Ventilation before use
Open the window enough to vent

Check flame during use
Check the blue flame

Valve lock after use
Lock the combustor cock, intermediate valve and meter while go out for long term

Normally
Bubbles check every month more than once every month!

On vacation
Be sure to lock the main valve when you go on vacation!

Leakage
1. Lock cock, intermediate valve, main valve.

2. Open windows and doors to ventilate.
[Do not use electric appliances]

3. Contact customer center and use after checking.