Section 28-8. Precautions in connection with repairs and inspections of carbon dioxide systems

Before starting any repair and inspection work in rooms protected by a carbon dioxide extinguishing system,
  1. a.
    the release mechanism for these rooms shall be effectively secured so that panic release of the system is not possible;
  2. b.
    the system shall be locked by closing and locking the main valves and, if applicable, the distribution valves;
  3. c.
    if the main valves of a system cannot be locked in the closed position, the system shall be secured by installing a spectacle flange on high-pressure pipes before or immediately after the main valve and setting it to the closed position.