16+ Natural Gas Valve Lockout US. My led light is blinking 21 for gas valve lockout. High security gas cylinder lockout device safety gas tank valve loto safe lock out gate ball valve lockout.
After the system type is verified, the system's capacity must be determined.
A gas valve leak can emit natural gas or propane into the air and pose safety and environmental threats. High security gas cylinder lockout device safety gas tank valve loto safe lock out gate ball valve lockout. 7 blinks means unit is locked out it will stay locked out for one hour then try to light again it will try two times before lock out. • natural gas or liquid propane • inlet and outlet size • btu requirement • ignition method to be used • outlet.