7
4
3
8
1
6
6
2
3
3
4
7
0
4
7
0
3
4
5
1970
8
7
4
1
70
4
1
7
0
4
1970
8
7
4
Upflow unit (forward fan) Upflow unit (backward fan)
1
7
0
4
1970
8
7
4
1
7
0
4
1970
8
7
4
1
7
0
4
1970
8
7
4
280
320
1
7
0
4
1970
8
7
4
Downflow unit (forward fan) Downflow unit (backward fan)
Figure 2-8 Two-bay series (unit: mm)
Chapter 2 Mechanical Installation 9
Liebert.PEX Chilled Water Series Air Conditioner User Manual
2
5
5
3
1970
8
7
4
2
5
5
3
1970
8
7
4
6
6
3
8
1
2
3
3
4
7
0
4
7
0
3
4
5
4
7
0
3
8
2
1970
2
55
3
8
7
4
2
5
5
3
1970
8
7
4
Upflow unit (forward fan) Upflow unit (backward fan)
2
5
5
3
8
7
4
1970
2
5
5
3
1970
8
7
4
8
7
4
1970
2
5
5
3
280
320
8
7
4
1970
2
5
5
3
Downflow unit (forward fan) Downflow unit (backward fan)
Figure 2-9 Three-bay series (unit: mm)
Table 2-1 Dimension
Model Dimensions (W × D × H) (mm) Net weight (kg)
P1020 853 × 874 × 1970 ≤ 315
P1030 853 × 874 × 1970 ≤ 315
P1040 853 × 874 × 1970 ≤ 338
P1050 853 × 874 × 1970 ≤ 343
P2050 1704 × 874 × 1970 ≤ 476
P2070 1704 × 874 × 1970 ≤ 476
P2090 1704 × 874 × 1970 ≤ 505
P2100 1704 × 874 × 1970 ≤ 530
P3110 2553 × 874 × 1970 ≤ 656
10 Chapter 2 Mechanical Installation
Liebert.PEX Chilled Water Series Air Conditioner User Manual
Model Dimensions (W × D × H) (mm) Net weight (kg)
P3140 2553 × 874 × 1970 ≤ 706
P3150 2553 × 874 × 1970 ≤ 715
Plenum dimensions
You can select the air supply plenum with grids for the upflow system. The appearance of the plenum is
shown in Figure 2-10, Figure 2-11 and Figure 2-12. The detailed dimensions are listed in Table 2-2.
C
B
A
Figure 2-10 One-bay plenum
C
B
A
Figure 2-11 Two-bay plenum
C
B
A
Figure 2-12 Three-bay plenum
Table 2-2 Dimensions of plenum (unit: mm)
Type
A B C
One-bay 867 853 400 (600, optional)
Two-bay 867 1704 400 (600, optional)
Three-bay 867 2553 400 (600, optional)
Chapter 2 Mechanical Installation 11
Liebert.PEX Chilled Water Series Air Conditioner User Manual
Note
If the height of the plenum selected for air conditioner unit exceeds 600mm, consult the factory for non-standard production.
Base cut-out location dimensions
The base cut-out position dimensions of the chilled water AC are shown in Figure 2-13, Figure 2-14 and Figure
2-15.
6070
45
50
5570
45
40 134.7
130.1
138.4
160
45
45
160
78.3
50
74.9
Condensed water drain hole
Chilled water drain hole
Chilled water inlet opening
Water inlet opening
for humidifier
Cable inlet/
outlet opening
4 bottom plate
fastening holes
One-bay series
74.9
130.155
70
40
146.4
50
78.3
45
120
45
45
120
50
6070
45
159.6
Condensed water drain hole
Chilled water drain hole
Chilled water inlet opening
Cable inlet/outlet opening
4 bottom plate fastening holes
Water inlet opening
for humidifier
Two-bay series
146.4
50
40
130.1
74.9
5570
45
159.6
78.3
70
4545
72.5
50
45
70 60
160
45
730
45
45
120
Condensed water drain hole
Chilled water drain hole
Chilled water inlet opening
Water inlet opening
for humidifier
Cable inlet/outlet opening
7 bottom plate fastening holes
Three-bay series
12 Chapter 2 Mechanical Installation
Liebert.PEX Chilled Water Series Air Conditioner User Manual
Figure 2-13 Base cut-out locations of the upflow series (unit: mm)
612
471
119
45
45
350
48
48.5
105
6590
72.5
45
88.5
45
72.5
130
50
29
56.8
Air supply outlet
Condensed water drain hole
Chilled water inlet opening
Chilled water drain hole
Water inlet opening for humidifier
Cable inlet/
outlet opening
4 bottom plate
fastening holes
One-bay series
1460
318471
29
45
350
48
48.5
1056590
70
471 96.8
120
45
50
45
88.5
130
45
70
Air supply outlet Air supply outlet
Condensed water drain hole
Chilled water inlet opening
Chilled water drain hole
Water inlet opening for humidifier
Cable inlet/outlet opening
4 bottom plate
fastening holes
Two-bay series
120
45
29
471 318 471 420
350
48
48.5105
65
90
70
88.5
45
471 56.8 119
45
72.5
45
130
4545
70
72.5
50
Air supply outlet
Condensed water drain hole
Chilled water inlet opening
Chilled water drain hole
Water inlet opening for humidifier
Cable inlet/outlet opening
6 bottom plate
fastening holes
Air supply outlet
Air supply outlet
Three-bay series
Figure 2-14 Base cut-out locations of the forward fan downflow series (unit: mm)
Chapter 2 Mechanical Installation 13
Liebert.PEX Chilled Water Series Air Conditioner User Manual
850
686
89
429
798
651058172
58
45 43 79
583
601
130
60
306
73
157
4 bottom plate
fastening holes
Air supply outlet
Condensed water drain hole
Chilled water inlet opening
Chilled water drain hole
Water inlet opening
for humidifier
Cable inlet/
outlet opening
One-bay series
120
1460
157
623
6070
59
122583200
1700
583
78
4445
429
789
651058470
58
89
601
4 bottom plate
fastening holes
Air supply outlet
Air supply outlet
Condensed water drain hole
Chilled water inlet opening
Chilled water drain hole
Water inlet opening
for humidifier
Cable inlet/
outlet opening
Two-bay series
6 bottom plate
fastening holes
Condensed
water drain hole
Air supply outlet Air supply outlet
Chilled water inlet opening
Chilled water drain hole
Water inlet opening for
humidifier
Cable inlet/outlet opening
120
2550
2385
89
429
798
58
6510584
70
157
601
4544
1566
90
70
73
Air supply outlet
130
60
306 73
Three-bay series
Figure 2-15 Base cut-out locations of the backward fan downflow series (unit: mm)
14 Chapter 2 Mechanical Installation
Liebert.PEX Chilled Water Series Air Conditioner User Manual
Side panel cut-out locations
If piping and wiring from the base are difficult, connection from side panel can be selected. The locations and
dimensions of knock-out holes are shown in Figure 2-16. You can select the in and out holes according to the
factual needs, but must confirm that any two cables of pipe, power cable and signal cable cannot use the
same hole.
2-Ф 80 knock-out holt
3-Ф 35 knoc k-o ut holt
79.3
95.7 70
110.8
80
Φ
Φ
knock-o ut hole
knock-o ut hole
Upflow series
108.5 174.7
90
90.2
253.5
147.5
91.4
107
105.5
2-Ф 80 knock-out holtΦ
3-Ф 35 knoc k-ou t holt
Φ
knock-o ut hole
knock-out hole
Downflow series
Figure 2-16 Knock-out holes of side panel (unit: mm)
2.3 Installing Chilled Water AC Unit
2.3.1 Installation Requirement
Equipment room requirement
The requirements of equipment room are as follows:
1. Damp proof and heat preservation must be done to make sure that the system can operate normally.
2. The equipment room should have good heat insulation and sealed damp proof layer. The damp proof layer
of the ceiling and walls must use polyethylene film, and the coating of the concrete wall and the floor must be
damp proof.
3. Prevent the outdoor air from entering the equipment room, because the outdoor air that enters the
equipment room may increase the load of heating, cooling, humidifying and dehumidification of the system. It
is recommended that the inhalation of outdoor air be kept below 5% of the total indoor airflow.
4. All the doors and windows should be closed and the seams should be as narrow as possible.
Installation space requirement
Note
The chilled water AC will generate condensed water, and water leakage may damage the precision equipment nearby. So do not
install the system in the vicinity of any precision equipment, and the installation site must provide drain pipes.
1. To ensure normal operation, the installation space for the indoor unit shall be capacious enough.
Chapter 2 Mechanical Installation 15
Liebert.PEX Chilled Water Series Air Conditioner User Manual
2. Too small space for the indoor unit will baffle the airflow, shorten the cooling cycle; the air supply and air
exhaust may mix, and the decibel may rise.
3. Do not place the indoor unit in a concave or at the end of a strip area.
4. Do not huddle multiple indoor units, lest there should be mixed airflow, unbalanced load and competitive
operation.
5. For the convenience of daily maintenance, do not install other equipment (such as smoke detector) above
the cabinet.
6. Backward fan downflow unit: because the fan needs to sink during the operation, so the floor must be
higher than 400mm.
Figure 2-17 shows the installation place of the indoor unit.
Good place
Unit
Note:
The reserved maintenance space during the installation
600600
600
Bad place
Unit
Figure 2-17 Installation place of indoor unit (unit: mm)
Maintenance space requirement
Leave more than 600mm of maintenance space in the front and on both sides of the chilled water AC unit, as
shown in Figure 2-17.
2.3.2 Installation Procedures
The installation procedures of indoor unit are as follows:
1. Make the mounting base according to the dimensions in Figure 2-18, Figure 2-19 and Figure 2-20 and the
requirements in Table 2-3. You can make it yourself or contact Emerson Network Power Co., Ltd. for
non-standard production.
1
6
1
.
5
5
3
0
1
6
1
.
5
6
7
6
8
0
.
5
8
2
0
4
6
.
5
7
6
0
8
5
3
H
4
6
.
5
F ront side of cabinet
R ubbe r c ushion
(lateral)
Installa tion hole
for expansion bolt
R e ar side of ca bine t
S teel plate
R ubbe r c ushion ( bottom)
Angle steel
R ubbe r c ushion ( top)
4-Ф 14 cabinet installation hole
Φ
Figure 2-18 Mounting base of one-bay series (unit: mm)
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Liebert.PEX Chilled Water Series Air Conditioner User Manual
1
7
0
3
7
3
0
1
2
1
.
5
6
7
8
2
0
6
8
3
4
6
.
5
1
6
1
0
1
7
0
3
H
4
6
.
5
F ront side of cabinet
Installation hole
for expansion bolt
Rubber cushion (lateral)
R e ar side of ca bine t
S teel plate
R ubbe r c ushion ( bottom)
Angle steel
R ubbe r c ushion ( top)
4-Ф 14 cabinet installation hole
Φ
Upflow
7
3
0
1
7
0
3
1
2
1
.
5
4
6
.
5
6
7
8
2
0
5
9
3
1
6
1
0
1
7
0
3
4
6
.
5
H
F ront side of cabinet
R e a r side of ca binet
Ins talla tion hole
for expansion bolt
Rubber cushion (lateral)
S teel plate
R ubbe r c us hion (bottom)
Angle steel
R ubbe r c us hion (top)
4-Ф 14 cabinet installation hole
Φ
Downflow
Figure 2-19 Mounting base of two-bay series (unit: mm)
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Liebert.PEX Chilled Water Series Air Conditioner User Manual
4
6
.
5
8
2
0
1
6
1
0
1
6
1
.
5
6
7
5
3
0
7
3
0
6
8
3
1
2
1
.
5
6
7
6
8
0
.
5
8
2
0
7
6
0
2
5
5
3
H
4
6
.
5
F ront side of cabinet
R e ar side of ca bine t
Installa tion hole for expansion bolt
Rubber cushion (lateral)
S teel plate
R ubbe r cushion ( bottom)
Angle steel
R ubbe r cushion ( top)
8-Ф 14 cabinet installation hole
Φ
Upflow
6
7
7
3
0
1
2
1
.
5
6
8
0
.
5
1
6
1
.
5
6
7
8
2
0
5
3
0
4
6
.
5
7
6
0
1
6
1
0
2
5
5
3
5
9
3
8
2
0
4
6
.
5
H
R ubbe r c ushion ( top)
F ront side of cabinet
8-Ф 14 cabinet installation hole
R e ar side of ca bine t
Installa tion hole for expansion bolt
Rubber cushion (lateral)
S teel plate
R ubbe r cushion ( bottom)
Angle steel
Φ
Downflow
Figure 2-20 Mounting base of three-bay series (unit: mm)
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Liebert.PEX Chilled Water Series Air Conditioner User Manual
Table 2-3 Specifications of indoor unit mounting base
Item Specification Remark
Steel plate 100mm × 100mm × (5 ~ 6.5)mm -
Angle steel 40mm × 40mm × 3mm -
Rubber
cushion
Top Thickness: 3mm ~ 5mm -
Lateral Thickness: 2mm ~ 3mm -
Bottom Thickness: 10mm ~ 12mm -
Installation hole for
expansion bolt
-
Install the bolts according to your
requirements
H
One-bay
H = 200mm (upflow unit)
H = 300mm (forward fan downflow unit,
according to the floor height)
H ≥ 400mm (backward fan downflow
unit)
1. The forward downflow unit needs guide
plate.
2. Size H here is for reference only, and it
shall be determined according to the actual
needs. Backward fan downflow unit: because
the fan needs to sink during the operation,
size H must be larger than 400mm
Two-bay
Three-bay
Note:
The external side boards of the unit cannot bear weight. Take this into consideration while selecting angle steels and
fixing holes
2. Lay a layer of rubber cushion on the top, lateral of mounting base and on the bottom of the steel plate
respectively. See Figure 2-18, Figure 2-19 and Figure 2-20 for their positions and see Table 2-3 for the
thickness.
3. Determine the installation position. Fix the mounting base onto the mounting base according to the site
conditions and your requirement.
4. Fix the AC unit onto the mounting base with nuts, spring washers, flat washers and bolts.
5. Backward fan downflow unit: the fan must sink under floor, the detailed operation procedures are as
follows:
a. Before placing the unit to the actual installation location, open the rear board and remove the backward fan
fixing board, then install the rear board, see Figure 2-21;
Fan fixing board
Remove the three
fixing screws
Pallet
Backward fan
Figure 2-21 Removing backward fan fixing board
b. Place the unit to the actual installation location, and remove backward fan transportation fixing board and
pallet, see Figure 2-22;
Remove the humidifier water tray drain pipe;
Remove the transportation fixing board (7 fixing screws);
Remove the pallet (2 fixing screws);
Note
When removing the pallet, you must grasp the handle and support the fan so as to prevent the fan from falling.
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Liebert.PEX Chilled Water Series Air Conditioner User Manual
Fixing screws (7 pcs)
Back ward fan
Handle
Transportation
fixing board
Pallet
Fixing screws (2 pcs)
Revolving axis (each
in left and right side)
Pallet
Humidifier water
tray drain pipe
Figure 2-22 Removing backward fan transportation fixing board and pallet
c. Grasp the handle, make a slow 90° rotation CCW of backward fan, so the fan would sink under pallet, see
Figure 2-23;
d. Install the fan fixing board, and tighten the 5 fixing screws, see Figure 2-23.
Backward fan
Pallet
Fan fixing board
Fan protective screening
Fixing screws (5 pcs)
Figure 2-23 Fan sinking under floor
2.4 Piping
The pipes to connect include:
1. Water drain-pipe of the unit.
2. Water inlet pipe of infrared humidifier.
3. Chilled water inlet and outlet pipes.
Connecting the water drain-pipe of the unit
The condensing water of infrared humidifier and evaporator is converged by the cross connector and drains
through the drain pipe, as shown in Figure 2-24. The outer diameter (OD) of the pipe is 25mm. If the drain pipe
is used by three or more units, the minimal OD of the pipe should be 40mm.
Note
1. A Φ25 hose clamp is delivered as an accessory to connect the drain pipe.
2. Because the humidifier contains boiling water, the plastic pipe must be rated higher than 194°F.
3. When connecting the drain pipe, make sure that the U bend is installed vertically and the ‘U’ shape is not distorted, so as to
ensure that the cooling water can be drained immediately and effectively.
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Liebert.PEX Chilled Water Series Air Conditioner User Manual
Infrared humidifier
water in connecting
pipe
Connecting pipe of
condensed water drain
pipe
Condensed water
tray connection
Condensed water
drain pipe connection
Hose clamp
Cross connector
Infrared
humidifier water
tray conncetion
Condensed water
tray connection
Figure 2-24 Connection of water in and out pipes
Connecting water inlet pipe of infrared humidifier
Connect water pipes for the infrared humidifier. To facilitate maintenance, a strainer / non-return isolation
valve is fitted to the supply water pipe. The infrared humidifier reserves a copper pipe (OD: 6.35mm) as shown
in Figure 2-25. 1/4” copper screw nut is put at the end of the copper pipe. Please connect it with the 1/4” × 1/2”
converted copper thread in the attached bag. Connect it with pipes according to the site condition. Make sure
the connection is well sealed to prevent leakage. The pipe pressure is 100kPa ~ 700kPa.
Where the main pressure may rise above 700kPa, a pressure reducer should be fitted. Where the pressure
falls below 100kPa, a water tank and pump system should be used.
Note
Main water supply connections must be made in accordance with local laws and regulations.
A direction
Amplification in A direction
Transport fastener
Water level regulator
Charge
electromagnetic
valve
Water level sensor
Heating over-temperature
protection switch (at the
bottom of water tray)
Charge pipe
Water tray
Heating over-temperature
protection switch
Water out connector
Ceramic terminal base
Overheat protective ralay
Stainless steel
double-screw bolt
Water tray fixing screw
(one at each side)
Water in pipe ODФ 6.35 mm
Φ
Figure 2-25
Infrared humidifier
Connecting chilled water inlet and outlet pipes
The chilled water inlet and outlet pipes are connected with the chilled water unit by welding, as shown in
Figure 2-26. Inlet and outlet pipes should be welded according to the labels on the unit. Please do not reverse
the connection. Chilled water inlet and outlet pipes can be connected through the bottom plate or the side
plate. For the pipe entrance, please refer to Figure 2-13, Figure 2-14 and Figure 2-15. The chilled water inlet
and outlet pipes should have soft connector at the unit connections. The chilled water inlet pipes should be
equipped with the water filter with over 60 meshes to facilitate the clearance of impurities in the pipes. The
chilled water inlet and outlet pipes need to be equipped with several isolation valves, which can cut off water
sources during maintenance. One of the isolation valves can be a balancing valve. Chilled water system with
a balancing valve would be more efficient and more accurate in controlling water distribution. For detailed
distribution, please refer to Figure 2-6.
Water pressure should be able to overcome the water pressure drop caused by all the components of water
system. Considering the possibility that water pressure drop would increase due to incrustation and
impurities resulted from long-time running of the system. Therefore, when choosing the head components
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Liebert.PEX Chilled Water Series Air Conditioner User Manual
(e.g. pump), we should consider making 20% ~ 25% redundancy. The weight of the water pipes connected
with the unit should not be assumed by the unit. The chilled water inlet and outlet pipes must be kept warm.
Table 2-4 shows the connecting dimensions of chilled water in and out pipes of various units.
Water in pipe
Water out pipe
Water outlet pipe
Water inlet pipe
Figure 2-26 Welding figure of chilled water in and out pipes
Table 2-4 OD of chilled water in and out pipes
Model
OD of chilled water in and out pipes
(mm)
Model
OD of chilled water in and out pipes
(mm)
P1020 32 P2090 42
P1030 32 P2100 42
P1040 32 P3110 54
P1050 32 P3140 54
P2050 42 P3150 54
P2070 42
2.5 Removing Transport Fastener And Vibration Absorber
In order to protect partial components from being damaged and distorted due to bumping, impact and
resonation, fasteners and vibration absorbers are mounted at certain locations before delivery. Remove the
fasteners and vibration absorbers before installation and commissioning.
Removing transport binding belt of front door
To protect the front door from moving during transport, tighten the gemel of the front door with binding string.
Before putting the unit into operation, you should cut the binding string. Each front door needs two binding
strings. See Figure 2-27 for their position.
Front door
Binding string
Gemel
Figure 2-27 Binding string of front door
Removing transport fastener of fan components
1. Upflow unit
To minimize the fan operation noise and prolong the belt life, the motor base of the fan is designed with a
semi-free self-tension structure. During transportation, to protect the semi-free structure from failing or
collapsing due to resonation, the upflow unit is especially fastened with sheet metal connector (left and right
symmetrical, one at each side), as shown in Figure 2-28.
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Liebert.PEX Chilled Water Series Air Conditioner User Manual
You should cut the binding string on the belt and remove the sheet metal connectors on both sides of the
motor before the power-on operation. Removing the sheet metal connectors requires the collaboration of two
persons, with one holding the motor and the other removing the sheet metal connector.
Note
After opening the front door of unit, you will see a warning label concerning the removal of the sheet metal connector on the
sealing panel of the fan. Do remove the sheet metal connector by following the preceding instructions.
Sheet metal connector,
one at each side
Binding string
Figure 2-28 Transportation fan unit binding screw and string
2. Downflow unit
During transportation, to protect the semi-free structure from falling or collapsing due to resonation, the
motor mounting plate is fixed on the bottom plate with connector by bolts, as shown in Figure 2-29. You must
remove the two connectors before the power-on operation.
Sheet metal connector,
one at each side
Figure 2-29 Transportation fan unit binding screw
Note
In any case, never put hands into the triangle gap between the motor installation board and base.
Removing the transport components of infrared humidifier
In order to protect the infrared humidifier lamp from being damaged during transportation, the transport
protection foam should be fitted to the infrared humidifier components. Before operating the unit, check the
protection foam, and connect high water-level detection switch cable. If you operate the unit without
complying with this, the infrared humidifier cannot operate normally and fire may be caused.
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