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INSTALLATION MANUAL
FLOOR/CEILING INDOOR UNIT
DRAF18F2A, DRAF24F2A
R-454B, 208/230V, 1ph 60HZ
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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Summary of Contents for DURASTAR DRAF18F2A
- Page 1 INSTALLATION MANUAL FLOOR/CEILING INDOOR UNIT DRAF18F2A, DRAF24F2A R-454B, 208/230V, 1ph 60HZ 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 3: DRILL WALL HOLE FOR CONNECTIVE PIPING ......24 STEP 4: CONNECT DRAIN PIPE ................24 STEP 5: CONNECT SIGNAL CABLE ...............25 STEP 6: PREPARE REFRIGERANT PIPING ............27 STEP 7: WRAP PIPES AND CABLE ................27 TROUBLESHOOTING .....................28 WIRING DIAGRAM ......................32 ERROR CODES - INDOOR UNIT ................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 operate your air conditioner in a wet room such as a bathroom or laundry room. Too much exposure to water can cause electrical components to short circuit. • If the air conditioner is used together with burners or other heating devices, thoroughly ventilate the room to avoid oxygen deficiency. DURASTAR.COM... -
Page 5: Electrical Safety
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. DURASTAR.COM... - Page 6 When the refrigerant sensor malfunctions, the indoor unit will display the error code “FHCC”. The refrigerant sensor can not be repaired and can only be replaced by the manufacturer. It shall only be replaced with the sensor specified by the manufacturer. DURASTAR.COM...
- Page 7 All training shall follow the ANNEX HH requirements of UL 60335-2-40 4th Edition. Examples for such working procedures are: • breaking into the refrigerating circuit; • opening of sealed components; • opening of ventilated enclosures. DURASTAR.COM...
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Page 8: Work Procedure
Where electrical components are being changed, they shall be fit for the purpose and to the correct specification. At all times the manufacturer’s maintenance and service guidelines shall be followed. If in doubt consult the manufacturer’s technical department for assistance. The following checks shall be applied to installations using FLAMMABLE REFRIGERANTS: DURASTAR.COM... -
Page 9: Detection Of Flammable Refrigerants
(25 % maximum) is confirmed. • Leak detection fluids are also suitable for use with most refrigerants but the use of detergents containing chlorine shall be avoided as the chlorine may react with the refrigerant and corrode the copper pipe-work. DURASTAR.COM... -
Page 10: Charging Procedures
Prior to recharging the system it shall be pressure tested with OXYGEN FREE NITROGEN • (OFN). The system shall be leak tested on completion of charging but prior to commissioning. • A follow up leak test shall be carried out prior to leaving the site. DURASTAR.COM... - Page 11 If in doubt, the manufacturer should be consulted. In addition, a set of calibrated weighing scales shall be available and in good working order. Hoses shall be complete with leak-free disconnect couplings and in good condition. DURASTAR.COM...
- Page 12 The effectiveness of signs should not be diminished by too many signs being placed together. Any pictograms used should be as simple as possible and contain only essential details. Disposal of equipment using flammable refrigerants: See national regulations. Storage of equipment/appliances: The storage of the appliance should be in accordance with DURASTAR.COM...
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Page 13: Additional Precautions
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 , for example : T3.15AL/250VAC, T5AL/250VAC, T3.15A/250VAC, T5A/250VAC, T20A/250VAC, T30A/250VAC, etc. Note Only a blast-proof ceramic fuse can be used. DURASTAR.COM... - Page 14 WARNING: The minimum room area or the minimum room area of conditioned space is based on releasable charge and total system refrigerant charge. When the unit detects a refrigerant leak, the minimum airflow of the indoor unit is as follows : Model DRAF18F2A DRAF24F2A Nominal Air Volume 577 CFM (980 m³/h) 736 CFM (1250 m³/h)
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Page 15: 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 -22°F (-30°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 16: Accessories
Indoor and outdoor connection wire • Outdoor power supply cord • Drain pipe • Pipe and cable wrapping tape • Wall hole sleeve and cover • Putty • Wiring u-lugs • Suspension bolts and necessary hardware to hang indoor unit (if ceiling mounted) DURASTAR.COM... -
Page 17: Tools Needed
• Electro-probe • Copper pipe cutter • Level • Phillips screwdriver • Hammer • Drill with 2 1/2" or 3 1/2" (indoor unit model • Wire strippers depending) core bit • Wire crimper • Flaring tool • Burr reamer DURASTAR.COM... -
Page 18: Parts Identification
Air inlet (with air filter in it) Remote controller Outdoor unit Refrigerant piping (purchased separately) Remote controller holder NOTE Illustrations in this manual are for explanatory purposes. The actual shape of your mini-split equipment may vary slightly. DURASTAR.COM... -
Page 19: Installation Overview - Indoor Unit
INSTALLATION OVERVIEW - INDOOR UNIT Install the indoor unit Install the drain pipe Install the outdoor unit Evacuate and charge the Connect the refrigerant Connect the wires refrigeration system pipes Perform a test run DURASTAR.COM... -
Page 20: Indoor Unit Installation
If there is no pre-existing refrigerant piping, when choosing a location, leave ample room for a wall hole (see Step 3: Drill Wall Hole for Connective Piping) for the signal cable and refrigerant piping that connect the indoor and outdoor units. DURASTAR.COM... -
Page 21: Step 2: Mount Indoor Unit
Drain port Refrigerant pipe connections D - inch (mm) E - inch (mm) A - inch (mm) B - inch (mm) C - inch (mm) 42 1/16” (1068mm) 26 9/16” (675mm) 9 1/4” (235mm) 38 11/16” (983mm) 8 11/16” (220mm) DURASTAR.COM... -
Page 22: Ceiling Mounting
Liquid pipe connection Gas pipe connection Drain port Downward slope ≥1/100 WARNING Ensure that the drain slope has a gradient of 1/100 or greater. Improper installation can cause the drain pipe to back up into the unit and water leaks. DURASTAR.COM... -
Page 23: Floor Mounting
PIPING/WIRING FROM THE SIDE 1. Rubber plugs and a conduit hole cover are provided to cover unnecessary holes if the piping and wiring come in from the side of the unit. As seen below. Conduit hole cover Rubber plugs DURASTAR.COM... -
Page 24: Step 3: Drill Wall Hole For Connective Piping
Make sure it secured tightly and can not be easily pulled loose. 2. Insulate the connecting port and pipe with the accessory sheath provided. Drain pipe Drain Pipe Model Inner Diameter DRAF18F2A 1” (25mm) DRAF24F2A 1” (25mm) Drain pipe Insulation... -
Page 25: Step 5: Connect Signal Cable
Before performing any electrical or wiring work, turn off the main power to the system. 208/230V~60Hz Power Supply L1 L2 INDOOR OUTDOOR Main Indoor Unit Signal High Power to Signal High Power Supply Power Supply UNIT Indoor Unit UNIT Voltage Voltage 208/230V 208/230V 208/230V DURASTAR.COM... -
Page 26: Cable Sizing
Screw the cable clamp down tightly. 7. Replace the control box lid. Wire outlet Control box Wiring diagram WARNING All wiring must be performed strictly in accordance with the wiring diagram located on the inside of the control box lid. DURASTAR.COM... -
Page 27: Step 6: Prepare Refrigerant Piping
When wrapping the bundle, keep the ends of the piping unwrapped. You need to access them to test for leaks at the end of the installation process (refer to Electrical and Gas Leak Checks section of your outdoor unit's installation manual). DURASTAR.COM... -
Page 28: 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 29 • 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 30 Incompressible gas or moisture has Evacuate and recharge the system with frequently 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 31 5 to 6 minutes before stopping. You can also press any button on the remote controller to stop the buzzer. The unit will go into Turbo to mitigate the leak. Check connections and perform a leak test as described in the outdoor unit installation manual. DURASTAR.COM...
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Page 32: Wiring Diagram
WIRING DIAGRAM DURASTAR.COM... -
Page 33: Error Codes - Indoor Unit
Refrigerant sensor error PC00 ODU IPM module protection PC01 ODU voltage protection PC02 Compressor top (or IPM) temp. protection PC03 Pressure protection (low or high pressure) PC04 Inverter compressor drive error PC0L Low ambient temperature protection ---- IDUs mode conflict (Multi-zone) DURASTAR.COM... - Page 34 THIS PAGE INTENTIONALLY LEFT BLANK. DURASTAR.COM...
- Page 35 THIS PAGE INTENTIONALLY LEFT BLANK. DURASTAR.COM...
- Page 36 THIS PAGE INTENTIONALLY LEFT BLANK. ©2025 Durastar DURASTAR.COM V1.1 0125...
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