Durastar DRA2U18M1A, DRA3U28M1A, DRA4U36M1A, DRA5U48M1A Installation Manual
INSTALLATION MANUAL
MULTI-ZONE OUTDOOR UNIT
SPLIT-STYLE AIR CONDITIONER
DRA2U18M1A, DRA3U28M1A, DRA4U36M1A, DRA5U48M1A
Model Number:
Serial Number:
Purchase Date:
Installing Contractor Company Name:
TIP
Capture relevant information about your Durastar mini-split equipment before it is
installed and write it above for future reference.
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TABLE OF CONTENTS
TABLE OF CONTENTS ............................................................................................................................. 2
INTRODUCTION .......................................................................................................................................... 3
WARNINGS .................................................................................................................................................... 3
IMPORTANT SAFETY PRECAUTIONS .............................................................................................4
OPERATING TEMPERATURES .............................................................................................................7
ACCESSORIES .............................................................................................................................................. 8
PARTS IDENTIFICATION ......................................................................................................................... 9
OUTDOOR UNIT INSTALLATION ...................................................................................................... 10
STEP 1: SELECT INSTALLATION LOCATION ............................................................................. 10
STEP 2: INSTALL THE DRAIN JOINT ...............................................................................................11
STEP 3: MOUNT THE OUTDOOR UNIT .......................................................................................... 12
STEP 4: CONNECT THE SIGNAL AND POWER CABLES ..................................................... 13
REFRIGERANT PIPING CONNECTIONS ........................................................................................ 15
STEP 1: CUT PIPES .....................................................................................................................................17
STEP 2: REMOVE BURRS .......................................................................................................................17
STEP 3: FLARE PIPE ENDS .................................................................................................................. 18
STEP 4: CONNECT PIPES ...................................................................................................................... 19
AIR EVACUATION ...................................................................................................................................... 21
ELECTRICAL AND GAS LEAK CHECKS ........................................................................................ 22
TEST RUN ......................................................................................................................................................23
TROUBLESHOOTING ..............................................................................................................................24
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INTRODUCTION
To better serve you, please do the following before contacting customer service:
• If you received a damaged product, immediately contact the retailer or dealer that sold you the
product.
• Read and follow this owner's manual carefully to help you use and maintain your air conditioner.
• Read the troubleshooting section of this manual as it will help you diagnose and solve common
issues.
• Visit us on the web at www.durastar.com to download product guides and up-to-date information.
• If you need warranty service, our friendly customer service representatives are available via email
at questions@durastar.com or by telephone at 1-888-320-0706.
WARNINGS
Symbols Used in This Manual
The warning symbol indicates cautionary information for the user. Extra care and
precautions should be taken to ensure the user's safety.
The pencil indicates any manufacturer notes relating to surrounding content. These may
include further clarifications or call-outs.
A light bulb symbol indicates suggested manufacturer tips for the user to get the most
out of the Durastar equipment and to accommodate the best user experience.
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IMPORTANT SAFETY PRECAUTIONS
Improper handling can cause serious damage or injury. Please read the following safety
information in its entirety.
Operation, Cleaning, and Maintenance Safety Precautions
• Children and people with reduced physical, sensory, or mental capabilities, or lack of experience
and knowledge, should only use this air conditioner if they are given supervision or instructions
concerning use of the air conditioner in a safe way and understand the hazards involved.
• Children should not play with the air conditioner.
• Never stick fingers or any other body parts into the air conditioner openings. The internal fan may
be rotating at high speeds, and may result in injury.
• After removing the filter, do not touch the fins in order to avoid injury.
• Maintenance must be performed by qualified professionals. Otherwise, you may experience
personal injury or damage to the air conditioner and surrounding property.
• Do not repair the air conditioner by yourself. It may cause electric shock or damage. Please
contact a qualified service representative when you need to repair the air conditioner.
• Do not block the air outlet or air inlet. This could cause a malfunction.
• Do not spill water on the remote control as this can permanently damage the remote.
• If the below problems occur, please turn off the air conditioner and disconnect power at the circuit
breaker immediately. Then contact your dealer or a qualified professional for service.
• The power cord is overheating or damaged.
• There is an abnormal sound during operation.
• The circuit breaker trips frequently.
• The air conditioner gives off a burning smell.
• The indoor unit is leaking.
• If the air conditioner operates under abnormal conditions, it may cause malfunctions, electric
shock, or fire hazard.
• When turning the unit on or off via the emergency operation switch, press the switch with an
insulated object other than metal.
• Do not step on the top panel of the unit, or put heavy objects on the top panel. This could cause
damage or personal injury.
• Cleaning and user maintenance should not be performed by children without supervision.
• Do not spray water on the indoor unit. This could cause electric shock or a unit malfunction.
• Do not use flammable materials such as hair spray, lacquer, or paint near the air conditioner as
they may catch fire.
• Do not operate the air conditioner in places near combustible gases. Emitted gases may collect
around the air conditioner and cause an explosion.
• Do not use fire or a hair dryer to dry the filter. This could cause a deformation or fire hazard.
• Do not wash the air conditioner with water as this could cause an electric shock.
• Disconnect the power supply by turning it off at the circuit breaker when cleaning the air
conditioner. Otherwise, you could risk electric shock.
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Electrical Safety
• Only use the specified power cord. If the power cord is damaged, it must be replaced by the
manufacturer, its service agent, or similarly qualified persons in order to avoid a hazard.
• Keep the power plug clean. Remove any dust or grime that accumulates on or around the plug.
Dirty plugs can cause fire or electric shock.
• Do not pull the power cord to unplug unit. Hold the plug firmly and pull it from the outlet. Pulling
directly on the cord can damage it, which can lead to fire or electric shock.
• Do not connect the air conditioner to a multi-purpose socket. Doing so could cause a fire hazard.
• Do not modify the length of the power supply cord or use an extension cord to power the unit.
• If the supply cord is damaged, it must be replaced by the manufacturer, a service agent, or a
similarly qualified person in order to avoid a safety hazard.
• Do not share the electrical outlet with other appliances. Improper or insufficient power supply can
cause fire or electrical shock.
• The product must be properly grounded at the time of installation, or electrical shock may occur.
• For all electrical work, follow all local and national wiring standards and regulations. Connect
cables tightly, and clamp them securely to prevent external forces from damaging the terminal.
Improper electrical connections can overheat and cause fire, and may also cause shock. All
electrical connections must be made according to the Electrical Connection Diagram located on
the panels of the indoor and outdoor units.
• All wiring must be properly arranged to ensure that the control board cover can close properly. If
the control board cover is not closed properly, it can lead to corrosion and cause the connection
points on the terminal to heat up, catch fire, or cause electrical shock.
• The air conditioner’s circuit board (PCB) is designed with a fuse to provide overcurrent protection.
The specifications of the fuse are printed on the circuit board.
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Installation Safety
• Installation must be performed by an authorized dealer or specialist. Improper installation can
cause water leakage, electrical shock, or fire. (In North America, installation must be performed in
accordance with NEC and CEC requirements by authorized personnel only.)
• Installation must be performed according to the installation instructions. Improper installation can
cause water leakage, electrical shock, or fire.
• This air conditioner shall be installed in accordance with national and local wiring regulations.
• Contact an authorized service technician for repair or maintenance of this unit.
• Only use the included accessories, parts, and specified parts for installation. Using non-standard
parts can cause water leakage, electrical shock, fire, and can cause the unit to fail.
• Install the unit in a firm location that can support the unit’s weight. If the chosen location cannot
support the unit’s weight, or the installation is not done properly, the unit may fall and cause
serious injury and damage.
• Install drainage piping according to the instructions in the installation manual. Improper drainage
may cause water damage to your home and property.
• For units that have an auxiliary electric heater, do not install the unit within 3 feet (1 meter) of any
combustible materials.
• Do not install the unit in a location that may be exposed to combustible gas leaks. If combustible
gas accumulates around the unit, it may cause a fire.
• Do not turn on the power until all work has been completed.
• When moving or relocating the air conditioner, consult experienced service technicians for
disconnection and re-installation of the unit.
Additional Precautions
• Turn off the air conditioner and disconnect the power if you are not going to use it for a long time.
• Turn off and unplug the unit during storms.
• Make sure that water condensation can drain unhindered from the unit.
• Do not operate the air conditioner with wet hands. This may cause electric shock.
• Do not use this device for any other purpose than its intended use.
• Do not climb onto or place objects on top of the outdoor unit.
• Do not allow the air conditioner to operate for long periods of time with doors or windows open, or
if the humidity is very high.
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OPERATING TEMPERATURES
Your air conditioner is designed to operate in the following indoor and outdoor temperatures. When
your air conditioner is used outside of the following temperature ranges, certain safety features may
activate and turn off the unit to protect it from damage.
TEMPERATURE RANGES
COOL mode HEAT mode DRY mode
Indoor Air
Temperature
Outdoor Air
Temperature
To further optimize the performance of your unit, do the following:
• Keep doors and windows closed.
• Limit energy usage by using TIMER ON and TIMER OFF features.
• Do not block air inlets or outlets.
• Regularly inspect and clean air filters.
NOTE
Your Durastar air conditioner's outdoor unit is equipped with a base pan heater, allowing it
to continue to operate at freezing temperatures as low as -13°F (-25°C). When outdoor air
temperatures are at or below 32°F (0°C), we strongly recommend keeping the unit plugged in
at all times to ensure smooth ongoing performance.
62°F - 90°F
(17°C - 32°C)
-13°F - 122°F
(-25°C - 50°C)
32°F - 86°F
(0°C - 30°C)
-13°F - 86°F
(-25°C - 30°C)
50°F - 90°F
(10°C - 32°C)
32°F - 122°F
(0°C - 50°C)
NOTE
Keep the room's relative humidity below 80%. If the air conditioner operates in excess of this,
the surface of the air conditioner may attract condensation. To help prevent condensation
from forming and dripping, set the vertical airflow louver to its maximum angle (vertically to
the floor) and set the fan to HIGH.
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ACCESSORIES
INCLUDED INSTALLATION ACCESSORIES
The air conditioning system comes with the following accessories. They may vary by model.
Accessory Quantity Image Accessory Quantity Image
Manual
Drain Joint
Drain Joint Seal
Refrigerant Pipe
Adapter
(3/8"-1/2")
2
1
1
2-3
Rubber Foot
Transfer
Connector
(1/2"-3/8")
Transfer
Connector
(1/2"-5/8")
Transfer
Connector
(1/4"-3/8")
4
0-2
0-2
0-2
FIELD SUPPLIED INSTALLATION ACCESSORIES
The following installation accessories may be required and must be purchased separately.
• Refrigerant lines
• Indoor and outdoor connection wire
• Outdoor power supply cord
• Drain hose
• Pipe and cable wrapping tape
• Wall hole sleeve and cover
• Putty
• Suspension bolts and necessary hardware to hang indoor unit (if necessary)
• Wiring u-lugs
TOOLS NEEDED
The following tools may be required for installation.
• Phillips screwdriver
• Drill with 2 1/2" or 3 1/2" (indoor unit model depending) core bit
• Vacuum pump
• HVAC manifold gauge set
• Refrigerant leak detector
• Copper pipe cutter
• Flaring tool
• Burr reamer
• Crescent or spanner wrench
• Hexagonal wrench set
• Torque wrench
• Hammer
• Wire strippers
• Wire crimper
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PARTS IDENTIFICATION
DRA2U18M1A
DRA3U28M1A
DRA4U36M1A
DRA5U48M1A
Refrigerant Valves
NOTE
The installation must be performed in accordance with the required local and national
standards. The installation may be slightly different in different areas.
Signal Cable,
Refrigerant Pipes,
Air Inlets
Air Outlet
NOTE
and Drain Pipe
Power
Supply
Wiring Terminal
Illustrations in this manual are for explanatory purposes. The actual shape of your mini-split
equipment may vary slightly. Indoor units may also vary in configuration.
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