1, first connect the power supply, wall-mounted gas boiler power supply has usually been fixed, plug in.

2, then turn on the power supply, manually adjust the knob of the wall-hung boiler to the right position.

3, finally turn on the faucet or shower head in the house, the wall-mounted boiler will start automatically, the water flow will gradually become bigger, and when it is turned off, the water flow will become smaller and stop automatically.