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Pitagora 4.0 – Fire service operation


The system has the following inputs for firefighters’ operations:

  • POM input (key of floor): closing towards GND (NC / NO) I = 5mA
  • CPOM input (elevator key): closing towards GND (NC / NO) I = 5mA

Reference standards

EN81-72:2015 – Firefighters lift (Europe)

The EN 81-72 standard establishes the safety rules for the construction and installation of lifts with particular reference to fire-fighting lifts.
• The standard applies to all new installations inside new buildings.
• The “Firefighter” Lift is a lift for normal use, with some special requirements for use by firefighters in the event of a fire.

D.M. 15/09/05 – Rescue lift (only for Italy)

The rescue lift can only be used for the transport of equipment and for the evacuation of people, it is therefore not a lift in normal service.
It only provides manual doors in the elevator car and at floors.
The elevator car door must have one or more sliding leaves.
Hydraulic operation is not allowed.

EN81-73

Safety rules for the construction and installation of lifts. Particular applications for passenger and goods passenger lifts Behaviour of lifts in the event of fire

Firefighters operation

Phase 1

Firefighters key switch to “1”

  • All car/floor existing calls cancelled.
  • Call buttons and light barriers disabled (except Alarm & Door Open).
  • Car priority recall to fire service access level and parking with door open.
  • Interphone communication system activated.
  • Shaft and machine room lighting activated.

Phase 2

Firefighters in the car

  • Priority mode: only one call at a time, any new call cancels the previous one.
  • When car is stationary at landing, doors can be opened by applying constant pressure to Door Open button.
    If pressure is released before doors are fully open, doors re-close automatically.
  • Car shall be returned to the fire service level by switching the firefighters switch to “0” and (within 5 sec.) back to “1”.

Elevator car

Elevator car firefighter key switch (if present), switched to “1” allows to initiate elevator car movement in Phase 2, switched to “0” keeps the elevator car parked with doors open.

To revert the lift to normal service, all firefighters key switches must be returned to “0” and car must be returned to fire service access level

Fire operation programming procedure

Here you can set the parameters for firefighting operations according to 5 different cases.

Case 1 – One Firefighters key only (at floor)
Using these settings and once the fire-fighters key at fire-fighters floor has been activated (input POM), the elevator will go to the programmed floor, open the doors and turn off the Landing Operation Panels (PHASE 1); The Car Operating Panel remains in operation. The operation ends when the elevator arrives at the programmed floor and the fire-fighters key is turned to ‘off’ condition.

Enter the menu “SPECIAL FUNCTIONS” submenu “FIREFIGHTERS” and set:
• The floor where the fire-fighters key is located
• The Access (if there are multiple doors)
•The stand-by state of the key switch contact (NO or NC); in case of NC contact the CPOM input of TOC box must be shunted.
• The operation EN 81-72 (a)
Case 2 – Two firefighters key switches (at floor and in the elevator car)
Using these settings and once the fire-fighters key at the fire-fighter floor has been activated, the elevator will go to the programmed floor (PHASE 1), open the doors and turn off the Landing Operation Panels. The Car Operating Panel remains in operation but only after the fire-fighter key in the CAR (input CPOM) has been turned on. The operation ends when the elevator arrives at the programmed floor and the fire-fighters keys are turned to ‘off’ condition.

Enter the menu “SPECIAL FUNCTIONS” submenu “FIREFIGHTERS” and set:
• The floor where the fire-fighters key is located
• The Access (if there are multiple doors)
• The stand-by state of the key switches (NO or NC)
• The operation EN 81-72 (b)
Case 3 – External fire contact for fire detection with one contact only
Using these settings and once the contact is activated by the external fire contact, the elevator will go to the programmed floor, open the doors and remain stopped (PHASE 1). The Landing Operation Panels and the Car operating Panel are disabled. The reactivation of the elevator will take place at the deactivation of the contact from the external fire contact.

Enter the menu “SPECIAL FUNCTIONS” submenu “FIREFIGHTERS” and set:
• The floor where the elevator must go in case of direct activation of the contact from the external fire contact
• The Access (if there are multiple doors)
• The stand-by state of the contact of the external fire contact (NO or NC) . If there are programmed contacts of NC type the input CPOM of TOC box must be shunted
• The operation EN 81-72 (b)
• Connect the contact to the POM input of the controller
Case 4 – External fire contact with one contact and one firefighters key only (at floor)
The activation of this input will start PHASE 1 of the operation (also called evacuation) and will not allow elevator car calls without the activation of the fire-fighters key-switch. Using these settings and once the contact has been activated by the external fire contact, the elevator will go to the programmed floor, open the doors and remain stopped (PHASE 1). The Landing Operation Panels are disabled and the Car operating Panel remains in operation but only after turning on the fire-fighters key at the floor (input POM). The reactivation of the elevator will take place, (bringing the elevator to the programmed floor), by turning off the key and deactivating the contact from the external fire contact.

Enter the menu “SPECIAL FUNCTIONS” submenu “FIREFIGHTERS” and set:
• The floor where the fire-fighters key is located
• The Access (if there are multiple doors)
• The stand-by state of the key switch and of the external fire contact (NO or NC)
• The operation EN 81-72 (b)
• Connect the wiring as indicated in the electric diagram: the contact from the external fire contact must be connected to the input CPOM of the TOC box.
Case 5 – External fire contact with one contact and two firefighters keys (at floor and in the elevator car)
The activation of this input will start PHASE1 of the operation (also called evacuation) and will not allow elevator car calls without the activation of the fire-fighters key-switch in the elevator car.
Using these settings and once the contact by the external fire contact OR the key at floor has been activated, the elevator will go to the programmed floor, open the doors and remain stopped (PHASE 1). The Landing Operation Panels are disabled and the Car Operating Panel remains in operation but only after the fire-fighter key in the CAR (input CPOM) has been turned on. The reactivation of the elevator will take place, (bringing the elevator to the programmed floor), by turning off the fire-fighter keys (at the floor and in the elevator car) and deactivating the contact from the external fire contact.

Enter the menu “SPECIAL FUNCTIONS” submenu “FIREFIGHTERS” and set::
• The floor where the fire-fighters key is located
• The Access (if there are multiple doors)
• The stand-by state of the key switches and the external fire contact (NO or NC)
• The operation EN 81-72 (b)
• Connect the wiring as indicated in the electric diagram: the contact of the external unit must be connected together with floor key switch POM (in serial for NC contacts, in parallel for NO contacts).

Updated on 13 Settembre 2022

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