Schneider Electric ACRMD4KI-1, ACRMD4KI-2, ACRMD4KI-3 User Manual
Rackmount 3.5-kW Air Conditioning Unit
User Manual
ACRMD4KI-1, ACRMD4KI-2, ACRMD4KI-3
990-6186-001
Release Date: 06/2019
www.schneider-electric.com
Legal Information
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subsidiaries referred to in this guide are the property of Schneider Electric SE or its
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Schneider Electric.
Schneider Electric does not grant any right or license for commercial use of the guide
or its content, except for a non-exclusive and personal license to consult it on an "as
is" basis. Schneider Electric products and equipment should be installed, operated,
serviced, and maintained only by qualified personnel.
As standards, specifications, and designs change from time to time, information
contained in this guide may be subject to change without notice.
To the extent permitted by applicable law, no responsibility or liability is assumed by
Schneider Electric and its subsidiaries for any errors or omissions in the informational
content of this material or consequences arising out of or resulting from the use of the
information contained herein.
Table of Contents
Safety............................................................................................................5
Important Safety Instructions — SAVE THESE INSTRUCTIONS....................5
Safety During Installation and Operation.......................................................6
General Information....................................................................................9
Document Overview ...................................................................................9
Equipment Disposal ....................................................................................9
Receiving and Inspecting the Unit ..............................................................10
Storing the Unit Before Installation ............................................................. 10
Unpacking the Unit ................................................................................... 11
Moving the Unit ........................................................................................ 11
Intended Use ........................................................................................8
Original Instructions ..............................................................................9
Save These Instructions ........................................................................9
Manual Updates ...................................................................................9
Cross-Reference Symbol Used in This Manual........................................9
Abbreviations .......................................................................................9
General Information ..............................................................................9
Please Recycle...................................................................................10
Waste Electrical and Electronic Equipment (WEEE) Disposal.................10
Filing a Claim......................................................................................10
Unit Overview ............................................................................................ 12
Introduction..............................................................................................12
Equipment Guidelines ............................................................................... 13
Working Conditions and Environmental Limits.......................................13
Standard Features and Options .................................................................14
Standard Features ..............................................................................14
Optional Features ............................................................................... 15
Technical Data....................................................................................15
Dimensions and Weights.........................................................................17
Indoor Unit ............................................................................................... 17
Outdoor Units ........................................................................................... 17
Weight .....................................................................................................18
Service Clearance .................................................................................... 18
Airflow Clearance .....................................................................................18
Access Locations ..................................................................................... 19
Component Identification......................................................................... 20
Inventory..................................................................................................20
External Components ............................................................................... 20
Indoor Unit ......................................................................................... 20
Outdoor Unit ....................................................................................... 21
Internal Components ................................................................................ 22
Indoor Unit ......................................................................................... 22
Outdoor Unit ....................................................................................... 23
Installation..................................................................................................24
Site Preparation ....................................................................................... 24
Incoming Power Supply Requirements ................................................. 24
Before You Start .......................................................................................24
990-6186-001 3
Positioning Units....................................................................................... 25
Panel Removal .........................................................................................26
Indoor Unit ......................................................................................... 26
Outdoor Unit ....................................................................................... 27
Display Interface....................................................................................... 28
Mechanical Connections ...........................................................................28
Installing the Indoor Unit in the Rack.....................................................28
Installing the Outdoor Unit ................................................................... 29
Piping Kit Application .......................................................................... 30
Refrigerant Piping ...............................................................................31
Drain Connection ................................................................................36
Electrical Connections .............................................................................. 37
Wire Cross-Section Ratings................................................................. 38
Connection Interface................................................................................. 39
Charging the Refrigeration System ............................................................42
Leak Detection ...................................................................................42
Vacuum Pumping................................................................................43
Calculating the Refrigerant Charge.......................................................44
Charging the Refrigerant ..................................................................... 45
Commissioning..........................................................................................46
Start-Up Inspection Checklist ....................................................................46
Electrical Inspection Checklist ................................................................... 47
Mechanical Inspection Checklist ................................................................ 48
Operation ...................................................................................................49
Using the Display......................................................................................49
Maintenance .............................................................................................. 56
Preventive Maintenance............................................................................56
4 990-6186-001
Safety
Safety
Important Safety Instructions — SAVE THESE INSTRUCTIONS
Read these instructions carefully and look at the equipment to become familiar
with it before trying to install, operate, service or maintain it. The following safety
messages may appear throughout this manual or on the equipment to warn of
potential hazards or to call attention to information that clarifies or simplifies a
procedure.
The addition of this symbol to a “Danger” or “Warning” safety
message indicates that an electrical hazard exists which will
result in personal injury if the instructions are not followed.
This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages with this
symbol to avoid possible injury or death.
DANGER
DANGER indicates a hazardous situation which, if not avoided, will result in
death or serious injury.
Failure to follow these instructions will result in death or serious injury.
WARNING
WARNING indicates a hazardous situation which, if not avoided, could result
in death or serious injury.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
CAUTION
CAUTION indicates a hazardous situation which, if not avoided, could result in
minor or moderate injury.
Failure to follow these instructions can result in injury or equipment
damage.
NOTICE
NOTICE is used to address practices not related to physical injury. The safety
alert symbol shall not be used with this type of safety message.
Failure to follow these instructions can result in equipment damage.
Please Note
Electrical equipment should only be installed, operated, serviced, and maintained
by qualified personnel. No responsibility is assumed by Schneider Electric for any
consequences arising out of the use of this material.
A qualified person is one who has skills and knowledge related to the construction,
installation, and operation of electrical equipment and has received safety training
to recognize and avoid the hazards involved.
990-6186-001 5
Safety During Installation and Operation
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe
electrical work practices.
• This equipment must be installed and serviced by qualified personnel only.
• Turn off all power supplying this equipment before working on or inside the
equipment.
• Replace all devices, doors, and covers before turning on power to this
equipment.
• Always use a properly rated voltage sensing device to confirm power is off.
• If the power supply cord is damaged, it must be replaced by an equivalent
cord or assembly available from the manufacturer or its service agent.
Failure to follow these instructions will result in death or serious injury.
WARNING
Safety
ELECTRICAL HAZARD
• Electrical service must conform to local and national electrical codes and
regulations.
• The equipment must be grounded.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
WARNING
HAZARD FROM MOVING PARTS
Keep hands, clothing, and jewelry away from moving parts. Check the
equipment for foreign objects before closing the doors and starting the
equipment.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
WARNING
DAMAGE TO EQUIPMENT OR PERSONNEL
• The equipment is heavy. For safety purposes, adequate personnel must be
present when moving this item.
• The load must always be solidly anchored to the bearing element of the
lifting equipment and means of transport.
• No one should be near the suspended load, nor in the working area of the
crane, forklift, truck, or any other lifting equipment or means of transport.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
6 990-6186-001
Safety
WARNING
HAZARD TO EQUIPMENT OR PERSONNEL
This equipment is not to be operated or installed by persons with reduced
physical, sensory, or mental capabilities, or persons lacking experience or
knowledge unless they have been given supervision or instruction. Children are
not to operate or play on or around this equipment.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
CAUTION
HAZARD FROM UNPROTECTED OUTPUT
Apply circuit protection to all outputs.
Failure to follow these instructions can result in injury or equipment
damage.
CAUTION
HAZARD TO EQUIPMENT OR PERSONNEL
Do not operate your air conditioner in a wet room such as a bathroom or laundry
room.
Failure to follow these instructions can result in injury or equipment
damage.
NOTICE
STATIC ELECTRICITY HAZARD
Circuit boards contained within this unit are sensitive to static electricity. Use
one or more electrostatic-discharge devices while handling the board.
Failure to follow these instructions can result in equipment damage.
NOTICE
DAMAGE FROM EXPOSURE
Leaving the equipment uncovered and exposed to possible damage from the
environment will void the factory warranty.
Failure to follow these instructions can result in equipment damage.
NOTICE
DAMAGE TO REFRIGERATION CIRCUIT
• Make sure the compressor has been pre-heated for at least 24 hours in the
event the system is not in operation for an extended period of time.
Failure to follow these instructions can result in equipment damage.
990-6186-001 7
Intended Use
Safety
NOTICE
DAMAGE TO EQUIPMENT
• If the power supply cord is damaged, it must be replaced by the
manufacturer.
• An all-pole disconnection device that has at least 3-mm clearances in all
poles and has a leakage current that may exceed 10 mA, the residual
current device (RCD) having a rated residual operating current not
exceeding 30 mA, and disconnection must be incorporated in the fixed
wiring in accordance with the wiring rules.
• Type and rating of fuses: glass tube 250 V, 3.15 A
Failure to follow these instructions can result in equipment damage.
The cooling units provide air conditioning within the limits and methods described
in this manual. This equipment must be installed and applied in accordance with
the instructions provided. No modifications may be made to the units or their parts
without explicit written consent from Schneider Electric. Any mechanical or
electrical modification voids factory warranty.
8 990-6186-001
General Information
General Information
Document Overview
Original Instructions
These are the original instructions provided by the manufacturer.
Save These Instructions
This manual contains important instructions that must be followed during
installation, operation, and maintenance of the cooling unit.
Manual Updates
Schneider Electric™policy is one of continuous technological innovation and the
company reserves the right to amend any data herein without prior notice. The
images shown in this manual are for descriptive purposes only and they may differ
from specific models that are selected.
NOTE: Unit images and component identification information are examples
only. The final configuration of the unit may change according to the different
options.
Check for updates to this manual on the Schneider Electric Web site,
www.schneider-electric.com/support. Select the Download Documents and
Software link under the Support tab and enter the manual part number or SKU
for your equipment in the search field. See the back cover of this manual for the
part number.
Cross-Reference Symbol Used in This Manual
See another section of this document or another document for more
information on this subject.
Abbreviations
The following abbreviations and terms are used in this manual:
• CFD: Computational fluid dynamics
• EXV: Electronic expansion valve
• PTC: Positive Temperature Coefficient
Equipment Disposal
General Information
• This air-conditioning unit contains fluorinated greenhouse gases.
• Installation, servicing, maintenance, and repair of this unit must be performed
by qualified personnel.
• Un-installation and recycling of the product must be performed by qualified
personnel.
• When the unit is checked for leaks, proper record keeping of all checks is
strongly recommended.
990-6186-001 9
Please Recycle
The shipping materials are recyclable. Save them for later use, or dispose of them
appropriately.
Waste Electrical and Electronic Equipment (WEEE) Disposal
Schneider Electric products comply with international directives on
the Restriction of Hazardous Substances (RoHS) in electronic and
electrical equipment and the disposal of Waste Electrical and
Electronic Equipment (WEEE). Dispose of any waste electronic or
electrical equipment with the appropriate recycling center. Contact
Schneider Electric for assistance.
Receiving and Inspecting the Unit
The cooling unit is packaged in a wooden crate or anchored to a pallet and
covered with transparent film.
Upon delivery, check that the unit is intact and immediately notify the carrier in
writing of any damage that can be attributed to careless or improper
transportation. Check for any damage on the area upon which the display
interface is mounted.
General Information
In case of shipping damage, do not operate the cooling unit. Keep all packaging
for inspection by the shipping company and contact Schneider Electric
Corporation.
Filing a Claim
If damage is identified on receipt of the equipment, note the damage on the bill of
lading and file a damage claim with the shipping company. Contact Schneider
Electric Worldwide Customer Support at one of the numbers listed on the Web
page on the back page of this manual for information on how to file a claim with
the shipping company. The shipping claim must be filed at the receiving end of the
delivery.
NOTE: In case of shipping damage, do not operate the equipment. Keep all
packaging for inspection by the shipping company and contact Schneider
Electric.
Storing the Unit Before Installation
DAMAGE FROM EXPOSURE
Leaving the equipment uncovered and exposed to possible damage from the
environment will void the factory warranty.
NOTICE
Failure to follow these instructions can result in equipment damage.
The storage environment for the series AC should comply with GB4798.1-2005.
Item Requirements
Storage environment Indoor, clean (without dust)
Ambient humidity
Ambient temperature
10 990-6186-001
15–85％RH (without condensation)
–20 to 52℃ (–4 to 129.2°F)
General Information
75°
105°
na91282-30
Unpacking the Unit
Move the unit near its final position before unpacking it for inspection.
The unit is packed with corrugated paper. Remove all packing materials on site.
Moving the Unit
WARNING
DAMAGE TO EQUIPMENT OR PERSONNEL
• The equipment is heavy. For safety purposes, adequate personnel must be
present when moving this item.
• The load must always be solidly anchored to the bearing element of the
lifting equipment and means of transport.
• No one should be near the suspended load, nor in the working area of the
crane, forklift, truck, or any other lifting equipment or means of transport.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
Indoor Unit
Outdoor Unit
Lifting and transporting the units must be carried out by qualified personnel as
described in this manual.
Use all relevant safety standards to prevent any possible damage to people or
objects.
The cooling unit is packaged in a carton. The recommended tools for moving and
installing the equipment include the following:
Forklift Pallet Jack
The condensing unit is packaged in a carton. The recommended tools for moving
and installing the equipment include the following:
Pallet Jack Forklift Crane
Keep the inclination of the outdoor unit within 75–105 degrees.
990-6186-001 11
Unit Overview
Introduction
This AC unit series, an air conditioning system of precision environmental control
in a server cabinet, provides precise temperature control, safety and reliability,
high energy efficiency design, and remote monitoring.
This series also features efficient refrigeration, high reliability, high sensible-heat
factor, intelligent monitoring, rapid installation, convenient maintenance, and
compact structure. R410A refrigerant is used as required internationally for
environmental protection.
Precise Temperature Control
This series of air conditioners has a temperature control of up to ±2.0°C (3.6°F).
Intelligent microprocessing control monitors any change in the server cabinet and
responds with control processing in advance rather than reacting to the change of
the environment at that time.
Safety and Reliability
Unit Overview
Keep the unit running 24 hours a day to keep it reliable. The advanced
microprocessing system of the units automatically adjusts machine operation and
reduces faults. Automatic alarms and diagnostics aid in maintenance and
servicing to help protect the unit and prolong the life of the unit.
High Energy Efficiency Design
The DC brushless, axial flow, centrifugal fan features minimal vibration, low noise,
and high reliability. The high-efficiency, finned-tube heat exchanger greatly
improves the heat exchange efficiency. The loop developed and verified to a
specific model ensures each loop is uniformly distributed and the heat exchanger
is fully used.
Remote Monitoring
Remote monitoring includes an RS485 interface and Modbus protocol.
• Telemetry Function: Remotely read the return and supply air temperature,
humidity of return, and working state of the unit.
• Remote Function: Remotely read the open and close state, high or low
temperature and return air humidity, and normal or failure fan state.
Cooling Control
• Temperature Control Function
◦ Indoor temperature controls system
• Cooling Regulation Function
◦ Variable-speed compressor
◦ Cooling output range of 25–100% (16–90Hz)
• Temperature
◦ Regulated temperature range of 19–30°C (66.2–86.0°F)
◦ Adjustable temperature ±2.0°C (3.6°F)
12 990-6186-001
Unit Overview
Equipment Guidelines
Working Conditions and Environmental Limits
Indoor Unit
Limit Working Conditions
Power Supply
Room Conditions
Temperature
Humidity
Maximum Altitude
Storage Conditions
Temperature
Outdoor Unit
Limit Working Conditions
Power Supply
Ambient Conditions
Temperature
Maximum Altitude
200–240 V~, 1 Ph, 50 Hz
16–43℃ (60.8–109.4°F)
15％–65％RH (without condensation)
1000 m (3281 ft), de-rated for more than
1000 m (3281 ft)
–20 to 52℃ (–4.0 to 129.2°F)
200–240 V~, 1 Ph, 50 Hz
–35.0 to 45.0°C (–31.0 to 113.0°F)
1000 m (3281 ft), de-rated for more than
1000 m (3281 ft)
Storage Conditions
Temperature
–20 to 52℃ (–4.0 to 129.2°F)
990-6186-001 13
Standard Features and Options
Standard Features
Indoor Unit
Feature Description
Unit Overview
Evaporator
EXV The EXV improves the control precision and response
Fan
Controller The unit controller features power recovery and fault
Filter
The finned tube heat exchanger with high-efficiency
internal thread copper pipes, hydrophilic foil, CFD flow
field analysis, and optimal matching improve the heat
transfer efficiency.
speed for precision cooling while the system is stable to
save energy.
The DC fan is continuously variable in speed and can
quickly respond to heat loads. It features high airflow,
high efficiency, long service life, and low noise.
warning. It has a terminal block connection interface.
The aluminum air filter provides a clean air supply.
Outdoor Unit
Feature Description
Compressor The inverter-driven compressor adjusts the refrigerating
capacity. The frequency conversion control technology of
the compressor and the air supply temperature control of
the unit enable the unit to flexibly adjust the refrigerating
capacity under different heat loads, to provide a constant
supply of air temperature, and reduce air temperature
fluctuations. The running frequency of the compressor
may be minimized under low thermal load conditions to
ensure that the supply air temperature of the unit does not
drop too low, and the compressor can be prevented from
frequent start and stop to improve the efficiency and
reliability of the unit and avoid condensation resulting from
too low supply air temperature.
Fan
Condenser Efficient finned-tube heat exchanger with hydrophilic fins
14 990-6186-001
An axial flow, low-noise fan blade features wide voltage
range and high reliability. The fan has multi-level air flow
control, which improves the operation stability of the unit.
does not retain dust and is easy to clean and maintain.
Unit Overview
Optional Features
Feature Description
Tube The copper tube includes threaded joints, bell nuts, and
insulation material for the outer package. The tube is sturdy,
does not corrode easily, and withstands high temperature
and high pressure.
Technical Data
Condensate
Drain Pump
Low Ambient
Temperature Kit
Positive
Temperature
Coefficient
The low noise DC brushless water pump has a lift that
reaches 5 meters (16.4 ft).
The low ambient temperature kit provides the capability to
operate in temperatures below –15°C (–5°F).
The structure is compact and the heating is uniform.
The PTC heater installed in the indoor unit is used for heat
compensation when the IT load is low.
(PTC) Heater
Indoor Unit
Total Cooling Capacity 3.6 kW (12,300 BTU/hr)
Sensible Cooling Capacity* 3.5 kW (11,900 BTU/hr)
Rated Power Input 200–240 V~, 1 Ph, 50 Hz
Rated Air Volume
Number of Fans 1
IDU Fan Input Power 0.43 kW
700 m
3
/h (410 SCFM)
Size of Liquid Pipe/Air Pipe
9.52/12.7 mm (0.37/0.50 in.)
Connection
Energy Efficiency Ratio (EER) 2.5
Sound Pressure Level 62.5 dB(A)
*Data at 35°C (95°F) RAT, 23%RH, outdoor air temperature 35°C (95°F)
Outdoor Unit
Heat Exchange 6.3 kW
Rated Air Volume
1700 m
Input Power 1.00 kW
Number of Fans 1
Number of Compressors
1
Sound Pressure Level 51.5 dB(A)
3
/h (1000 SCFM)
990-6186-001 15
Refrigerant
Unit Overview
Refrigerant Type
R410A
Refrigerant Charge 1.65 kg (58.2 oz)
CO
Equivalent 3.445 tonnes (7594.9 lb)
2
GWP
2088
16 990-6186-001
Dimensions and Weights
FRONT OF UNIT
484 (19.1)
218
(8.6)
752 (29.6)
na6186-02a
856 (33.7)
617
(24.3)
296 (11.7)
359 (14.1)
na91282-31a
Dimensions and Weights
Indoor Unit
NOTE: Display interface is optional.
Outdoor Units
990-6186-001 17
Weight
600 mm (24 in.)
600 mm (24 in.)
na91282-33a
≥2 m
(≥6.5 ft)
≥0.5 m
(≥1.5 ft)
≥0.5 m
(≥1.5 ft)
≥0.5 m
(≥1.5 ft)
na91282-34a
Dimensions and Weights
Service Clearance
Unit
Indoor unit
Outdoor unit 48 kg (105.8 lb)
Operating Weight – kg (lb)
26 kg (57.3 lb)
Airflow Clearance
18 990-6186-001
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