Gree GMV-121WL/C-T User Manual

GREE DC Inverter Multi VRF System II Service Manual
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1RWH
ķThe refrigerant amount charged before delivery doesn’t include the amount that needs to be added
to indoor units and the connection pipeline.
ĸLength of connection pipe is decided on site. Therefore the amount of additional refrigerant shall be
decided on site according to the dimension and length of field-installed liquid pipe.
ĹRecord the amount of additional refrigerant for convenience of after-sales service.
2) Calculation of the amount of additional refrigerant
Calculation method of the quantity of additional refrigerant (based on liquid pipe)
Quantity of additional refrigerant = ∑length of liquid pipe X quantity of additional refrigerant per meter
Quantity of additional refrigerant per meter for liquid pipe˄kg/m˅
Φ22.2
Φ19.05
Φ15.9
Φ12.7
Φ9.52
Φ6.35
0.35
0.25
0.17
0.11
0.054
0.022
Note:First confirm that there is no leakage from the system. When compressor is not working, charge
additional R410a with specific amount to the unit through the filling opening of the liquid pipe valve
of the outdoor unit. If required amount cannot be quickly filled due to pressure increase of the pipe,
then set the unit in cooling startup and fill refrigerant from the low pressure check valve of the
outdoor unit.
3) Calculation example
IDU
No.
IDU ķ
IDU ĸ
IDU Ĺ
IDU ĺ
Model
Duct type
GMV-ND72PL/B-T
Duct type
GMV-ND50PL/B-T
Duct type
GMV-ND36PL/B-T
Duct type
GMV-ND25PL/B-T
Liquid pipe:
No.
A
B
C
D
Pipe size
Φ9.52
Φ9.52
Φ9.52
Φ6.35
Length
10m
5m
5m
5m
No.
a
b
c
d
Pipe size
Φ9.52
Φ6.35
Φ6.35
Φ6.35
Length
3m
3m
2m
1m
Total length of each liquid pipe
Φ9.52˖A+B+C+a=10+105+5+3=23m
Φ6.35: D+b+c+d=5+3+2+1=11m
The minimum quantity of additional refrigerant = 23×0.054+11×0.022˙1.484kg

Gree GMV-121WL/C-T Specifications

General

Brand	Gree
Model	GMV-121WL/C-T
Category	Air Conditioner
Language	English