Gree GMV-24WL/C-T Owner's Manual
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Gree GMV-24WL/C-T Owner's Manual

Gree GMV-24WL/C-T Owner's Manual

Dc inverter multi vrf system
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Owner's Manual
Original Instructions
Commercial Air Conditioners
DC Inverter Multi VRF System
Models:
GMV-24WL/C-T(U)
GMV-28WL/C-T(U)

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Summary of Contents for Gree GMV-24WL/C-T

  • Page 1 Owner's Manual Original Instructions Commercial Air Conditioners DC Inverter Multi VRF System Models: GMV-24WL/C-T(U) GMV-28WL/C-T(U)
  • Page 2 Preface For correct installation and operation, please read all instructions carefully. Before reading the instructions, please be aware of the following items: This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.
  • Page 3 Exception Clauses Manufacturer will bear no responsibilities when personal injury or property loss is caused by the following reasons: Damage the product due to improper use or misuse of the product. Alter, change, maintain or use the product with other equipment without abiding by the instruction manual of manufacturer.

  • Page 4: Table Of Contents

    Contents 1 Safety Precautions..................... 1 2 Product Introduction ....................2 2.1 Names of Main Parts ......................2 2.2 Combinations of Indoor and Outdoor Units ............... 2 2.3 Operating Range ......................2 3 Preparation before Installation ................. 2 3.1 Standard Parts ........................3 3.2 Installation Site .........................

  • Page 5: Safety Precautions

    (27) If anything abnormal happens (such as burning smell), please power off the unit and cut off the main power supply, and then immediately contact Gree appointed service center. If abnormality keeps going, the unit might be damaged and lead to electric shock or fire.

  • Page 6: Product Introduction

    DC Inverter Multi VRF System 2 Product Introduction Gree Multi VRF System adopts inverter compressor technology. By changing the displacement of compressor, stepless capacity regulation within range of 10%~100% can be realized. Various product lineups are provided with capacity range from 7kW to 8kW, which can be widely used in residential, commercial and working area and especially applicable to places with big load change.

  • Page 7: Standard Parts

    Corrugated pipe Chassis gluey plug Drainage joint Tube Connector GMV-24WL/C-T(U) Sub-assy GMV-28WL/C-T(U) Some accessories are not available for some models. Please refer to the present product for details. 3.2 Installation Site The unit must be installed where strong there is a danger the weight of the unit and fixed securely, otherwise the unit would topple or fall off.

  • Page 8: Piping Work Requirements

    DC Inverter Multi VRF System If the ODU is totally surrounded by walls, please refer to the following figures for space dimension: Fig. 2 3.3 Piping Work Requirements Refer to the table below for piping work requirements: R410A Refrigerant System Outer diameter (mm/inch) Wall thickness (mm/inch) Φ6.35 (1/4)

  • Page 9: Connection Pipe

    DC Inverter Multi VRF System Unit: mm/inch Model GMV-24WL/C-T(U) GMV-28WL/C-T(U) (38-6/19) (14-3/16) (31-2/16) (25-3/5) (15-5/9) 4.2 Connection Pipe 4.2.1 Schematic Diagram of Piping Connection Fig.4 4.2.2 Allowable Length and Height Difference of Connection Pipe Y type branch joint is adopted to connect indoor and outdoor units. Connecting method is shown in the figure below: Equivalent length of one Y-type branch is 0.5m(1-5/8feet).
  • Page 10 DC Inverter Multi VRF System Fig.5 Allowable Length and Height Difference of Connection Pipe Piping parameters of GMV-24WL/C-T(U), GMV-28WL/C-T(U). Allowable value Fitting pipe feet Total length (actual length) of fitting pipe L1+L2+L3+a+b+c+d Actual length Length of farthest fitting pipe (m)
  • Page 11 DC Inverter Multi VRF System Dimension of outdoor connection pipe. Pipe dimension Basic module Gas pipe (mm/inch) Liquid pipe (mm/inch) GMV-24WL/C-T(U) Φ15.9(5/8) Φ9.52(3/8) GMV-28WL/C-T(U) Φ15.9(5/8) Φ9.52(3/8) 4.2.4 Selection of Indoor Branches Select indoor branches according to the total capacity of downstream indoor units. If the capacity exceeds that of the outdoor unit, capacity of outdoor unit prevails.

  • Page 12: Installation Of Connection Pipe

    DC Inverter Multi VRF System Total capacity of downstream indoor units C (kW) Gas pipe (mm/inch) Liquid pipe (mm/inch) C≤5.6 Φ12.7(1/2) Φ6.35(1/4) 5.6<C≤14.2 Φ15.9(5/8) Φ9.52(3/8) 14.2<C≤22.4 Φ19.05(1/4) Φ9.52(3/8) 4.2.6 Dimension of Pipe between Indoor Branch and IDU Dimension of pipe between indoor branch and IDU should be consistent with the dimension of indoor pipe.
  • Page 13 DC Inverter Multi VRF System 4.3.2 Flaring Process Use pipe cutter to cut the connection pipe in case it is unshaped. Keep the pipe downward in case cutting scraps get into the pipe. Clear away the burrs after cutting. Remove the flared nut connecting indoor connection pipe and outdoor unit. Then use flaring tool to fix the flared nut into the pipe (as shown in Fig.10).
  • Page 14 During engineering installation, the connection pipe inside the unit must be wrapped by insulation sleeve. Below is the piping diagram of GMV-24WL/C-T(U), GMV-28WL/C-T(U). According to customer requirement or space limit, outlet pipe can be installed from the front, right or rear side.
  • Page 15 DC Inverter Multi VRF System proper dimension and remove burrs as well. See Fig.17. Y-type branch must be installed vertically or horizontally. Fig. 17 Branch shall be isolated by insulating material that can bear 120°C(248°F) or even higher temperature. The attached foam of branch cannot be taken as insulating material. 4.3.7 Thermal Insulation for Pipeline For multi VRF system, every copper pipe should be labeled so as to avoid misconnection.

  • Page 16: Vacuum Pumping, Refrigerant Adding

    Fig. 19 4.4.2 Refrigerant Adding Refrigerant quantity of outdoor unit before delivery: Model GMV-24WL/C-T(U), GMV-28WL/C-T(U) Refrigerant Qty (kg) The refrigerant amount charged before delivery doesn’t include the amount that needs to be added to indoor units and the connection pipeline.
  • Page 17 DC Inverter Multi VRF System Quantity of additional refrigerant per meter for liquid pipe (kg/m)/(oz/inch) Φ22.2(Φ7/8) Φ19.05(Φ3/4) Φ15.9(Φ5/8) Φ12.7(Φ1/2) Φ9.52(Φ3/8) Φ6.35(Φ1/4) 0.35 0.25 0.17 0.11 0.054 0.022 0.314 0.224 0.152 0.099 0.048 0.020 First confirm that there is no leakage from the system. When compressor is not working, charge additional R410A with specific amount to the unit through the filling opening of the liquid pipe valve of the outdoor unit.

  • Page 18: Electric Wiring

    Details of type and rating for fuse: Model: GMV-24WL/C-T(U), GMV-28WL/C-T(U). Ceramic 250V5A (front main board), ceramic 250V30A (front main board). Connect the unit to specialized grounding device and make sure it is securely grounded. It’s a must to install air switch and current circuit breaker that can cut off the power of the entire system.
  • Page 19 4.5.2 Wiring Diagram Connection of power cord and communication wire Separate power supply for IDU and ODU Single-phase power supply unit. GMV-24WL/C-T(U), GMV-28WL/C-T(U): Fig.21 Connection of power cord and communication wire for IDU and ODU Selection of circuit breaker and power cord.

  • Page 20: Check Items After Installation And Test Operation

    DC Inverter Multi VRF System Fig. 22 Engineering Wiring View of GMV-24WL/C-T(U), GMV-28WL/C-T(U) 5 Check Items after Installation and Test Operation 5.1 Check Items after Installation Check items Possible conditions due to improper installation Check Each part of the unit is installed securely? Unit may drop, shake or emit noise.

  • Page 21: Test Operation And Debugging

    DC Inverter Multi VRF System 5.2 Test Operation and Debugging After finishing the first installation or replacing the main board of outdoor unit, it is necessary to perform test operation and debugging. Otherwise, unit won’t be able to work. Test operation and debugging must be performed by professional technicians or under the guidance of professional technicians.
  • Page 22 DC Inverter Multi VRF System 5.2.2 Test Operation and Debugging Description of test operation procedures and main board display of ODU. Description of each stage of debugging progress —— Debugging code Code meaning and operation method Progress Code Display status System is not debugged, hold main board’s SW3 button for 5s 01_Set master to start debugging.
  • Page 23 DC Inverter Multi VRF System Description of each stage of debugging progress —— Debugging code Code meaning and operation method Progress Code Display status System detects error on indoor components. XX means the project code of IDU with error, e.g. no.1 IDU has d5 and d6 errors, meanwhile no.3 IDU displays error d6 and d7, then the 07/XX/error Display...
  • Page 24 DC Inverter Multi VRF System Description of each stage of debugging progress —— Debugging code Code meaning and operation method Progress Code Display status Debugging for cooling mode. If no malfunction occurs for Display 50min when compressor is running, then the system is 15/AC 15_ Cooling circularly...

  • Page 25: Common Malfunctions And Troubleshooting

    If there is abnormal condition (e.g. unpleasant smell), turn unit off and disconnect power immediately. Then contact Gree authorized service center. If unit continues operation despite the abnormal condition, it may get damaged and lead to electric shock or fire hazard.
  • Page 26 Too many heat resources in the room. Reduce heat resources. Filter is blocked and dirty. Clean the filter. If problem cannot be solved after checking the above items, please contact Gree service center and describe the cases and models. Following circumstances are not malfunctions. Malfunction...

  • Page 27: Error Indication

    DC Inverter Multi VRF System 7 Error Indication Inquiry method of error indication: combine division symbol and content symbol to check the corresponding error. Indoor: Error Code Content Error Code Content Malfunction of IDU (uniform) Indoor PCB is poor Malfunction of ambient temperature Protection of indoor fan sensor Malfunction of entry-tube temperature...
  • Page 28 DC Inverter Multi VRF System Error Code Content Error Code Content Driving board of compressor operates Driving board of fan operates abnormally (uniform) abnormally (uniform) Voltage protection of driving board Voltage protection of driving board power of compressor (uniform) power of fan (uniform) Reset protection of driving module of Reset protection of driving module of compressor...

  • Page 29: Maintenance And Care

    DC Inverter Multi VRF System Status: Error Code Content Error Code Content Debugging confirmation when starting Unit waiting for debugging up the unit Inquiry of compressor operation Long-distance emergency stop parameters Refrigerant recovery operation of Emergency stop of operation after-sales Defrosting Limit operation Oil-return...

  • Page 30: Drain Pipe

    Otherwise, it may lead to danger. Use nitrogen or refrigerant to conduct the tests. 9 After-sales Service If there’s quality defect or other problems in the product, please contact Gree local after-sales service department for help. Warranty must be based on the following conditions: Product’s initial startup must be performed by professional technicians from Gree service...

This manual is also suitable for:

Gmv-24wl/c-tuGmv-28wl/c-tGmv-28wl/c-tu

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