Support And Protection Of Pipeline; Disassembly Of Compressor Feet; Vacuum Pumping, Refrigerant Adding - Gree GMV-24WL/C-T Service Manual

GREE
(1) Thermal insulating material shall be able bear the pipe temperature. For heat pump unit, liquid pipe should bear
70℃(158℉) or above and gas pipe should bear 120℃(248℉) or above. For cooling only unit, both liquid pipe and
gas pipe should bear 70℃(158℉) 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.

6.1.6 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.

6.2 Disassembly of Compressor Feet

In order to prevent unit from damage during transportation, 2 metal pieces are fitted to outdoor unit's
compressor feet before unit leaves factory. See fig.22.
When installing the unit, metal pieces for transportation must be removed （ except for
GMV-60WL/A-T(U)） . Then fasten the binding nuts again and wrap back soundproofing cotton.If unit runs
with metal pieces fitting on, compressor will shake abnormally and unit's operating life will be shortened.

6.3 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!
6.3.1 Vacuum Pumping
(1) Outdoor unit has been charged with refrigerant before delivery. Field-installed connection pipe
needs to be charged with additional refrigerant.
(2) Confirm whether outdoor liquid and gas valves are closed.
(3) Use vacuum pump to withdraw the air inside indoor unit and connection pipe from the outdoor
valve, as shown below.
DC Inverter Side Discharge VRF Ⅱ for North America
Fig. 22
80