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10.2.6 Connect the refrigerant pipe
Selection of Connecting Pipe
The refrigerant is R410A, GWP=2020 ODP=0
Item
Model
GUHD12NK3CO
GKH12K3CI
GUHD18NK3CO
GKH18K3CI
GUHD24NK3CO
GKH24K3CI
GUHD30NK3CO
GKH30K3CI
GUHD36NK3CO
GKH36K3CI
GUHD36NM3CO
GKH36K3CI
GUHD42NK3CO
GKH42K3CI
GUHD42NM3CO
GKH42K3CI
Note:
1. The standard pipe length is 5m, When the length (L) of the connecting pipe is less than or equals 7m,
there is no need to add refrigerant. If the connecting pipe is longer than 7m, it is required to add
refrigerant, in the above table, the amounts of refrigerant to be added for the models are listed for
each additional meter of pipe length.
2. The pipe wall thickness shall be 0.5-1.0mm and the pipe wall shall be able to withstand the pressure
of 6.0MPa.
3. The longer the connecting pipe, the lower the cooling effect and the heating effect.
Table 3 refrigerant pipe selecting
Size of Fitting Pipe
(Inch)
Gas
Liquid Pipe
Pipe
3/8
1/4
1/2
1/4
5/8
3/8
5/8
3/8
Max
Max Height
Pipe
Difference between
Length
Indoor Unit and
(m)
Outdoor Unit(m)
20
15
20
15
30
15
50
30
42
Amount of
Additional
Refrigerant to Be
Filled For Extra
Length of Pipe
30g/m
30g/m
60g/m
60g/m
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