Gree Ultra Heat GMV-VQ72W/A-F, Service Manual, Page: 24 / 207

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION
20
(1) Flow direction of refrigerant leakage.
(2) Room for refrigerant leakage. Since the concentration of refrigerant is greater than that of air,
pay attention to the spaces where the refrigerant may residue, for example, the basement.
If the above equation cannot be satisfied, then follow the following steps.

Selection of air conditioning system: select one of the next
(1) Installation of effective opening part
(2) Reconfirmation of Outdoor Unit capacity and piping length
(3) Reduction of the amount of refrigerant
(4) Installation of 2 or more security device (alarm for gas leakage)

Change Indoor Unit type:
Installation position should be over 6.6ft from the floor (Wall mounted type → Cassette type)

Adoption of ventilation system:
Choose ordinary ventilation system or building ventilation system

Limitation in piping work:
Prepare for earthquake and thermal stress
8 UNIT OPERATING TEMPERATURE
Cooling Ambient temperature: -10ºC(14ºF)~52ºC(125.6ºF)
Heating Ambient temperature: -30ºC (-22ºF)~24ºC (75.2ºF)
Heat recovery operation Ambient temperature: -10
º
C(14
º
F)~20
º
C(68
º
F)
When the indoor units are all VRF air processor, the unit operating range is as follows:
Cooling operation Ambient temperature: 16
º
C(60.8
º
F)~45
º
C(113
º
F)
Heating operation Ambient temperature: -7
º
C(19.4
º
F)~16
º
C(60.8
º
F)
NOTICE! Out of the working Temperature Range may damage this products and will invalidate the
warranty.
Electrify the unit 8 hours before operation. Please switch on for 8 hours before operation. Do not cut
off the power when 24 hours short-time halting (to protect the compressor).