Huawei NetCol8000-C User manual

NetCol8000-C(070-260) In-room Chilled Water
Smart Cooling Product
User Manual
Issue
06
Date
2020-01-13
HUAWEI TECHNOLOGIES CO., LTD.

Issue 06 (2020-01-13)
Copyright © Huawei Technologies Co., Ltd.
i
Copyright © Huawei Technologies Co., Ltd. 2020. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior
written consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective
holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei and
the customer. All or part of the products, services and features described in this document may not be
within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements,
information, and recommendations in this document are provided "AS IS" without warranties, guarantees or
representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address:
Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website:
https://e.huawei.com

NetCol8000-C(070-260) In-room Chilled Water Smart
Cooling Product
User Manual
About This Document
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Copyright © Huawei Technologies Co., Ltd.
ii
About This Document
Purpose
This document describes the NetCol8000-C, a room-level cooling system, in terms of its
precautions, product description, installation, commissioning, controller, operation and
maintenance (O&M).
Smart cooling products mentioned in this manual are dedicated equipment for data centers.
Intended Audience
This document is intended for:
Sales personnel
Technical support personnel
System engineers
Hardware installation personnel
Commissioning engineers
Data configuration engineers
Maintenance personnel
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol
Description
Indicates a hazard with a high level of risk which, if not
avoided, will result in death or serious injury.
Indicates a hazard with a medium level of risk which, if not
avoided, could result in death or serious injury.
Indicates a hazard with a low level of risk which, if not
avoided, could result in minor or moderate injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in equipment damage, data loss,
performance deterioration, or unanticipated results.

NetCol8000-C(070-260) In-room Chilled Water Smart
Cooling Product
User Manual
About This Document
Issue 06 (2020-01-13)
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iii
Symbol
Description
NOTICE is used to address practices not related to personal
injury.
Supplements the important information in the main text.
NOTE is used to address information not related to personal
injury, equipment damage, and environment deterioration.
Change History
Changes between document issues are cumulative. The latest document issue contains all the
changes made in earlier issues.
Issue 06 (2020-01-13)
Updated the safety information.
Issue 05 (2019-01-15)
Updated the manual name and so on.
Issue 04 (2018-09-30)
Optimized the Connecting an Upflow Differential Pressure Sensor section and so on.
Issue 03 (2018-03-31)
Optimized the technical specifications section.
Issue 02 (2017-11-25)
Added content for upflow units.
Issue 01 (2017-06-30)
This issue is the first office release.

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User Manual
Contents
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Contents
About This Document.................................................................................................................... ii
1 Safety Information........................................................................................................................1
1.1 General Safety ..............................................................................................................................................................1
1.2 Personnel Requirements ...............................................................................................................................................4
1.3 Electrical Safety............................................................................................................................................................4
1.4 Installation Environment Requirements .......................................................................................................................6
1.5 Mechanical Safety ........................................................................................................................................................7
1.6 Cooling System Safety ...............................................................................................................................................10
1.7 Others .........................................................................................................................................................................10
2 Product Overview .......................................................................................................................11
2.1 Model Description...................................................................................................................................................... 11
2.2 Appearance and Components......................................................................................................................................12
2.3 Controller....................................................................................................................................................................18
2.3.1 Appearance and Ports ..............................................................................................................................................18
2.3.2 Functions and Features ............................................................................................................................................21
2.4 Monitoring System .....................................................................................................................................................22
2.5 Operating Conditions..................................................................................................................................................22
2.6 Technical Specifications .............................................................................................................................................24
3 Installation Guide .......................................................................................................................29
3.1 Installation Precautions...............................................................................................................................................29
3.1.1 Precautions...............................................................................................................................................................29
3.1.2 Tools ........................................................................................................................................................................32
3.1.3 Material Preparations...............................................................................................................................................34
3.1.3.1 Water Inlet Pipe of the Wet Film Humidifier........................................................................................................34
3.1.3.2 Drainpipe ..............................................................................................................................................................35
3.1.3.3 Chilled Water Inlet and Outlet Pipes.....................................................................................................................36
3.1.3.4 Pipe Support Preparations.....................................................................................................................................36
3.1.3.5 Cables ...................................................................................................................................................................37
3.2 System Layout Diagram .............................................................................................................................................40
3.2.1 Upflow.....................................................................................................................................................................40
3.2.2 Downflow................................................................................................................................................................41
3.3 Transportation and Unpacking....................................................................................................................................42

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3.3.1 Removing the Packing.............................................................................................................................................42
3.3.2 Checking Fittings.....................................................................................................................................................42
3.4 Installing the Equipment.............................................................................................................................................42
3.4.1 Checking the Nitrogen Pressure ..............................................................................................................................42
3.4.2 Exhausting Nitrogen................................................................................................................................................44
3.4.3 Removing the Pallet.................................................................................................................................................46
3.4.4 (Optional) CabinetAssembly (Applicable only to Downflow Units with Four Doors)...........................................47
3.4.5 (Optional) Moving the Cabinet to the Installation Position (Disassembled Cabinet)..............................................52
3.4.6 Securing Equipment.................................................................................................................................................54
3.4.7 Lowering a Fan (Applicable To Downflow Units) ..................................................................................................55
3.5 Connecting Pipelines..................................................................................................................................................60
3.5.1 Cabinet Hole Positions ............................................................................................................................................60
3.5.1.1 Holes in the Side Panel.........................................................................................................................................61
3.5.1.2 Holes at the Bottom ..............................................................................................................................................63
3.5.2 Connecting the Chilled Water Pipe..........................................................................................................................63
3.5.2.1 Upflow..................................................................................................................................................................65
3.5.2.1.1 Bottom Pipe Routing .........................................................................................................................................65
3.5.2.1.2 Side Pipe Routing ..............................................................................................................................................66
3.5.2.2 Downflow.............................................................................................................................................................69
3.5.2.2.1 Bottom Pipe Routing .........................................................................................................................................69
3.5.2.2.2 Side Pipe Routing ..............................................................................................................................................70
3.5.3 Connecting Water Pipes...........................................................................................................................................73
3.5.3.1 Connecting the Drainpipe.....................................................................................................................................73
3.5.3.2 (Optional) Connecting the Water Inlet Pipe for the Wet Film Humidifier............................................................75
3.5.4 (Optional) Leakage Test with Nitrogen....................................................................................................................76
3.5.5 Leakage Test with Water..........................................................................................................................................78
3.6 Cable Connections......................................................................................................................................................81
3.6.1 Precautions...............................................................................................................................................................81
3.6.2 Positions of Electric Ports........................................................................................................................................81
3.6.3 Connecting Power Cables........................................................................................................................................84
3.6.4 Connecting Signal Cables........................................................................................................................................95
3.6.5 Teamwork Networking and Monitoring...................................................................................................................97
3.6.5.1 Main Control Module ...........................................................................................................................................97
3.6.5.2 Connecting the CAN Teamwork Network Cable..................................................................................................97
3.6.5.3 Connecting the Monitoring Network Cable........................................................................................................100
3.6.6 (Optional) Connecting the Water Leakage Sensor.................................................................................................102
3.6.7 (Optional) Connecting the Gravity Damper (Applicable To Upflow Units)..........................................................104
3.6.8 (Optional) Connecting the Motorized Damper (Applicable To Downflow Units) ................................................104
3.6.9 (Optional) Connecting the T/H Sensor Outside the Cabinet..................................................................................105
3.6.10 (Optional) Connecting the Direct free-cooling plenum.......................................................................................107
3.6.11 (Optional) Connecting a Differential Pressure Sensor.........................................................................................108
3.6.11.1 Connecting an Upflow Differential Pressure Sensor ........................................................................................108

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3.6.11.2 Connecting a Downflow Differential Pressure Sensor...................................................................................... 111
3.6.12 (Optional) Installing a Cap (Applicable to Upflow Units)................................................................................... 114
3.7 Installation Verification............................................................................................................................................. 117
4 Commissioning..........................................................................................................................121
4.1 Preparing for Power-On............................................................................................................................................121
4.2 Power-On..................................................................................................................................................................122
4.3 Home Screen.............................................................................................................................................................127
4.4 Initial Configuration .................................................................................................................................................129
4.4.1 Setting Temperature and Humidity Values and Enabling T/H Sensors..................................................................129
4.4.2 (Optional) Setting the Pressure Difference Control...............................................................................................131
4.4.3 Setting Teamwork Control Parameters ..................................................................................................................132
4.4.4 Setting Communications Parameters.....................................................................................................................138
4.4.4.1 Setting Communications Parameters (Modbus RTU Protocol) ..........................................................................138
4.4.4.2 Setting Communications Parameters (Modbus TCP Protocol)...........................................................................138
4.4.4.3 Setting Communications Parameters (SNMP Protocol) .....................................................................................140
4.4.5 (Optional) Setting WIFI Parameters......................................................................................................................145
4.5 Startup.......................................................................................................................................................................146
4.6 Startup Wizard..........................................................................................................................................................153
4.7 (Optional) Power-off.................................................................................................................................................157
4.8 Checking After Commissioning................................................................................................................................158
5 WebUI .........................................................................................................................................160
5.1 Preparations and WebUI Login.................................................................................................................................160
5.2 WebUI Introduction..................................................................................................................................................163
6 System Operation and Maintenance.....................................................................................167
6.1 Routine Maintenance Overview ...............................................................................................................................167
6.2 Monthly Maintenance...............................................................................................................................................168
6.3 Semiannual Maintenance Items................................................................................................................................169
6.4 Annual Maintenance.................................................................................................................................................171
6.5 Alarm References......................................................................................................................................................171
6.6 Troubleshooting........................................................................................................................................................237
6.7 Parts Replacement ....................................................................................................................................................239
6.7.1 Replacing the Air Filter..........................................................................................................................................239
6.7.2 Replacing the Wet Film Humidifier.......................................................................................................................241
6.7.3 Replacing the Differential Pressure Switch ...........................................................................................................243
6.7.4 Replacing a T/H sensor..........................................................................................................................................245
6.7.5 Replacing the Water Valve Actuator (Inapplicable to 52272560 and 52272562) ..................................................247
6.7.6 Replacing the Water Valve Actuator (Applicable Only to 52272560 and 52272562)............................................249
6.7.7 Replacing the Chilled Water Valve........................................................................................................................250
6.7.8 Replacing the Fan..................................................................................................................................................252
6.7.8.1 Replacing the Fan (Upflow) ...............................................................................................................................252
6.7.8.2 Replacing the Fan (Downflow)...........................................................................................................................257

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6.7.9 Replacing the PSU.................................................................................................................................................264
6.7.10 Replacing the Electric Heater ..............................................................................................................................265
6.7.10.1 Replacing the Electric Heater (Upflow)............................................................................................................266
6.7.10.2 Replacing the Electric Heater (Downflow).......................................................................................................268
6.7.11 Replacing the Low Liquid Level Detector...........................................................................................................270
7 FAQ..............................................................................................................................................274
7.1 Operations on the LCD.............................................................................................................................................274
7.1.1 Querying Temperature and Humidity Curves........................................................................................................274
7.1.2 Querying Logs.......................................................................................................................................................275
7.1.3 Querying System Parameters.................................................................................................................................275
7.1.4 Querying Version Details.......................................................................................................................................276
7.1.5 How to View Teamwork Control Information.......................................................................................................277
7.1.6 How to Silence the Buzzer.....................................................................................................................................277
7.1.7 How Can I Handle Active Alarms?........................................................................................................................277
7.1.8 Deleting Historical Alarms ....................................................................................................................................279
7.1.9 Deleting Logs ........................................................................................................................................................279
7.1.10 Clearing the Runtime...........................................................................................................................................280
7.1.11 Calibrating a Sensor.............................................................................................................................................280
7.1.12 Calibrating the Screen..........................................................................................................................................281
7.1.13 How to Modify a Password .................................................................................................................................282
7.1.14 How to Set Alarm Parameters..............................................................................................................................285
7.1.15 How to Commission Single Component..............................................................................................................286
7.1.16 Restoring Factory Settings...................................................................................................................................287
7.1.17 Which Parameters Are Restored to Default ValuesAfter Default Settings Are Operated....................................288
7.1.18 Exporting Data.....................................................................................................................................................289
7.1.19 How to Export and Import a Configuration file...................................................................................................290
7.1.20 How to Change the SSH Access Password..........................................................................................................294
7.1.21 How to Import a Certificate and a Key................................................................................................................297
7.1.22 Correlation Relationship of Parameters...............................................................................................................298
7.2 WebUI Operations ....................................................................................................................................................299
7.2.1 How to Manage WebUI Users? .............................................................................................................................299
7.2.2 How to Install a Network Security Certificate?.....................................................................................................301
7.2.3 How Can I View ActiveAlarms and Historical Alarms?.......................................................................................302
7.2.4 How Can I Export or Import a Configuration File?...............................................................................................302
7.2.5 How Can I Export Fault Information?...................................................................................................................303
7.2.6 How Can I Change the Smart Cooling Product IPAddress on the WebUI?..........................................................303
7.2.7 How Can I View Version Information?..................................................................................................................304
8 Glycol Adding Requirements.................................................................................................305
A Appendix ...................................................................................................................................306
A.1 Electrical Conceptual Diagram................................................................................................................................306
A.2 Acronyms and Abbreviations...................................................................................................................................317

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1 Safety Information
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1 Safety Information
1.1 General Safety
Statement
Before installing, operating, and maintaining the equipment, read this document and observe
all the safety instructions on the equipment and in this document.
The"NOTICE", "CAUTION", "WARNING", and "DANGER" statements in this document do
not cover all the safety instructions. They are only supplements to the safety instructions.
Huawei will not be liable for any consequence caused by the violation of general safety
requirements or design, production, and usage safety standards.
Ensure that the equipment is used in environments that meet its design specifications.
Otherwise, the equipment may become faulty, and the resulting equipment malfunction,
component damage, personal injuries, or property damage are not covered under the warranty.
Follow local laws and regulations when installing, operating, or maintaining the equipment.
The safety instructions in this document are only supplements to local laws and regulations.
Huawei will not be liable for any consequences of the following circumstances:
Operation beyond the conditions specified in this document
Installation or use in environments which are not specified in relevant international or
national standards
Unauthorized modifications to the product or software code or removal of the product
Failure to follow the operation instructions and safety precautions on the product and in
this document
Equipment damage due to force majeure, such as earthquakes, fire, and storms
Damage caused during transportation by the customer
Storage conditions that do not meet the requirements specified in this document
General Requirements
Do not install, use, or operate outdoor equipment and cables (including but not limited to
moving equipment, operating equipment and cables, inserting connectors to or removing
connectors from signal ports connected to outdoor facilities, working at heights, and
performing outdoor installation) in harsh weather conditions such as lightning, rain,
snow, and level 6 or stronger wind.

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Before installing, operating, or maintaining the equipment, remove any conductive
objects such as watches or metal jewelry like bracelets, bangles, and rings to avoid
electric shock.
When installing, operating, or maintaining the equipment, wear dedicated protective
gears such as insulation gloves, goggles, and safety clothing, helmet, and shoes, as
shown in the following figure.
Follow the specified procedures for installation, operation, and maintenance.
Before handling a conductor surface or terminal, measure the contact point voltage and
ensure that there is no risk of electric shock.
After installing the equipment, remove idle packing materials such as cartons, foam,
plastics, and cable ties from the equipment area.
In the case of a fire, immediately leave the building or the equipment area, and turn on
the fire alarm bell or make an emergency call. Do not enter the building on fire in any
case.
Do not stop using protective devices. Pay attention to the warnings, cautions, and related
precautionary measures in this document and on the equipment. Promptly replace
warning labels that have worn out.
Keep irrelevant people away from the equipment. Only operators are allowed to access
the equipment.
Use insulated tools or tools with insulated handles, as shown in the following figure.

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All cable holes should be sealed. Seal the used cable holes with firestop putty. Seal the
unused cable holes with the caps delivered with the cabinet. The following figure shows
the criteria for correct sealing with firestop putty.
Do not scrawl, damage, or block any warning label on the equipment.
Tighten the screws using tools when installing the equipment.
Do not work with power on during installation.
Repaint any paint scratches caused during equipment transportation or installation in a
timely manner. Equipment with scratches cannot be exposed to an outdoor environment
for a long period of time.
Before operations, ensure that the equipment is firmly secured to the floor or other solid
objects, such as a wall or an installation rack.
Do not use water to clean electrical components inside or outside of a cabinet.
Do not change the structure or installation sequence of equipment without permission.
Do not touch a running fan with your fingers, components, screws, tools, or boards
before the fan is powered off or stops running.
Personal Safety
If there is a probability of personal injury or equipment damage during operations on the
equipment, immediately stop the operations, report the case to the supervisor, and take
feasible protective measures.
To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to
telecommunication network voltage (TNV) circuits.

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Do not power on the equipment before it is installed or confirmed by professionals.
1.2 Personnel Requirements
Personnel who plan to install or maintain Huawei equipment must receive thorough
training, understand all necessary safety precautions, and be able to correctly perform all
operations.
Only qualified professionals or trained personnel are allowed to install, operate, and
maintain the equipment.
Only qualified professionals are allowed to remove safety facilities and inspect the
equipment.
Personnel who will operate the equipment, including operators, trained personnel, and
professionals, should possess the local national required qualifications in special
operations such as high-voltage operations, working at heights, and operations of special
equipment.
Professionals: personnel who are trained or experienced in equipment operations and are
clear of the sources and degree of various potential hazards in equipment installation,
operation, maintenance
Trained personnel: personnel who are technically trained, have required experience, are
aware of possible hazards on themselves in certain operations, and are able to take
protective measures to minimize the hazards on themselves and other people
Operators: operation personnel who may come in contact with the equipment, except
trained personnel and professionals
Only professionals or authorized personnel are allowed to replace the equipment or
components (including software).
1.3 Electrical Safety
Grounding
For the equipment that needs to be grounded, install the ground cable first when
installing the equipment and remove the ground cable last when removing the
equipment.
Do not damage the ground conductor.
Do not operate the equipment in the absence of a properly installed ground conductor.
Ensure that the equipment is connected permanently to the protective ground. Before
operating the equipment, check its electrical connection to ensure that it is securely
grounded.
General Requirements
Use dedicated insulated tools when performing high-voltage operations.
AC and DC Power

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Do not connect or disconnect power cables with power on. Transient contact between the core
of the power cable and the conductor will generate electric arcs or sparks, which may cause
fire or personal injury.
If a "high electricity leakage" tag is attached on the equipment, ground the protective
ground terminal on the equipment enclosure before connecting theAC power supply;
otherwise, electric shock as a result of electricity leakage may occur.
Before installing or removing a power cable, turn off the power switch.
Before connecting a power cable, check that the label on the power cable is correct.
If the equipment has multiple inputs, disconnect all the inputs before operating the
equipment.
A circuit breaker equipped with a residual current device (RCD) is not recommended.
A damaged power cable must be replaced by the manufacturer, service agent, or
professionals to avoid risks.
High voltage operations and installation ofAC-powered facilities must be performed by
qualified personnel.
Cabling
When routing cables, ensure that a distance of at least 30 mm exists between the cables
and heat-generating components or areas. This prevents damage to the insulation layer of
the cables.
Do not route cables behind the air intake and exhaust vents of the equipment.
Ensure that cables meet the VW-1 flame spread rating requirements.
Bind cables of the same type together. When routing cables of different types, ensure that
they are at least 30 mm away from each other.
If an AC input power cable is connected to the cabinet from the top, bend the cable in a
U shape outside the cabinet and then route it into the cabinet.
When the temperature is low, violent impact or vibration may damage the plastic cable
sheathing. To ensure safety, comply with the following requirements:
Cables can be laid or installed only when the temperature is higher than 0°C. Handle
cables with caution, especially at a low temperature.
Cables stored at subzero temperatures must be stored at room temperature for at least 24
hours before they are laid out.
Do not perform any improper operations, for example, dropping cables directly from a
vehicle.
When selecting, connecting, and routing cables, follow local safety regulations and rules.
ESD
The static electricity generated by human bodies may damage the electrostatic-sensitive
components on boards, for example, the large-scale integrated (LSI) circuits.

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Wear ESD gloves or a well-grounded ESD wrist strap when touching the device or
handling boards or application-specific integrated circuits (ASICs).
When holding a board, hold its edge without touching any components. Do not touch the
components with your bare hands.
Package boards with ESD packaging materials before storing or transporting them.
Figure 1-1 Wearing an ESD wrist strap
Neutral-Ground Voltage
It is recommended that the three-phase loads be equalized and the neutral-ground voltage be
kept at less than 2 V to meet power distribution requirements.
1.4 Installation Environment Requirements
To prevent fire due to high temperature, ensure that the ventilation vents or heat
dissipation system are not blocked when the equipment is running.
Install the equipment in an area far away from liquids. Do not install it under areas prone
to condensation, such as under water pipes and air exhaust vents, or areas prone to water
leakage, such as air conditioner vents, ventilation vents, or feeder windows of the
equipment room. Ensure that no liquid enters the equipment to prevent faults or short
circuits.
If any liquid is detected inside the equipment, immediately disconnect the power supply
and contact the administrator.
Do not expose the equipment to flammable or explosive gas or smoke. Do not perform
any operation on the equipment in such environments.
Ensure that the equipment room provides good heat insulation, and the walls and floor
are dampproof.
Install a rat guard at the door of the equipment room.

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Installation at Heights
Working at heights refers to operations that are performed at least 2 meters above the
ground.
Do not work at heights if the steel pipes are wet or other potential danger exists. After the
preceding conditions no longer exist, the safety director and relevant technical personnel
need to check the involved equipment. Operators can begin working only after obtaining
consent.
When working at heights, comply with local relevant laws and regulations.
Only trained and qualified personnel are allowed to work at heights.
Before working at heights, check the climbing tools and safety gears such as safety
helmets, safety belts, ladders, springboards, scaffolding, and lifting equipment. If they do
not meet the requirements, take corrective measures or disallow working at heights.
Wear personal protective equipment such as the safety helmet and safety belt or waist
rope and fasten it to a solid structure. Do not mount it on an insecure moveable object or
metal object with sharp edges. Make sure that the hooks will not slide off.
Set a restricted area and eye-catching signs for working at heights to warn away
irrelevant personnel.
Carry the operation machinery and tools properly to prevent them from falling off and
causing injuries.
Personnel involving working at heights are not allowed to throw objects from the height
to the ground, or vice versa. Objects should be transported by tough slings, hanging
baskets, highline trolleys, or cranes.
Ensure that guard rails and warning signs are set at the edges and openings of the area
involving working at heights to prevent falls.
Do not pile up scaffolding, springboards, or other sundries on the ground under the area
involving working at heights. Do not allow people to stay or pass under the area
involving working at heights.
Inspect the scaffolding, springboards, and workbenches used for working at heights in
advance to ensure that their structures are solid and not overloaded.
Any violations must be promptly pointed out by the site manager or safety supervisor
and the involved personnel should be prompted for correction. Personnel who fail to stop
violations will be forbidden from working.
1.5 Mechanical Safety
Hoisting Devices
Do not walk under hoisted objects.
Only trained and qualified personnel should perform hoisting operations.
Check that hoisting tools are available and in good condition.
Before hoisting objects, ensure that hoisting tools are firmly secured onto a load-bearing
object or wall.
Ensure that the angle formed by two hoisting cables is no more than 90 degrees, as
shown in the following figure.

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Do not drag steel ropes and hoisting tools or bump hoisted objects against hard objects
during hoisting.
Using Ladders
Use wooden or fiberglass ladders when you need to perform live working at heights.
When a step ladder is used, ensure that the pull ropes are secured and the ladder is held
firm.
Before using a ladder, check that it is intact and confirm its load bearing capacity. Do not
overload it.
Ensure that the ladder is securely positioned. The recommended angle for a ladder
against the floor is 75 degrees, as shown in the following figure. An angle rule can be
used to measure the angle. Ensure that the wider end of the ladder is at the bottom, or
protective measures have been taken at the bottom to prevent the ladder from sliding.
When climbing a ladder, take the following precautions to reduce risks and ensure
safety:
Keep your body steady.
Do not climb higher than the fourth rung of the ladder from the top.
Ensure that your body's center of gravity does not shift outside the legs of the ladder.

NetCol8000-C(070-260) In-room Chilled Water Smart
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Drilling Holes
When drilling holes into a wall or floor, observe the following safety precautions:
Do not drill holes into the equipment. Doing so may affect the electromagnetic shielding of
the equipment and damage components or cables inside. Metal shavings from drilling may
short-circuit boards inside the equipment.
Obtain the consent from the customer, subcontractor, and Huawei before drilling.
Wear goggles and protective gloves when drilling holes.
When drilling holes, protect the equipment from shavings.After drilling, clean up any
shavings that have accumulated inside or outside the equipment.
Moving Heavy Objects
When removing a heavy or unstable component from a cabinet, be aware of unstable or heavy
objects on the cabinet.
Be cautious to avoid injury when moving heavy objects.
When moving the equipment by hand, wear protective gloves to prevent injuries.
Move or lift the equipment by holding its handles or lower edges. Do not hold the
handles of modules (such as power supply units, fans, and boards) that are installed in
the equipment because they cannot support the weight of the equipment.
Avoid scratching the cabinet surface or damaging cabinet components and cables during
equipment transportation.
When transporting the equipment using a forklift truck, ensure that the forks are properly
positioned to ensure that the equipment does not topple. Before moving the equipment,
secure it to the forklift truck using ropes. When moving the equipment, assign dedicated
personnel to take care of it.
Choose railways, sea, or a road with good condition for transportation to ensure
equipment safety. Avoid tilt or jolt during transportation.
Move a cabinet with caution. Any bumping or falling may damage the equipment.

NetCol8000-C(070-260) In-room Chilled Water Smart
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User Manual
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1.6 Cooling System Safety
Welding
At least two persons are required on a welding site.
A welder must have a work permit.
A welding site must be free from inflammables.
Ensure that a fire extinguisher, wet wiper, and water container are available.
A burning welding torch must not be placed on a component or on the floor, and must
not be placed in a metal container with acetylene and oxygen. Otherwise, the gas may
leak and cause a fire.
High-temperature pipes after welding must be promptly cooled.
Do not weld or cut on pressurized containers or pipes. Electric devices must be powered
off before welding.
High Temperature and Pressure
When maintaining or replacing components, pay attention to high-temperature
components (such as the compressor, refrigerant pipe, and electric heater) to prevent
scalds.
When maintaining or replacing components, pay attention to high-pressure components
(such as the compressor and refrigerant pipe) to prevent the refrigerant system from
being cracked or exploded due to misoperations.
Refrigerant Frostbite
Refrigerant leakage may cause frostbite. Take protective measures (for example, wear
antifreeze gloves) when handling refrigerant.
Storage and Recycling
Do not store devices near a heat source or under direct sunshine.
Keep devices away from fire or high-temperature objects, especially devices injected
with pressurized nitrogen or refrigerant; otherwise, explosion or refrigerant leakage may
occur, causing personal injury.
The sign indicates that the product cannot be disposed of with other wastes that
have a shell in European Union (EU) areas. To avoid environment pollution and harm to
human health, wastes must be classified and recycled. This also promotes resource reuse.
When recycling a device, fill in the device information in the recycling collection system
or contact your dealer for help. The dealer can help you recycle devices in a safe and
environment-friendly way.
1.7 Others
Exercise caution when shutting down the smart cooling product. Doing so may cause
equipment and room overheating, which will damage the equipment.

NetCol8000-C(070-260) In-room Chilled Water Smart
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User Manual
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2 Product Overview
2.1 Model Description
Figure 2-1 Naming conventions 1

NetCol8000-C(070-260) In-room Chilled Water Smart
Cooling Product
User Manual
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Copyright © Huawei Technologies Co., Ltd.
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Figure 2-2 Naming conventions 2
2.2 Appearance and Components
Appearance
The NetCol8000-C in-room chilled water smart cooling product downflow units have four
architectures: one-door, two-door, three-door, and four-door (for downflow units only and
onsite assembly required), and the upflow units have three architectures: one-door, two-door,
and three-door, as shown in the following figures.