Category Archives: Lynn Dudley

Elevator Recall Programming

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.​​

Why Elevator Recall? Because it saves lives.

Elevator Recall is an important Fire Alarm systems application for multi-story buildings. This application is designed to keep building occupants from entering the elevator car(s) when an evacuation is taking place due to a fire within the facility. Elevator recall also involves giving the firefighter or first responder manual control over the operation of the elevator during a fire emergency.

Unless the Authority Having Jurisdiction (AHJ) and/or fire department states otherwise, elevator recall is initiated by smoke detectors (like the SD355) installed in the lobbies of the building; the machine or equipment room; and the elevator shaft or hoist way. An exception might be if sprinklers are used in the entire building instead of smoke detectors.

Elevator recall begins by establishing two basic designated points of egress or evacuation. One predetermined point of egress is designated “Primary Recall” which is typically the first floor or main entrance to the building. The secondary or alternate point of egress is any other floor within the facility that is usually designated or determined by the AHJ.

The application works such that if any smoke detector in the first floor lobby, elevator equipment room or hoist way responds with an alarm, then “Primary Recall” is initiated. This means the elevator car is sent from the first floor to a designated secondary floor within the building.

On the other hand, if smoke detectors in the lobby of any other floor go into alarm then the elevator car will move from whatever floor it is currently on to the first floor point of egress. This is referred to as secondary or alternate recall.

Under both operations (once the elevator reaches its point of egress) the elevator car door is automatically opened to let any passengers that may be inside exit. Once this happens, the elevator is shutdown or taken out of service to prevent any further public access.

In my next blog I’ll go over some simple programming for elevator recall functions.

 

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.​​

Fire Alarm System Duct Smoke Detectors Can Save Lives

Building, fire and life safety codes for many local jurisdictions require the installation of duct smoke detectors in heating ventilating and air conditioning systems (HVAC). These local codes typically follow NFPA 90A and the National Fire Alarm Code for specific design, installation, and maintenance guidelines.

The HVAC Shutdown application generally occurs when a duct detector like the D355PL is installed in the return air ducts of an HVAC system for the purpose of sensing any presence of smoke due to a fire.  An addressable fire panel like Fire-Lite’s MS-9200UDLS uses the CRF-300 control relay module to shutdown the respective air handlers or fans and close dampers to prevent the spread of toxic smoke throughout the facility.

Some buildings may require additional functions to be triggered in tandem with the shutdown of the HVAC system. Typical applications might include elevator recall or doors that are released or unlocked magnetically. All of these actions may take place in response to an alarm condition in a facility.

Many well thought-out decisions have to be made on the use of duct detectors based upon the anticipated or likely presence of smoke within a building. Whether the smoke or fire is outside in an area that may happen to be close to a fresh-air inlet –or whether smoke originates within the HVAC system itself.

Although fire alarm system duct detectors can and should never be used as a substitute for area spot smoke detectors, they nevertheless can play a huge role in preventing injury, protecting property and saving lives by reducing the spread and recirculation of deadly smoke.

Duct detectors are installed by fire systems technician or sometimes by the HVAC installer. Who typically installs the duct detectors in your jurisdiction?

 

About the Author
Lynn Dudley is a NICET-Certified Technical Trainer for Honeywell Fire Safety. He joined Honeywell Fire Systems in 2003.  Lynn conducts Fire-Lite Alarms training academies and programs at various locations around the country.​​

Is an Unmonitored Sprinkler System Good Enough?

Is having an unmonitored sprinkler system enough for a commercial building? I think not! Isn’t supervising a sprinkler system for integrity the core of what an effective life safety solution is all about?

Occasionally the question will come up:  If a building has a sprinkler system and that’s all that local code requires, do you really need a fire alarm system installed as well?  Some local jurisdictions state that for newly constructed buildings, a fire alarm system isn’t necessary if you have a sprinkler system.  But think about it. Most injuries and deaths related to fire are due to smoke inhalation. While the sprinkler system will save the building, a fire alarm system will save the building occupants.

Also, what happens if the sprinkler system is malfunctioning or is not operational? For instance, the water supply can freeze on a wet pipe system, or even worse, can be shut off without you or the facility manager knowing it. When you think about it, it makes good sense to invest in a fire alarm system to not only provide detection of fire and the deadly smoke it can produce, but to provide an efficient means of monitoring the sprinkler system for the proper operation of critical functions.

Fire-Lite’s fire alarm systems can monitor critical sprinkler system functions, such as pressure tanks, water pumps, and temperature devices for integrity and proper operation. Fire-Lite’s addressable modules like the MMF-300 monitor and MDF-300 dual monitor module can be installed near the monitored equipment and connect to the SLC in order to monitor waterflow devices for alarm signals. Also, the modules can monitor tamper switches like the Post Indicator Valve (PIV) and/or the Outside Stem and Yoke (OSY) valve for any off-normal, supervisory condition on a wet pipe sprinkler system.

It also goes without saying it’s critical that a good fire alarm system installer be familiar and be trained on the operation of sprinkler systems of various types, not to mention be well aware of local code requirements. For instance, knowing whether or not the services of a separate remote supervising company are required in addition to fire alarm systems monitoring is very important.

This can present an opportunity when faced with a building protected by an unmonitored sprinkler system. In addition, it can allow you to expand upon the many things you can offer as a fire alarm system installer, along with the many life safety advantages of having sprinkler systems monitored by fire alarm systems.

 

 

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.​​