An installation for stowing inside a chamber , a device for covering and uncovering a surface using a cover element moved using a deployment/stowing system , the installation including: - a telescopic equipment guided in vertical movement inside the chamber, supporting, at least partly, the stowing/deployment system and provided with a roof for closing the chamber , this telescopic equipment being movable to occupy on the one hand, a retracted position in which the roof extends substantially at the peripheral range of the surface and on the other hand, an extended position in which the roof delimits above of the pit, a passage hatch for the cover element in view of covering or uncovering the surface; - a motorized system for vertically moving the telescopic equipment between its retracted position and its extended position; the motorized system includes: - a mechanism for automatically lifting the telescopic equipment permanently exerting on the telescopic equipment a lifting force to ensure its movement between its retracted position and its extended position; the stowing installation being characterized in that the motorized system further includes: - a controlled system for monitoring the lifting mechanism , including at least one motorized winch driving in rotation a drum ensuring the winding and unwinding of at least one sling acting on the telescopic equipment in order to monitor the lifting force applied by said lifting mechanism; - and a system control unit for monitoring the lifting mechanism making it possible to pilot the operation of the motorized winch in order to automatically switch the telescopic equipment from its retracted position to its extended position, and vice versa. - a telescopic equipment guided in vertical movement inside the chamber, supporting, at least partly, the stowing/deployment system and provided with a roof for closing the chamber , this telescopic equipment being movable to occupy on the one hand, a retracted position in which the roof extends substantially at the peripheral range of the surface and on the other hand, an extended position in which the roof delimits above of the pit, a passage hatch for the cover element in view of covering or uncovering the surface; - a motorized system for vertically moving the telescopic equipment between its retracted position and its extended position; - a mechanism for automatically lifting the telescopic equipment permanently exerting on the telescopic equipment a lifting force to ensure its movement between its retracted position and its extended position; the stowing installation being characterized in that the motorized system further includes: - a controlled system for monitoring the lifting mechanism , including at least one motorized winch driving in rotation a drum ensuring the winding and unwinding of at least one sling acting on the telescopic equipment in order to monitor the lifting force applied by said lifting mechanism; - and a system control unit for monitoring the lifting mechanism making it possible to pilot the operation of the motorized winch in order to automatically switch the telescopic equipment from its retracted position to its extended position, and vice versa. - a controlled system for monitoring the lifting mechanism , including at least one motorized winch driving in rotation a drum ensuring the winding and unwinding of at least one sling acting on the telescopic equipment in order to monitor the lifting force applied by said lifting mechanism; - and a system control unit for monitoring the lifting mechanism making it possible to pilot the operation of the motorized winch in order to automatically switch the telescopic equipment from its retracted position to its extended position, and vice versa. <EOS>