GREE 8Ton GMV DC Inverter VRF Units Outdoor Units Heat Pump

Product Features

• My Whe Chat ：+86 18551208706
• My Whats App：+86 18906202646
• BASIC OPERATING PRINCIPLE
• Outdoor units of GMV5 VRF air conditioner can be implemented by combining multiple modules in
• parallel. Similarly, indoor units (IDUs) consist of multiple units connecting in parallel. The operating
• principle is as follows: When an IDU is operating in cooling mode, the outdoor unit (ODU) can
• correspondingly enable the outdoor module based on the operating load requirement of the IDU. The
• outdoor heat exchanger serves as a system condenser, and the heat exchangers of cooling IDUs are
• connected in parallel to serve as a system evaporator. The circulation of air supply and air return of the
• IDU is performed to adjust the indoor temperature and humidity. When an IDU is operating in heating
• mode, all four-way valves in the ODU module are switched into energized status. The outdoor heat
• exchange serves as the system evaporator, and the heat exchanger of the IDU serves as the system
• condenser. The circulation of air supply and air return of the IDU is performed to adjust the indoor
• temperature and humidity
• Adjusts its own rotational speed based on the actual requirement of the
• serial number Name Main Function
• 1 、Compressor :Adjusts its own rotational speed based on the actual requirement of the system to implement capacity control.
• 2 、Compressor heat tape: Maintains a proper oil temperature in the compressor when the compressor is in standby status, ensuring the reliability during compressor startup.
• 3、Compressor casing-top temperature sensor: Detects a compressor's exhaust gas temperature for compressor control and protection.
• 4、Exhaust pipe temperature sensor of compressor：Detects a compressor's exhaust gas temperature for compressor control and protection.
• 5 High-pressure circuit breaker：Protects a compressor by sending feedback signal to stop the system when the compressor's discharge temperature exceeds the operating value of high-pressure circuit breaker
• 6 Oil extractor Separates the gas and oil in the system to ensure compressor reliability.
• 7 Oil balance device：Equalizes the oil for all modules in the case of excess oil in the current module when multiple modules are arranged in parallel, thus ensuring the system reliability.
• 8 Heat tape of oil balance device：Maintains a proper oil temperature in the compressor when the compressor is in standby status, ensuring the reliability of compressor startup.
• 9 One-way valve： Prevents high-pressure gas from entering the compressor and fast balances the suction pressure and discharge pressure in a compressor.
• 10 High-pressure sensor：Detects the high pressure value in the system in real time mode for compressor protection and other control functions.
• 11 Four-way valve： Used for the switching between the cooling and heating functions of system IDU.
• 12 Heat exchanger ：Used for outdoor heat exchange.
• 13 Fan： Strengthens heat exchanging.
• 14 Defrosting temperature sensor ：Used for defrosting detection.
• 15 Electronic expansion valve for heating： Controls refrigerant adjustment in heating mode.
• 16 One-way valve：Controls refrigerant flow direction.
• 17 Subcooler electronic expansion valve： Controls the degree of subcooling of tube refrigerant when the system is running in cooling mode, and reduces the capacity loss on pipes.
• 18 Subcooler： Controls the degree of subcooling of tube.
• 19 Liquid outlet temperature sensor of subcooler： Detects tube temperature.
• 20 Inlet temperature sensor of gas-liquid separator：Detects the inlet temperature of gas-liquid separator to prevent the system from running when the refrigerant flows back to the compressor.
• 21 Gas outlet temperature sensor of subcooler: Detects gas temperature of subcooler.
• 22 Low-pressure sensor :Detects system low pressure to avoid extra-low operating pressure.
• 23 Gas-liquid separator: Separate gas and liquid to prevent the system from running when the refrigerant flows back to the compressor.
• 24 Outlet temperature sensor of gas-liquid separator:Detects internal status of gas-liquid separator to further control the compressor suction performance.
• 25 Oil balance valve 1: Used for oil balance control among modules.
• 26 One-way valve :Used for oil balance control among modules and avoid reverse flow of oil.
• 27 Unloading valve :Avoids over-high pressure caused by pipeline blind spot.
• 28 Oil balance valve 2: Used for oil balance control among modules.
• 29 Filter: Prevents impurities from entering components and parts.
• 30 Capillary tube :Supports flow regulating and pressure reduction.GREE GMV5 DC Inverter VRF Units
• 31 Liquid valve :Stop valve, closed when the unit is delivered from the factory and will be opened after installation.
• 32 Gas valve: Stop valve, closed when the unit is delivered from the factory and will be opened after installation.
• 33 Low-pressure measurement valve: Detects the low pressure value or charges refrigerant during system running.
• 34 Oil balance valve :Stop valve, closed when the unit is delivered from the factory and will be opened after installation.
• 35 Oil check valve :Checks the quality of refrigerating machine oil of compressor during maintenance.
• 36 Unloading valve :Avoid over-high pressure caused by pipeline blind spot.
• 37 Air by-pass valve: Avoids extra-high or low operating pressure.
• 38 Pressure-balanced valve :Ensures success startup of compressor.
• This manual specifies safe operation requirements for GMV5 series VRF units from perspectives of
• engineering and installation, commissioning and maintenance, as well as basic principles and
• implementation methods. Professional operators must abide by relevant national (local) safety
• requirements and technical specifications set forth in this manual during operations; otherwise, the air
• conditioning system may fail or be damaged, and personnel safety accident may also occur.