In case of an alarm the user should carry out the following actions, not necessarily in this order:
- Do not switch on or off any electrical equipment, including gas detection apparatus.
- Extinguish all naked flames, including all smoking materials.
- Turn off all gas appliances.
- Turn off the gas supply at the gas main control.
- Open doors and windows to increase ventilation.
- Do not use the telephone in a building where the presence of gas is suspected.
- If the alarm continues to operate and the cause of leak is not apparent and/or cannot be corrected, vacate the premises and IMMEDIATELY NOTIFY the gas supplier and/or the gas emergency 24 hour service in order that the installation may be tested and made safe and any necessary repair carried out.
- If the alarm stops and the reason for the alarm having operating is identified, (for example a gas tap switched on with the burner unlit), after stopping the gas release and ensuring all appliances are turned off, the main gas supply may be reinstated.
- However, even if the gas detector is fitted with a triggering device, for example for closing a solenoid valve on the incoming gas pipe, the same procedure as described above should be followed.