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. 1 DURASTAR.
TABLE OF CONTENTS TABLE OF CONTENTS..................................................................................................... 2 INTRODUCTION.................................................................................................................. 3 WARNINGS............................................................................................................................ 3 IMPORTANT SAFETY PRECAUTIONS....................................................................
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.
IMPORTANT SAFETY PRECAUTIONS Improper handling can cause serious damage or injury. Please read the following safety information in its entirety.
• • • • • • • • • • • 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.
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.
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.
ACCESSORIES INCLUDED INSTALLATION ACCESSORIES The air conditioning system comes with the following accessories. They may vary by model.
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 Air Inlets Signal Cable, Refrigerant Pipes, and Drain Pipe Power Supply Wiring Terminal Refrigerant Valves Air Outlet NOTE Illustrations in this manual are for explanatory purposes. The actual shape of your minisplit equipment may vary slightly.
OUTDOOR UNIT INSTALLATION Installation Instructions 24” (610) above Install the unit following local codes and regulations. These may differ slightly between regions. 12” ( 30 on le 5) ft 5) ll 30 wa ( ” 12 back m fro 24” ( 6 on ri 10) ght 7) 00 2 ( t ” 79 fron in STEP 1: SELECT INSTALLATION LOCATION Before installing the outdoor unit, you must choose an appropriate location. The following are standards that will help you choose an appropriate location for the unit.
Special considerations for extreme weather If the unit is exposed to heavy wind, install unit so that air outlet fan is at a 90° angle to the direction of the wind. If needed, build a barrier in front of the unit to protect it from extremely heavy winds. See figures below. Strong wind Wind Baffle Strong wind Strong wind If the unit is frequently exposed to heavy rain or snow Build a shelter above the unit to protect it from rain or snow. Be careful not to obstruct airflow around the unit.
STEP 3: MOUNT THE OUTDOOR UNIT Anchoring the Unit The outdoor unit can be anchored to the ground or to a wall-mounted bracket (sold separately) with bolts (M10). Mount the unit on a cement slab, condenser mounting pad, or other level surface able to support the unit's weight. Do not place the unit directly on the ground. If using a wallmounting bracket, make sure the attached structure can support at least four times the unit's weight.
Pipe length and unit height difference maximums 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) 197' (60m) 262' (80m) 262' (80m) Max. length for one indoor unit 82' (25m) 98' (30m) 115' (35m) 115' (35m) Max.
Choose the Correct Size of Cable 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. Prepare the cable and wires for connection: • Using wire strippers, strip the rubber jacket from both ends of cable to reveal about 1.5" (3840mm) of the wires inside.
REFRIGERANT PIPING CONNECTIONS WARNING When connecting refrigerant piping, do not let substances or moisture other than specified refrigerant enter the unit or pipes. The presence of foreign materials will lower the unit's capacity and can cause abnormally high pressure in the refrigeration system. This can result in explosion and personal injury. REFRIGERANT PIPE LENGTH The length of refrigerant piping will affect the performance and efficiency of the unit.
WARNING Do not open valves A-E until you are ready to release the factory refrigerant charge. WARNING After startup, the master valves and all zone valves connected to an IDU must remain open for proper operation. Post start-up and servicing Once the system is operational, the master valves are used to access the entire system for servicing and troubleshooting. If a repair requires the entire refrigerant charge to be removed, the master valves will allow the recovery of all system refrigerant.
If the indoor unit is installed higher than the outdoor unit: Oil may flow back into the outdoor unit's compressor and cause liquid compression. This will lead to deterioration of performance and shorten the life of the compressor. Oil traps in the rising gas piping can prevent this and should be installed every 32'10" (10m) of vertical rise. If the outdoor unit is installed higher than the indoor unit: Proper oil return to the compressor must be maintained with the suction gas velocity.
STEP 3: FLARE PIPE ENDS Proper flaring is essential to achieve an airtight seal. 1. After removing burrs from cut pipe, seal the ends with PVC tape to prevent foreign materials from entering the pipe. 2. Sheath pipe with insulating material. 3. Place flare nuts on both ends of the pipe. Make sure they are facing in the right direction as you cannot change their orientation after flaring. Flare nut Copper pipe 4. Remove PVC tape from ends of pipe when ready to perform flaring. 5.
6. Place flaring tool onto the form. 7. Turn the handle of the flaring tool clockwise until the pipe is fully flared. 8. Remove the flaring tool and flare form, then inspect the pipe for cracks and even flaring. STEP 4: CONNECT PIPES When connecting refrigerant pipes, be careful not to use excessive torque or to deform the piping in any way. You should first connect the low-pressure pipe, then the high-pressure pipe. When bending connective refrigerant piping, the minimum bending radius is 4 inches (10cm).
Outer Diameter of Pipe Inches (mm) Ø 0.25" (6.35mm) Ø 0.375" (9.52mm) Ø 0.5" (12.7mm) Ø 0.63" (16mm) Ø 0.75" (19mm) Tightening Torque Nm (lb-ft) 18~20 (13.3~14.8) 32~39 (23.6~28.8) 49~59 (36.1~43.5) 57~71 (42~52.4) 67~101 (49.4~74.5) Flare Dimension "B" Inches (mm) 0.33~0.34 (8.4~8.7) 0.52~0.53 (13.2~13.5) 0.64~0.65 (16.2~16.5) 0.76~0.78 (19.2~19.7) 0.91~0.93 (23.2~23.7) Flare Shape 90 °± 4 45 ° ±2 B R 0.4~0.8 WARNING Do not use excessive torque.
AIR EVACUATION PREPARATIONS AND PRECAUTIONS Air and foreign matter in the refrigerant system can cause abnormal rises in pressure, which can damage the air conditioner, reduce energy efficiency, and cause injury. 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. BEFORE PERFORMING EVACUATION 1.
NOTE ON ADDING ADDITIONAL REFRIGERANT Some systems require additional refrigerant charging depending on pipe lengths. The standard pipe length is 25' (7.5m). Pipe lengths greater than the standard length will require additional refrigerant. The refrigerant should be charged from the service port on the outdoor unit's low pressure valve. Additional refrigerant can be calculated using the following formula: Liquid Side Ø .25" (6.35mm) Liquid Side Ø .375" (9.
GAS LEAK CHECK POINTS Check-point of indoor unit Check-point of outdoor unit D B C A A: Low pressure stop valve B: High pressure stop valve C & D: Indoor unit flare nuts TEST RUN TEST RUN INSTRUCTIONS You should perform the test run for at least 30 minutes. 1. Connect power to the unit. 2. Press the ON/OFF button on the remote controller or wired thermostat to turn the unit on. 3.
TROUBLESHOOTING SAFETY PRECAUTIONS If ANY of the following conditions occurs, turn off your unit immediately! • The power cord is damaged or abnormally warm • You smell a burning odor • The unit emits loud or abnormal sounds • A power fuse blows or the circuit breaker frequently trips • Water or other objects fall into or out of the unit DO NOT ATTEMPT TO FIX THESE YOURSELF! CONTACT AN AUTHORIZED SERVICE PROVIDER IMMEDIATELY! COMMON ISSUES The following problems are not a malfunction and in most situations
ISSUE POSSIBLE CAUSES Both the indoor unit and Low hissing sound during operation: This is normal and is caused by outdoor unit make noises refrigerant gas flowing through both indoor and outdoor units. Low hissing sound when the system starts, has just stopped running, or is defrosting: This noise is normal and is caused by the refrigerant gas stopping or changing direction.
TROUBLESHOOTING When troubles occur, please check the following points before contacting a repair company.
PROBLEM POSSIBLE CAUSES SOLUTION The unit is not Power failure Wait for the power to be restored working The power is turned off Turn on the power The fuse is burned out Replace the fuse Remote control batteries are dead Replace batteries The Unit’s 3-minute protection has Wait three minutes after restarting the been activated unit Timer is activated Turn timer off Indicator The unit may stop operation or continue to run safely.
WIRING DIAGRAMS DRA2U18M1A 28 DURASTAR.
CN12 CompTop CN29 INDOOR PIPE OUT TEMP CN14 LOW/HIGH CN15 T2B L-OUT CN5 ON(4) OPTIONAL DC FAN V(S) W(C) U(R) COMPRESSOR CN21 L1 L2 1(A) 2(A) 3(A) TO A Y/G BROWN BLUE BLACK BROWN BLUE BLACK 3 1(B) 2(B) 3(B) 1(C) 2(C) 3(C) TO B TO C POWER WHITE L2-IN S-A S-B S-C CN4 CN20 L1-IN CN3 Y/G CN23 CN14 CN25 BLACK 3 REACTOR 6 VALVE-B 6 VALVE-A 6 ELECTRONIC EXPANSIVE VALVE ELECTRONIC EXPANSIVE VALVE ELECTRONIC EXPANSIVE VALVE W P-1 BLUE RED VALVE-C RED P1 P2 OPTIONAL1 4-WA
DRA4U36M1A Notes: Applicable to the units adopting DC motor only FM1 BLACK RED Applicable to the units adopting AC motor only 3 CN55 CN19 BLUE BLUE HEAT_Y CN3 BLUE A CN20 BLACK CN4 CN10 RDE CN51 CN33 CN41 BLACK HEAT_D CN44 RDE OPTIONAL CN52 BLACK RED OUTDOOR DC FAN SV FAN1 OUTDOOR AC FAN T3 CONDENSER TEMPERATURE SENSOR HEAT CRANKCASE HEATING T4 OUTDOOR AMBIENT TEMPERATURE SENSOR H-PRO HIGH PRESSURE SWITCH TH HEATSINK TEMPERATURE SENSOR CN27 FM1 CN28 EXHAUST TEMPERATUR
Y/G 4 1 Ferrite bead CN1 D CN16 Ferrite bead C CN21 CN3 CN6 CH1 W U BLUE RED BLACK Ferrite bead MAIN BOARD V B CN29 Ferrite bead CN20 BLACK CN25 BLACK CN19 FAN1 CN24 CN9 CN18 CH2 CN17 2 CH2 Ferrite bead 3 CN1 CN12 CON1 OLP TEMP.
ERROR CODES - OUTDOOR UNIT DISPLAY E0 EEPROM malfunction E2 Communication malfunction between outdoor and all indoor units E3 Communication malfunction between outdoor main control chip and compressor control chip E4 32 MALFUNCTION & PROTECTION DEFINE Outdoor temp. sensor error (condenser pipe sensor/outdoor ambient sensor /compressor discharge pipe sensor/ Indoor unit coil outlet temp. sensor.
