Fujitsu GENERAL AUXG18KRLB Design & Technical Manual
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Fujitsu GENERAL AUXG18KRLB Design & Technical Manual

Fujitsu GENERAL AUXG18KRLB Design & Technical Manual

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AIR CONDITIONER
Cassette type
DESIGN & TECHNICAL MANUAL
INDOOR
OUTDOOR
AUXG18KRLB
AUXG22KRLB
AOHG18KBTB
AOHG22KBTB
DR_AU021EG_05
2023.02.28

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Summary of Contents for Fujitsu GENERAL AUXG18KRLB

  • Page 1 AIR CONDITIONER Cassette type DESIGN & TECHNICAL MANUAL INDOOR AUXG18KRLB AUXG22KRLB OUTDOOR AOHG18KBTB AOHG22KBTB DR_AU021EG_05 2023.02.28...
  • Page 2 • Product specifications and design are subject to change without notice for future improvement. • For further details, please check with our authorized dealer. Trademarks ™ FGLair is trademark of Fujitsu General Limited in the United States, other countries or both. ™ Google Play is trademark of Google LLC. ®...

  • Page 3: Table Of Contents

    CONTENTS Part 1. INDOOR UNIT................1 1. Specifications....................2 2. Dimensions....................4 2-1. Models: AUXG18KRLB and AUXG22KRLB ..............4 2-2. Installation space requirement ..................5 3. Wiring diagram ....................7 3-1. Models: AUXG18KRLB and AUXG22KRLB ..............7 4. Capacity table....................8 4-1. Cooling capacity.......................8 4-2. Heating capacity ......................9 5.
  • Page 4 CONTENTS (continued) Part 2. OUTDOOR UNIT..............47 1. Specifications....................48 2. Dimensions....................49 2-1. Models: AOHG18KBTB and AOHG22KBTB..............49 3. Installation space ..................50 3-1. Models: AOHG18KBTB and AOHG22KBTB..............50 4. Refrigerant circuit ..................53 4-1. Model: AOHG18KBTB ....................53 4-2. Model: AOHG22KBTB ....................54 5. Wiring diagrams ..................55 5-1.

  • Page 5: Part 1. Indoor Unit

    Part 1. INDOOR UNIT CASSETTE TYPE: AUXG18KRLB AUXG22KRLB...

  • Page 6: Specifications

    1. Specifications Cassette Type Inverter heat pump Model name AUXG18KRLB AUXG22KRLB Power supply 230 V ~ 50 Hz Power supply intake Outdoor unit Available voltage range 198—264 V Rated Btu/h 17,700 20,500 Cooling 0.90—5.90 0.90—6.70 Min.—Max. Btu/h 3,100—20,100 3,100—22,900 Capacity Rated Btu/h 20,500...
  • Page 7 Specifications for ErP Lot10 Model name AUXG18KRLB AUXG22KRLB Cooling Energy efficiency class Heating (Average) Cooling 5.2 (35°C) 6.0 (35°C) Pdesign Heating (Average) 4.4 (-10°C) 4.8 (-10°C) SEER Cooling 7.00 7.00 kWh/kWh SCOP Heating (Average) 4.30 4.40 Annual energy consumption kWh/a QHE (Average) 1,431 1,527...

  • Page 8: Dimensions

    2. Dimensions 2-1. Models: AUXG18KRLB and AUXG22KRLB Unit: mm Hanging bolt position Drain hose View A Ceiling Wire hole Fresh air inlet (cut out) Ø95 View B View C 4 × Ø3.2 hole - 4 - 2-1. Models: AUXG18KRLB and AUXG22KRLB 2.

  • Page 9: Installation Space Requirement

    2-2. Installation space requirement Provide sufficient installation space for product safety. • For 4-direction setting: Unit: mm Strong and durable ceiling 256 or more 1,500 3,000 or more or more Ceiling height Ceiling mode* “Low” : 2.7 m or less Ceiling mode “Standard”...
  • Page 10 • Human sensor (Option) NOTE: A separate device capable of controlling the human sensor (energy saving) function, such as the Touch Panel Controller, is required for use. Top view Drain Refrigerant pipe pipe Human sensor Example of sensitivity range: 3,200 8,800 Ceiling height 3,200 mm...

  • Page 11: Wiring Diagram

    3. Wiring diagram 3-1. Models: AUXG18KRLB and AUXG22KRLB - 7 - 3-1. Models: AUXG18KRLB and AUXG22KRLB 3. Wiring diagram...

  • Page 12: Capacity Table

    4. Capacity table Capacity tables show each of following values calculated based on the outdoor temperature and the indoor temperature, under given Airflow Rate (AFR): For cooling capacity: Total Capacity (TC), Sensible Heat Capacity (SHC), and Input Power (IP) For heating capacity: Total Capacity (TC) and Input Power (IP) 4-1.

  • Page 13: Heating Capacity

    4-2. Heating capacity NOTE: Values mentioned in the table are calculated based on the maximum capacity. ¢ Model: AUXG18KRLB 1,050 Indoor temperature °CDB °CDB °CWB 5.05 1.66 4.93 1.70 4.81 1.73 4.69 1.76 4.57 1.80 5.69 1.77 5.56 1.80 5.42 1.84 5.28 1.88...

  • Page 14: Fan Performance

    5. Fan performance 5-1. Air velocity distributions ¢ Model: AUXG18KRLB (4-way air outlet) Fan speed Operation mode Measuring conditions HIGH Unit: m/s 0.25 Top view 0.25 Horizontal louver: position 1 Unit: m/s 0.25 0.25 Side view Horizontal louver: position 1 Unit: m/s Side view Horizontal louver: position 2...
  • Page 15 ¢ Model: AUXG22KRLB (4-way air outlet) Fan speed Operation mode Measuring conditions HIGH Unit: m/s 0.25 Top view 0.25 Horizontal louver: position 1 Unit: m/s 0.25 0.25 Side view Horizontal louver: position 1 Unit: m/s Side view Horizontal louver: position 2 0.25 0.25 Unit: m/s...
  • Page 16 ¢ Model: AUXG18KRLB (3-way air outlet) Fan speed Operation mode Measuring conditions HIGH Unit: m/s Top view 0.25 Horizontal louver: position 1 0.25 Unit: m/s 0.25 0.25 Side view Horizontal louver: position 1 Unit: m/s Side view Horizontal louver: position 2 0.25 0.25 Unit: m/s...
  • Page 17 ¢ Model: AUXG22KRLB (3-way air outlet) Fan speed Operation mode Measuring conditions HIGH Unit: m/s Top view 0.25 Horizontal louver: position 1 0.25 Unit: m/s 0.25 0.25 Side view Horizontal louver: position 1 Unit: m/s Side view Horizontal louver: position 2 0.25 0.25 Unit: m/s...

  • Page 18: Airflow

    5-2. Airflow ¢ Models: AUXG18KRLB and AUXG22KRLB (4-way air outlet)  Cooling/Heating Fan speed Airflow 1,050 HIGH QUIET ¢ Models: AUXG18KRLB and AUXG22KRLB (3-way air outlet)  Cooling/Heating Fan speed Airflow HIGH QUIET - 14 - 5-2. Airflow 5. Fan performance...

  • Page 19: Fresh-Air Characteristics

    5-3. Fresh-air characteristics ¢ Airflow volume: static pressure of fresh-air intake characteristics Duct (inside diameter: ø 95 mm) Duct fan Static pressure required to take in fresh-air Airflow (m ¢ Installation Flexible duct *2 Fan *2 Flexible duct *2 Duct flange *2 Fresh-air inlet position Insulation *1 *1: In case of fresh-air intake, remove the insulation.
  • Page 20 ¢ Air-outlet duct connection  Precautions • Connect the air-outlet duct to maximum 2 directions among the 4-duct connecting directions. CAUTION Do not connect ducts at 3 or more directions. • When installing air-outlet duct in 2 directions, connect the ducts in a straight line. Air-outlet duct Close Close...
  • Page 21  Models: AUXG18KRLB and AUXG22KRLB Fan Speed Quiet 1-way Fan Speed Fan Speed Fan Speed High 1-way Quiet 2-way High 2-way L= 10 m L= 5 m L= 1 m Airflow (m /min) - 17 - 5-3. Fresh-air characteristics 5. Fan performance...

  • Page 22: Operation Noise (Sound Pressure)

    6. Operation noise (sound pressure) 6-1. Noise level curve ¢ Models: AUXG18KRLB and AUXG22KRLB  Cooling  Heating NC-65 NC-65 NC-60 NC-60 NC-55 NC-55 NC-50 NC-50 HIGH NC-45 NC-45 HIGH NC-40 NC-40 NC-35 NC-35 NC-30 NC-30 NC-25 NC-25 NC-20 NC-20 QUIET QUIET NC-15...

  • Page 23: Sound Level Check Point

    6-2. Sound level check point Microphone 1.5 m Microphone NOTE: Detailed shape of the actual indoor unit might be slightly different from the one illustrated above. - 19 - 6-2. Sound level check point 6. Operation noise (sound pressure)

  • Page 24: Safety Devices

    7. Safety devices Model Type of protection Protection form AUXG18KRLB AUXG22KRLB Circuit protection Current fuse (PCB*) 250 V, 3.15 A 125 ± 10 °C Activate Fan motor stop Thermal protection Fan motor protection program 120 ± 10 °C Reset Fan motor restart *: Printed Circuit Board - 20 - 7.

  • Page 25: External Input And Output

    8. External input and output Rotary switch CN65 CN47 (Ext.in/out PCB) (Ext.out) Terminal (Ext.in) Fig. Indoor unit PCB Fig. External input and output PCB Connecting point Input/Output Function Input select Input signal Operation/Stop Terminal Input Dry contact Edge Forced stop Operation/Stop Error status Indoor unit...

  • Page 26: External Input

    8-1. External input • “Operation/Stop” mode or "Forced stop" mode can be selected with function setting of indoor unit. • A twisted pair cable should be used. Maximum length of cable is 150 m. • Use an external input and output cable with appropriate external dimension, depending on the number of cables to be installed.
  • Page 27 ¢ Input signal type • Indoor unit Input signal type is only "Edge". Edge • External Input and Output PCB The input signal type can be selected. Signal type (edge or pulse) can be switched by the DIP switch 2 (SW2) on the External Input and Output PCB.

  • Page 28: External Output

    8-2. External output Use an external output cable with appropriate external dimension, depending on the number of ca- bles to be installed. ¢ Indoor unit • A twisted pair cable (22 AWG) should be used. Maximum length of cable is 25 m. •...

  • Page 29: Setting Of External Input And Output

    8-3. Setting of external input and output • Indoor unit Input Connection point Function setting number 46 Function Operation/Stop mode 1 (Setting prohibited) Terminal Forced stop mode Operation/Stop mode 2 Output Connection point Function setting number 60 Function Operation/Stop 01 to 08 (Setting prohibited) CN47 Error status...

  • Page 30: Details Of Control Input Function

    8-4. Details of control input function ¢ Operation/Stop mode 1 • In the case of "Edge" input External Input and Output PCB Function External input Input signal Command setting Rotary switch Off → On Operation — Input of indoor unit Terminal On →...
  • Page 31 ¢ Forced stop • In the case of "Edge" input External Input and Output PCB Function External input Input signal Command setting Rotary switch Forced stop Off → On (R.C. disabled) — Input of indoor unit Terminal Normal On → Off (R.C.
  • Page 32 ¢ Operation/Stop mode 2 • In the case of "Edge" input External Input and Output PCB Function External input Input signal Command setting Rotary switch Operation Off → On (R.C. enabled) — Input of indoor unit Terminal Stop On → Off (R.C.
  • Page 33 ¢ Forced thermostat off External Input and Output External input Input signal Command Rotary switch Off → On Thermostat off External Input and 2, B, C, D Ex IN 1 Output PCB On → Off Normal operation Ex IN 1 Compressor Room temp.

  • Page 34: Details Of Control Output Function

    8-5. Details of control output function ¢ Operation status External Input and Function Output PCB External output Output signal Status setting Rotary switch Off → On Operation 60-00 — Output of indoor unit CN47 On → Off Stop Off → On Operation External Input and —...
  • Page 35 ¢ Indoor unit fan operation status External Input and Function Output PCB External output Output signal Status setting Rotary switch Off → On Fan run 60-10 — Output of indoor unit CN47 On → Off Fan stop Off → On Fan run External Input and —...
  • Page 36 ¢ External heater output External Input and Function Output PCB External output Output signal Control setting Rotary switch Off → On Heater on 60-11 — Output of indoor unit CN47 On → Off Heater off Off → On Heater on External Input and —...

  • Page 37: Function Settings

    9. Function settings To adjust the functions of this product according to the installation environment, various types of function settings are available. NOTE: Incorrect settings can cause a product malfunction. 9-1. Function settings on indoor unit By using some components on the PCB, you can change the function settings. ¢...
  • Page 38 ¢ DIP switch setting • SW100: Remote controller address setting NOTE: Because this setting is normally done automatically when 2-core wired remote con- troller is installed, setting is unnecessary. Multiple indoor units can be operated by using one wired remote controller. Set the unit number of each indoor unit.

  • Page 39: Function Settings By Using Remote Controller

    9-2. Function settings by using remote controller Some function settings can be changed on the remote controller. After confirming the setting proce- dure and the content of each function setting, select appropriate functions for your installation envi- ronment. ¢ Setting procedure by using remote controller Remote controller is not attached for this product.
  • Page 40 2) Ceiling height Select the appropriate ceiling height according to the place of installation. Function number Setting value Setting description Factory setting Standard ♦ High ceiling Low ceiling For the specific height for each setting value, refer to “Installation space” in Chapter 2. "Dimensions"...
  • Page 41 5) Room temperature control for indoor unit sensor Depending on the installed environment, correction of the room temperature sensor may be re- quired. Select the appropriate control setting according to the installed environment. The temperature of the room temperature sensor is corrected as follows: Corrected temp.
  • Page 42 6) Room temperature control for wired remote controller sensor Depending on the installed environment, correction of the wire remote temperature sensor may be required. Select the appropriate control setting according to the installed environment. To change this setting, set Function 42 to Both “01”. Ensure that the Thermo Sensor icon is displayed on the remote controller screen.
  • Page 43 9) Remote controller custom code (Only for wireless remote controller) The indoor unit custom code can be changed. Select the appropriate custom code. Function number Setting value Setting description Factory setting ♦ 10) External input control "Operation/Stop" mode or "Forced stop" mode can be selected. Function number Setting value Setting description...
  • Page 44 13) Switching functions for external output terminal Functions of the external output terminal can be switched. For details, refer to “External input and output”. Function number Setting value Setting description Factory setting Operation status ♦ 01—08 (Setting prohibited) Error status Indoor unit fan operation status External heater - 40 -...

  • Page 45: Accessories

    10. Accessories 10-1. Models: AUXG18KRLB and AUXG22KRLB Part name Exterior Q’ty Part name Exterior Q’ty Operating manual Insulation Operating manual Drain hose (CD-ROM) Installation manual Hose band Drain hose heat Template (Carton top) insulation Washer Cable tie (large) Coupler heat insulation Cable tie (small) (large) Coupler heat insulation...

  • Page 46: Optional Parts

    11. Optional parts 11-1. Controllers Exterior Part name Model name Summary Easy finger touch operation with LCD Wired Remote panel. Backlit LCD enables easy UTY-RNRGZ* Controller operation in a dark room. Wire type: Non-polar 2-wire High visibility and easy operation. Room temperature can be accurately Wired Remote UTY-RLRG...

  • Page 47: 11-2.Cassette Grille

    Exterior Part name Model name Summary IR Receiver Kit with Wireless Unit control is performed by Wireless UTY-LBTGC1 Remote Remote Controller. Controller NOTE: Available functions may differ by the remote controller. For details, refer to the operation manual. 11-2. Cassette grille Exterior Part name Model name...

  • Page 48: 11-3.Others

    11-3. Others Exterior Part name Model name Summary Human Sensor UTY-SHZXC For circular flow cassette type. Use to connect with various peripheral devices and air conditioner PCB. External UTY-XWZXZG Connect Kit For control output port. Connecting point: CN47 on Main PCB Air Outlet Installed at the air outlet when 3- UTR-YDZK...
  • Page 49 Exterior Part name Model name Summary Remotely manage an air conditioning system using mobile devices such as smartphones and tablets. For connection indoor unit with UART interface. WLAN Adapter UTY-TFSXZ1 Appropriate application for each region is required to use this option. For details, contact FGL sales company.
  • Page 50 - 46 - 11-3. Others 11. Optional parts...

  • Page 51: Part 2. Outdoor Unit

    Part 2. OUTDOOR UNIT SINGLE TYPE: AOHG18KBTB AOHG22KBTB...

  • Page 52: Specifications

    1. Specifications Type Inverter heat pump Model name AOHG18KBTB AOHG22KBTB Power supply 230 V ~ 50 Hz Available voltage range 198—264 V Starting current Cooling 2,160 2,240 Airflow rate Heating 1,830 1,960 Type × Q'ty Propeller fan × 1 Motor output Cooling Sound pressure level *1 dB (A)

  • Page 53: Dimensions

    2. Dimensions 2-1. Models: AOHG18KBTB and AOHG22KBTB Unit: mm 4-M10 hole Pitch of bolts for installation Top view Side view Front view Side view Airflow Drain port Ø42 Bottom view Side view (Valve part) - 49 - 2-1. Models: AOHG18KBTB and AOHG22KBTB 2.

  • Page 54: Installation Space

    3. Installation space 3-1. Models: AOHG18KBTB and AOHG22KBTB ¢ Space requirement Provide sufficient installation space for product safety. CAUTION Keep the space shown in the installation examples. If the installation is not performed accordingly, it could cause a short circuit and result in a lack of operating performance.
  • Page 55  Multiple outdoor unit installation • Provide at least 250 mm of space between the outdoor units if multiple units are installed. • When routing the piping from the side of an outdoor unit, provide space for piping. • No more than 3 units must be installed side by side. When 4 units or more are arranged in a line, provide the space as shown in the following ex- ample “When an obstruction in the upper space:”.
  • Page 56  Outdoor units installation in multi-row Unit: mm Single parallel unit arrangement Multiple parallel unit arrangement 100 or more 200 or more 1,000 or more 2,000 or more 200 or more 400 or more 500 or more 1,000 or more 200 or more 250 or more 1,000 or more...

  • Page 57: Refrigerant Circuit

    4. Refrigerant circuit 4-1. Model: AOHG18KBTB Heat exchanger 3-way (INDOOR) valve 2-way valve Muffler Muffler Strainer 4-way valve Expansion valve Accumulator Heat exchanger Strainer (OUTDOOR) Cooling Heating : Thermistor (Discharge temperature) : Thermistor (Heat exchanger middle temperature) : Thermistor (Outdoor temperature) : Thermistor (Heat exchanger out temperature) : Thermistor (Pipe temperature) : Thermistor (Room temperature)

  • Page 58: Model: Aohg22Kbtb

    4-2. Model: AOHG22KBTB Heat exchanger 3-way (INDOOR) valve 2-way Muffler valve Muffler Pressure switch 4-way valve Strainer Expansion valve Accumulator Heat exchanger Strainer (OUTDOOR) Cooling Heating : Thermistor (Compressor temperature) : Thermistor (Discharge temperature) : Thermistor (Outdoor temperature) : Thermistor (Heat exchanger out temperature) : Thermistor (Heat exchanger middle temperature) : Thermistor (Room temperature) : Thermistor (Pipe temperature)

  • Page 59: Wiring Diagrams

    5. Wiring diagrams 5-1. Model: AOHG18KBTB - 55 - 5-1. Model: AOHG18KBTB 5. Wiring diagrams...

  • Page 60: Model: Aohg22Kbtb

    5-2. Model: AOHG22KBTB - 56 - 5-2. Model: AOHG22KBTB 5. Wiring diagrams...

  • Page 61: Capacity Compensation Rate For Pipe Length And Height Difference

    6. Capacity compensation rate for pipe length and height difference Height difference H Indoor unit is higher than outdoor unit Indoor unit is lower than outdoor unit Outdoor unit Indoor unit Outdoor unit Indoor unit Connection pipe Connection pipe 6-1. Model: AOHG18KBTB NOTE: Values mentioned in the table are calculated based on the maximum capacity.

  • Page 62: Model: Aohg22Kbtb

    6-2. Model: AOHG22KBTB NOTE: Values mentioned in the table are calculated based on the maximum capacity. Pipe length (m) COOLING — — — — 0.909 0.909 0.903 — — — 0.953 0.950 0.947 0.941 Indoor unit is higher — — 0.983 0.968 0.966...

  • Page 63: Additional Charge Calculation

    7. Additional charge calculation 7-1. Model: AOHG18KBTB Refrigerant type Refrigerant amount 1,020 ¢ Refrigerant charge Total pipe length 20 or less 30 (Max.) 20 g/m Additional charge 7-2. Model: AOHG22KBTB Refrigerant type Refrigerant amount 1,250 ¢ Refrigerant charge Total pipe length 20 or less 30 (Max.) 20 g/m...

  • Page 64: Airflow

    8. Airflow 8-1. Model: AOHG18KBTB  Cooling 2,160 1,271  Heating 1,830 1,077 8-2. Model: AOHG22KBTB  Cooling 2,240 1,318  Heating 1,960 1,154 - 60 - 8-1. Model: AOHG18KBTB 8. Airflow...

  • Page 65: Operation Noise (Sound Pressure)

    9. Operation noise (sound pressure) 9-1. Noise level curve ¢ Model: AOHG18KBTB  Cooling  Heating NC-65 NC-65 NC-60 NC-60 NC-55 NC-55 NC-50 NC-50 NC-45 NC-45 NC-40 NC-40 NC-35 NC-35 NC-30 NC-30 NC-25 NC-25 NC-20 NC-20 NC-15 NC-15 1,000 2,000 4,000 8,000 1,000...

  • Page 66: Sound Level Check Point

    9-2. Sound level check point Rear Microphone Microphone Airflow Side view Rear view NOTE: Detailed shape of the actual outdoor unit might be slightly different from the one illustrated above. - 62 - 9-2. Sound level check point 9. Operation noise (sound pressure)

  • Page 67: Electrical Characteristics

    10. Electrical characteristics Model name AOHG18KBTB AOHG22KBTB Voltage 230 ~ Power supply Frequency Max operating current *1 12.1 12.6 Starting current Circuit breaker current Wiring Power cable spec. Cross-sectional area Connection cable *3 Limited wiring length *1: Maximum operating current is the total current of the indoor unit and the outdoor unit. *2: Selected sample based on Japan Electrotechnical Standards and Codes Committee E0005.

  • Page 68: Safety Devices

    11. Safety devices Model Type of Protection form protection AOHG18KBTB AOHG22KBTB 250 V, 25 A Circuit Current fuse (Main PCB) 250 V, 5 A protection 250 V, 3.15 A 125±10 °C Activate Fan motor stop Fan motor Terminal protection protection program 120±10 °C Reset...

  • Page 69: Accessories

    12. Accessories 12-1. Models: AOHG18KBTB and AOHG22KBTB Part name Exterior Part name Exterior Installation manual Drain pipe - 65 - 12-1. Models: AOHG18KBTB and AOHG22KBTB 12. Accessories...

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