EcoStruxure Micro Data Center R-Series
Panel Air Conditioner
User Manual
ACRPM500, ACRPM1000, ACRPM2000
TME19714A
Publication Date: 5/2023
Legal Information
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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.
Contents
Legal Information .......................................................................................................................................................... 2
Contents ....................................................................................................................................................................... 3
IMPORTANT SAFETY INSTRUCTIONS – SAVE THESE INSTRUCTIONS ............................................................... 1
Please Note .............................................................................................................................................................. 1
Safety During Installation and Operation .................................................................................................................. 2
Upon Arrival .................................................................................................................................................................. 2
Unpacking, Inspection, and Installation of Spare Air Conditioners ............................................................................... 3
Technical Specifications ............................................................................................................................................... 5
Mechanical Drawings ................................................................................................................................................... 7
Refrigerant Loss, Leak Detection, and Charging ........................................................................................................ 10
Leak Detection and Correction................................................................................................................................ 10
Method One......................................................................................................................................................... 10
Method Two......................................................................................................................................................... 11
Vacuum Pumping.................................................................................................................................................... 11
Charging the System .............................................................................................................................................. 11
Operation Prerequisites .............................................................................................................................................. 11
Piping and Instrumentation Drawings ......................................................................................................................... 12
How the Air Conditioner Works .................................................................................................................................. 15
General Maintenance ................................................................................................................................................. 16
Compressor ............................................................................................................................................................ 16
Condenser and Evaporator Blowers ....................................................................................................................... 16
Inlet Filter ................................................................................................................................................................ 16
How to Remove, Clean, or Re-install a New Filter .............................................................................................. 17
Recommended Preventative Maintenance Schedule ............................................................................................. 17
Electrical Drawings ..................................................................................................................................................... 18
About the Microprocessor Controller .......................................................................................................................... 21
Electrical Characteristics ......................................................................................................................................... 21
Main Board ............................................................................................................................................................. 21
Interface .................................................................................................................................................................. 22
Basic Function ........................................................................................................................................................ 22
Control Logic ........................................................................................................................................................... 23
Symbol Definition ................................................................................................................................................ 23
Compressor ON Conditions:................................................................................................................................ 23
Compressor OFF Conditions: .............................................................................................................................. 23
Temperature Alarm ............................................................................................................................................. 24
PTC Heater Conditions ....................................................................................................................................... 24
Display Panel .......................................................................................................................................................... 24
LED Indicator Light Descriptions ......................................................................................................................... 24
Panel Operation .................................................................................................................................................. 24
Alarm Code ......................................................................................................................................................... 26
Troubleshooting .......................................................................................................................................................... 26
One-year Factory Warranty ........................................................................................................................................ 27
Terms of Warranty................................................................................................................................................... 27
Non-transferable Warranty ...................................................................................................................................... 27
Exclusions ............................................................................................................................................................... 27
Warranty Claims ...................................................................................................................................................... 27
1
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.
WARNING
WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION
CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
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.
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.
2
Safety During Installation and Operation
DANGER
HAZARD OF ELECTRIC SHOCK
The cooling unit must be installed or replaced only by qualified personnel.
Work on electrical connections must be carried out exclusively by trained, qualified electricians.
Ensure the Earthing connection is secure.
Never connect or disconnect the mains power connection while the equipment is under load.
Turn off the Panel Air Conditioner before connecting or disconnecting power.
Remove all electrical connections to the unit before removing the front panel.
Means for disconnection must be incorporated in the fixed wiring in accordance with the wiring
rules.
If the supply cord is damaged, it must be replaced by a special cord or assembly available from
the manufacturer or its service agent to avoid a hazard.
This appliance is not intended for use by persons (including children) with lack of experience and
knowledge, unless they have been given supervision or instruction concerning use of the
appliance by a person responsible for their safety. Children should be supervised to ensure that
they do not play with the appliance.
The appliance must be installed in accordance with applicable national regulations.
Failure to follow these instructions will result in death or serious injury.
CAUTION
HOT EQUIPMENT
The condenser air outlet can get hot. Keep your body parts away from the air outlet.
Failure to follow these instructions can result in injury or equipment damage.
NOTICE
HAZARD OF EQUIPMENT DAMAGE
Never place the Panel Air Conditioner on its side.
If electrical power is momentarily interrupted to the air conditioner and reapplied immediately,
(within 3 to 5 seconds), do not attempt to restart the Air Conditioner for at least three minutes
after the unit has been shut off either accidentally of intentionally.
Do not operate the Panel Air Conditioner in areas containing airborne caustics or chemicals.
The compressor should only be repaired, removed, or replaced by certified personnel.
Only operate the cooling unit with the cover installed.
Ensure all openings of the panel are sealed to avoid ambient air infiltration.
Failure to follow these instructions can result in equipment damage
NOTICE
This appliance should not be accessible to the general public.
Operation of the Panel Air Conditioner at ambient temperature below 10°C or above 50°C will
void all warranties.
Upon Arrival
Please read this manual completely before attempting to use or service the Panel Air Conditioner. Failure to follow
any procedure or warning given here will void the warranty.
These are the original instructions provided by the manufacturer. You can find updates to this document on the
relevant product page of www.se.com.
3
Unpacking, Inspection, and Installation of Spare Air Conditioners
Skip this section if your air conditioner is pre-installed to a Micro Data Center R-Series Unit.
DANGER
HAZARD OF ELECTRIC SHOCK
The cooling unit must be installed or replaced only by qualified personnel.
Work on electrical connections must be carried out exclusively by trained, qualified electricians.
Ensure the Earthing connection is secure.
Seal all openings of panel to avoid ambient air infiltration
Never connect or disconnect the mains power connection while the equipment is under load. Turn off the
Panel Air Conditioner before connecting or disconnecting power.
Failure to follow these instructions will result in death or serious injury.
NOTICE
HAZARD OF EQUIPMENT DAMAGE
Never place the Panel Air Conditioner on its side.
Failure to follow these instructions can result in equipment damage
Do not block the condenser air or inlet path. Provide minimum clearance around the unit as shown:
1. Inspect the Panel Air Conditioner upon arrival. The Panel Air Conditioner should be transported in vertical
position and placed upright on installation. Never place the Air Conditioner on its side. If the Air Conditioner
is placed on its side, place the air conditioner upright and let it sit upright for one hour before applying power.
This allows any escaped compressor oil to return to the compressor.
2. Check for damage that may have occurred during shipping. Look for dents, scratches, loose assemblies,
evidence of oil, etc. Any damage evidence upon receipt should be noted. In case of shipping damage,
contact Customer Support at https://www.apc.com/support.
3. Eye bolts are provided on the top of the unit for lifting. Ensure that the eye bolts are fully screwed in before
lifting the unit.
4
4. Use the eyebolts to lift the Panel Air Conditioner so its mounting posts align with the MDC. Use the M8 bolts
in the hardware bag to secure the Panel Air Conditioner to the MDC.
5. See the Electrical Drawings on page 18 to connect the power supply connector, alarm/Modbus connector
and voltage alarm relay connector to the unit. Connect the earthing wire to the bolt provided, as shown in the
electrical drawings.
6. Turn ON the main supply MCB/Switch to power up and start the unit
5
Technical Specifications
Specification
ACRPM500
ACRPM1000
ACRPM2000
Net capacity (L35,
L35), 50/60 Hz
500/525 W
1000/1050 W
2000/2100 W
Mounting type
Side panel
Ambient Temp Range
10 °C – 50 °C (50 °F – 122 °C)
Refrigeration
Compressor
Rotary
Refrigerant
R 134a
Refrigerant charge
190 g
420 g
920 g
Condenser fan type
Centrifugal Backward fan
Evaporator fan type
Centrifugal Backward fan
Rated internal air flow
(CMH) 50/60 Hz
146/178
331/351
532/566
Expansion device
Capillary
Electrical
Supply voltage
(50/60 Hz)
230 V +/- 10%, 1 phase
Frequency
50 Hz/60 Hz
Rated current
(L35/L35) at 50/60 Hz
1.6 A/1.62 A
2.7 A/2.8 A
4.2 A/5.7 A
Power consumption
(L35/L35) at 50/60 Hz
296 W/329 W
544 W/608 W
950 W/1163 W
Maximum current
at 50/60 Hz
1.95 A/2.02 A
3.75 A/3.87 A
6 A/7.75 A
Starting current
7 A/7.2 A
13.5 A/14.0 A
21 A/28.5 A
Power input terminal
Wago® connector
Mechanical
Body structure
GI body
Color finish
RAL 7035 (PP Coating)
Approximate weight
28 Kg (62 lb)
42 Kg (93 lb)
72 Kg (159 lb)
Approximate weight
(packaged)
83 Kg (183 lb)
107 Kg (236 lb)
162 Kg (357 lb)
Dimensions
(H x W x D)
600 x 350 x 260 mm
(24 x 14 x 10 in)
800 x 430 x 280 mm
(31 x 17 x 11 in)
1200 x 440 x 340 mm
(47 x 17 x 13 in)
6
Controller
Type
Digital with display
Modbus
communication
RS485
Temperature setting
range
25 °C – 35 °C (77°F – 95 °F)
Safety Features
Alarm output
Yes
Voltage sensing alarm
Yes
HP Pressure Switch
(OUT/IN) psig
300/240
LP Pressure Switch
(OUT/IN) psig
3/18
Additional Features
Re-evaporative
condensing unit
Yes
Anti-corrosive coating
on condenser coil
Yes
7
Mechanical Drawings
ACRPM500 (Included in MDC24UR500ACI/ MDC24UR500ACI-IN)
M6 BOLT x 25 MM LENGTH
25
8
ACRPM1000 (Included in MDC24UR1KACI/MDC24UR1KACI-IN)
M8 BOLT x 25 MM LENGTH
25
9
ACRPM2000 (Included in MDC42UR2KACI/MDC42UR2KACI-IN)
M8 BOLT x 25 MM LENGTH
25
10
Refrigerant Loss, Leak Detection, and Charging
NOTICE
HAZARD OF EQUIPMENT DAMAGE
Leak detection, correction, vacuum pumping, and charging must only be performed by qualified professionals.
Failure to follow these instructions can result in equipment damage
The Panel Air Conditioner was thoroughly tested before leaving the factory to help insure against refrigerant leaks,
Shipping damage or microscopic leaks not found during manufacture may require repair and recharging of the
system. This work should be performed by qualified professionals only, generally available in any reputable air
conditioner repair or Service Company in your location area.
Refer to the data on your nameplate, which specifies the type of refrigerant and the charge size in grams. Before
recharging, make sure there are no leaks and that the system has been properly evacuated by a deep vacuum
pump. Charging should be done with both the suction and discharge gauges installed and both the pressures should
be monitored.
Leak Detection and Correction
Method One
1. Remove the cover from the unit. When the cover is partially removed, disconnect the display cable on
the inside of the cover.
Use a charging hose to connect a nitrogen cylinder to the liquid line split valve at the bottom of the unit.
Gradually raise the system pressure to 2.8 MPa (406 psig).
2. Apply soapy water at the connecting joints and brazed joints for leak detection.
3. Repair any leak sources, then refill the nitrogen to 2.8 MPa (406 psig). Wait for over 6 hours to ensure
the system pressure does not fall below 2.8 MPa (406 psig).
4. Re-install the front cover.
11
Method Two
1. Remove the cover. When the cover is partially removed, disconnect the display cable on the inside of the
cover.
Use a charging hose to connect an R134a cylinder the liquid line split valve at the bottom of the unit.
Gradually raise system pressure to 0.3 MPa (43 psig).
2. Remove R134a cylinder and connect the nitrogen cylinder to the system. Gradually raise the system
pressure to 2.8 MPa (406 psig).
3. Use both an HFC electronic leak detector and the bubble gas leak testing method at the connecting joints
and brazed joints to detect any leaks.
4. Repair any leak sources if found. Refill the nitrogen to 2.8 MPa and wait for more than six hours to ensure
that the pressure does not decrease.
Vacuum Pumping
1. Exhaust the high-pressure nitrogen from the system.
2. Connect a charging hose to the liquid line valve and to the vacuum pump.
3. Start the vacuum pump and bring the system pressure below 650 Pa (0.09 psi).
4. Do not start the unit until vacuum pump is turned off and unit is charged.
Charging the System
1. Turn off the vacuum pump.
2. Hang an R134a cylinder inverted from a spring type weighing machine. Write down the initial reading/weight.
Then connect a charging hose to the hanging cylinder and let out some refrigerant to purge the hose.
Connect the hose to the liquid line split valve ¼ in port. Open the valve gradually to allow liquid refrigerant
into the system. Close the valve when the required quantity of refrigerant is in the system (check the unit
nameplate for details).
3. Cap the liquid line split valve. Keep it capped after charging is complete.
The Panel Air Conditioner is now ready for operation.
Operation Prerequisites
Ignoring the following operation prerequisites may void the warranty.
If the Panel Air Conditioner is to maintain low temperature in the cabinet or enclosure, (Lower than the room dew
point) it is recommended that an electrical lockout or safety switch be installed in the enclosure to stop the operation
of the unit while the door is open. After shutoff, opening the door before the inside temperature has risen above the
room dew point might result in condensation on the circuit boards.
The enclosure air shall contain is limited moisture. If moisture flows from the drain tube continuously this can only
mean that ambient air is entering the enclosure. Remember that frequent opening of the enclosure’s door admits
humid air, which the air conditioner must then dehumidify.
NOTICE
HAZARD OF EQUIPMENT DAMAGE
If electrical power is momentarily interrupted to the air conditioner and reapplied immediately, (within 3 to 5
seconds), do not attempt to re-start the Air Conditioner for at least three minutes after the unit has been
shut off either accidentally of intentionally.
Do not operate the Panel Air Conditioner in areas containing airborne caustics or chemicals.
Failure to follow these instructions can result in equipment damage
Operation of the Panel Air Conditioner in areas containing airborne caustics or chemicals can rapidly
deteriorate filters, condenser coils, blowers, and motors, etc.
NOTICE
Operation of the Panel Air Conditioner at ambient temperature below 10°C or above 50°C will void all warranties.
12
Piping and Instrumentation Drawings
ACRPM500 (Included in MDC24UR500ACI/ MDC24UR500ACI-IN)
13
ACRPM1000 (Included in MDC24UR1KACI/MDC24UR1KACI-IN)
14
ACRPM2000 (Included in MDC42UR2KACI/MDC42UR2KACI-IN)
15
How the Air Conditioner Works
The panel air conditioner works on a closed loop principal and is designed specifically to cool the electronic
components of an enclosure.
1. Hot air from the enclosure is drawn inside the evaporator section of air conditioner by the evaporator blower.
2. This air is made to pass through cooling/evaporator coil of the air conditioner by the evaporator blower
thereby discharging the cool air back to the enclosure.
3. In the evaporator coil, the liquid refrigerant is converted to a gaseous state by the heat from the enclosure
air. The refrigerant absorbs this heat, causing the enclosure air to cool.
4. The refrigerant is then compressed by the compressor so that it achieves a higher temperature than the
ambient air.
5. The condenser fan draws the ambient air inside the condenser section through the inlet filter and passes it
over the condenser coil and finally, returns it to the room/ambient air.
6. The condenser in contact with the ambient air expels the excess heat. As a result, the temperature of the
refrigerant drops and is converted back into liquid. The liquid refrigerant is injected back into the evaporator
through a capillary which cools it further and the cycle repeats.
7. The enclosure air drawn into the evaporator and ambient air are not allowed to mix, which helps the air
inside the enclosure remain clean, cool, and filtered.
16
General Maintenance
Compressor
The compressor requires no regular maintenance. It is hermetically sealed and lubricated at the factory.
NOTICE
HAZARD OF EQUIPMENT DAMAGE
The compressor should only be repaired, removed, or replaced by certified personnel.
Failure to follow these instructions can result in equipment damage
Condenser and Evaporator Blowers
Blower motors require no maintenance. All bearing, shafts, etc. are lubricated during manufacturing for the life of the
motor. If necessary, the entire blower assembly must be removed.
Inlet Filter
Proper maintenance of the inlet filter helps to ensure normal operation of your Panel air conditioner. If filter
maintenance is delayed or ignored, the maximum ambient operating temperature will decrease.
As the compressor operating temperature increases above normal due to dirty or clogged inlet filter (or clogged
condenser coil), the air conditioner’s compressor will stop operating due to actuation of the thermal overload cut-out
switch located on the compressor housing. As soon as the compressor temperature has dropped to within the
switch’s cut-in setting, the compressor will restart automatically. The temperature will continue to rise, and the
compressor will continue to shut down until the filter has been cleaned or replaced.
It is recommended that the air conditioner be stopped when abnormally high compressor operating temperature
causes automatic shutdown of the unit. Repeated compressor shutdowns are symptomatic of clogged or dirty filters,
thus causing a reduction in cooling airflow across the surface of the compressor and condenser coil.
NOTICE
HAZARD OF EQUIPMENT DAMAGE
Continued operation under the above conditions can and will damage and shorten compressor life.
Failure to follow these instructions can result in equipment damage
The air conditioner features easily removable inlet filter to facilitate necessary cleaning. There should be no reason
to neglect this necessary maintenance.
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