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Machine Replacement — Frequently Asked Questions
What are the key benefits of replacing a geared machine with a PMSM gearless unit?
The primary benefits are energy efficiency (30–50% reduction in drive energy consumption via regenerative VFD), elimination of gearbox oil and its associated leak and disposal risks, significantly reduced noise and vibration improving passenger comfort, lower maintenance requirements due to fewer moving parts, and improved ride quality through precise VFD speed control. PMSM gearless machines also enable MRL conversions where headroom permits, freeing the former machine room space for other uses.
Does machine replacement require a new EN 81-50 conformity assessment?
Yes. EN 81-50 governs the design rules and testing requirements for lift components, and EN 81-20 §Annex E (Significant Modernisation) requires that any change to a safety-critical element — which the traction machine clearly is — triggers a re-assessment of the affected subsystems. The modernisation must be documented, and a new or updated Declaration of Conformity should be issued. TS EN 13015 further requires that a revised maintenance plan reflecting the new machine specifications be put in place before the lift returns to service.
Can a machine replacement project convert a machine-room elevator to machine-room-less?
In many cases, yes. Compact PMSM gearless machines can be mounted in the shaft overhead or on the guide rails, eliminating the need for a dedicated machine room. However, this requires a structural assessment of the available headroom (typically minimum 3.5 m above the top landing for EN 81-20 compliant MRL layouts), adequate pit depth, and verification that the existing shaft structure can carry the new machine loads. Turkish specialists on elevator.tr can provide feasibility assessments for MRL conversion as part of a machine replacement package.
How should seismic compliance be addressed during a machine replacement in Turkey?
Under EN 81-77 and Turkish AFAD regulations, any significant modernisation that alters the mass distribution or mounting configuration of the machine requires re-evaluation of the seismic category and the adequacy of the seismic restraints. This includes verifying anchor bolt capacity, machine bedplate design, and the correct setting of the seismic detection switch. AFAD-registered structural engineers can provide the updated seismic compliance certificate required for Turkish building permits and maintenance records.