High Efficiency and More Energy Saving

Thanks to the advanced all DC inverter technology, optimized system design and accurate intelligent control technology, IPLV of GMV5 All DC Inverter Multi VRF System is up to 6.8.

New Generation of Energy-saving Operation Control Technology with Energy Saving Up to 20%

The GMV5 system has 2 modes for energy saving, which can be chosen to meet different electricity demands.

Mode 1: In auto energy-saving mode, the system will self-adjust parameters according to the operation status, thus to lower the cost of electricity. Up to 15% of energy can be saved.

Mode 2: In compulsory energy-saving mode, the system will limit power output forcibly. Up to 20% of energy can be saved.

Comfortable Heating

Advanced intelligent defrosting mode is adopted. Gree advanced intelligent defrosting mode will choose the best defrosting way according to outdoor temperature and operation status to realize intelligent defrosting, effectively improving heating effect and performance. While in traditional defrosting mode, timing defrosting is adopted, which not only affects comfort but also reduces energy efficiency.

Accurate Intelligent Allocation Technology of Capacity and Output of Optimal Portion to Ensure Highest Efficiency

• • When total load demands more than 75% of a running system's capacity, one more unit will automatically start;

  • When total load demands less than 40% of a running system's capacity, one unitwill automatically shut down;

  • Therefore, each unit shares 40%-75% of the total load.

  • Experiments show that an air conditioner costs the least energy when it's operating within 40%-75% of its capacity.

• 

Output of Optimal Portion to Ensure Highest Efficiency

The best heating or cooling performance can be realized in the most energy-saving way. DC inverter compressor and DC inverter fan will also be operating in this way to ensure high efficiency.

Sub-cooling Control Technology to Ensure Optimal Cooling and Heating

• Heat exchange loop can control the first subcooling process of heat exchanger. Subcooling degree can reach 11C.

  

• Subcooling loop can realize 9 C second subcooling to guarantee cooling and heating performance

  

Temperature Controlled by Wired Controller with Higher Efficiency and More Energy Saving

Through setting temperature lower limit in cooling or dry mode, and setting temperature upper limit in heating, 3D heating or heat supply mode, the system is able to operate in a smaller temperature range so as to achieve energy saving.

Comfortable Design for A Better Life

The GMV5 system has a wide range of working conditions. Whether it's in a cool winter or a hot summer, normal operation is guaranteed with the least noise, making users feel more comfortable.

Outdoor Unit Quiet Mode and Quiet Control

• Quiet at night

  The system can record the highestoutdoor temperature. At night, the system will automatically turn to quiet mode. There are 9 quiet modes which can be set according to actual needs.

  

• Quiet in compulsion

  The system can also be set in this mode to ensure low noise as long as it is operating. Noise is as low as 45dB(A).

  

• Quiet Control

  1. Optimized Bossing Design After many times of CFD tests, a new fan bossing structure has been developed to reduce vibration of fan during running. Noise can be reduced by 3dB(A).

  

  2. Aerodynamics 3D Axial Fan Compared with conventional fan, it can increase air volume by 12%, improving efficiency as well as lowering noise.

  

Quiet Indoor Unit

The indoor unit of the GMV5 system also adopts DC inverter motors to realize stepless regulation. According to indoor temperature or people's needs, users can set this mode through wired control¬ler. Noise is as low as 22dB(A).

Fast Start-up in Heating

DC Compressor is first started to avoid too much electric current. Inverter compressor can operate in high frequency once starts up, so as to produce more heat.

7 Speeds Indoor Fan

Indoor fan speed can be set in 7 levels by wired controller. They are auto, low speed, medium-low speed, medium speed, medium-high speed, high speed and turbo. When the wired controller is on, press "FAN" button to set indoor fan speed circularly as below:

Excellent Performance Ensured bq Advanced Technology

Through 10 years of research and development, Gree GMV5 has been further upgraded to a high level from electrical components, mechanical parts, control technology to communication technology.

Two-stage Oil Separation Control Technology (Patented)

First-stage oil separator adopts a filtration expansion valve with separation efficiency of 98%; Second-stage oil separator will separate the remained 2% refrigerant oil with separation efficiency of 95%. General oil separation efficiency reaches 99.9%.

Oil Return Control Technology

• New Oil Return Control

  Gree new oil return control technology effectively controls system oil return and oil storage status of each compressor, which greatly improves the operation lifespan of compressor.

  

• Specialized Compressor Oil Storage Control

  The system applies specialized compressor oil storage technology, which can control the lowest oil level for compressor operation.

  

Oil Balance Control Technology

• Oil Balance between Each Module

  Based on the actual status of each module and compressor, the system can regulate compressor's operation and realize oil balance of each module.

  

• Oil Balance between Each Compressor

  Refrigerant is taken into the compressor by the suction pipe and then runs through the cooling system. It can control the oil level and minimum oil volume required by each compressor so as to realize oil balance between each compressor.

  

Intelligent Detection Control

• Pressure Sensor Detection Control

  Pressure sensor can precisely detect system high pressure and low pressure, and adjust output of fan and compressor, so as to make sure the system can work under the most energy-saving pressure condition.

  

• Temperature Sensor Detection Control

  Various temperature sensors are equipped to detect ambient temperature, indoor temperature and refrigerant's evaporating temperature, from which the operation status can be measured.

Multi Electronic Expansion Valves Control

Outdoor electronic expansion valve not only has throttling effect, but also control refrigerant flow. The system adopts multi electronic expansion valves control with total 960 grades regulated by two electronic expansion valves, so as to regulate refrigerant flow precisely and ensures reliable operation of system.

Smaller Impact to Power Grid

The start-up frequency of inverter compressor is gradually increased from 0Hztothe appointed operation frequency. The start-up current of compressor rotor is decreased by reducing load torque, hence impact to power grid during start-up is reduced and electromagnetic impact to compressor is reduced too.

Modules Rotation Operating to Maximize Lifespan

Modules 8h rotation operating

The operating priority sequence of the outdoor unit modules will be changed without restart when the system accumulatively operates for 8 hours, which can maximize the service life of the system.

Highly Anticorrosive Golden Fins

The primary material of Golden Fin is Al-Mn(Alu-nnium-Manganese) anti-rust alloy, which is coated with the Golden Protection Layer(Components: Exoxy Resin & Modified Acrylic, Silicon free), the anti-corrosice performance in salt-spray testing is 200%-300% higher than normal Blue Fin*.
Note: Satt-spary testing result is from GREE materials chemistry testing laboratory.

Emergency Auto-Off Control

The outdoor unit can be linked with a fire alarm signal. In case of emergency, unit can automatically turn off to avoid risk or further loss.

Electricity Shortage Identification

The outdoor unit can receive a power signal of electricity shortage. In some places like first-class hotels, if diesel generator is used temporarily for providing electricity, outdoor unit will send the electricity shortage signal to indoor unit. In this case, only VIP rooms can be provided with air conditioning service.

Excellent Emergency Operation Function to Ensure Reliable Operation

• Emergency Function

  The GMV 5 system can realize a combination of 4 outdoor unit modules. When error is occurred to one of the modules, the others will perform the emergency operation to sustain the air conditioning.

  

• Emergency Operation of Compressor

  All the compressors in each single module are DC Inverter based, when one compressor has error, others will performthe emergency operation.

  

• Emergency Operation of Fan

  Double-fan design fan ensures that one fan can still work even if the other one has error.

  

Easy Installation for Various Kinds of Construction

ODU High Static Pressure Design

System has 4 levels of static pressure that can be set. Up to 82Pa pressure can be set for an outdoor unit. This design is especially useful when an outdoor unit needs to be placed indoor.

1000m Pipe Design for Flexible Installation

GMV5 system can be applied in different types of building construction. One of its advantages is the simple pipe design, which will simplify the installation and reduce installation cost.

• Max total pipe length reaches 1000m (with limita-tion)

• Actual pipe length between the outdoor unit and the farthest indoor unit: 165m

• Max height difference between indoor unit and outdoor unit: 90m

Note: a: Distance between the first branch and the farthest indoor unit. b: Distance between the frist branch and the nearest indoor unit. a-b5.40m

Intelligent Debugging for Convenient Construction

GMV5 has five auto debugging features:

• Automatic allocation of IDU and ODU addresses

• Automatic detection of IDU and ODU quantity

• Automatic detection of errors

• Automatic start-up of debugging

• Real-time judgment of pipe errors

Auto-refrigerant Recovery for Easy Maintenance

When auto refrigerant recovery function is set and cut-off valve of liquid pipe is closed during maintenance, the system will automatically operate compressor, EXV, solenoid valve and fan, etc. Taking advantage of compressor power, the refrigerant is recovered at the condensing side of outdoor unit to achieve environmental effect. Meanwhile, system low pressure is displayed simultaneously during refrigerant recovery.

Inspection Window for Convenient Checking

Inspection window is available for quick checking of system operation status. No need to open panel for checking, which will be more time-saving and easier for maintenance

Flexible Wiring

Common wire can meet the communication demand with no need of specialized communication wire. Common sheath twisted pair cable can be used as there is no polarity requirement.

Auto Addressing of Outdoor and Indoor Unit

CAN network is adopted to achieve auto addressing of outdoor and indoor unit. It can allocate IDU and ODU addresses and detect IDU and ODU quantity, which greatly improves construction efficiency.

Professional Hotel Functionsch

Gree GMV5 provides hotels with unique season setting function and key-card control function.

Season Setting

Cooling or heating mode can be deactivated during a certain season to avoid affecting unit's normal operation due to mode conflict.

Key-card Control for Hotel Management

The unit can be turned on or off by inserting or removing the key-card. When the key-card is removed, the system can remember all the setting and stop operation. When the key-card is inserted back, the system will be under standby mode or operate according to the status before removing key-card. It is well suited to hotels, restaurants, etc.