Common Tools And Devices - Gree GMV-S120WL/A-S Service Manual

2.Common Tools and Devices

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Three-stage distribution box-----Fig. 1
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Multifunctional measurement gauge---Fig. 2
The measurement gauge shall be able to withstand higher pressure. The size of connection
pipe is different from the previous pipe in order to avoid misuse.
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Control valve---Fig. 3
Avoid overflow of refrigerant during moving and enable instant open and close of liquid pipe
side and refrigerant charging tank port.
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Charging safety device (gas-liquid separator)
Usually, refrigerant must be changed into liquid state. Since R410A is a kind of mixed
refrigerant, hazards may be caused if the mixed ratio changes. In order to avoid refrigerant
flowing back to compressor in liquid state, this device can be used to make refrigerant get into
compressor securely.
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Electronic scale----Fig. 5
Electronic scale is the recommended device for charging R410A.
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Refrigerant container---Fig. 6
Confirm the refrigerant type before charging. Usually, R410A refrigerant in liquid state shall
be charged.
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Thermal resistor vacuum measurement meter---Fig. 7
In order to remove the vapor in refrigeration circulation, proper vacuum drying must be
applied. For this purpose, you can use this device to check if the system is vacuum.
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Vacuum pump---Fig. 8
Use it to vacuum the refrigeration circulation and detection system.
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Welding tool---Fig. 9
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Pipe bender---Fig. 10
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Pipe expander---Fig. 11
In order to adapt to the high pressure of R410A, the shape of expander is different from the
conventional one.
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Nitrogen tank---Fig. 12
The nitrogen in the tank is for driving oxygen during welding in order to avoid forming
oxidation film and oxidation inside the system.
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Phillips screwdriver/Slotted Screwdriver---Fig. 13
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Clipper---Fig. 14
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Adjustable wrench 8 / 12---Fig. 15
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Momental wrench---Fig. 16
Tighten flaring nut
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Double-ended pressure meter---Fig. 17
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Level bar---Fig. 18
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Impact electric hammer---Fig. 19
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Electric hand drill--Fig. 20
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Oxygen relief valve/Nitrogen relief valve/Acetylene relief valve/ Backfire check
valve--Fig. 21
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Gas leakage detector--Fig. 22
Specialized for leakage detection for HFC refrigerant.
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Refrigerant cleaner--Fig. 23
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Refrigerant collection device(collector) --Fig. 24
GMV5 Home DC Inverter Multi VRF Units
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