Gree GC201808-III, Service Manual

Page: 154 / 362

GREE GMV5 HR HEAT RECOVERY UNITS
150
4 REFERENCES FOR PROPER UNIT
OPERATION PARAMETERS
SN Commissioning Item Parameter Name Unit Reference Value
1
System
parameter
Outdoor unit
parameter
Outdoor
environment
temperature
°C/
° F
——
2
Discharge pipe
temperature of
compressor
°C/
°
F
●When the system compressor is running, the normal
discharge pipe or top temperature for cooling is
70-95°C
(
167-203
° F)
, which is more than 10°C
(
18
° F)
higher than the saturation temperature corresponding
to the system high-pressure. The normal temperature
for heating is 65-80°C
(
149-176
°
F)
, which is more than
10°C
(
18
° F)
higher than the saturation temperature
corresponding to the system high-pressure.
3
Defrosting
temperature
°C/
° F
●When the system runs for cooling, the defrosting
temperature is 5-11°C
(
41-52
°
F)
lower than the system
high-pressure value.
●When the system runs for heating, the defrosting
temperature is 2°C
(
3.6
° F)
higher or lower than the
system low-pressure value.
4
System
high-pressure
°C/
° F
●The normal system high-pressure value is
20-55°C
(
68-131
° F)
. With the change of environment
temperature and system operation capacity, the
system high-pressure value is 10-40°C
(
50-104
° F)
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
(
77-95
° F)
, the
system high-pressure value is 44-53°C
(
111-127
° F)
.
●When the system runs for heating with the
environment temperature being -5 - 10°C
(
23-50
° F)
,
the system high-pressure value is 40-52°C
(
104-125
°
F)
.
5
System
low-pressure
°C/
°
F
●When the system runs for cooling with the
environment temperature being 25-35°C
(
77-95
° F)
, the
system low-pressure value is 0-8°C
(
32-46
° F)
.
●When the system runs for heating with the
environment temperature being -5 - 10°C
(
23-50
° F)
,
the system low-pressure value is -15 - 5°C
(
5-41
° F)
.
6
Opening degree
of heating
electronic
expansion valves
PLS
●During the cooling operation, the heating electronic
expansion valves always remain at 480 PLS.
●During the heating operation, the adjustable
electronic expansion valves change between 120 and
480 PLS.
7
Current of inverter
compressor
A
●According to different operation frequencies and
loads, the current of inverter compressor 1 changes
between 7 and 25 A. The current of inverter
compressor 2 changes between 7 and 20 A.