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Hello. Welcome to Just Answer. Please allow me to assist you. The link you have provided would work very well. Thsi looks like a very nice setup and the price is reasonable. You do NOT need an air compressor.
If you have any questions, please feel free to reply. Please do take a moment to confirm you have received my input. Thanks!
The refrigerant is under pressure. It pushes itself into the system which causes the pressure switch to activate; this causes the compressor to start. The compressor draws the rest of the needs freon in. It is CRITICAL that you do not put too much in. Follow the directions to the letter.
Depending on your vehicle, you may need 2 or 3 cans of refrigerant.
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The capture will not open. However, 29 ounces seems right.
You use the manifold gauges to charge. Charge on the BLUE hose. Read the manual; it will tell you Low Side (blue gauge) pressure. When the pressure on the blue gauge is correct, shut off the valve and stop adding freon.