Starting up the wall radiator correctly?

Good day to everyone,

As part of my new build, I also built a party room onto my carport. For this, a supply and return line for a conventional wall-mounted radiator were installed; the rest of the house has underfloor heating. Meanwhile, the radiator is also hanging on the wall and can be put into operation.

My question is whether the following procedure is correct:

I open the radiator's air vent valve and then the supply line so that the air can escape and the water can flow in. As soon as only water comes out of the vent, I close it. Then I also open the return line and refill water in the heating room to restore the optimal operating pressure.

It is a gas boiler.

Is this correct as described?

Thank you very much

First of all, we do not have a valve on the return line at the radiators.

Open valves on the radiator.

Connect the hose to the heater.

Open the valve slightly so that the hose is completely filled with heating water.

Then close the valve again and connect the hose to the water pipe.

Open the water tap and valve on the heater.

Open the bleed valve on the radiator, if it is not already open.

Bleed until no more air comes out. You can let a bit more water run out there.

Close the bleed valve.

Close the water tap and valve on the heater again. Having a second person to call out to so that they can do this is very convenient.

If necessary, adjust the pressure a little.

Remove the water hose.