DURASTAR DRA2U18M1B Installation Manual

Multi-zone outdoor unit

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INSTALLATION MANUAL

MULTI-ZONE OUTDOOR UNIT

SPLIT-STYLE AIR CONDITIONER

DRA2U18M1B, DRA3U28M1B, DRA4U36M1B, DRA5U48M1B

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.

DURASTAR.COM

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Page 1 MULTI-ZONE OUTDOOR UNIT SPLIT-STYLE AIR CONDITIONER DRA2U18M1B, DRA3U28M1B, DRA4U36M1B, DRA5U48M1B 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...
Page 2: Table Of Contents
STEP 2: REMOVE BURRS ..................... 17 STEP 3: FLARE PIPE ENDS ..................18 STEP 4: CONNECT PIPES ..................... 19 SYSTEM EVACUATION ....................20 FINAL CHECKS ........................22 TEST RUN ..........................23 TROUBLESHOOTING .....................24 WIRING DIAGRAMS ......................28 ERROR AND OPERATING CODES ................32 JOB SITE INFORMATION SHEET ................33 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 over-current 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...
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
• Wire strippers • HVAC manifold gauge set • Wire crimper • Micron Gauge • Multimeter • Refrigerant leak detector • Electroprobe • Copper pipe cutter • Level • Flaring tool • Burr reamer • Crescent or spanner wrench DURASTAR.COM...
Page 9: Parts Identification
WARNING When installing a Multi-zone outdoor unit, a minimum of 2 associated indoor units must be installed and operational for the system to operate properly. DRA5U48M1B DRA4U36M1B DRA3U28M1B DRA2U18M1B 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) DRA2U18M1B - 35 1/16” x 26 1/2” x 13 7/16” (890 x 673 x 342) 26 1/8” (663) 13 15/16” (354) 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. DRA2U18M1B DRA3U24M1B DRA4U36M1B DRA5U48M1B 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...
Page 15: Refrigerant Piping Connections
Perform leak check procedures. Afterwards, remove the high side hose and attach the low side hose from the manifold to evacuate all connected zones. 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 indoor unit is installed higher than the the outdoor unit is installed higher than the outdoor unit. indoor unit. DURASTAR.COM...
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
0.04" (1.0mm) 0.07" (1.8mm) Ø 5/8" (15.9mm) 0.078" (2.0mm) 0.086" (2.2mm) Ø 3/4" (19.1mm) 0.078" (2.0mm) 0.094" (2.4mm) Flare form TIP: THICKNESS COMPARISON • 0.0275" = A Thumbnail • 0.04" = A Dime • 0.078" = A Nickle 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: System Evacuation
Use a vacuum pump and manifold gauge to evacuate the refrigerant system, removing any non-condensible gas and moisture from the system. Evacuation should be performed upon initial installation and if unit is relocated. DURASTAR.COM...
Page 21 Do not try to force the valves to open further. 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: Final Checks
The refrigerant should be charged from the service port on the outdoor unit's low pressure valve. Additional refrigerant information can be found in the SUBMITTALS DOCUMENTS at WWW.SERVICE.DURASTAR.COM. Additional refrigerant can be calculated using the following formula: Liquid Side Ø 1/4" (6.35mm) Liquid Side Ø...
Page 23: Test Run
A: Low pressure stop valve B: High pressure stop valve C & D: Indoor unit ﬂare nuts Use the Durastar Job Site Information Sheet at the end of this manual as a commissioning report to record your start up readings. TEST RUN TEST RUN INSTRUCTIONS You should perform the test run for at least 30 minutes.
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: Wiring Diagrams
WIRING DIAGRAMS DRA2U18M1B COMP TOP 5(8) Dotted line indicates this component is optional. Your conﬁguration many vary. 16022000035644 DURASTAR.COM...
Page 29 DRA3U28M1B Dotted line indicates this component is optional. Your conﬁguration many vary. 16022300002514 DURASTAR.COM...
Page 30 DRA4U36M1B Dotted line indicates this component is optional. Your conﬁguration many vary. 16022300002633 DURASTAR.COM...
Page 31 DRA5U48M1B IPM&PFC BOARD MAIN CONTROL BOARD INDOOR COIL OUTLET TEMP.SENSOR Dotted line indicates this component is optional. Your conﬁguration many vary. 16022000036851 DURASTAR.COM...
Page 32: Error And Operating Codes
High temperature protection of Evaporator PH91 Low temperature protection of Evaporator LC06 High temperature protection of Inverter module (IPM) Note: DF (defrost) and FC (forced cooling) are normal operating codes, not malfunctions. [ ] Applicable to some units only. DURASTAR.COM...
Page 33: Job Site Information Sheet
Line Voltage (Power Off): L1 to L2 _____________ L1 to G _____________ L2 to G ________________ Line Voltage (Power On): L1 to L2 _____________ L1 to G _____________ L2 to G ________________ Outdoor Thermal Readings Discharge: _________°F Ambient: _________°F DURASTAR.COM...
Page 34 (Circle Liquid and Gas Line): Electrical Readings Power/Control Wire Color: 1 _______________ 2 _______________ 3 ________________ Voltage Readings: 1-2 ___________ AC 2-3 ___________DC Thermal Readings Return Air: _________°F Supply Air: _________°F Room Air: _________°F Gas Line Saturation: _________°F Liquid Line Saturation: _________°F DURASTAR.COM...
Page 35 (Circle Liquid and Gas Line): Electrical Readings Power/Control Wire Color: 1 _______________ 2 _______________ 3 ________________ Voltage Readings: 1-2 ___________ AC 2-3 ___________DC Thermal Readings Return Air: _________°F Supply Air: _________°F Room Air: _________°F Gas Line Saturation: _________°F Liquid Line Saturation: _________°F DURASTAR.COM...
Page 36 (Circle Liquid and Gas Line): Electrical Readings Power/Control Wire Color: 1 _______________ 2 _______________ 3 ________________ Voltage Readings: 1-2 ___________ AC 2-3 ___________DC Thermal Readings Return Air: _________°F Supply Air: _________°F Room Air: _________°F Gas Line Saturation: _________°F Liquid Line Saturation: _________°F DURASTAR.COM...
Page 37 NOTES: DURASTAR.COM...

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Dra3u28m1b Dra4u36m1b Dra5u48m1b

DURASTAR DRA2U18M1B Installation Manual

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