Refrigerant Charging - Gree GWHD(48S)NM3CO Service Manual

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Service Manual
6.10

Refrigerant Charging

The refrigerant has been charged into the outdoor unit before shipped from the manufacturer, while
additional refrigerant still need be charged into the refrigerant pipe during the field installation.
6.10.1 Calculation of the Additional Refrigerant Charging
1) Get the refrigerant charge of the outdoor unit from the nameplate.
Note:
The refrigerant charge of the outdoor unit does not include the charged additionally in the indoor unit,
BU module and the refrigerant pipe.
For the length of the connecting pipe is decided on the field, the amount of additional refrigerant shall
be decided depending on the dimension and the length of the liquid pipe used on the field.
Record the additional refrigerant charge for future maintenance.
It does not need to add refrigerant if the total length of liquid pipe is within 30m.
2) Calculating the Mass of Additional Refrigerant
Additional Refrigerant Charge (kg) =
Length of Φ9.52×0.054kg/m-1.47(kg)
If the additional refrigerant charge is negative, it does not need to add the refrigerant.
3) Example: GWHD(56S)NM3CO
INSTALLATION 104
Σ
Serial No.
Indoor unit 1
Indoor unit 2
Indoor unit 3
Indoor unit 4
Indoor unit 5
Indoor unit 6
Serial No.
L1
L2
L4
1A
1B
1C
2A
2B
2C
the Liquid Pipe Length of Φ6.35×0.022kg/m +
Cassette type
Duct type
Wall mounted type
Wall mounted type
Duct type
Wall mounted type
Diameter(mm)
Φ9.52
Φ9.52
Φ9.52
Φ6.35
Φ6.35
Φ6.35
Φ6.35
Φ6.35
Φ6.35
Σ
the Liquid Pipe
Model
GKH(12)BA-K3DNA2A/I
GFH(09)EA-K3DNA1A/I
GWH(07)UA-K3DNA1B/I
GWH(09)MA-K3DNA3E/I
GFH(09)EA-K3DNA1A/I
GWH(09)TA-K3DNA1E/I
Length(m)
20
10
10
5
5
5
5
5
5