A check list for modernizations and quotations 21 common thread of both standards is that the assessment of the safety level of the lift, following a modification, must take into account the safety guaranteed by the modified component, the safety level of all the components affected by the modification and the overall safety of the modified lift. Please note that all requests for clarification issued by UNI and referring to previous editions are outdated and that both rules may not be applied for up to one year from the date of their publication, for orders formally approved until 29 September 2021. What are the main points of UNI 10411-1: 2021 and UNI 10411-2: 2021?The two tables below, which are essential and not complete, present the most relevant aspects of the two regulations, in light of the innovations introducedby the newedition.Thiswork, carriedout by engineer Corradini, is intended to represent a sort of checklist to keep in mind when modernizing a lift or to verify the completeness of a quote. It goes without saying that for a correct application of the rules, it is necessary to read and study their complete text. The AGUIDEwiththemostrelevantaspectsofthetwoUNI 10411-1:2021andUNI 10411-2:2021standards Guide to UNI 10411-1: 2021 Part 1: Electric lifts not compliant with the Lift Directive Chapter Topic Main points 5 Variation of the load on the supporting structure • In case of variation of the load on the load-bearing structures, their suitability must be checked 6 Static load variation • For load variations higher than themaximumvalues shown in in table 1 of the standard, it is necessary to: - Verify the safety coefficient of the ropes - Check bearing structures - Install of suitable shock absorbers under the cab - Verify suitability of cabin guides - Check parachute suitability - Check status of the limiter unit - Check status of the frame (arch) - Checkmachine status - Install a load control device - Install the device for controlling the excess speed of the car when going up - Install rigid guides to the counterweight - Install a pit defence to protect the area covered by the counterweight - Evaluate precautions in the case of accessible spaces located under the well • For loadvariations higher than themaximumvalues shown in table 2 of the standard, it is necessary to: - Install suitable shock absorbers under the counterweight - Check the status of counterweight guides - Evaluate precautions in the case of accessible spaces located under the shaft 8 Relocation or modification of the machine room • In case of displacement or modification of the machine room: - Maintain exclusive use - Evaluate resistance of walls, ventilation, lighting - Problem shifting of materials - Need for metal protections on rotating parts - Switch panel regularization - Regulatory maintenance spaces - Accessibility through an easy and safe direct route 11 Control panel Replacement • The replacement of the control panel requires: - Installationof thebidirectional communicationdevice inaccordancewithUNIEN81-28 - Installation of emergency lighting on the cabin roof - Installation of the engine power time limiter - Replacement of the power lines if the conductors are not marked - Action to bring into compliance and/or replacement of locking devices for both swing doors and sliding doors - Installation of the device for controlling the excess speed of the car when going up - Ensure the car’s stopping accuracy at the landing - Intheabsenceof theprotectiondeviceagainstuncontrolledmovements, thebrakeunitmusthave independentmechanical elementsandadevicemust control theopeningmovement - Removal of the ALT button except for systems without car doors - Installation of the emergency stop button within the distance of 1 m from the machine
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