DURASTAR DRA2U18M1A Installation Manual
Multi-zone outdoor unit split-style air conditioner
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- Owner's manual (16 pages) ,
- Service manual (185 pages) ,
- Installation manual (7 pages)
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INSTALLATION MANUAL
MULTI-ZONE OUTDOOR UNIT
SPLIT-STYLE AIR CONDITIONER
DRA2U18M1A, DRA3U28M1A, DRA4U36M1A, DRA5U48M1A
Model Number:
Serial Number:
Purchase Date:
Installing Contractor Company Name:
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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
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Summary of Contents for DURASTAR DRA2U18M1A
- Page 1 MULTI-ZONE OUTDOOR UNIT SPLIT-STYLE AIR CONDITIONER DRA2U18M1A, DRA3U28M1A, DRA4U36M1A, DRA5U48M1A Model Number: Serial Number: Purchase Date: Installing Contractor Company Name: Capture relevant information about your Durastar mini-split equipment before it is installed and write it above for future reference. DURASTAR.COM...
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Page 2: Table Of Contents
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 DURASTAR.COM... -
Page 3: Introduction
• 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. -
Page 4: Important Safety Precautions
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. DURASTAR.COM... - Page 5 • 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. DURASTAR.COM...
- Page 6 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. DURASTAR.COM...
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Page 7: Operating Temperatures
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. -
Page 8: Accessories
• 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 DURASTAR.COM... -
Page 9: Parts Identification
PARTS IDENTIFICATION NOTE The installation must be performed in accordance with the required local and national standards. The installation may be slightly different in different areas. DRA5U48M1A DRA4U36M1A DRA3U28M1A DRA2U18M1A Signal Cable, Refrigerant Pipes, and Drain Pipe Air Inlets Power Supply... -
Page 10: Outdoor Unit Installation
Near animals or plants that will be harmed by hot air discharge. • Near any source of combustible gas. • In a location that is exposed to large amounts of dust. • In a location exposed to an excessive amount of salty air. DURASTAR.COM... -
Page 11: Step 2: Install The Drain Joint
Seal Seal Drain joint NOTE In cold climates, make sure that the drain hose is as vertical as possible to ensure swift water drainage. If water drains too slowly, it can freeze in the hose and flood the unit. DURASTAR.COM... -
Page 12: Step 3: Mount The Outdoor Unit
Outdoor Unit - Dimensions W x H x D inches (mm) Dist. A inches (mm) Dist. B inches (mm) DRA2U18M1A - 33 1/4”x27 5/8”x14 5/16” (845x702x363) 21 1/4” (540) 13 3/4” (350) DRA3U28M1A - 37 1/4”x31 7/8”x16 1/8” (946x810x410) 26 1/2” (673) 15 7/8”... -
Page 13: Step 4: Connect The Signal And Power Cables
When installing multiple indoor units with a single outdoor unit, ensure that the length of the refrigerant pipe and the drop height between the outdoor and indoor units, and between indoor units, meets the requirements below. DRA2U18M1A DRA3U24M1A DRA4U36M1A DRA5U48M1A Max. length for all rooms 131' (40m) - Page 14 8. Replace the wire cover on the side of the unit, and screw it in place. Terminal block Connecting cable Power supply cord Conduit panel Wire Cover Select the appropriate holes to feed the wires through according to their diameter. DURASTAR.COM...
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Page 15: Refrigerant Piping Connections
If installing two 24,000 BTU indoor units, only connect the units with the valve ports labeled "A" and "B" on the outdoor unit. Refrigerant connecting pipe sizes for indoor units Indoor Unit capacity Liquid (Btu/h) 1/4” 3/8” 12K &18K 1/4” 1/2” 3/8” 5/8” “A” and “B” valve ports. DRA5U48M1A shown. DURASTAR.COM... - Page 16 Indoor Unit 19’ 9” (6m) 32’ 10” (10m) Required distance between oil traps when Required distance between oil traps when the outdoor unit is installed higher than the the indoor unit is installed higher than the indoor unit. outdoor unit. DURASTAR.COM...
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Page 17: Step 1: Cut Pipes
Burrs can affect the airtight seal of the refrigerant piping connection and must be completely removed. 1. Hold the pipe at a downward angle to prevent burrs from falling into the pipe. 2. Using a reamer or deburring tool, remove all burrs from the cut section of the pipe. Pipe Reamer Point downward DURASTAR.COM... -
Page 18: Step 3: Flare Pipe Ends
Inches (mm) Ø 0.25" (6.35mm) 0.0275" (0.7mm) 0.05" (1.3mm) Ø 0.375" (9.52mm) 0.04" (1.0mm) 0.063" (1.6mm) Ø 0.5" (12.7mm) 0.04" (1.0mm) 0.07" (1.8mm) Ø 0.63" (16mm) 0.078" (2.0mm) 0.086" (2.2mm) Ø 0.75" (19mm) 0.078" (2.0mm) 0.094" (2.4mm) Flare form Pipe DURASTAR.COM... -
Page 19: Step 4: Connect Pipes
4. While firmly gripping the nut on the unit tubing, use a torque wrench to tighten the flare nut according to the torque values in the table on the next page. Loosen the flaring nut slightly, then tighten again. DURASTAR.COM... - Page 20 5. While firmly gripping the body of the valve, use a torque wrench to tighten the flare nut according to the correct torque values in the table above. 6. Loosen the flare nut slightly, then tighten again. 7. Repeat steps 3-6 for the remaining pipe. Valve cover DURASTAR.COM...
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Page 21: Air Evacuation
Do not try to force the valves to open further. 14. Replace all valve caps and tighten by hand. Manifold Gauge Low pressure Flare nut gauge Low pressure High pressure valve valve Low pressure hose Auxiliary hose Vacuum pump Valve body Valve stem Low pressure valve DURASTAR.COM... -
Page 22: Electrical And Gas Leak Checks
1. Soap and Water Method - Using a soft brush, apply a soapy water or liquid detergent to all pipe connection points on the indoor and outdoor unit. The presence of bubbles indicates a leak. 2. Leak Detector Method - If using a leak detector, refer to the device's operation manual for proper usage instructions. DURASTAR.COM... -
Page 23: Test Run
5. Double check all pipe connections. During operation, the pressure of the refrigerant system will increase. This may reveal leaks that were not present during the initial leak check. Take time during the test run to recheck all pipe connection points. Refer to Gas Leak Check section for instructions. DURASTAR.COM... -
Page 24: Troubleshooting
The indoor unit makes A rushing air sound may occur when the louver resets its position. noises A squeaking sound may occur after running the unit in HEAT mode due to expansion and contraction of the unit’s plastic parts. DURASTAR.COM... - Page 25 • Press ON/OFF button on remote control to restart operation. NOTE If problem persists, contact a local dealer or your nearest customer service center. Provide them with a detailed description of the unit malfunction as well as your model number. DURASTAR.COM...
- Page 26 Incompressible gas or moisture has Evacuate and recharge the system with quently entered the system refrigerant The compressor is broken Replace the compressor The voltage is too high or too low Install a manostat to regulate the voltage DURASTAR.COM...
- Page 27 If not, disconnect the power, then connect it again. Turn the unit on. appears If the problem persists, disconnect the power and contact your nearest customer service center. NOTE If your problem persists after performing the checks and diagnostics above, turn off your unit immediately and contact an authorized service center. DURASTAR.COM...
- Page 28 ©2021 Durastar DURASTAR.COM V1.0 0221...
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