Programming the Elevator Recall application is pretty simple using any of Fire-Lite`s addressable fire alarm systems. For example, to perform primary recall, the programmer simply I/O maps or assigns the SD355 addressable detectors that have been installed in the first floor lobby, equipment room and hoist way the same software zone as a CRF-300 addressable relay module that has been connected to control circuits on the elevator. These circuits are set up by the elevator contractor to move the car to its designated point of egress.
Secondary recall is accomplished in a similar manner when SD355’s are installed in the lobbies of all the other floors within the building are I/O mapped to the relay module or modules that sends the elevator car to the first floor point of egress.
In addition, the CRF-300 relay module can be I/O mapped to an addressable H355 fixed rate heat detector installed in a sprinkled elevator shaft. This is done to actuate the shunt trip which cuts the AC power off the elevator before the sprinkler in the hoist has a chance to activate. Heat detectors however are never used to initiate elevator recall unless the environment is deemed unsuitable for smoke detectors and the AHJ approves.
In addition, some AHJ`s may require that a smoke detector be installed in the hoist that has a sprinkler system head so that the smoke detector starts elevator recall before the heat detector or sprinkler system activates due to heat present in the shaft.
CRF-300s can perform other functions involved with elevator recall like illuminating and/or flashing the “Firefighter’s Hat” indicator and the audible sounders inside the elevator car. This is intended to alert firefighters that may be inside the elevator car manually controlling it that an alarm condition exists in the equipment room, elevator hoist or any other area that could dangerously jeopardize or affect the operation of the elevator car.
It should be noted that in practically all situations when using CRF-300 relays for elevator recall, the Fire-Lite programmer should remember to program them as “non-silenceable”. This assures that these relays can’t be stopped in the middle of their operation when the panel is silenced.
There are many aspects to elevator recall and how to implement it in the real world. Needless to say, it’s very important to have the right fire alarm system capable of performing all the necessary functions needed for a good Elevator Recall application. Installing a good elevator recall application also involves working closely in coordination with other contractors and trades people involved in the project/installation.
How is elevator recall performed in your jurisdiction? Let us know in the comment section below.
About the Author
Lynn Dudley is a NICET-Certified Technical Trainer for Honeywell Fire Systems. He joined Honeywell Fire Systems in 2003. Lynn conducts Fire-Lite Alarms training academies and programs at various locations around the country.