Huawei NetCol5000-A020 User manual

Part Number: 31010QPN
NetCol5000-A020 Air Cooled In-row Precision Air
Conditioner
V100R002
User Manual
Issue
01
Date
2014-06-30
HUAWEI TECHNOLOGIES CO., LTD.

Issue 01 (2014-06-30)
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Copyright © Huawei Technologies Co., Ltd.
i
Copyright © Huawei Technologies Co., Ltd. 2014. 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:
http://www.huawei.com
Email:
[email protected]

NetCol5000-A020 Air Cooled In-row Precision Air
Conditioner
User Manual
About This Document
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ii
About This Document
Purpose
This document describes the NetCol5000-A020, an air cooled in-row precision air conditioner,
in terms of its precautions, product description, installation guide, commissioning, operation
and maintenance (O&M). It helps users rapidly learn the operation and maintenance (O&M)
of the NetCol5000-A020.
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 in the following table.
Symbol
After the system is restarted, use the kmtune
command to check the kernel parameters to ensure
that the setting is valid.
Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.

NetCol5000-A020 Air Cooled In-row Precision Air
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User Manual
About This Document
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Symbol
After the system is restarted, use the kmtune
command to check the kernel parameters to ensure
that the setting is valid.
Indicates a potentially hazardous situation which, if not
avoided, could result in equipment damage, data loss,
performance deterioration, or unanticipated results.
NOTICE is used to address practices not related to personal
injury.
Calls attention to important information, best practices and
tips.
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 01 (2014-06-30)
This issue is the first official release.

NetCol5000-A020 Air Cooled In-row Precision Air
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User Manual
Contents
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Contents
About This Document.................................................................................................................... ii
1 Precautions .....................................................................................................................................1
1.1 Safety Precautions ........................................................................................................................................................1
1.2 Electrical Safety............................................................................................................................................................2
1.3 Mechanical Safety ........................................................................................................................................................4
1.4 Running Safety .............................................................................................................................................................5
1.5 Others............................................................................................................................................................................5
2 Product Description......................................................................................................................7
2.1 Model Description........................................................................................................................................................7
2.2 Composition of an Indoor Unit.....................................................................................................................................7
2.3 Monitoring function......................................................................................................................................................9
2.3.1 Controller...................................................................................................................................................................9
2.3.2 Monitoring System ..................................................................................................................................................10
2.4 Application Environment............................................................................................................................................11
2.5 Technical Specifications .............................................................................................................................................13
3 Installation Guide.......................................................................................................................15
3.1 Installation Preparations .............................................................................................................................................15
3.1.1 Preparing Tools........................................................................................................................................................15
3.1.2 Material Preparations...............................................................................................................................................17
3.1.3 Installation Precautions............................................................................................................................................24
3.1.4 Installation Layout...................................................................................................................................................26
3.2 Transportation and Unpacking....................................................................................................................................28
3.3 Installation Flowchart.................................................................................................................................................30
3.4 Mechanical Installation...............................................................................................................................................31
3.5 Install the outdoor unit................................................................................................................................................39
3.6 Exhausting Nitrogen...................................................................................................................................................39
3.7 Connecting Pipelines ..................................................................................................................................................40
3.7.1 Routing Refrigerant Pipes........................................................................................................................................41
3.7.2 Connecting Water Pipes...........................................................................................................................................43
3.7.3 Leak Checking.........................................................................................................................................................44
3.8 Electrical Connection..................................................................................................................................................45
3.8.1 Cable Installation.....................................................................................................................................................45

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3.8.2 Connecting Power Cables........................................................................................................................................46
3.8.3 Installing the Voltage Jumper...................................................................................................................................47
3.8.4 Connecting the Signal Cables..................................................................................................................................48
3.8.4.1 Preparations Before Connection ...........................................................................................................................48
3.8.4.2 Connecting Outdoor Unit On/Off Signal Cable....................................................................................................51
3.8.4.3 Connecting a Water Sensor...................................................................................................................................52
3.8.5 Teamwork Networking and Monitoring...................................................................................................................52
3.8.6 Installing T/H Sensors .............................................................................................................................................55
3.9 Connections Verification.............................................................................................................................................57
4 Power-On Commissioning........................................................................................................60
4.1 Tools ...........................................................................................................................................................................60
4.2 Partially Charging in Refrigerant................................................................................................................................60
4.2.1 Calculation Requirements of Chilled Oil and Refrigerant to Be Charged ...............................................................60
4.2.2 Charging Refrigerant Oil .........................................................................................................................................61
4.2.3 Vacuumizing ............................................................................................................................................................63
4.2.4 Partially Charging in Refrigerant.............................................................................................................................64
4.3 Power-on Preparations................................................................................................................................................65
4.4 Powering on the Equipment........................................................................................................................................67
4.5 Commissioning Procedure..........................................................................................................................................68
4.6 Powering off the Equipment.......................................................................................................................................71
5 System Operation and Maintenance.......................................................................................72
5.1 Safety Precautions ......................................................................................................................................................72
5.2 Indoor Unit Maintenance Items..................................................................................................................................72
5.3 Other Cooling System Components............................................................................................................................76
5.4 Alarm Reference.........................................................................................................................................................78
5.5 Troubleshooting..........................................................................................................................................................90
5.5.1 The NetCol5000-A020 Generates Abnormal Voice.................................................................................................90
5.5.2 A Compressor does not Work...................................................................................................................................91
5.5.3 Compressor Generates Excessive Noises ................................................................................................................92
5.5.4 An Indoor Fan Fails to Start.....................................................................................................................................93
5.5.5 Humidification Fails ................................................................................................................................................95
5.5.6 The Heating Function Is Unavailable ......................................................................................................................96
5.5.7 The Water Overflows the NetCol5000-A020...........................................................................................................98
5.5.8 The T/H Sensor Cannot Detect the Humidity and Temperature ..............................................................................98
5.5.9 The LCD does not Light ..........................................................................................................................................99
5.6 Parts Replacement ....................................................................................................................................................100
5.6.1 Replacing Air Filters..............................................................................................................................................100
5.6.2 Replacing an Indoor Fan........................................................................................................................................102
5.6.3 Replacing the Compressor.....................................................................................................................................103
5.6.4 Replacing the Humidifier Cylinder........................................................................................................................107
5.6.5 Electric Heater .......................................................................................................................................................109

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5.6.6 Replacing the Solenoid Coil .................................................................................................................................. 112
5.6.6.1 Replacing the Solenoid Coil on the Liquid Solenoid Valve................................................................................ 113
5.6.6.2 Replacing the Solenoid Coil on the Hot Gas Bypass Valve................................................................................114
5.6.7 Replacing Components in the Electric Control Box.............................................................................................. 114
5.6.8 Replacing the Return Air and Supply Air Temperature Sensor.............................................................................. 116
5.6.9 Replacing an T/H Sensor....................................................................................................................................... 118
5.6.10 Replacing the Power Module...............................................................................................................................119
5.6.11 Replacing the Float ..............................................................................................................................................121
5.6.12 Replacing the LCD ..............................................................................................................................................122
A Acronyms and Abbreviations................................................................................................124
B Laying out the Cooling System..............................................................................................125
C Electrical Ports...........................................................................................................................126
D Electrical Schematic Diagram................................................................................................128
E Schematic Diagram of the Main Control Board .................................................................129
F Schematic Diagram of the Voltage Jumper .........................................................................130
G Control Schematic Diagram of the Humidifier Cylinder................................................131

NetCol5000-A020 Air Cooled In-row Precision Air
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1 Precautions
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1 Precautions
1.1 Safety Precautions
Declaration
Huawei does not take responsibilities for the following situations:
Operation under severe environments which are not specified in this document.
Usage under installation and operating environments which are not specified in related
international specifications.
Unauthorized product changes and software code modification.
Operation ignoring safety precautions and operation guidance specified in this document.
Damage caused by abnormal natural environments.
Overview
To ensure safety of humans and the equipment, pay attention to the safety symbols on the
equipment and all the safety instructions in this document.
The "NOTICE", "CAUTION", "WARNING" and "DANGER" marks in this document
do not represent all the safety instructions. They are only supplements to the safety
instructions.
Local Safety Regulations
When operating Huawei equipment, you must follow the local laws and regulations. The
safety instructions in this document are only supplements to the local laws and regulations.
Personal Requirements
Only trained and qualified personnel are allowed to install, operate, and maintain Huawei
equipment, and they must understand basic safety precautions to avoid hazards.
Only trained and qualified personnel are allowed to install, operate, and maintain Huawei
equipment.
Only personnel certified or authorized by Huawei are allowed to replace or change the
equipment or components (including software).

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Any fault or error that might cause safety problems must be reported immediately to a
supervisor.
Grounding Requirements
Equipment to be grounded must meet the following requirements:
When installing the device, always make the ground connection first and disconnect it at
the end.
Do not damage the ground conductor.
Do not operate the device in the absence of a properly installed ground conductor.
The device must be connected permanently to the protection ground before an operation.
Before operating the device, check the electrical connection of the device to ensure that
it is securely grounded.
Human Safety
This appliance not accessible to the general public.
Before operating a device, wear electrostatic discharge (ESD) clothes, ESD gloves, and
an ESD wrist strap. Remove conductive objects such as jewelry and watches to avoid
electric shocks or burns.
Ensure that tools are insulated.
In the case of fire, immediately leave the building or the equipment room, and turn on
the fire alarm bell or make an emergency call. Do not enter a building that is on fire.
Equipment Safety
The device must be fixed securely on the floor or to other immovable objects such as
walls and mounting racks before operation.
Do not block the ventilation while the device is operating.
Tighten the thumbscrews by using a tool after initial installation and subsequent access
to the panel.
After the installation, remove packing materials from the equipment area.
1.2 Electrical Safety
High Voltage

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The high voltage power supply provides power for the device operation. Direct or indirect
contact (through damp objects) with high voltage and alternating current (AC) mains
supply may result in fatal danger.
Non-standard and improper high voltage operations may result in fire and electric shocks.
High Electrical Leakage
Ground the device before powering it on. Otherwise, personal injury or device damage may
be caused by high leakage current.
If a "high electrical leakage" tag is present on the power terminal of the device, you must
ground the device before powering it on.
Bind the bare parts of power cables with insulation tapes and properly place them.
Power Cable
Do not install or remove power cables when the device is on. Transient contact between the
core of the power cable and the conductor may generate electric arcs or sparks, which may
cause fire or hurt human eyes.
Before installing or removing the power cable, turn off the power switch.
Before connecting a power cable, verify that the label on the power cable is correct.
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent
or similarly qualified persons in order to avoid a hazard.
The appliance should fit with means for disconnection from the supply mains having a
contact separation in all poles that provide full disconnection under overvoltage category
III conditions, and these means must be incorporated in the fixed wiring in accordance
with the wiring rules.
Fuse
To ensure that the system runs safely, if a fuse is to be replaced, the new fuse must be of the
same type and specifications.

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1.3 Mechanical Safety
Drilling Holes
Do not drill the cabinet at will. Drilling holes without complying with the requirements affects
the electromagnetic shielding performance of the cabinet and damages the cables inside the
cabinet. In addition, if the scraps caused by drilling enter the cabinet, the printed circuit
boards (PCBs) may be short circuited.
Drill holes with approval of the customer, contractor, and Huawei.
Before drilling holes on the rack, first remove the cables inside the rack.
To protect your eyes from metal shavings, wear a pair of goggles when drilling holes.
Before drilling holes, wear protective gloves.
After drilling, clean up the metal shavings.
Sharp Objects
Before you hold or carry a device, wear protective gloves to avoid getting injured by sharp
edges of the device.
Handling Fans
When replacing a component, place the component, screws, and tools in a safe place.
Otherwise, if any of them fall into the operating fans, the fans may be damaged.
When replacing a component near fans, do not insert your fingers or boards into the
operating fans until the fans are switched off and stops running.
Moving Heavy Objects
Wear protective gloves when moving heavy objects.
Be careful to prevent injury when moving heavy objects.
To prevent injury, when moving the chassis outwards, be aware of unfixed or heavy
objects on the chassis.
At least two persons are required to move the chassis. When moving the chassis, ensure
that it does not tilt at an angle that exceeds 15 degrees from the vertical direction.

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When moving or lifting the chassis, well protect the chassis to avoid scratches or crashes.
When moving the chassis, do not use a part to support the body. Otherwise, the part may
be damaged.
Welding Hazard
At least two persons are required at the welding site.
The operator must have licenses for welding.
No flammable materials are allowed in the welding area.
Ensure that fire extinguishers, wet cloths, and water containers are prepared.
Do not place a flaming welding torch on parts or the ground. Do not put welding torch
with residual acetylene and oxygen inside a metal container to avoid gas leakage and
burning.
Get the high-temperature pipe cooled down after welding.
Do not perform welding and cutting on a container under pressure. Power off the device
before any welding operation.
1.4 Running Safety
High Temperature and High Pressure
Misoperations may cause over high pressure, which may result in crack and exploration
of the refrigerating system.
High-pressure parts: compressor and exhaust pipe.
High-temperature parts: compressor, exhaust pipe, and electric heater.
Refrigerant Hazard
Wear protective gloves when handling refrigerant to avoid injury from refrigerant
leakage.
Low-temperature part: evaporator.
High-Speed Running
High-speed running part: fan.
Others
Do not block the vents when the system running.
1.5 Others
Binding Signal Cables

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Signal cables must be bound separately from strong electricity cables and high-voltage cables.
Laying Out Power Cables
When the temperature is very low, violent strike or vibration may damage the power cable
sheathing. To ensure safety, comply with the following requirements:
Power cables can be laid or installed only when the temperature is higher than 0°C.
Before laying out power cables which have been stored in a temperature lower than 0°C,
move the power cables to an environment of the ambient temperature and store them at
the ambient temperature for at least 24 hours.
Handle power cables with caution, especially at a low temperature. Do not drop the
power cables directly from the vehicle.
Storage
Ensure that devices are not exposed to direct sunlight or near heat sources.
Keep devices, especially those with high-pressure nitrogen or refrigerant, away from fire
or heat sources to avoid exploration or leakage.
Correct Disposal of This Product
This marking indicates that this product should not be disposed with other housed
wastes throughout the EU. To prevent possible harm to the environment or human health from
uncontrolled waste disposal, recycle it responsibly to promote the sustainable reuse of
material resources. To return your used device, please use the return and collection systems or
contact the retailer where the product was purchased. They can take this product for
environmental safe recycling.
Lost the manual
If you lost this manual, please contact Huawei technical support to get the electronic
document or download it from http://support.huawei.com.

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2 Product Description
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2 Product Description
2.1 Model Description
Figure 2-1 shows the naming rule for the NetCol5000-A series products.
Figure 2-1 Naming rule for the NetCol5000-A
2.2 Composition of an Indoor Unit
Structure
The NetCol5000-A020 is in dimensions (H x W x D) of 2000 mm x 300 mm x 1000 mm in
standard configurations, and 2000 mm x 300 mm x 1200 mm for expansion by adding frames.
Figure 2-2 shows the dimensions of a NetCol5000-A020.

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Figure 2-2 Structure dimensions (unit: mm)
Composition
The NetCol5000-A020 consists of a cabinet, a compressor, EC fans, an evaporator, air filters,
expansion valves, a surge protection and filtering board, an electric heater (optional), and an
electrode humidifier (optional).
Compressor
The high-efficiency scroll compressor is used, which features good environment
adaptability, high reliability, low noise, long service life, and easy installation. The
R410A refrigerant is environmentally friendly.
EC fan
The brand fans are used, featuring less power consumption, high efficiency, high power
coefficient, optimal speed adjustment, and simple control. Compared with common fans,
such fans are highly reliable with redundancy design and save 30% more energy.
Evaporator
The highly efficient finned-pipe evaporator with threaded copper pipes and a zinc-plated
layer adopts the computational fluid dynamics (CFD) to optimize the process design,
which greatly improves the heat exchange efficiency.
Air filter
G3 air filters are used, meeting requirements for equipment room cleanness.
Expansion valve
The external equalizer type thermostatic expansion valve automatically balances the
refrigerant flow, ensuring efficient heat exchange and system reliability.

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Check valve
Check valve are deployed on discharge pipes, preventing return of refrigerant at high
temperature, reducing pipe vibration.
Liquid solenoid valve
Liquid solenoid valves are opened and closed to ensure smooth liquid circulation and
prevent refrigerant migration or even liquid strike.
Air bypass solenoid valve
The air bypass solenoid valve bypasses part refrigerant out of the compressor to the inlet
of the evaporator to reduce refrigerant capacity and prevent frequent startup and
shutdown of the compressor.
Surge protection and filtering board
The surge protection and filtering board is used for surge protection and equipment
voltage detection, enhancing equipment security.
Electric heater
The PTC heater implements quick startup, large heating capacity, even heat dissipation,
and automatic heat capacity adjustment, providing multiple protection mechanisms.
Electrode humidifier
The electrode humidifier provides stepless adjustment of humidification capacity and
precise control of humidity in equipment room.
Controller
The 7-inch true color-sensitive LCD offers a user-friendly interface for you to perform
query, settings, monitoring, and maintenance.
2.3 Monitoring function
2.3.1 Controller
Appearance
The 7-inch true color-sensitive LCD offers a user-friendly interface for you to perform query,
settings, monitoring, and maintenance.
Figure 2-3 shows an LCD.

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Figure 2-3 Appearance
(1) Indicator
(2) LCD
Functions
If only one air conditioner is used, the controller provides logic control of components in
the air conditioner to meet temperature and humidity requirements.
By integrating a compressor frequency-converting drive, the controller adjusts the
frequency of the DC frequency-converting compressor to adapt to load changes and
enables you to query the settings and status of the compressor.
The LCD on the controller allows you to set the parameters for the air conditioner and
query its status.
If multiple air conditioners are used, the controller optimally distributes the heat load to
reduce power consumption and provides backup to improve reliability.
Features
The controller provides a touchscreen with a user-friendly interface.
The controller controls the air conditioner precisely and responds quickly.
The multi-level password protection prevents misoperations.
The controller protects the air conditioner against overvoltage, undervoltage, abnormal
power failure, and water leaks, which ensures air conditioner reliability.
The LCD on the controller displays the operating status and duration of the air
conditioner components in real time.
The fault diagnosis system automatically displays the information of the current fault,
which facilitates the maintenance.
The air conditioner provides abundant external ports such as RS232 ports, RS485 ports,
fast Ethernet (FE) ports, and USB ports that are protected by a security mechanism.
2.3.2 Monitoring System
The monitoring system provides logic control, data collection, control delivering, alarm
reporting, data storage, user right management, and group control. The air conditioner can be
connected to the monitoring system over a northbound port (RS485 or RS232) for remote
management.

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The monitoring system implements monitoring on the equipment by communicating
with the equipment over the RS485 port.
A maximum of 32 air conditioners can be connected in group control mode. You can
assign any air conditioner to be the master and connect the master to the monitoring
network diagram.
Figure 2-4 shows the monitoring network diagram.
Figure 2-4 Networking diagram
2.4 Application Environment
Table 2-1 lists the environmental specifications, Table 2-2 lists the physical ports,Table 2-3
lists the installation requirements, Table 2-2 lists the water quality requirements.
Table 2-1 Environmental specifications
Item
Specifications
Operating temperature
18–45°C
Operating humidity
20%–80% RH
Storage temperature
–40°C to +70°C
Storage humidity
5%–95% RH (non-condensing)
Altitude
0–1000 m, when the altitude is greater than 1000 m, the cooling
performance is derated.a
Protection level
Indoor unit: IP20
Outdoor unit: IPX5
a: For the detailed derated data, contact Huawei.

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Table 2-2 Physical ports
Item
Specifications
Refrigerant liquid pipe
Copper pipe, with an outer diameter of 0.5 inches and thickness
of 0.75 mm, withstanding a pressure not smaller than 4.5 MPa,
welding.
Refrigerant gas pipe
Copper pipe, with an outer diameter of 0.625 inches and
thickness of 1.0 mm, withstanding a pressure not smaller than
4.5 MPa, welding.
Water injection pipe to
the humidifier
Reserved interface: BSPP 0.75-inch thread connection.
Condensate drainpipe
Reserved interface: copper pipe, with an outer diameter of 0.75
inches.
Installation mode
Installed on an electrostatic discharge (ESD) floor.
Pipe and cable routing
The cabinet supports overhead and underfloor cabling.
Table 2-3 Installation requirements
Item
Specifications
Door
Width: not smaller than 0.9 m; height: not smaller than 2.3 m.
Floor
Bearing capacity not smaller than 350 kg/m2; for raised floors,
height not smaller than 250 mm.
Length of one-way
refrigerant pipes
≤ 25 m
Height difference
between the indoor and
outdoor units
If the outdoor unit is placed higher than the indoor unit, the
maximum vertical distance between them is 10 m.
If the indoor unit is placed higher than the outdoor unit, the
maximum vertical distance between them is 5 m.
Thickness of the thermal
insulation foam
≥ 13 mm
Water supply
Water supply pressure range: 0.1–0.7 MPa.
Water supply temperature range: 1–40°C.
Transient water flow ≥ 0.6 L/min.
Water quality must meet requirements specified in Table
2-4.
Drainage
Drainpipes can withstand high temperature (≥ 100°C, for units
that are configured with a humidifier).
Power supply
Ground fault circuit interrupters are not recommended to be
used on main circuit. If ground fault circuit interrupters are
required by the customer or according to local regulations, use
the residual current circuit breaker that is not sensitive to the

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Item
Specifications
single-phase DC pulse and transient current pulse.
Note: If some conditions are not met, please contact Huawei technical support.
Table 2-4 Water quality requirements
Item
Requirement
Unit
Hydrogen ion
7–8.5
PH
Conductivity at 20°C
(σ20)
300–1250
μS/cm
Total dissolved solids
0.93 x σ20
mg/l
Dry residue at180°C
0.65 x σ20
mg/l
Total hardness
100–400
mg/l (CaCO3)
Temporary hardness
60–300
mg/l (CaCO3)
Iron+manganese
0–0.2
mg/l (Fe+Mn)
Chloridum
0–30
ppm (Cl)
Anhydrous silicate
0–20
mg/l (SiO2)
Residual chlorinum
0–0.2
mg/l (Cl)
Calcium sulfate
0–100
mg/l (CaSO4)
Metal matter
0
mg/l
Solvent, thinner, soap,
and lubricant
0
mg/l
Visible impurities
None
N/A
2.5 Technical Specifications
Table 2-5 and Table 2-6 show the universal and optional parameters.
Table 2-5 Universal parameters
Item
Specifications
Cooling mode
Air cooled
Refrigerant
R410A
Air supply mode
Horizontal flow