Gree GMV-72WM/B-U Owner's Manual
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Gree GMV-72WM/B-U Owner's Manual

Gree GMV-72WM/B-U Owner's Manual

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Owner's Manual
Original Instructions
Commercial Air Conditioners
GMV DC Inverter VRF
Models:
GMV-72WM/B-U(U)
GMV-96WM/B-U(U)
GMV-120WM/B-U(U)
......
GMV-360WM/B-U(U)

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Summary of Contents for Gree GMV-72WM/B-U

  • Page 1 Owner's Manual Original Instructions Commercial Air Conditioners GMV DC Inverter VRF Models: GMV-72WM/B-U(U) GMV-96WM/B-U(U) GMV-120WM/B-U(U) …… GMV-360WM/B-U(U)
  • Page 2 Preface Gree DC Inverter Multi VRF System, with the most advanced technologies in the world, uses eco-friendly refrigerant R410A as its cooling medium. For correct installation and operation, please read this manual carefully. This is the safety alert symbol. It is used to alert you to potential personal injury hazards.
  • Page 3 Exception Clauses Manufacturer will bear no responsibilities when personal injury or property loss is caused by the following reasons: (1) Damage the product due to improper use or misuse of the product; (2) Alter, change, maintain or use the product with other equipment without abiding by the instruction manual of manufacturer;...
  • Page 4 Contents 1 Safety Precautions..................... 1 2 Product Introduction ....................2 2.1 Names of Main Parts ......................2 2.2 Combinations of Outdoor Units ..................2 2.3 Combinations of Indoor and Outdoor Units ............... 3 2.4 The Range of Production Working Temperature ............... 3 3 Preparation before Installation .................

  • 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

    GMV DC Inverter VRF GREE will not assume responsibility of personal injury or equipment damage caused by improper installation and commission, unnecessary service and incapable of following the rules and instructions listed in this manual. 2 Product Introduction Gree Multi VRF Modular System adopts inverter compressor technology. According to change the displacement of compressor, stepless capacity regulation within range of 10%-100% can be realized.

  • Page 7: Combinations Of Indoor And Outdoor Units

    GMV DC Inverter VRF 2.3 Combinations of Indoor and Outdoor Units Max number of Max number of ODU Model ODU Model connectable IDU (unit) connectable IDU (unit) GMV-72WM/B-U(U) GMV-240WM/B-U(U) GMV-96WM/B-U(U) GMV-264WM/B-U(U) GMV-120WM/B-U(U) GMV-288WM/B-U(U) GMV-144WM/B-U(U) GMV-312WM/B-U(U) GMV-336WM/B-U(U) GMV-168WM/B-U(U) GMV-192WM/B-U(U) GMV-360WM/B-U(U) GMV-216WM/B-U(U) —...

  • Page 8: Preparation Before Installation

    3 Preparation before Installation The picture is only used for reference and the actual product prevails. Unspecified measure unit is mm(inch). 3.1 Standard Parts Please use the following standard parts supplied by Gree. Parts for Outdoor Unit Number Name Picture...
  • Page 9 GMV DC Inverter VRF 3.2.1.2 Space dimension for dual-module unit Unit: mm(inch) Fig.3.2.2 3.2.1.3 Space dimension for three-module unit Unit: mm(inch) Fig.3.2.3...
  • Page 10 GMV DC Inverter VRF 3.2.2 Space requirement for the top of outdoor unit When there is wall (or similar obstruction) above the unit, keep the distance between the unit top and the wall at least 3000mm(118-1/8inch) or above. When the unit is located in a totally open space with no obstructions in four directions, keep the distance between the unit top and wall at least 1500mm(59inch) or above (See Fig.3.2.4).
  • Page 11 GMV DC Inverter VRF Fig.3.2.7 3.2.4 Considering the seasonal wind in outdoor unit installation Anti-monsoon installation requirement for unit not connecting exhaust duct Fig.3.2.8 Fig.3.2.9...

  • Page 12: Piping Work Requirements

    GMV DC Inverter VRF Anti-monsoon installation requirement for unit connecting exhaust duct Fig.3.2.10 3.2.5 Considering snow in outdoor unit installation Fig.3.2.11 3.3 Piping Work Requirements There should be no fall among outdoor modules. Refer to the table below for piping work requirements.

  • Page 13: Physical Dimension Of The Outdoor Unit And Mounting Hole

    C. If the air conditioner is installed on the roof, check the intensity of the building and take waterproof measures. D. If a u-steel foundation is adopted, the structure must be designed with sufficient rigidity and strength. Unit: mm(inch) Fig.4.1 4.2 Physical Dimension of the Outdoor Unit and Mounting Hole Outline and Physical Dimension of GMV-72WM/B-U(U).
  • Page 14 GMV DC Inverter VRF Unit: mm(inch) Fig.4.2.1 Outline and Physical Dimension of GMV-96WM/B-U(U) and GMV-120WM/B-U(U). Unit: mm(inch) Fig.4.2.2...

  • Page 15: Connection Pipe

    GMV DC Inverter VRF 4.3 Connection Pipe 4.3.1 Schematic Diagram of Piping Connection Fig.4.3.1...
  • Page 16 GMV DC Inverter VRF 4.3.2 Schematic Diagram of Piping Sequence GMV-72WM/B-U(U) Fig.4.3.2 GMV-96WM/B-U(U) and GMV-120WM/B-U(U). Fig.4.3.3 4.3.3 Allowable pipe length and drop height among indoor and outdoor units Y type branch joint is adopted to connect indoor and outdoor units. Connecting method is shown in the figure below.
  • Page 17 GMV DC Inverter VRF Unit: m(ft.) Fig.4.3.4 L10: Length from the first branch to the farthest IDU; L11: Length from the first branch to the nearest IDU; Equivalent length of branch of IDU is 0.5m(1-3/4inch). Allowable Value R410A Refrigerant System Fitting Pipe m(ft.) ≤1000(3280-3/4)
  • Page 18 Outdoor Model Gas pipe size mm(inch) Liquid pipe size mm(inch) GMV-72WM/B-U(U) No need to enlarge pipe size No need to enlarge pipe size Φ12.7(1/2) GMV-96WM/B-U(U) No need to enlarge pipe size Φ15.9(5/8)
  • Page 19 Fig.4.3.7 Pipe size of basic outdoor module is shown as follows: Pipe between ODU and the first branch of IDU Basic Module Gas Pipe mm(inch) Liquid Pipe mm(inch) Φ19.05(3/4) Φ9.52(3/8) GMV-72WM/B-U(U) Φ22.2(7/8) Φ9.52(3/8) GMV-96WM/B-U(U) Φ28.6(1-1/8) Φ12.7(1/2) GMV-120WM/B-U(U)
  • Page 20 Pipe size of basic outdoor module is shown as follows: Fig.4.3.8 Pipe between module and branch of ODU Basic Module Gas Pipe mm(inch) Liquid Pipe mm(inch) Φ19.05(3/4) Φ9.52(3/8) GMV-72WM/B-U(U) Φ22.2(7/8) Φ9.52(3/8) GMV-96WM/B-U(U) Φ28.6(1-1/8) Φ12.7(1/2) GMV-120WM/B-U(U) Select the branch of outdoor module...
  • Page 21 Fig.4.3.10 Pipe between ODU and the first branch of IDU Basic Module Gas Pipe mm(inch) Liquid Pipe mm(inch) Φ19.05(3/4) Φ9.52(3/8) GMV-72WM/B-U(U) Φ22.2(7/8) Φ9.52(3/8) GMV-96WM/B-U(U) Φ28.6(1-1/8) Φ12.7(1/2) GMV-120WM/B-U(U) For multiple modules, the piping from ODU to the first branch of IDU is based on the total rated capacity of outdoor modules.
  • Page 22 GMV DC Inverter VRF Pipe between ODU and the first branch of IDU Total rated capacity of outdoor modules (multi-modular system) Gas pipe size mm(inch) Liquid pipe size mm(inch) Φ28.6(1-1/8) Φ12.7(1/2) GMV-144WM/B-U(U) Φ28.6(1-1/8) Φ15.9(5/8) GMV-168WM/B-U(U) Φ28.6(1-1/8) Φ15.9(5/8) GMV-192WM/B-U(U) Φ28.6(1-1/8) Φ15.9(5/8) GMV-216WM/B-U(U) Ф34.9(1-3/8) Φ15.9(5/8)
  • Page 23 GMV DC Inverter VRF 4.3.5.6 Fitting pipe between manifolds Pipe size (between two manifolds at indoor unit side) is based on the total capacity of upstream indoor unit(s). Fig.4.3.13 Dimension of the pipe of indoor branch Total capacity of downstream indoor unit(s) C(Btu/h) Gas Pipe mm(inch) Liquid Pipe mm(inch)

  • Page 24: Installation Of The Connection Pipe

    GMV DC Inverter VRF 4.4 Installation of the Connection Pipe 4.4.1 Precautions when installing the connection pipe Before welding the pipeline sealing cap, please make sure there’s no refrigerant in pipeline. If welding it directly, it may cause unnecessary property damage or personal injury. (1) Before welding pipes and sealing caps, please release the residual pressure in the pipes.
  • Page 25 GMV DC Inverter VRF 4.4.2 Manifold (1) Y-type manifold, See the Fig.4.4.2 (a). T-type manifold, See the Fig.4.4.2(b). Fig. 4.4.2(a) Fig.4.4.2(b) (2) Manifold has several pipe sections with different pipe size, which facilitates to match with various copper pipe. Use pipe cutter to cut in the middle of the pipe section with different pipe size and deburr as well.
  • Page 26 GMV DC Inverter VRF Fig.4.4.4(b) (4) Manifold is isolated by insulating material that can bear 120ºC(248°F)or higher temperature. Manifold attached foam cannot be taken as insulating material. 4.4.3 Installation and thermal insulation for pipeline (1) For multi VRF system, every copper pipe should be labelled so as to avoid misconnection. (2) Manifolds can be laid in the following ways: The length of a straight pipe between two manifolds cannot be less than 500 mm (19-11/16inch).
  • Page 27 GMV DC Inverter VRF (3) There must be three fixing point for both horizontal and vertical installation of the Y-type manifold. See Fig.4.4.6. Fixing point 1: 100mm(4inch) on the main inlet manifold from the welding point Fixing point 2: 200mm(7-7/8inch) on the main branched pipe from the welding point Fixing point 3: 250mm(9-5/6inch) on the branched pipe from the welding point Unit: mm(inch) Fig.4.4.6...

  • Page 28: Air Purging And Refrigerant Charge

    GMV DC Inverter VRF (5) Thermal insulation for pipeline 1) To avoid condensate or water leakage on connecting pipe, the gas pipe and liquid pipe must be wrapped with thermal insulating material and adhesive pipe for insulation from the air. 2) For heat pump unit, liquid pipe should bear 70ºC(158°F) or above, and gas pipe should bear 120ºC(248°F) or above.

  • Page 29: Additional Refrigerant Charging

    GMV DC Inverter VRF Fig.4.5.1 Fig.4.5.2 4.5.2 Additional refrigerant charging Outdoor unit has been charged refrigerant before delivery. Charge additional refrigerant for field-installed connecting pipe. If the pipeline is longer than 1m(39-3/8inch), please refer to the following table for charging amount of refrigerant (Liquid pipe prevails).
  • Page 30 GMV DC Inverter VRF (2) ∑Refrigerant charging amount B of every module. Refrigerant charging amount B of every module Rated Capacity(kBtu/h) kg(Pounds) IDU/ODU rated capacity Quantity of included collocation ratio C IDUs(N) N<4 50%≤C≤90% N≥4 0.5(1.1) 0.5(1.1) 0.5(1.1) N<4 1(2.2) 1(2.2) 1.5(3.3) 90%<C≤105%...
  • Page 31 GMV DC Inverter VRF liquid pipe valve of the outdoor unit. If required additional refrigerant cannot be quickly filled for increase of pressure in the pipe, set the unit at cooling startup and then fill the refrigerant from gas valve of outdoor unit. If ambient temperature is low, the unit can’t be set to cooling mode but heating mode.

  • Page 32: Electric Wiring

    Refer to the following table for outdoor unit power cord specifications and circuit breakers. Minimum Circuit Maximum Overcurrent Power Supply Fuse Capacity Ampacity Protection Outdoor units V/ Ph /Hz GMV-72WM/B-U(U) 460V 3~ 60Hz GMV-96WM/B-U(U) 460V 3~ 60Hz GMV-120WM/B-U(U) 460V 3~ 60Hz GMV-144WM/B-U(U) 460V 3~ 60Hz 20+20...

  • Page 33: Connection Of Power Cord

    GMV DC Inverter VRF Minimum Circuit Maximum Overcurrent Power Supply Fuse Capacity Ampacity Protection Outdoor units V/ Ph /Hz GMV-288WM/B-U(U) 460V 3~ 60Hz 25+25+25 18+18+18 25+25+25 GMV-312WM/B-U(U) 460V 3~ 60Hz 25+25+30 18+18+25 25+25+30 GMV-336WM/B-U(U) 460V 3~ 60Hz 25+30+30 18+25+25 25+30+30 GMV-360WM/B-U(U) 460V 3~ 60Hz 30+30+30...

  • Page 34: System Communication

    GMV DC Inverter VRF 4.7 System Communication 4.7.1 Communication system include: (1) Communication among outdoor basic modules. (2) Communication between ODU and IDU. (3) Communication among IDUs. (4) Communication between IDU and wired controller. (5) Connection between IDU and light board receiver. (6) Communication between different refrigeration systems.
  • Page 35 GMV DC Inverter VRF 4.7.3 Selection and connection mode of GMV5 communication material 4.7.3.1Select communication material If air conditioners are installed at places where there’s strong electromagnetic interference, the communication wire of IDU and wired controller must use shielded wire and the communication wire between IDU and IDU/ODU must use shielded twisted pair.
  • Page 36 GMV DC Inverter VRF All of the selected communication wire must be consistent with local laws and regulations. 4.7.3.2 Connection mode of communication (1) All communication wires of GMV5 must be connected in series rather than in star. Fig.4.7.4 Fig.4.7.5 Fig.4.7.6...

  • Page 37: Connection Method And Steps For System Communication

    GMV DC Inverter VRF (2) All communication wires of GMV5 are connected by screws. Fig.4.6.7 (3) If a single communication wire is not long enough and needs to be connected, the connected joint must be welded or pressure-welded. Do not simply twist the wires together. 4.7.4 Communication address Auto addressing technology is adopted for GMV5 IDU and ODU.
  • Page 38 GMV DC Inverter VRF Fig.4.8.1 Connection of single unit Fig.4.8.2 Connection of modular unit...
  • Page 39 GMV DC Inverter VRF (1) For modular outdoor units, if there are multiple outdoor modules, then the master unit must be the first outdoor module on the communication wire and should not connect with IDU (master unit is set by SA8 of the outdoor main board).
  • Page 40 GMV DC Inverter VRF Fig.4.8.6 Two wired controllers control multiple IDUs When two wired controllers control multiple IDUs, the wired controller can be connected to any one IDU, provided that the connected IDU is of the same series. Meanwhile, one and only one of the wired controllers must be set as a slave controller.
  • Page 41 GMV DC Inverter VRF 4.8.3 Communication connection of central controlling units The centralized controller can be installed when it is necessary. Port connection G1 and G2 on the communication wiring board of master unit among each multi VRF system (see below) Fig.4.8.7...

  • Page 42: External Electrical Wiring Diagram

    GMV DC Inverter VRF 4.9 External Electrical Wiring Diagram (1) Every unit should be equipped with a circuit breaker for short-circuit and overload protection. In general, circuit breaker is at OFF status. (2) During operation, all indoor units and outdoor units belonging to the same system must be kept energized status.

  • Page 43: Trial Run

    GMV DC Inverter VRF 5.2 Trial Run During debugging, one and only one module must be set as a master module. During debugging, one and only one IDU must be set as a master IDU. When no special requirement is needed, no need to set other functions. Unit can operate according to ex-factory settings.
  • Page 44 GMV DC Inverter VRF (2) When debugging starts, system will operate according to the ambient temperature. 1) When outdoor temperature is above 20ºC(68°F), debugging shall be in cooling mode. 2) When outdoor temperature is below 20ºC(68°F), debugging shall be in heating mode. (3) Before debugging, confirm again whether the cut-off valve of each basic module is fully turned on.
  • Page 45 GMV DC Inverter VRF Description of each stage of debugging progress Debugging —— Progress code Status code code LED1 LED2 LED3 Meaning Progress Display Display Display Code code Code status status status System detects “driven communication Light Light Light error between master unit and inverter compressor”.
  • Page 46 GMV DC Inverter VRF Description of each stage of debugging progress Debugging —— Progress code Status code code LED1 LED2 LED3 Meaning Progress Display Display Display Code code Code status status status Outdoor pipeline and valves are not Light Light Light normal.
  • Page 47 GMV DC Inverter VRF Step 6: Wait. Unit will then start progress 01 and 02; in progress 01, if master unit is not correctly set, progress 01 will show the following errors: —— Debugging Code Progress Code Status Code LED1 LED2 LED3 Meaning...
  • Page 48 GMV DC Inverter VRF If the quantity displayed is the same with actual quantity, then press SW7 confirmation button on the master unit to confirm it. Unit will start next progress: —— Debugging code Progress code Status code LED1 LED2 LED3 Progress Code...
  • Page 49 GMV DC Inverter VRF If error is detected, system will stay at current progress. Error has to be solved manually. Below is relevant error: —— Debugging code Progress code Status code LED1 LED2 LED3 Meaning Progress Display Display Display Code code Code status...
  • Page 50 GMV DC Inverter VRF —— Debugging code Progress code Status code LED1 LED2 LED3 Meaning Progress Display Display Display Code code Code status status status 08_Confirm Preheat time for compressor is less preheated Light Light Light than 8h. compressor Step 13: progress 09 is “Refrigerant judgments before startup” If the refrigerant quantity inside the system meets the requirement of operation startup, system will display as below and start next progress.
  • Page 51 GMV DC Inverter VRF Then check the big and small valves whether they are fully turned on. After the check, press SW6 return button to restart the judgments. If unit detects that valve status is normal, it will display as below and start next progress. ——...
  • Page 52 GMV DC Inverter VRF —— Debugging code Progress code Status code LED1 LED2 LED3 Meaning Progress Display Display Display Code code Code status status status Debugging is enabled in cooling mode Light Light Light (debugging mode, auto-selected by system). Error Error occurs during debugging in cooling Light Light...
  • Page 53 GMV DC Inverter VRF Step 20: deliver the product to user and inform user about usage precautions. 5.2.3 Appendix: judgment reference of normal operational parameters Reference of Debug Parameters of GMV5 DC Inverter Multi VRF System Debug item Parameter name Unit Reference Outdoor ambient temp...

  • Page 54: Common Malfunction And Troubleshooting

    GMV DC Inverter VRF Reference of Debug Parameters of GMV5 DC Inverter Multi VRF System Debug item Parameter name Unit Reference Ambient temp of IDU ºC(°F) —— ● According to different ambient temp, for a same IDU Inlet tube temp of ºC(°F) indoor heat exchanger under cooling mode, inlet tube temp will be...
  • Page 55 Otherwise, there will be collision malfunction of the project codes. For detail operation methods, please refer to the GMV5 Installation and Maintenance Manual. (2) If problem cannot be solved after checking the above items, please contact Gree service center and show phenomena and models.

  • Page 56: Error Indication

    GMV DC Inverter VRF 7 Error Indication Inquiry method of malfunction display: combine division number and content number to check the corresponding malfunction. Indoor: Error Code Content Error Code Content Malfunction of lower water temperature Malfunction of IDU sensor of water tank Malfunction of ambient temperature Protection of indoor fan sensor...
  • Page 57 GMV DC Inverter VRF Outdoor: Error Code Content Error Code Content Current sensor of compressor 1 is Malfunction of ODU abnormal Current sensor of compressor 2 is High-pressure protection abnormal Current sensor of compressor 3 is Discharge low-temperature protection abnormal Current sensor of compressor 4 is Low-pressure protection abnormal...
  • Page 58 GMV DC Inverter VRF Error Code Content Error Code Content Drive IPM high temperature protection of Malfunction of driving board of fan compressor Desynchronizing protection of inverter Driving board of fan operates compressor abnormally Malfunction of drive storage chip of Voltage protection of driving board compressor power of fan...

  • Page 59: Maintenance And Care

    GMV DC Inverter VRF Error Code Content Error Code Content Address DIP switch code of system is Charging of refrigerant is invalid shocking Identification malfunction of IDU of Malfunction of multiple wired controller mode exchanger Communication malfunction between Communication malfunction between IDU, ODU and IDU’s wired controller IDU and the receiving lamp Communication malfunction between...

  • Page 60: Outdoor Heat Exchanger

    Gree. Warranty should meet the following requirements: (1) First run of the unit should be operated by professional personnel from Gree appointed service center. (2) Only Gree manufactured accessories can be used on the machine.

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