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INSTALLATION MANUAL
SLIM DUCTED INDOOR UNIT
DRADL0612F2A, DRADL18F2A
DRADH0912F2A, DRADH18F2A, DRADH24F2A
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.
R
DURASTAR.COM
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Summary of Contents for DURASTAR DRADL0612F2A
- Page 1 SLIM DUCTED INDOOR UNIT DRADL0612F2A, DRADL18F2A DRADH0912F2A, DRADH18F2A, DRADH24F2A 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 10: WRAP PIPES AND CABLE ................32 INDOOR UNIT BTU SETTING (FOR MULTI-ZONE) ..........33 SETTING STATIC PRESSURE ................... 33 FINAL CHECKS ......................... 34 TROUBLESHOOTING ......................35 WIRING DIAGRAM ........................39 ERROR CODES - INDOOR UNIT ..................40 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 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...
- Page 8 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 (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 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...
- Page 13 Composition: R-454B is classified as safety group A2L per ASHRAE Standard 34. Verify that service equipment and instruments are certified for use with group A2L refrigerants, and in particular with R-454B is a non-azeotropic mixture of 68.9% by weight difluorometh ane (HFC- 32) and 31.1 % by weight 2,3,3,3-tetrafluoro-1-propene (HFO-1234yf). DURASTAR.COM...
- Page 14 : the actual refrigerant charge in the system in lbs (kg) : the refrigerant releasable charge in lbs (kg) WARNING: The minimum room area or the minimum room area of conditioned space is based on releasable charge and total system refrigerant charge. DURASTAR.COM...
- Page 15 When the unit detects a refrigerant leak, the minimum airflow of the indoor unit is as follows : Low Static Models Model DRADL0612F2A DRADL0612F2A DRADL0612F2A DRADL18F2A Nominal 294 CFM 294 CFM 353 CFM 588 CFM Air Volume (500 m³/h) (500 m³/h) (600 m³/h)
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Page 16: 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 17: Accessories
Indoor and outdoor connection wire • Outdoor power supply cord • Drain pipe • Pipe and cable wrapping tape • Wall hole sleeve and cover • Putty • Suspension bolts and necessary hardware to hang indoor unit • Wiring u-lugs DURASTAR.COM... -
Page 18: 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 19: Parts Identification
Refrigerant Pipes and Signal Wire Outdoor Unit Air Inlets Signal Cable, Refrigerant Pipes, and Drain Pipe Wiring Terminal Valve Cover Air Outlet NOTE Illustrations in this manual are for explanatory purposes. The actual shape of your mini-split equipment may vary slightly. DURASTAR.COM... -
Page 20: Unit Dimensions
UNIT DIMENSIONS Unit and air outlet dimensions Air inlet dimensions Air filter Model DRADL0612F2A 27 9/16" 7 7/8" 19 15/16" 17 3/4" 6" 21 1/8" 7 5/16" 23 9/16" (700mm) (200mm) (506mm) (450mm) (152mm) (537mm) (186mm) (599mm) DRADL18F2A 34 5/8"... -
Page 21: 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 22: Step 2: Configure The Unit
STEP 2: CONFIGURE THE UNIT All units except for the DRADL0612F2A come with an internal pump. See instructions below for installing the external pump on the DRADL0612F2A if necessary. In addition, this unit can be converted for vertical wall mount installation. Use the following steps to rotate the pump and (if necessary) change the air inlet position. - Page 23 INSTALLING THE EXTERNAL PUMP ON THE DRADL0612F2A: 1. Cut the rubber hose provided to the proper size and use it to connect the drain pipe on the unit (Pipe A) to the pump port inlet port. 2. Attach the pump to the unit.
- Page 24 Unplug the “PUMP” pin CN13 Short connect the “CN5” For units with an external pump (DRADL0612F2A and DRADL18F2A): 1. The pump does not work in the vertical configuration. Remove the pump, unplug CN13 and CN5 from the board and use the jumper provided to short the water sensor plug CN5.
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Page 25: Step 3: Hang Indoor Unit
After the sleeve is inserted through the wall, connect the wall hole sleeve cover to the wall sleeve on the outside end. Make sure the cover is flush with the outside wall. DURASTAR.COM... -
Page 26: Step 5: Duct And Accessories Installation
Refer to the following static pressure guidelines when installing the indoor unit. The static pressure can be adjusted using methods explained later in the manual: Model Static Pressure (in. wc / Pa) DRADL0612F2A 0 - 0.4 / 0 - 100 DRADL18F2A 0 - 0.4 / 0 - 100 DRADH0912F2A 0 - 0.8 / 0 - 200... -
Page 27: Step 6: Connect Drain Pipe
3. Wrap the remaining indoor portion of the drain pipe with foam pipe insulation to prevent condensation. Drain pipe Drain Anti-syphon Vent Drain pipe Pipe clamp Insulation Vent T Angle Down connecting port 1/50 Drain Trap Ceiling 39-59” (990mm- 1500mm) Slope of 1/50 U type tube DURASTAR.COM... - Page 28 5. Pass the drain pipe through the wall hole to the outside. The end of the pipe should be at least 2" (50mm) above the ground. If it touches the ground, the pipe may become blocked. Make sure the water drains to a safe location where it will not cause water damage or a slipping hazard. DURASTAR.COM...
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Page 29: Step 7: Wiring The Indoor Unit
The size of the power supply cable, signal cable, fuse, and switch needed is determined by the maximum current of the unit. The maximum current is indicated on the nameplate located on the side panel of the unit. Refer to this nameplate to choose the right cable, fuse, or switch. DURASTAR.COM... -
Page 30: Connect The Signal Cable
Screw the cable clamp down tightly. 7. Replace the control box lid. 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 31: Step 8: Install Wired Thermostat
3. Press the MANUAL button again to activate FORCED COOLING mode. 4. Press the MANUAL button a third time to turn the unit off. Infrared Timer receiver indicator Manual LED display button Alarm PRE-DEF Operation indicator pre-heating/ indicator defrost indicator DURASTAR.COM... -
Page 32: Step 9: 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 the outdoor unit's installation manual). DURASTAR.COM... -
Page 33: Indoor Unit Btu Setting (For Multi-Zone)
ENC1 Rotary Switch Settings (If Available) Indoor Unit Model Description 6,000 BTU 9,000 BTU 12,000 BTU DRADL0612F2A Low-static Slim-ducted DRADH0912F2A High-static Slim-ducted SETTING STATIC PRESSURE NOTE Before adjusting the static pressure make sure that all diffusers are open and the filter is clean. -
Page 34: Final Checks
4. Press OK to select the desired setting. 5. Press BACK to exit. NOTE Air flow and static pressure charts are available on service.durastar.com or Durastar.com. FINAL CHECKS Along with performing the final checks section of the installation manual, check the following items. -
Page 35: Troubleshooting
The following problems are not a malfunction and in most situations will not require repairs. ISSUE POSSIBLE CAUSES Unit does not turn on The Unit has a 3-minute protection feature that prevents the unit when pressing ON/OFF from overloading. The unit cannot be restarted within three minutes button of being turned off. DURASTAR.COM... - Page 36 • 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 37 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 38 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 39: Wiring Diagram
WIRING DIAGRAM DURASTAR.COM... -
Page 40: Error Codes- Indoor Unit
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) ©2025 Durastar DURASTAR.COM V1.1 0125...
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