Section 28-5. Precautions in connection with the installation of carbon dioxide systems
a. the cylinders must be in place and properly fastened. Only one protective cylinder valve cap may be removed at any one time, should this be necessary for alignment purposes; b. installation of the carbon dioxide piping must be completed; c. other work in the carbon dioxide room must be completed; d. installation of the release cabinet with valves and locking facilities must be completed, e. the door to the carbon dioxide room must be fitted with a lock; f. the main valves’ ‘open’ and ‘closed’ position indicators must be checked by the work supervisor; g. the main valves must be set to the ‘closed’ position and locked.