In which direction is the heating switch turned on?

1. From the front of the heating valve, you can see that there is an "O" (the location is shown below), which is the abbreviation of the English word "open", which means open.

2. From the front of the heating valve, the letter "S" (see the position below) can be seen on the other side, which is the abbreviation of the English word "shut", which means closed.

3. When you want to open the heating valve, look at the valve from the front and turn it counterclockwise to open the heating valve.

4. After opening the valve in this way, check the on-off valve of the room heating, and open it counterclockwise when the heating is not hot.

5. Check the exhaust valve of each heater in the room and rotate it clockwise from the front to exhaust the air in the heater and promote the heating cycle. It can be finished at this time.