BS 81-73 pdf free download

BS 81-73-2016 pdf free download.Safety rules for the construction and installation of lifts — Particular applications for passenger and goods passenger lifts Part 73: Behaviour of lifts in the event of fre.
5.1.4 Manual recall device
Where a manual recall device is provided, it shall be
a) bi-stable in operation,
b) provided with clear visual indication on which position the switch is to avoid any error about its position,
c) appropriately marked for its purpose. When accessible to all, the size of the sign shall be at least 50 mm and according to EN ISO 7010, P020 “Do not use lift in the event of fire” without text,
d) located in the management centre of the building or at the designated landing, and
e) protected from misuse e.g. by placing it behind a glass panel or located within a secure area. When accessible to all, special tool is needed to reset. See Introduction.
5.1.5 Reaction of stopped lift
Where a lift is stopped due to a fault condition, a signal from the recall means to the lift control system shall not initiate starting of the lift.
5.1.6 Prohibition sign
A prohibition sign according to EN ISO 7010, P020 “Do not use lift in the event of fire”, shall be displayed near the lift so that it is easily seen on all landings. The size of this sign shall be at least 50 mm.
The following text may be added to the sign “Do not use lift in the event of fire”.
5.2 Interface requirements between the recall means and the lift control system
Interruption of the interface connection shall initiate the fire recall of the lift as described in 5.3.
5.3 Behaviour of the lift on the receipt of a signal from recall means
5.3.1 General
The principle of the reaction of the lift in the event of fire is to return the car to a designated landing and allow any passengers to exit.
Input signals from recall means shall not override any of the following:
a) the electric safety devices;
b) the inspection operation (EN 81-20:2014, 5.12.1.5);
c) the emergency electrical operation (EN 81-20:2014, 5.12.1.6);
d) the behaviour of the lift in seismic mode (EN 81-77);
e) the remote alarm system.
5.3.2 When a signal is received from the recall means the lift shall react as follows:
a) all landing controls and controls in the car shall be rendered inoperative and all existing registered calls shall be cancelled;
b) the door open and emergency alarm buttons shall remain operative;
c) an audible signal shall sound on the car and in relevant machinery spaces immediately and while the lift is under inspection operation, emergency electrical operation or any maintenance control. The sound level of the audible warning shall be adjustable between 35 dB(A) and 65 dB(A), initially set at 55 dB(A). The audible signal shall be cancelled when the lift is removed from inspection operation, emergency electrical operation or any maintenance control;
NOTE Maintenance controls include, but are not limited to, the following functions:
— prevention of movement of lift after the opening, by the use of a key, of any door providing access to the pit;
— prevention of movement of lift after return to normal operation of the lift from pit inspection station;
— protection for maintenance operations; or
— landing and car door bypass device(s).BS 81-73 pdf download.