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- Page 1 [AlR-HANDLER AIR CONDITIONER Installation Manual SEF3-SG3 Series IMPORTANT NOTE: Read this manual carefully before installing or operating your new air conditioning unit. Make sure to save this manual for future reference.
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Page 3: Read This Manual
CONTENTS ------------------------------------------------------------------------------------------------------------------------------------------------------------ S A FETY PREC A U TI O NS ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- A CCESS O RIES PR U D U CT O V ER V IE W------------------------------------------------------------------------------------------------------------------------------------------------------------------- IN D OO R U NI 丁 INS 丁 A LL A 丁 I O N ----------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------ REFRIGER A N 丁... -
Page 4: Safety Precautions
SAFETY PRECAUTIONS It is really important you read Safety Precautions Before Operation and Installation. Failure to follow the instructions contained in this manual can cause serious damage or injury. The seriousness of potential damage or injuries is classified as either a WARNING or CAUTION. - Page 5 • This appliance shall be installed in accordance with national wiring regulations. Only use the included accessories, parts, and specified parts for installation. • Using non-standard parts can cause water leakage, electrical shock, fire, and can cause the unit to fail. •...
- Page 6 TAKE NOTE OF FUSE SPECIFICATIONS 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, for example : T3.15AL/250V AC, T5AL/250V AC, T3.15A/250V AC, T5A/250V AC, T20A/250V AC, T30A/250VAC,etc.
- Page 7 NOTE The nouns in this section are explained as follows: Mc: The actual refrigerant charge in the system. A: the actual room area where the appliance is installed. Amin: The required minimum room area. Mmax: The allowable maximum refrigerant charge in a room. Qmin: The minimum circulation airflow.
- Page 8 Note: Take the Mc S.Okg as an example. For appliances serving one or more rooms with an air duct system, the room area calculation shall be determined based on the total area of the conditioned space (TA) connected by ducts taking into consideration that the circulating airflow distributed to all the rooms by the appliance integral indoor fan will mix and dilute the leaking refrigerant before entering any room.
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Page 9: Indoor Unit
Model Indoor unit Recommended Outdoor unit SEF3-18- 18K(208/230V) SEF3-18-SG3 CPH3-18CD(O) 24K(208/230V) CPH3-24CD(O) SEF3-24-SG3 30K(208/230V) CPH3-30CD(O) SEF3-30-SG3 36K(208/230V) SEF3-36-SG3 CPH3-36CD(O) 48K(208/230V) SEF3-48-SG3 CPH3-48CD(O) 60K(208/230V) SEF3-60-SG3 CPH3-60CD(O) [ * ,]: For t h is product co m bination, an additional 0.60kg/21.16 oz of refrigerant is required. [ * 2 ]: For t h is product co m bination, an additional 0.65kg/22.93 oz of refrigerant is required. - Page 10 • Installation ( where refrigerant pipes are allowed) - Any person who is involved with working on or breaking into a refrigerant circuit should hold a current valid certificate from an industry-accredited assessment authority, which authorizes their competence to handle refrigerants safely in accordance with an industry recognized assessment specification.
- Page 11 a. The minimum test pressure for the low side of the system shall be the low side design pressure and the minimum test pressure for the high side of the system shall be the high side design pressure, unless the high side of the system can not be isolated from the low side of the system in which case the entire system shall be pressure tested to the low side design pressure.
- Page 12 9. No ignition sources No person carrying out work in relation to a REFRIGERATING SYSTEM which involves exposing any pipe work shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion. All possible ignition sources, including cigarette smoking, should be kept at a sufficient distance from the site of installation, repairing, removing and disposal, during which refrigerant can possibly be released to the surrounding space.
- Page 13 14. Detection of flammable refrigerants Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks. A halide torch(or any other detector using a naked flame) shall not be used. The following leak detection methods are deemed acceptable for refrigerant systems.
- Page 14 16. Charging procedures In addition to conventional charging procedures, the following requirements shall be followed: Works shall be undertaken with appropriate tools only (In case of uncertainty, please consult the manufacturer of the tools for use with flammable refrigerants) Ensure that contamination of different refrigerants does not occur when using charging equipment.
- Page 15 19. Recovery When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice that all refrigerants are removed safely. When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed. Ensure that the correct number of cylinders for holding the total system charge is available.
- Page 16 21. Transportation, marking and storage for units that employ flammable refrigerants a. General The following information is provided for units that employ FLAMMABLE REFRIGERANTS. b. Transport of equipment containing flammable refrigerants Attention is drawn to the fact that additional transportation regulations may exist with respect to equipment containing flammable gas.
- Page 17 ACCESSORIES The air conditioning system comes with the following accessories. Use all of the installation parts and accessories to install the air conditioner. Improper installation may result in water leakage, electrical shock and fire, or equipment failure. ＿ Accessories (Packed with the indoor unit) Name 阰ture 门...
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Page 18: Product Overview
PRODUCT OVERVIEW Up flow/Down flow/Low boy Secondary drain Left flow/Right flow Secondary drain Display window Knock out hole Upper front Fan module panel Left flow/Right flow Primary drain Latches Up flow/Down flow/Low boy Primary drain Coil module Gas refrigerant connection Liquid refrigerant connection Blower assembly Horizontal... -
Page 19: Indoor Unit Installation
INDOOR UNIT INSTALLATION 心 CAUTION Install the indoor and outdoor units, cables and wires at least 3-1/Sft (lm) from televisions or radios to prevent static or image distortion. Depending on the appliances, a 3-1/Sft (lm) distance may not be sufficient. The Indoor unit must be electrically grounded per national and local electrical code. - Page 20 WARNING There must be an airtight seal between the bottom of the air handler and the return air plenum. Use fiberglass sealing strips, foil duct tape, caulking, or equivalent sealing method between the plenum and the air handler cabinet to ensure a tight seal. Return air must not be drawn from a room where this air handler or any gas-fueled appliance (i.e., water heater), or carbon monoxide-producing device (i.e., wood fireplace) is installed.
- Page 21 Vertical installations 问 □ 问 Fixing instructions: When installed vertically (upward or downward), the lower end of the air outlet needs to be connected to the L-shaped metal air duct and fastened by screws If return air is to be ducted,install duct flush with floor. Set unit on floor over opening.
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Page 22: Installation Position Requirements
Lowboy duct size(applied for lowboy application) 晶 。 B (「eference) Inch ;;;,2 2 ;;;, 38-1/2 12-3/4 18K,24K �56 0 � 980 inch ;:: 22 ;:::= 40 15-3/4 30K,36K ;::;;, 1018 �560 inch >22 � 48 19-1/2 48K,60K >56 0 ;;:, 1218 Installation Position Requirements 厂... - Page 23 团 NOTICE FOR DUCT CONNECTIONS: 土 It should be assembled It should be insulated It should be Flexible It should be fabricated accordance to the and use a Vapor Barrier. suspension mounted and installed in instructions. and not fastened accordance with local and/or national codes.
- Page 24 Selection of installation direction Different installation directions The units can be installed in a vertical (down and up)and Horizontal(right and left) configuration. 二 问 NOTICE • For horizontal installation, a secondary drain pan (not Low boy supplied) must be installed. •...
- Page 25 Connecting the wire and pipes (pipes and drainage pipes) Up flow Right flow Please follow these steps to perform installation and installation: Step 1 Remove screws Remove the four screws and open the upper front panel. Step 2 Connect the wires according to the wiring diagram. Step 3 Connect the pipes and install the drainage pipes.
- Page 26 Step 4 Step 5 Indication of the position of each Remove the four screws and open the lower temperature sensor of the evaporator: front panel. 18-24K model Remove screws 36K model Step 6 Unlock the 4 latches. 48-60K model 功...
- Page 27 Step 7 Turn the fan module 180 degree and put it under the coil module. Re-lock the 4 latches. Cut the foam..Remove knockouts as shown in the figure. Fix the wires with two hooks. 畛 Thread the wires Step 8 through the bottom of the drain pan.
- Page 28 Step 9 Relocate the wires in the fan module. Fix the wires with the zip tie of fan housing. 了 麾 ｀ Reconnect the connectors Low boy installations Step 10 Step 1-6 Connect the wire according to the wiring Refer to down flow and horizontal left diagram.
- Page 29 三 Step 8.2 Fix the wires according the picture below if the fan module is on the left side. . Ir p y t （ s e 勾 a st 屿 . ip 、 丿 . WI ． Tl new location Fix the wires with zip ties ( t y pe A) 霆...
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Page 30: Vertical Installations
NOTICE ON PURCHASING PIPES Installation requires pvc pipe or other suitable material per local and national codes, which can be obtained at your local hardware store or dealer. WARNING • After removal of drain pan plug(s), check drain hole(s) to verify that drain opening is fully open and free of any debris. -
Page 31: Refrigerant Piping Connection
REFRIGERANT PIPING CONNECTION WARNING All field piping must be completed by a licensed technician and must comply with the local and national regulations. • When the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration in the room from exceeding the safety limit in the event of refrigerant leakage. -
Page 32: Connection Instructions
Connection Instructions Refrigerant Piping 一 :：n=； :：二怎:::；芯 芯 ::1 : :1：1 aze) 3/Bflare-3/Bbraze Liquid 18K-60K 3/4flare-3/4braze Step 1: Cut pipes Step 2: Remove burrs When preparing refrigerant pipes, take Burrs can affect the air-tight seal of refrigerant piping extra care to cut and flare them properly. connection. - Page 33 • Clamp flare from on the end of the pipe. The end of the pipe must extend beyond the flare form. Flare form Pipe • Place flaring tool onto the form. Torque wrench • Turn the handle of the flaring tool clockwise until the pipe is fully flared.
- Page 34 心CAUTION • Thread this pipeline through the wall and connect it to the outdoor unit. Check to make sure there is no refrigerant • Insulate all the piping, including the valves of leak after completing the installation work. the outdoor unit. If there is a refrigerant leak, ventilate the area immediately and evacuate the system (refer to the Air Evacuation section of this manual).
- Page 35 CONFIRMATION OF INDOOR UNIT Units without electrical heat 尸三 三 BRANCH CIRCUlT Rated ｀忙墙暹 昏衬一 钟 ． current 115V: 4.4A 11 SV: 5.SA 115/208/230V-1 15.0 208/230V: 2.SA 208/2301/: 3.SA 115V: 4.4A 11 SV: 5.SA 115/208/230V-1 15.0 208/230V: 2.SA 208/230V: 3.SA 115V: 6.4A 115V: 8.0A 115/208/230V-1...
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Page 36: Wiring Precautions
WIRING PRECAUTIONS WARNING BEFORE PERFORMING ANY ELECTRICAL WORK, READ THESE WARNINGS. • All wiring must comply with local and national • Do not let wires touch or rest against electrical codes, regulations and must be installed refrigerant tubing, the compressor, or any by a licensed electrician. - Page 37 INDOOR UNIT WIRING 心 CAUTION • While connecting the wires, please strictly follow the wiring diagram. • The refrigerant circuit can become very hot. Keep the interconnection cable away from the copper tube. Step 1: Prepare the cable for connection. WARNING 1.
- Page 38 SPECIFIC WIRING METHODS WARNING Please refer to the wiring nameplate for the wiring method. Do not connect the power cord to the communication line, as this may damage the system. NOTE: For method A & B equipment must have S1 & S2 communication between indoor and outdoor units. Connection method A: Connection method B: Full communication.
- Page 39 。 。 ． ． ． 呈 When using a 24v thermostat, please refer to the non-communicating wiring diagrams that follow: 丘 ＿ 詈 一 Connection method C: 震 The following wiring diagram are suitable for the AHU and ODU with 24V thermostat. 己...
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Page 40: Condensate Overflow Switch
• Wiring for 1 Hand 1 C thermostat Condensate overflow switch: The unit will accommodate a remote condensate overflow switch. To enable, remove jumper J7, and connect the installer provided condensate overflow device to CN23 per below. When an overflow condition is present, the device should open connection signaling the unit to turn off 回回巨］区］匠］巨］... - Page 41 fre sh air or ion ge nerator wiring displ ay 平 平 The control displays unit status as well as any UV,fresh air or active fault codes on the LED display. If the unit 苤 work召 ion generator, etc is functioning normally, the LED will display current temperature setpoint.
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Page 42: Dip Switch Definitions
DIP switch definitions 二 回 BUZ2 固 卿 二 邑 / 器 ： Function Rotar y switch □ 国 勹 勹 恳 ， Function 芯 勹 卧 七 DIP swich ＞ 寸 己 厂 』 丿 Static pressure － 厂 DIP swich KEY1 产... - Page 43 Function DIP switch settings: Function combination table of SWl-1 and SWl-4: The 24V thermostat mode needs to refer Control type IDU and ODU Connection Note to the following settings: Wired |－？\_| controller / (S1+S2) / 24V Auto connection Discovery thermostat Wired S1+S2 Scenario 2...
- Page 44 [Default] Dehum心fication Dehumid巾cation feature is enabled S4-2 DH function selection control not available through thermostat L output 24V or alarm relay close only SW5-3 1,2,3 L or Alarm relay selection [default] L output 24V or alarm relay when refrigerant sensor fault or R454B close when any fault be detected refrigerant leakage be detected R stop ouput 24V when refrigerant...
- Page 45 Air volume table 24V thermostat Wired controller Airflow External Static Electric auxiliary volume Capacity Fan speed Pressure Range heat module DIP Switch 24V terminal engaged DIP Switch Mode (CFM) Cooling Turbo SW3-4=0N Y2/Y Cool Cooling High SW3-4=0FF Y2/Y Cool Cooling Medium Cool Cooling Low Cool...
- Page 46 Air volume table 24V thermostat Wired controller Airflow External Static Electric auxiliary volume Capacity Fan Speed Pressure Range heat module DIP Switch 24V terminal engaged DIP Switch Mode (CFM) SW3-4=0N Y2/Y Cool Cooling Turbo 1235 SW3-4=0FF Y2/Y Cool Cooling High 1147 Cool Cooling Medium...
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Page 47: Air Evacuation
AIR EVACUATION NOTICE When opening valve stems, turn the hexagonal wrench until it hits against the stopper. Do not try to force the valve to open further. Preparations and precautions 6. Close the Low Pressure side of the manifold gauge, and turn off the vacuum pump. 7. -
Page 48: Before Test Run
TEST RUN & CAUTION Failure to perform the test run may result in unit damage, property damage, or personal injury. 5. For the Outdoor Unit Before test run a. Check to see if the refrigeration system is leaking. A test run must be performed after the entire b. - Page 49 24V SIGNAL CHART 24V input terminal 。 。 。 。 。 。 。 。 Mode P的rity Y/Y2 E/AUX Fan speed Display 。 。 。 。 。 。 ＊ 。 。 。 。 。 。 ＊ ＊ Cooling stage 1 。 。...
- Page 52 The design and specifications are subject to change without prior notice for product improvement. Consult with the sales agency or manufacturer for details. Any updates to the manual will be uploaded to the service website, please check for the latest version. 16123100000848 20250430...
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