Here is what we have for you today. This video shows a quick clip of some conventional System Sensor duct smoke detectors installed within the rooftop HVAC unit. However, the previous fire alarm contractor thought it would be a good idea to run a standard 18 awg (American wire gauge) 2 conductor PVC cable open wire across the rooftop from unit to unit. They drilled a hole in the side of each HVAC roof top unit and proceeded to run this PVC cable across the roof and tied them directly to the addressable module for each System Sensor duct smoke detector. This was obviously done because the contractor was one of two things: 1 he was to lazy to get a scissor lift below the deck and find the problem, or 2 he was just not competent enough to resolve the issue without pulling off this nightmare. You be the judge!
Showing posts with label system sensor duct detector. Show all posts
Showing posts with label system sensor duct detector. Show all posts
Wednesday, June 19, 2013
SLC Circuit for Duct Detectors Done the Easy Way
Okay we are back to the amazing installation practices that some fire alarm and security companies will perform to lower their labor time and land the job. However, after you will see in this amazing video you will wonder how some of these companies get away with it. And if they are doing these installs after the acceptance test, then how are they living with themselves? Better yet, how does the customer not make themselves aware of what they are paying for? Words cannot express the frustration that myself and other competent contractors feel when they see installs like this.
Here is what we have for you today. This video shows a quick clip of some conventional System Sensor duct smoke detectors installed within the rooftop HVAC unit. However, the previous fire alarm contractor thought it would be a good idea to run a standard 18 awg (American wire gauge) 2 conductor PVC cable open wire across the rooftop from unit to unit. They drilled a hole in the side of each HVAC roof top unit and proceeded to run this PVC cable across the roof and tied them directly to the addressable module for each System Sensor duct smoke detector. This was obviously done because the contractor was one of two things: 1 he was to lazy to get a scissor lift below the deck and find the problem, or 2 he was just not competent enough to resolve the issue without pulling off this nightmare. You be the judge!
Here is what we have for you today. This video shows a quick clip of some conventional System Sensor duct smoke detectors installed within the rooftop HVAC unit. However, the previous fire alarm contractor thought it would be a good idea to run a standard 18 awg (American wire gauge) 2 conductor PVC cable open wire across the rooftop from unit to unit. They drilled a hole in the side of each HVAC roof top unit and proceeded to run this PVC cable across the roof and tied them directly to the addressable module for each System Sensor duct smoke detector. This was obviously done because the contractor was one of two things: 1 he was to lazy to get a scissor lift below the deck and find the problem, or 2 he was just not competent enough to resolve the issue without pulling off this nightmare. You be the judge!
Sunday, May 19, 2013
Wow System Sensor D4120 Duct Detector is Now Fixed
A while back I posted on the new System Sensor D4120 duct smoke detector. I stated that although a great improvement on the previous DH100 series it did have one major flaw. The System Sensor D4120 duct smoke detector would open the supervisory contact when powered up causing a trouble condition at the main fire control panel every time the end user or tech performed a reset. This was a major deal especially when you have a new high rise with over 60 of these new System Sensor D4120 duct detectors. The AHJ (authority having jurisdiction) typically does not understand why the fire control panel starts receiving 60 troubles when you reset the system.Our tech department has been contacting System Sensor for months (ever since this device came out) trying to get an answer as to why they did this.
Well I am happy to report that System Sensor finally listened and has corrected the issue. Now when power is restored to the D4120 the supervisory contact will close immediately. Great job System Sensor with what we can now call another awesome product.
Read more from System Sensor here.
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