Gree GMV-224WM/B-X, Service Manual

Page: 125 / 375

GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
122
IV. References for Proper Unit Operation
Parameters
SN
Commissioning Item
Parameter
Name
Unit
Reference Value
1
System
parameter
Outdoor
unit
parameter
Outdoor
environment
temperature
°C
——
2
Discharge pipe
temperature of
compressor
°C
●When the system compressor is
running, the normal discharge
pipe or top temperature for
cooling is 70-95°C, which is more
than 10°C higher than the
saturation temperature
corresponding to the system
high-pressure. The normal
temperature for heating is
65-80°C, which is more than
10°C higher than the saturation
temperature corresponding to the
system high-pressure.
3
Defrosting
temperature
°C
●When the system runs for
cooling, the defrosting
temperature is 5-11°C lower than
the system high-pressure value.
●When the system runs for
heating, the defrosting
temperature is 2°C higher or
lower than the system
low-pressure value.
4
System
high-pressure
°C
●The normal system
high-pressure value is 20-55°C.
With the change of environment
temperature and system
operation capacity, the system
high-pressure value is 10-40°C
higher than the environment
temperature. The higher the
environment temperature, the
less the temperature difference.
●When the system runs for
cooling with the environment
temperature being 25-35°C, the
system high-pressure value is
44-53°C.
●When the system runs for
cooling with the environment
temperature being -5 to 10°C, the
system high-pressure value is
40-52°C.
5
System
low-pressure
°C
●When the system runs for
cooling with the environment
temperature being 25-35°C, the
system low-pressure value is
0-8°C.
●When the system runs for
cooling with the environment
temperature being -5 to 10°C, the