Envicool EMW90HDNC1U User manual

EMW90HDNC1U Air-cooled Chiller
EMW90HDNC1U 风冷式冷水机组
User Manual
用户手册
深圳市英维克科技股份有限公司
Shenzhen Envicool Technology Co., Ltd.

User Manual
用户手册
EMW90HDNC1U Air-cooled Chiller
1
1
EMW90HDNC1U
User Manual
用户手册
About This Document................................2
Contents....................................................3
1 Safety Precautions.................................4
2 Product Description................................6
3 Installation Guide .................................11
4 Controller .............................................16
5 Coolant Filling and Replenishment.......25
6 Routine Maintenance ...........................27
7 Fault Management ...............................31
8 Reference ............................................44
前言 ........................................................ 45
目录 ........................................................ 46
1 安全注意事项 ...................................... 47
2 产品描述 ............................................. 49
3 安装指南 ............................................. 53
4 控制器................................................. 58
5 系统注液和补液 .................................. 66
6 例行维护 ............................................. 68
7 故障管理 ............................................. 71
8 参考 .................................................... 80

User Manual
About This Document
2
EMW90HDNC1U Air-cooled Chiller
About This Document
Purpose
This document mainly introduces the product overview, installation, controller
operation, routine maintenance and troubleshooting of EMW90HDNC1U air cooled
chiller, which is convenient for readers to master the use and maintenance of air
cooled chiller.
Intended Audience
This document is mainly applicable to the following readers:
Product installation engineer
Technical support engineer
After-sales maintenance engineer
Symbol Conventions
The following signs may appear in the text, with the following meanings.
Symbol Description
Warns of a critically hazardous situation, which may result
in death or serious personal injury if the requirements are
not followed.
Warns of a potentially dangerous situation, which may
result in moderate or minor personal injury if the
requirements are not followed.
Warn of scenarios that affect equipment safety or
environmental safety. Failure to comply with the
requirements may cause damage to equipment or other
adverse results.
Prompts for some general details, or other useful
information to simplify the work.
Change History
Changes between document issues are cumulative. The latest document issue
contains all the changes made in earlier issues.
Version Update Modified Date
A2
Updated the product appearance diagram, and
some descriptions and installation steps have
been optimized.
2022-11-29
A1 Initial release. 2022-10-17

User Manual
Contents
EMW90HDNC1U Air-cooled Chiller
3
3
Contents
About This Document............................. 2
1 Safety Precautions............................... 4
2 Product Description............................. 6
2.1 Feature .......................................................... 6
2.1.1 Product Introduction ................................... 6
2.1.2 Function Description .................................. 7
2.2 Implement...................................................... 8
2.2.1 System Principle......................................... 8
2.2.2 Control Logic .............................................. 8
2.2.3 Operating Mode.......................................... 9
2.3 Specifications .............................................. 10
3 Installation Guide............................... 11
3.1 Installation Instructions................................ 11
3.1.1 Transportation and Handling.................... 11
3.1.2 Physical Dimension.................................. 11
3.1.3 Installation Environment........................... 12
3.1.4 Installation Layout .................................... 12
3.2 Preparation Before Installation.................... 12
3.2.1 Unpacking and Inspection........................ 12
3.2.2 Tools Preparation..................................... 13
3.3 Mechanical Installation................................ 13
3.4 Electrical Connection................................... 14
4 Controller............................................ 16
4.1 Introduction.................................................. 16
4.2 Control System Interface
............................. 16
4.3 System Start-up and Shutdown .................. 18
4.4 Set the Operation Mode .............................. 19
4.5 Status .......................................................... 19
4.6 Record ......................................................... 19
4.7 Graphic.........................................................20
4.8 Alarm............................................................20
4.9 Settings ........................................................21
4.10 Maintain......................................................24
4.11 More ...........................................................24
5 Coolant Filling and Replenishment .. 25
6 Routine Maintenance......................... 27
6.1 Overview ......................................................27
6.2 Chiller Appearance Maintenance.................27
6.3 Fans Maintenance .......................................27
6.4 Maintenance of Power Cables and Power
Terminals ...........................................................28
6.5 Condenser Maintenance..............................29
6.6 Coolant Maintenance...................................29
7 Fault Management ............................. 31
7.1 Fault of External Circulation Fan .................31
7.2 Fault of Refrigeration System ......................31
7.3 Fault of Coolant Circulation System ............32
7.4 Parts Replacement ......................................33
7.4.1 Parts Description.......................................33
7.4.2 Replacing the External Circulation Fan ....34
7.4.3 Replacing the Compressor .......................34
7.4.4 Replacing the Electrical Heater and
Circulation Pump................................................34
7.4.5 Replacing the Electrical Components.......34
7.5 Alarm Handling ............................................35
8 Reference............................................ 44
8.1 Barcode........................................................44
8.2 Coolant Specifications .................................44

User Manual
1 Safety Precautions
4
EMW90HDNC1U Air-cooled Chiller
1 Safety Precautions
Please read this chapter carefully before carrying
out assembly, installation, electrical engineering
and maintenance operations, and strictly abide by
relevant requirements and operate carefully when
performing relevant operations.
Declaration
Envicool does not take responsibilities for the
following situations:
Operate the device in abnormal conditions or
environments that do not meet the application
scenarios described in this manual.
Failure to comply with the operating
requirements of this manual, equipment failure
due to improper use, or incorrect installation
and maintenance methods.
Failures not caused by this equipment (such as
failures caused by the customer's equipment,
software, etc.).
Device damage caused by yourself
replacement or disassembly of product parts,
or device damage caused by unauthorized
maintenance service personnel.
Device damage caused by force majeure such
as fire, earthquake, flood, etc.
General Safety
Any personal injury caused by misoperation
should be dealt with immediately, and first aid
or medical care must be obtained immediately.
Please strictly abide by the local safety
regulations and laws and regulations to avoid
accidents. The safety precautions in the
manual do not represent all the safety
precautions that should be followed, but only
serve as a supplement to local safety
regulations.
If there are warning labels attached to the
device, please read them carefully and strictly
observe them before operation.
Only original parts and parts authorized by the
manufacturer to ensure the stability and safety
of air conditioner device are allowed to be
used. If other parts are used, the warranty right
will be invalid.
It is not allowed to make any changes to air
conditioner devices without the agreement and
consent of the manufacturer.
Children and personnel with limited cognitive
and coordination ability are not allowed to
operate, maintain, clean the device or use it as
a toy.
Please entrust professionals for installation,
electrical engineering and maintenance.
Self-installation may lead to accidents such as
water leakage, electric shock or fire.
Professionals refer to those who have professional
training, experience and skills, and are familiar with
regulations, rules and measures related to accident
prevention and operation requirements, and have the
ability to discover and avoid all potential hazards. The
operator or the person in charge authorizes this person
to ensure the safety of the equipment and carry out all
necessary operations.
Electrical Safety
It is forbidden to install or remove the power
cord when powered on. Please turn off the
power switch before installing or removing the
power cord.
When installing the device, always make the
ground connection first and disconnect it at the
end. Do not power on the device in the
absence of a properly installed ground
conductor.
Please perform installation and maintenance
operations after the power is off, and do not
turn on the power during the air conditioner
device is running. For some operations that
need to be performed during running (such as
measuring current, pressure, temperature,
etc.), you must ensure that the device wiring
has been completed correctly before the
power can be turned on, and the power should
be cut off immediately after the operation is
completed.
The capacitors contained in the air conditioner will
continue to discharge after the power is cut off. To
ensure personal safety, please wait at least 10 minutes
after the unit is powered off before performing
maintenance operations.

User Manual
1 Safety Precautions
EMW90HDNC1U Air-cooled Chiller
5
Les condensateurs contenus dans le climatiseur
continueront à se décharger après la coupure de
l'alimentation. Pour garantir la sécurité des personnes,
veuillez attendre au moins 10 minutes après la mise
hors tension de l'appareil avant d'effectuer des
opérations de maintenance.
Protective measures must be taken during
electrical maintenance, such as wearing
insulating gloves or insulating shoes.
Operational Safety
When the chiller is running, please do not touch
the internal components of the chiller with your
hands at will to avoid electric shock or injury by
the fan blades of the fan.
If severe vibration or abnormal sound occurs
during running or debugging of the chiller,
please stop all operations and immediately cut
off the circuit switch for inspection.
All circuit switches should be disconnected
during inspection and maintenance, and
guards should be set up to prevent others from
closing the circuit switches by mistake.
Only when all the circuit switches are turned off
and the internal control board no longer
flashes the signal light, can you operate the
device circuit and electronic devices, and you
must wear anti-static gloves.
Do not allow liquids such as water to enter the
terminal area of the device during installation
and maintenance.
It is forbidden to carry heavy device by hand
alone. Please wear protective gloves when
carrying light device by hand.
Please wear protective gloves when there are
sharp objects (such as fins, etc.) in the
operating parts.
Be careful when cutting the cable tie to avoid
cutting the cable.
Application Safety
Do not use this product in a flammable and
explosive environment.
Please be cautious when professional
maintenance is involved. For details, please
consult the customer service center of the
product manufacturer.
Recycling
It is strictly forbidden to dispose of this
product as unsorted municipal waste, please sort
it and recycle it. The disposal of scrap must
comply with relevant requirements and adopt
special methods for independent treatment to
avoid potential pollution to the environment
.

User Manual
2 Product Description
6
EMW90HDNC1U Air-cooled Chiller
2 Product Description
2.1 Feature
2.1.1 Product Introduction
Product Appearance
The appearance of EMW90HDNC1U chiller is shown in Figure 2-1.
Figure 2-1 Product appearance
1: Top air baffle 2: Coolant inlet 3: Coolant outlet 4: Side fixing plate
5: Air inlet 6: Pull ring 7: Grounding nut
8: Coolant filling /
drain port
9: User wiring terminal 10: Bottom air baffle 11: Air outlet 12: Bottom fixing plate
Figure 2-1 shows the chiller appearance after installing the air baffles and fixing plates. When installing the chiller, please
obtain the air baffles and fixing plates from the delivered fittings.
Model Description
The naming rules of EMW series air-cooled chiller
are shown in Table 2-1.
Table 2-1 Naming rules
EMW
90
H
D
N
C
1
U
1 2 3 4 5 6 7 8
1 Product series
EMW: air-cooled chiller
series
2 Rated cooling
capacity 90: 9kW
3 Basic function H: with heating
4 Installation
method D: Insert in a frame
5 Application
environment
N: normal temperature
6 Noise level C: common noise
7 Input Power
supply
1: 220VAC 50/60Hz
8 Version code U

User Manual
2 Product Description
EMW90HDNC1U Air-cooled Chiller
7
Feature Description
EMW series air-cooled chillers are all-in-one
products developed mainly for heat dissipation in
the energy storage (such as battery) industry. The
applicable scenarios are as follows:
The battery in the energy storage container
generates a large amount of heat.
The equipment in the energy storage container
is sensitive to the ambient temperature.
EMW series air-cooled chillers mainly have the
following characteristics:
Table 2-2 EMW series air-cooled chiller features
Feature Description
Advanced
design
It adopts an integrated
structure, all parts are
encapsulated in a chassis,
which is convenient for
installation and maintenance.
It adopts modular design and
compact appearance.
Complete
functions
It supports smart refrigeration
and heating functions.
It supports RS485 and CAN
communication function.
It supports power-off memory
and self-start function.
Safe and
reliable
The coolant cooling method has
small temperature difference
and fast cooling, which can
effectively extend the battery
life and delay the attenuation.
It supports 24 hours * 365 days
continuous operation.
Energy
efficient
The high-efficiency controller is
used to control the cooling
output on demand to achieve
the best cooling and lowest
energy consumption.
Equipped with frequency
conversion compressor and
frequency conversion water
pump to realize double
frequency conversion
adjustment of cooling system
and coolant circulation system.
2.1.2 Function Description
Smart Refrigeration / Heating
The EMW90HDNC1U chiller is equipped with
high-efficiency controller, and supports a field
communicator to visually set control parameters,
which is easy to operate.
The controller monitors the coolant outlet
temperature (the control temperature type is
configurable) in real time, and intelligently adjusts
it according to the target temperature setting, so
that the battery operating temperature in the
container is stabilized within an appropriate
range.
When the coolant outlet temperature is higher
than the refrigeration set point and the
refrigeration start condition is met at the same
time, the chiller starts cooling and chooses to
output different refrigeration capacity
according to the actual temperature.
When the coolant outlet temperature is lower
than the refrigeration set point, the chiller
saves energy by turning off the compressor
and reducing the speed of the circulating
pump.
When the coolant outlet temperature is lower
than the heating set point and the heating start
condition is met at the same time, the chiller
will start electric heater.
RS485 / CAN Communication
The EMW90HDNC1U chillers communicate with
the host computer through the RS485 or CAN
(Controller Area Network) interface using Modbus
or CAN protocol. By sending request messages,
the host computer can perform operations such
as remote start-up and shutdown, query the
operating status of the chiller and set control
parameters to realize remote monitoring of the
chiller.
Power-off Memory and Self-start
After the chiller is powered off, it can memorize
the settings before power off, and it can
automatically and intelligently run according to
the memorized settings after the power is turned
on again.

User Manual
2 Product Description
8
EMW90HDNC1U Air-cooled Chiller
2.2 Implement
2.2.1 System Principle
The EMW series chiller is composed of a
refrigeration cycle system and a coolant cycle
system, and the system principle is shown in
Figure 2-2.
Figure 2-2 System principle
1
2
3
4
5
7
6
From the load side
To the load side
1: Compressor 2: Condenser
3: Condenser fan 4: Throttle element
5: Plate heat
exchanger
6: Circulation pump
7: Electrical heater
The working process of EMW series air-cooled
chillers is as follows:
1. When the outlet coolant temperature reaches
the refrigeration opening point, the
compressor starts to compress the gaseous
refrigerant.
The chiller supports the execution of
temperature control logic based on the outlet
coolant temperature and the cell temperature
sent by the host computer.
2. The condenser condenses the
high-temperature refrigerant, and the
refrigerant changes from a gaseous state to
a liquid state.
3. The fan sucks in the outside air and
discharges the heat released when the
refrigerant condenses to the surrounding air.
4. The throttling element (electronic expansion
valve) throttles and depressurizes the
condensed refrigerant.
5. The refrigerant enters the plate heat
exchanger to evaporate and absorb the heat
of the coolant flowing through the plate heat
exchanger.
6. The circulating pump continuously transports
the coolant to the plate heat exchanger,
exchanges heat with the refrigerant, and
transports the cooled coolant to the container
to cool the battery pack.
2.2.2 Control Logic
The control logic of EMW90HDNC1U chiller is shown in Table 2-3.
Table 2-3 Control logic
Item Control Logic Description
Refrigeration
Refrigeration demand ≥
50%: the refrigeration is
started.
Refrigeration demand (%)= (actual control
temperature - refrigeration set point) /
refrigeration sensitivity * 100%
When the refrigeration set point is 15°C and the
refrigeration sensitivity is 3°C, the refrigeration
start point is 16.5°C (15°C +3°C* 100% =16.5°C),
and the refrigeration stop point is 13.5°C (15°C
-3°C*50%=13.5°C).
When the outlet coolant temperature is used as
the actual control temperature:
When the outlet coolant temperature is ≥
16.5°C, the chiller will start cooling.
When the outlet coolant temperature is ≤
13.5°C
, the chiller stops cooling.
Refrigeration demand ≤
-50%: the refrigeration is
stopped.

User Manual
2 Product Description
EMW90HDNC1U Air-cooled Chiller
9
Item Control Logic Description
Heating
Heating demand ≥50%: the
heating is started.
Heating demand (%)= (heating set point - actual
control temperature) / heating sensitivity * 100%
When the heating set point is 10°C and the
heating sensitivity is 3°C, the heating start point is
8.5°C (10°C- 3°C*50%=8.5°C), and the heating
stop point is 11.5°C (10°C+ 3°C *50%=11.5°C).
When the outlet coolant temperature is used as
the actual control temperature:
When the outlet coolant temperature is ≤8.5°C,
the chiller will turn on the electrical heaters.
When the outlet coolant temperature is
≥11.5°C, the chiller will stop the electrical
heaters.
Heating demand ≤-50%, the
heating is stopped.
The actual control temperature is configurable and supports the coolant outlet temperature and the cell temperature
sent by the host computer.
Refrigeration/heating set point and refrigeration/heating sensitivity can be configured according to actual planning.
2.2.3 Operating Mode
The chiller supports the operating modes shown in Table 2-4.
Table 2-4 Operating mode
Operating Mode Description
Stop
When the chiller is working in the Stop mode, except for the electronic control
part to keep running, other parts such as the internal circulating pump are not
running.
Cycle When the chiller is in the Cycle mode, only the circulation pump runs, and the
pump runs at a low speed, and other devices are not running.
Cool
When there is a refrigeration demand, the refrigeration function is turned on,
and the internal circulating pump, compressor and fans are all running, and
the pump runs at a high speed.
When there is no refrigeration demand, the compressor is turned off, the
fans stop running, and the internal circulating pump runs at low speed.
When there is heating demand, only the internal circulating pump is turned
on. The pump is running at low speed, and other components such as
electrical heater is not running.
Heat
When there is a heating demand, the heating function is turned on, the
internal circulating water pump and the electrical heater run, and the water
pump runs at a high speed.
When there is no heating demand, the electrical heater is turned off and the
internal circulating water pump runs at low speed.
When there is a cooling demand, only the internal circulating pump is turned
on. The pump is running at low speed, and other components such as the
compressor are not running.

User Manual
2 Product Description
10
EMW90HDNC1U Air-cooled Chiller
Operating Mode Description
Auto In the
Auto
mode, the chiller automatically enters the
Cycle
,
Cool
and
Heat
modes according to actual needs.
2.3 Specifications
Parameter Specifications
The parameter specifications of the
EMW90HDNC1U chiller are shown in Table 2-5.
Table 2-5 Parameter specifications
Parameter Specification
Operating
voltage range 220V±10% 50/60Hz
Operating
environment
temperature
range
-30°C - +55°C
Operating
relative
humidity range
5% - 95%
Storage
environment
temperature
range
-40°C - +70°C
Storage
environment
relative
humidity range
5% - 95%
Transport
performance
Adapt to land, air and sea
transportation, etc.
Working
altitude
0m - 4000m
The performance will be
reduced by 5% for every
1000m increase when the
altitude is 2000m~ 4000m.
Unit size
(W×D×H) 275mm×1150mm×1040mm
Max. coolant
flow 50L/min
Outlet coolant
temperature
range
10°C~35°C (Conventional
application scenarios)
Inlet coolant
temperature
range
12°C~37°C (Conventional
application scenarios)
Some technical parameters marked on the equipment
nameplate will not be repeated here.
Refer to Table 4-2 for the refrigeration and heating
setting range. The outlet/inlet coolant temperature
range listed in the above table is the value of the
chiller's conventional application scenario.
Coolant
50% ethylene glycol aqueous solution
Followed Standards
Table 2-6 Standards for Products
Standard Description
UL1995 Heating and Cooling
Equipment
IEC 60335-1
Household and similar
electrical
appliances-Safety-Part 1:
General requirements.
IEC 60335-2-40
Household and similar
electrical
appliances-Safety-Part 2-40:
Particular requirements
electrical heat pumps,
air-conditioners and
dehumidifiers.
IEC 61000-6-4
Electromagnetic
compatibility (EMC) - Part
6-4: Generic standards.
IEC
61000-4-2/3/4/5/
6/8
Electromagnetic
compatibility (EMC) - Part 4:
Testing and measurement
techniques.
GB/T 18430.2
Water chilling (heat pump)
packages using the vapor
compression cycle - Part 2:
Water chilling (heat pump)
packages for household and
similar application

User Manual
3 Installation Guide
EMW90HDNC1U Air-cooled Chiller
11
3 Installation Guide
3.1 Installation
Instructions
In order to achieve the design performance of
chillers and maximize their service life, please
reserve space for installation and maintenance
with reference to the suggestions provided by
manufacturers, and strictly install equipment
drawings for installation.
3.1.1 Transportation and
Handling
During transportation and handling, please
ensure that the outer packaging is complete,
avoid moisture or damage to the outer
packaging, and ensure that the chiller is
protected from collision, rain and chemical
corrosion.
Please keep the chiller upright during
transportation and handling, and it is strictly
forbidden to lie on its side or turn it upside
down.
When handling the bare machine of the chiller, it
is forbidden to use the coolant inlet and outlet
interfaces as the force-bearing support.
3.1.2 Physical Dimension
The dimension of the EMW90HDNC1U chiller is shown in Figure 3-1.
Figure 3-1 Physical dimension
1150
1040
275
70
58.5
87.5
59
130
138.5
59
196
273
23
198.6
38.2
18
14636
25
Ø6
391.5

User Manual
3 Installation Guide
12
EMW90HDNC1U Air-cooled Chiller
3.1.3 Installation Environment
Please carry out necessary leakage protection and
pre-discharge treatment according to local environmental
protection requirements, and direct discharge of coolant is
not allowed.
Veuillez effectuer la protection nécessaire contre les fuites
et le traitement préalable àla décharge conformément
aux exigences locales de protection de l'environnement,
et la décharge directe du liquide de refroidissement n'est
pas autorisée.
The requirements for the installation environment
of the chiller are as follows:
It has a good air circulation space to prevent the
hot air discharged from the chiller from flowing
back to the air inlet of the unit through the
container gap.
Ensure the cleanliness of the air at the air inlet
of the chiller, and prevent impurities such as
dust and grit from entering the chiller.
Try to choose a spacious area as the installation
site for the chiller, and avoid installing or
placing any equipment at the air inlet and air
outlet.
When the chiller works in a narrow space, it
will affect the airflow structure of the air,
resulting in short circuit of the air inlet, air
outlet and air noise, which will eventually affect
the normal operation of the chiller.
Avoid installing multiple chillers back-to-back
with each other.
The back-to-back arrangement of multiple
chillers will cause the outdoor inlet air and
outlet air flows between different units to cross,
which will affect the cooling capacity of the
chillers.
Avoid installing additional devices on the chiller.
Installing additional devices may hinder the
daily maintenance of the chiller.
3.1.4 Installation Layout
The chiller is installed on the bracket on the
customer side by inserting a frame. The customer
needs to refer to the chiller size in Figure 3-1 to
prefabricate the installation bracket, and reserve
installation holes on the bracket (including the
hinge fixing holes on both sides of the chiller, and
the bottom the hinge fixing holes).
Please refer to the requirements in Table 3-1 for
installation to ensure the normal operation of the
chiller.
Table 3-1 Installation layout
Item Requirements
Air inlet
and outlet
It is recommended that at least
1000mm in front of the air inlet
and outlet should not be blocked
by obstacles.
The area of the air inlet
reserved for the chiller on the
container door cannot be
smaller than the area of the air
inlet hole on the chiller.
Pipe
layout
Flexible joints should be used
for connecting pipelines to avoid
the vibration generated by the
chiller from being transmitted to
the pipeline system.
An air discharge valve should
be installed at the highest point
of the connecting pipe.
3.2 Preparation Before
Installation
3.2.1 Unpacking and
Inspection
Please try to move the chiller to the place closest
to the installation location before unpacking and
disassembling, so as to facilitate the movement of
the chiller. At the same time, ensure that the
chiller is placed upright, and it is not allowed to lay
flat or lie on its side.
Please avoid scratching the surface of the unit
during operation. If the product is not installed
immediately, or the product needs to be
transferred to other regions, please repackage
the chiller after the unpacking inspection is
completed.
Please do the following checks after unpacking:
Please carefully check whether the chiller is
damaged due to transportation, and pay
particular attention to whether there are loose
parts, pits, scratches, and oil leakage. If any

User Manual
3 Installation Guide
EMW90HDNC1U Air-cooled Chiller
13
damage is found, please report it to the seller
with the barcode number on the outside of the
package within one week.
Please count the number of units and
installation accessories according to the list of
accessories.
Before disposing of the packaging materials,
please make sure that there are no loose parts
in the packaging materials. In order to protect
the environment, it is recommended to recycle
the packaging boxes.
3.2.2 Tools Preparation
Before installation and maintenance, please
prepare not limited to the commonly used tools
listed in Table 3-2. On-site technicians can
increase or decrease them according to the
actual situation.
Table 3-2 Commonly used tools
Tool Icon Function
Flat-blade
screwdriv
er
(2mm×75
mm)
A flat-blade screwdriver
installs or removes the
connecting wires of the
controller, etc.
Phillips
screwdriv
er
(M3/M4/M
5/M6)
Phillips screwdriver is
used to install or
remove screws for other
parts. Recommended
tightening torques are
as follows:
M3: 0.5N.m, M4:
1.2N.m, M5: 2.7N.m,
M6: 4.2N.m
Torque
wrench
(Setting
value:
5~25N.m,
scale:
0.25N.m)
Used for disassembly
and assembly of screws
and pipeline
connection, etc.
Tightening torque of
screws: 13N.m (M8)
Tightening torque of
chuck connection:
10N.m
Diagonal
pliers
Process the cables and
remove the cable ties
on site.
Crimping
pliers
On-site processing of
cables and crimping of
various terminals.
Tool Icon Function
Condense
r special
cleaning
water gun
Clean the condenser of
the air conditioning
system.
Brush Clean up dust.
Clamp
ammeter
Check the working
voltage and current on
site.
Check the internal
power distribution
voltage and current.
Fin comb
Corrects bent and
deformed fins.
3.3 Mechanical Installation
Prerequisites
The installation location of the chiller has been
reasonably planned by referring to 3.1.2
Physical Dimension, 3.1.3 Installation
Environment and 3.1.4 Installation Layout.
The packaging of the chiller has been
disassembled, and the installation tools and
accessories listed in the packing list are ready.
The coolant pipelines (diameter: DN28, pipeline
pressure ≥3.5bar) have been prepared.
Precautions
The pull ring on the front of the chiller is only used for
pulling the maintenance panel. It is forbidden to use it
as a force support to move the chiller upwards.
To avoid condensation, use insulated and thermal
insulated pipes for connection.
The coolant inlet and outlet of the chiller adopts quick
connectors, and the specifications of the connecting
pipes must conform to the specifications of the coolant
inlet and outlet ports.
It is suggested to install stop valves between the inlet
and outlet connecting pipes of the chiller and the
equipment to be cooled, so as to maintain the chiller or
the equipment to be cooled later.

User Manual
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EMW90HDNC1U Air-cooled Chiller
L'anneau de traction situé à l'avant du refroidisseur est
uniquement utilisé pour tirer le panneau d'entretien. Il
est interdit de l'utiliser comme support de force pour
déplacer le refroidisseur vers le haut.
Pour éviter la condensation, utilisez des tuyaux isolés et
thermiquement isolés pour le raccordement.
L'entrée et la sortie du liquide de refroidissement du
refroidisseur adoptent des connecteurs rapides, et les
spécifications des tuyaux de connexion doivent être
conformes aux spécifications des ports d'entrée et de
sortie du liquide de refroidissement.
Il est recommandé d'installer une vanne d'arrêt entre les
conduites d'entrée et de sortie du refroidisseur et de
l'équipement à refroidir pour la maintenance ultérieur
du refroidisseur ou de l'équipement à refroidir.
Procedure
Step 1 Use a forklift and other equipment to
transport the chiller to the planned
installation area.
Step 2 Remove the set bolts (4-M8) of the lifting
ring mounting hole on the top of the
chiller.
Step 3 Install the lifting eyebolts (4-M8) of the
lifting equipment to the corresponding
mounting holes.
Step 4 Use lifting equipment to slowly put the
chiller into the installation area (such as
the cabinet) for a certain distance to
ensure that the chiller can stand stably on
the fixed support.
Step 5 Remove the lifting eyebolts and reinstall
the set bolts.
Step 6 Refer to Figure 2-1 to fix the fixing plates
and air baffles on the chiller.
Step 7 Adjust the chiller to the planned installation
position.
Step 8 Use a Phillips screwdriver and M6
combination screw to fix the chiller with
the mounting bracket on the customer’s
side.
Step 9 Connect the coolant inlet and outlet pipes
of the chiller according to the screen
printing.
1. Connect the coolant outlet of chiller
with the coolant inlet of the equipment
to be cooled.
2. Connect the coolant inlet of chiller with
the coolant outlet of the equipment to
be cooled.
3.4 Electrical Connection
Prerequisites
Mechanical installation has been completed.
Precautions
Electrical connections must be operated by trained
professionals.
When connecting the power cord, live operation is
prohibited.
The chiller has a built-in 32A circuit breaker with a
maximum operating current of 25A. It is recommended
to install a 40A circuit breaker on the distribution side
to ensure operational safety and facilitate subsequent
maintenance of the chiller.
In order to avoid any destructive influence, the chiller
must be grounded reliably before turning on the power
supply.
All electrical connections must meet the requirements of
national and local electrical codes.
Les connexions électriques doivent être effectuées par
les professionnels qualifiés.
Lors du branchement du cordon d'alimentation, le
fonctionnement sous tension est interdit.
Le refroidisseur est équipé d'un disjoncteur intégré de
32A avec le courant de fonctionnement maximal de
25A. Il est recommandé d'installer un disjoncteur de
40A sur le côté de la distribution pour assurer la
sécurité opérationnelle et faciliter la maintenance
ultérieure du refroidisseur.
Afin d'éviter toute influence destructrice, le refroidisseur
doit être mis à la terre de manière fiable avant la mise
sous tension.
Toutes les connexions électriques doivent être
conformes aux codes électriques nationaux et locaux.
Background
The user wiring interface of EMW90HDNC1U
chiller adopts fool-proof design, please refer to
Table 3-3 for details of the interface.

User Manual
3 Installation Guide
EMW90HDNC1U Air-cooled Chiller
15
Figure 3-2 User wiring interface
1
2
3
1: Circuit breaker 2: Ground nut
3: Electrical interface
Table 3-3 Definition of electrical interface pins
Type Pin Definition Description
Ground
See
Figure
3-2
mark
2
PE -
POWER
A
Single-pha
se power
supply L
Input power
interface of
the chiller.
B
Single-pha
se power
supply N
PUMP
C
Single-pha
se power
supply L Power
interface of
the coolant
filling pump.
D
Single-pha
se power
supply N
DEBUG
E 12V+ Field
communicat
or
communicati
on interface.
F GND
G D3+
H D3-
Type Pin Definition Description
COM
A CAN+
CAN
communicati
on interface.
B CAN-
C RS485+ RS485
communicati
on interface.
D RS485-
The pins not listed in the DEBUG interface and COM
interface are reserved.
Procedure
Step 1 Confirm that the chiller has been
disconnected.
Step 2 Refer to Table 3-3 to connect and tighten
the power cord and communication cord.
Step 3 Turn on the circuit breaker of the chiller.
Remove the cover on the circuit breaker
(see mark 1in Figure 3-2), turn on the
circuit breaker and install the cover back.

User Manual
4 Controller
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EMW90HDNC1U Air-cooled Chiller
4 Controller
4.1 Introduction
The chiller supports the connection of a field
communicator (see Table 3-3 for wiring) to
provide users with a human-machine interface.
Users can query, set up and monitor conveniently
through the touch screen to ensure the normal
operation of the chiller.
4.2 Control System
Interface
Turn on the power switch to power on the chiller,
the system is initialized, as shown in Figure 4-1.
Figure 4-1 System initialization interface
After the control system is initialized for about 10
seconds, it will enter the homepage interface of
the control system, as shown in Figure 4-2.
Figure 4-2 Control system homepage interface
After the system is powered on, press any key
and the backlit light will light up. If there is no
keyboard operation after a period of time, the
backlit light will dim.
The meanings of icons in the control interface of
the chillers are shown in Table 4-1.
Table 4-1 Control interface icons
Icon Description
Switch button icon, click to change the
current working state of chiller.
Display the language icon, and click it
to switch the language of the current
interface back and forth to Chinese or
English.
Working status icon, which displays the
current working status of water chillers
in the form of indicator lights.
Green indicates running status.
Red indicates the shutdown state.
Outlet water temperature icon, which
displays the outlet water temperature of
the current chiller (Unit: °C).
Date and time icon, showing the
current date and time of the unit.
Outlet pressure icon, which displays
the current outlet pressure of water
machine in the form of dial (Unit: Bar).
The system mode icon displays the
current operation mode of the system.
Running modes include: Stop, Cycle,
Cool, Heat and Auto. click the current
mode to switch to the next mode.
System main interface icon, click the
icon to enter the system main interface.
System status icon. Click the icon to
view the environment status, running
status and group control status.
Environmental conditions include
outlet water temperature, return water
temperature, indoor temperature and
humidity, outlet water pressure,
return water pressure, battery
maximum temperature, battery
minimum temperature, current grid
voltage, monitoring and dispatching
temperature, environmental
temperature and electronic control
box temperature.
Running status includes working
status of circulating pump,

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EMW90HDNC1U Air-cooled Chiller
17
Icon Description
compressor, external fan, electric
heating, make-up water pump,
cooling fan of electronic control box
and heating belt. Current rotating
speeds of circulating pump,
compressor and external fan can also
be checked.
Group control status includes the
working status of each online unit.
System operation record icon. Click the
icon to view operation record and
operation log.
Operation records include the total
duration and times of chiller operation
in cooling and heating modes, and
the total working duration and times
of circulating pump and external fan.
The operation log includes the time
points when the chiller and key
components are turned on and off
each time.
Operation curve icon. After clicking the
icon, you can view the operation curves
of the cooling setting point, coolant
outlet temperature, coolant outlet
pressure and coolant inlet pressure of
chillers changing with time.
Whether the operation curves of
cooling setting point, coolant outlet
temperature, coolant outlet
temperature and coolant inlet pressure
are displayed on the interface can be
set.
System alarm icon. Click the icon to
view system alarms, including current
alarms and historical alarms.
In the current alarm interface, you
can view the alarm start date and
time point and alarm content.
In the historical alarm interface, you
can view the alarm start date and
time, alarm recovery date and time
point and alarm content.
Icon Description
System setting icon. Click the icon to
set temperature, group control, system
configuration, account number and
time.
On the temperature setting interface,
you can change the cooling set point,
cooling sensitivity, heating set point,
heating sensitivity, outlet high
temperature set point and outlet low
temperature set point, and configure
the control temperature (temperature
control is based on outlet
temperature or monitored
temperature).
In the group control setting interface,
you can change the group control
mode, standby number, local
address, patrol time, active/standby
mode, number of members and
working status of each unit.
In the system configuration interface,
you can change the monitoring
address, monitoring baud rate, on-off
mode, speed limit gear on water
pump and speed limit gear on press.
In the account setting interface, you
can change the operator password.
In the time setting interface, you can
change the time of the control
system.
After clicking the system maintenance
icon, you can manually turn on or off
the system water replenishment, set
the time for delaying the start of
circulating pump, and set the time for
delaying the close of water
replenishment.
System more function icon, click to set
more functions.
When entering the system more
function interface, the operator
password must be entered first. After
the password is entered, the following
operations can be performed:

Check the version information of
control software, display software and
parameter table.
Restore factory settings.

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EMW90HDNC1U Air-cooled Chiller
Icon Description
Water circulation icon indicates that the
unit is in water circulation state and the
circulating pump is in working state.
Refrigeration icon indicates that the unit
is in refrigeration state and the
compressor is in working state.
Heating icon indicates that the unit is in
heating state and the water heater is in
working state.
Water replenishment icon indicates that
the unit is in water replenishment state.
Alarm icon, indicating that the current
unit has an alarm.
4.3 System Start-up and
Shutdown
After the chiller is powered on, if the compressor does
not start, the heating belt will automatically start
heating. When the chiller is powered on for the first
time, it is necessary to ensure that the heating time of
the compressor heating belt is not less than 4 hours
before starting up the chiller.
When the ambient temperature is too low, it may cause
the lubricating oil in the compressor to solidify.
Therefore, when the chiller is powered on for the first
time in a low temperature environment, it is necessary
to perform a 4-hour live standby treatment on the unit
to ensure that the compressor heating belt is
preheated for a sufficient period of time.
Après la mise sous tension du refroidisseur, si le
compresseur ne démarre pas, la ceinture chauffante
commencera automatiquement àchauffer. Lorsque
le refroidisseur est mis sous tension pour la première
fois, il est nécessaire de s'assurer que le temps de
chauffage de la ceinture chauffante du compresseur
n'est pas inférieur à4 heures avant de mettre le
refroidisseur en marche.
Lors du démarrage àbasse température, la viscositéé
levée de l'huile de lubrification peut entraîner des
difficultés de démarrage du compresseur et un
mauvais chargement/déchargement. Un préchauffage
au moyen d'une ceinture chauffante pour
compresseur est donc nécessaire au préalable. Ne dé
branchez pas l'alimentation électrique lorsque l'unité
est arrêtée afin de garantir un chauffage continu de la
bande chauffante du compresseur.
After clicking the switch button every time, the
system switches the working state of the current
chiller.
The dialog box that pops up when the chiller is
start up is shown in Figure 4-3
Figure 4-3 System start-up
After start-up, the status of chiller changes from
"Key Off" to "Running". On any interface, if there
is no keyboard operation for 180 seconds, the
system will automatically return to the homepage
interface.
The dialog box popped up when shutting down is
shown in Figure 4-4.