Duct Smoke Detector for Infinity, Evolution, or Ion Controls

[@WealthyRoots]

For Everyone wondering how to hook this up to a legacy (old) tstat. I just spent the last 6 hours troubleshooting. I'm not an electrician or HVAC professional, but this is what worked for me. In my area (Toronto, Canada ), inspectors want to see the smoke detector cut off the furnace's main power. You can do this in 3 ways. Tie into the furnaces wall switch, door switch or main fuse. I went with the wall switch because it was near my furnace, and I didn't want to splice any wires in my furnace. 1st turn off the breaker 2nd wire constant 120v to the 120v terminals on the d4120. You can grab this off the wall switch if available or any nearby plug. Don't forget to connect ground to the ground terminal also. 3rd wire another 120v line from the comm and NC aux contact off the D4120 and send it to the furnace wall switch. 4th, unplug one of the leads off your furnace wall switch and marette it to the lead coming from NC. 5th take the lead coming from COMM and attach it to the furnace wall switch. 6th have a drink because you just saved yourself 5 and half hours of work. Turn everything on and test The smoke detector will now act like another wall switch and cut main power to the furnace. Just like if you went to your furnace switch and switched it off. Pretty straightforward now that I know, but God it's so hard to find information online about this. Btw I used 2 14/2 bx wires for this but I'm sure you can do it with 1 14/3 bx wire if you grab power and switched off the same wall switch but I didn't have any 14/3 bx. Again I'm not an Electrician or hvac professional. Best of luck

[@TECTubefilms]

The manufacturer of the detector in our video (System Sensor) has a 1-hr webinar on smoke detection if it helps anyone. kzbin.info/www/bejne/gJmshHlumdSHd7c

[@mikec5644]

Thank you Mike you saved my day. And I indeed had a coffee while watched it all worked.

[@liyuanshi2377]

@@TECTubefilms This webinar didn't say anything about how to wire 😂

[@yusufwong4786]

That didn’t work maybe i did something wrong but if I use the feed of the furnace switch I will back feed the circuit. If I use the return of the furnace switch the furnace won’t turn one.

[@majddawood3233]

Make a video of that please its so hard to do it by just reading

[@IBH020]

Saved my day today with the wiring, I was super confused until I came across your video… much appreciated!

[@ivandiaz86]

The air flow is supposed to hit the intake sampling tube first with the exhaust tube down stream. I'm pretty sure you should of turned the duct detector 90 degrees on that vertical duct so the tubes line up vertical. The way you installed would be ideal on a horizontal duct run

[@TECTubefilms]

We understand your logic, but that is not a requirement of the installation. So long as the holes of the sampling tube are facing into the airflow, the pressure difference will be created to move air thru the assembly. With the air entering directly into those holes, you have velocity pressure on the sampling tube but not on the exhaust tube.

[@123qatar7]

It's installed in supply or return duct ? ​@TECTubefilms

[@trendworthytop10]

Thanks this made my day easier

[@randallbaker4293]

Thanks for clear instructions! I have a DNR. What is the purpose of the rectangular magnet that is included?

[@TECTubefilms]

The magnet is to trip the relay so the installer can verify correct wiring.

[@randallbaker4293]

@@TECTubefilms Thanks for the information. I assume any strong magnet will work.

[@TECTubefilms]

@@randallbaker4293 Any magnet strong enough...

[@deathvalley1477]

@@randallbaker4293 each speaker strobe has a magnet. In case of emergency , i breake the speaker and use the magnet on the back. Is super powerful. 3 seconds and you activate an alarm on duct and smoke detectors

[@randallbaker4293]

@@deathvalley1477 Thanks!

[@mehdiabarghooei974]

That's great can you explain about how to connect to fip panel by plc thanks mate

[@jrancourt7172]

Hey man, you did a great job in explaining everything in simple terms. However, what if i do not have one of the digital screens you use at the end of the video to finish your setup? Will the furnace not act automatically if wired properly? Thanks

[@TECTubefilms]

This particular feature is a feature of the communicating wall control. If you just have a standard 24v thermostat, then you would need to wire this differently.

[@jrancourt7172]

@@TECTubefilms do you have a video showing how to wire it differently with a regular wall thermostat?

[@TECTubefilms]

@@jrancourt7172 No, we do not have a video for that scenario

[@altyndom7039]

When a furnace is new they got an oil coating which gives off smoke when the furnace is on for the first time.

[@TECTubefilms]

True

[@rodb2672]

Commercial code requires the detector in the return duct. Is the a reason or code for residential to mount it in the supply duct? Thanks

[@TECTubefilms]

Different commercial building codes have different requirements: IMC - requires RETURN duct smoke detection for 2,000 CFM (if over 15,000, then both return and supply are required) NFPA - requires SUPPLY duct smoke detection for 2,000 CFM (if over 15,000, then both return and supply are required) Note: if your jurisdiction follows both IMC and NFPA, then above 2,000 CFM you need both a supply and return detector

[@TECTubefilms]

There is some logic to putting it in the return on a commercial system. When the RTU is in full economizer mode, a fire in the building would not bring smoke back to the detector if it was located in the supply duct. There is also some logic to putting it the supply. If the fire is inside the air handler, such as an electrical issue with the motor, then a return smoke sensor won't see that.

[@TECTubefilms]

In this video, we put it on the supply duct because we do not have much return duct on the systems in our labs. It is just 90 degree elbow and 2 feet of duct. In his own house, Ryan has the smoke detector installed on the return.

[@rodb2672]

Thanks for the feedback. Could you give me your opinion on my video for my patent for residential fire protection. Furnacefaninterrupter

[@franciscosunworld]

Great video..thanks a lot

[@TheIceman101]

Good video but I would go into a little more detail on what the terminals the do such as if smoke is present then what contacts will open or close because there are different detectors out there.

[@TECTubefilms]

We are not exactly sure what you are asking. Other than shutting the furnace down, is there something else you are trying to accomplish related to smoke detection?

[@TECTubefilms]

If you are just looking for general knowledge on the System Sensor detector we used in the video, you may find something useful on their channel at kzbin.info

[@randomdude5968]

I just installed one this smoke detectors , I Jamie a jumper wire drone the 9 to 6 and then I connect a wire from 16 to my thermostat wire , do you think that would work ?

[@DreamCoreProperties]

What type of wires are you using ??

[@TheMontanasv6]

great information! BTW, would you please share how to wire to existing wired smoke alarm for interconnect purpose? thanks a lot

[@TECTubefilms]

Are you talking about a duct mounted smoke detector or a ceiling mounted one?

[@TheMontanasv6]

@@TECTubefilms I would like to see if we could interconnect Duct Smoke Detector with Smoke Alarm? How to do it if possible? Thanks

[@TECTubefilms]

@@TheMontanasv6 You may be able to do it, but you should not. They serve two different functions for compliance with two different codes. The duct smoke detector's job is to shut down the HVAC fan system so smoke is not distributed throughout the building. Teh ceiling detector's job is to notify the occupants.

[@TECTubefilms]

@@TheMontanasv6 Wait... are you trying to connect the duct smoke detectors to the ceiling smoke alarms or are you trying to connect it to a fire alarm panel? If the latter, consult the panel manufacturer. They may be able to use standard detectors, but they may also require communicating style.

[@TheMontanasv6]

@@TECTubefilms yes, it is residential house, I am trying to connect the duct smoke detectors to the ceiling smoke alarm. Is this a code required in Ontario?

[@Big0veralls]

I see you mounted the sampling and exhaust tubes on the same plane. I have mounted them like this as well but after reading the cut sheet it says “the unit can be mounted vertically”,which I would assume would be for a vertically run duct like you have here, “ as long as the exhaust tube is downstream of the sampling tube”. My question is have you ever used a manometer to test if the differential pressure is where the cut sheet says it should be. Basically I’m asking does it really matter if the exhaust tube is downstream or not? Without testing with a snow bomb or manometer it’s hard to say. The jobs I’m on I can test the operation yet because the units will be shipped to site without being completely functioned tested.

[@Big0veralls]

Never mind. Decided to call tech support and they said it would work fine like this.

[@TECTubefilms]

Ryan explained it in the video, but the orientation of the holes on the sampling tube is what matters and what forces air into the chamber. The orientation of the exhaust tube and of the controller itself does not make a difference.

[@Big0veralls]

@@TECTubefilms yeah I get that and basically what tech support said confirming what I already know to be the case. The thing is when the literature doesn’t spell it out as such and you get an over zealous QA/QC guy at a place like I’m at right now it can be hard explaining it to them. I have one right now telling me it needs to be in the center of the duct and since it’s redundant with two on the supply and two on the fresh air intake duct that they should be offset instead of inline with one another etc. The two are on the same plane on a horizontal duct about 6” higher than center on a 18” tall duct. Plenty of air flowing across it. But he wants to argue we need to drop one down to cover more of the duct. I just said you waited until 23rd out of 26 systems to bring it up. They’ve all been signed off so the end user or the company we work for will be paying for any changes any of the other systems that have duct smokes not directly in the middle. Still waiting to see what comes of that. I’m installing these for our fire system. Mechanical was lucky enough not to have to mess with it.

[@carlosgerman2408]

I am interested in Commercial applications. Does the smoke detector could be reset from a Building Automation System or code requires manual reset? In my case, we have a smoke evacuation that would purge the smoke in the space. Thanks!

[@TECTubefilms]

Duct smoke detectors in commercial applications are regulated by both NFPA and IMC. It is probable that manual reset is required by code. Unrelated to code, you may be able to reset from a BAS. Most duct smoke detectors have an option for remote reset... although it is usually a keyed switch, not a BAS. Something like this www.systemsensor.com/en-us/Pages/RTS151KEY.aspx Although, we do not think anyone is going to want the liability of resetting a smoke detector remotely from a BAS. They are going to want someone to physically go into the space and visually verify that the fire event is over.

[@edryantoniocubacontreras2839]

friend I am trying to install one like this in an air handler unit, but it does not work, has a different way to install it? you can help me with that

[@TECTubefilms]

What is the brand and model of the duct smoke detector? What is the brand and mode of the AHU?

[@NC-ic9tg]

Hi tech, I just followed all your steps for wiring on system sensor on carrier brand furnace. But is does not shut down flame and fan motor at all.i have eco bee 3 stat. Any other help

[@TECTubefilms]

You would not be able to follow all of the steps we showed in this video if you have an ecobee. It would not have any of the screens we show in the video to enable and configure this feature. These instructions are for Infinity, Evolution, and Ion wall controls. This does not apply to standard 24v stats like ecobee. In the case of regular thermostats, you can still wire the smoke detector for shutdown the traditional way by interrupting power. You will not get alerts emailed or text messaged out to you though.

[@Truthh4040]

I followed all the steps now I’m stick at the thermostat how did u enter that set up part . I have same thermostat same modeling But I can’t go into installation and set up

[@TECTubefilms]

The setup screens are only to be accessed by the HVAC contractors. If you are the homeowner, that is probably why you don't have the access level needed to get it.

[@rajeshprayas9930]

How do System sensor programing stalletion

[@blakebeehler3392]

How do you wire this to a standard two stage non communicating furnace?

[@TECTubefilms]

You can either interrupt the low or high voltage power circuit for the furnace.

[@blakebeehler3392]

@@TECTubefilms thanks for quick reply, so if I Run the R through detector (NC and C) and power detector with independent 120V it should do the job?

[@TECTubefilms]

@@blakebeehler3392 The System Sensor duct smoke detector that we used in the video can be powered with either 24vac or 120vac. The contact can also handle either 24vac or 120vac. We prefer to do everything in low voltage whenever possible to avoid the need for conduit.

[@shaminderkhokhar4434]

I do have amber light blinking from start

[@shaminderkhokhar4434]

Everything working but amber instead of green

[@shaminderkhokhar4434]

Plz advice

[@severinofilm.2819]

Good video thanks you !!!!

[@celsojoven3525]

Shop wise

[@severinofilm.2819]

Teacher I need to know what is the model number for this smoke detector. Thanks you

[@TECTubefilms]

That one was a D4120 but most duct smoke detector models will work the same in this application

[@johnthomas5786]

What is the model number of the smoke detector?

[@TECTubefilms]

D4120

[@alexconcord3597]

Hi What is the alternate wiring in case of standard thermostat?

[@TECTubefilms]

You will need to wire the duct smoke detector's normally closed contact to interrupt 24v or 110v power. It would be the same as installing it on a commercial RTU or AHU.

[@alexconcord3597]

@@TECTubefilms Thanks for your kind reply. I didn't understand RTU or AHU. My furnace is Carrier Infinity 96 and has similar panel you show in video. My thermostat is standard and has limited setting options. When I followed your wiring, the SD is not communicating with flame panel. I think, I should connect the ALARM to the panel, but I am not sure to which terminals. Could you please provide me with your advice? I already connected the device to 110 VAC and it is powered on and I just need to identify the terminals and contacts on both sides.

[@TECTubefilms]

@@alexconcord3597 RTU and AHU are acronyms for commercial HVAC systems where duct smoke detectors are often required by code if 2,000 CFM or higher.

[@TECTubefilms]

@@alexconcord3597 Which exact thermostat do you have?

[@TECTubefilms]

@@alexconcord3597 For the wiring at the smoke detector, it is the same normally closed contact for all HVAC applications regardless of thermostat type. If you have a standard 24vac thermostat instead of a communicating Infinity thermostat, then the wiring at the furnace will be different. Instead of wiring to R and G as a programmable input, you must use the smoke detector relay to interrupt 24vac or 110vac power to the furnace.

[@Robert-sf3uz]

Safety glasses.. check. Gloves.. check. Just saying.