Oxygen or compressed air should never be used because they contain moisture, and moisture reacts with oil in the system to for acids ( organic solids ) R12 R22 R502 R134a will hydrolyze ( a chemical reaction ) with water forming hydrochloric and hydrofluoric acids and more water. Motor windings will deteriorate and metal corrosion and sludge can occur
This system is generally prescribed when oxygen is not needed constantly (e.g., when it is only needed when performing physical activity).
on hot water heat with a boiler you should pressurize the system then open the bleeders
yes
You may have air pockets trap in the cooling system.
Cycle the ignition on and off several times holding it in the on position for a few seconds each time. Doing this 4-5 times will allow the fuel pump to pressurize the fuel system.
The oxygen system should be kept clean and dust-free.
you can pressurize the system to find a leak
pressurize the system
Hydra-boost
If you are talking about a normal house, all you need to do to 'pressurize the system' is turn on the main valve, then open up each tap/faucet in turn until water is flowing freely.
Compressor, air tank, some tubes and hoses, something to control when to feed the compressed air into the cylinder(s), usually an extra cam per cylinder on the camshaft. valves to let the air through, an extra port into the combustion chamber, and a control valve regulating when to pressurize the starter system.
pressurize the system. that'll make the leak leak faster and you should be able to find it easier.