The automatic chain tension adjuster ensures a constant optimum chain tension. The system consists of three units: a power module and two tensioning units.
The power module distributes the pressure to the tensioning units, thus ensuring exactly the same pressure on both chains of the elevator. Furthermore, the power module holds some components for monitoring of the pressure and signals any error in the system.
The tension units consist of one cylinder each, which are mounted at the sides of the tension section and are connected to the shaft. By way of a constant pressure on the chains, the cylinder will keep moving to maintain the optimum tensioning, even if the chains are opposed to heavy temperature fluctuations causing an extension.