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GMV5 HR HEAT RECOVERY
VRF Units Technical Sales Guide
The motor torque is directly controlled to realize operation of the DC inverter at an ultralow speed. The
small torque pulsation not only meets system requirements, but also guarantees the higher degree of
comfort.
1.2 Comfortable mute
Gree GMV5 HR air conditioning units fully consider the comfort requirement of people, and the
humanized technology further perfects the degree of comfort. The wider operation range of the units
ensures normal operation in sub-zero weather or hot weather. The better mute effect creates a quiet
environment for work and life.
Outdoor unit mute mode
Night mute
The system can memorize and judge the outdoor maximum temperature. When the system operates
with a low load at night, it can automatically enter the mute mode. Nine mute modes can be set for the
units according to requirements of actual application scenarios.
For example, the unit can automatically enters the night operation mode after operation for 8 h, and
will restore the normal operation mode in 9 h.
Forced mute
When the unit is installed at a place with the requirement for a lower noise level, it should operate in the
mute mode in the daytime and at night. In this case, three forced mute setting modes can be selected to
ensure that the unit operates at the low noise mode all the time
.
Indoor unit mute mode
The indoor unit also adopts the DC inverter motor to implement stepless speed regulation and greatly
reduce the noise level. Moreover, the wired controller can be used to set the automatic mute mode
of indoor unit and enable the automatic mute function according to the indoor temperature and
movements of persons.
1.3 Advanced technology to ensure stability and reliability
Gree GMV5 HR series units have earned a reputation in the field due to the high technical content.
Thanks to research and experiments for more than one decade, all the technologies of GMV have
become more matured. Gree GMV5 HR has been upgraded in an all-round way, including electric
elements, machine elements, control technology and communication technology. Continuous revolution
in technologies must bring more reliable and efficient service to users.
Oil return control of new generation
Gree oil return control technology of new generation integrates the pressure control oil return
technology. Pressure control effectively controls oil return of the system and the oil storage status of each
compressor, thus substantially increasing the service life of the compressor.
Proprietary compressor oil storage technology
Gree DC inverter unit is designed with the proprietary compressor oil storage technology. The relevant
parameter is judged to control the lowest oil level required for operating the compressor.
Refrigerant storage and distribution technology
GMV5 HR adopts the system loop without any reservoir to greatly reduce the refrigerant filling quantity,
improve the refrigerant control precision of the system, and store the surplus refrigerant in the pipeline.
Inter-compressor oil balance technology
Refrigerant is sucked into the compression chamber of the compressor through the air suction pipe,
discharged to the fully-closed compressor cavity after being compressed, and then flows through the
refrigerating system via the vent pipe. According to the principle of moving fluid mechanics and the oil
quantity actually required during operation of the compressor, the technology decides the height of the
oil balance pipe, controls the oil level in the oil pool, ensures the minimum oil quantity required by each
compressor during operation, and implements oil balance between compressors.
Unique comfortability control
