Gree R410A, Manual

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50
for North America
Photovoltaic Direct-driven VRF
1) Thermal insulating material shall be able bear the pipe temperature. For heat pump unit, liquid pipe
should bear 70
o
C(158
o
F) or above and gas pipe should bear 120
o
C(248
o
F) or above. For cooling only
unit, both liquid pipe and gas pipe should bear 70
o
C(158
o
F) or above.
2) Thermal insulating material of branches should be the same as that of the pipeline. The attached foam of
branches cannot be taken as insulating material.
7.1.6 Support and Protection of Pipeline
1) Support should be made for hanging connection pipe. Distance between each support cannot be over
1m(3-1/4feet).
2) Protection against accidental damage should be made for outdoor pipeline. When pipeline exceeds
1m(3-1/4feet), a pinch board should be added for protection.
7.2 Disassembly of Compressor Feet
factory.
Fasten the nut after removal
Metal pieces
Metal pieces
Binding nut
Compressor
When installing the unit, metal pieces for transportation must be removed. Then fasten the binding nuts again and wrap back
s operating life will be shortened.
7.3 Vacuum Pumping, Refrigerant Adding
Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation! There is no extra refrigerant in the outdoor unit
for air purging!
7.3.1Vacuum Pumping
1) Outdoor unit has been charged with refrigerant before delivery. Field-installed connection pipe needs to be charged with additional
refrigerant.
2)
3) Use vacuum pump to withdraw the air inside indoor unit and connection pipe from the outdoor valve, as shown below.