MTB Luvr Posted July 26, 2011 Share Posted July 26, 2011 Hello all,As an extension to a prior thread, how can I have the system change the HVAC settings based on outdoor temperature? For example, run the air exchange fan while the A/C is running but only when the outdoor temperature is less than 80 degrees?TIA. Link to comment Share on other sites More sharing options...
well_armed Posted July 26, 2011 Share Posted July 26, 2011 If you had a C4 thermostat mounted outside, I dont see why not.I have a slightly used one you can buy if interested for testing... Link to comment Share on other sites More sharing options...
MTB Luvr Posted July 26, 2011 Author Share Posted July 26, 2011 Thanks, but I was hoping someone knew a way to do it using the "internet" temperature that's displayed on the navigators. The fact that the system knows the outside temperature leads me to believe that there is a variable for it somewhere, I just can't figure out where. Link to comment Share on other sites More sharing options...
Matt Posted July 26, 2011 Share Posted July 26, 2011 Currently, there isn’t any way to program based off the default “outside temperature”. In my circumstances, I use a CA device and program off the temperature on that. Link to comment Share on other sites More sharing options...
tebery Posted July 26, 2011 Share Posted July 26, 2011 Hello all,As an extension to a prior thread, how can I have the system change the HVAC settings based on outdoor temperature? For example, run the air exchange fan while the A/C is running but only when the outdoor temperature is less than 80 degrees?TIA.Is your 'air exchange fan' an ERV unit? If so how are you using C4 to control it? Link to comment Share on other sites More sharing options...
MTB Luvr Posted July 26, 2011 Author Share Posted July 26, 2011 No, I have a Venmar unit. I'm planning on using a standard 120v C4 plug switch to turn it off and on. I was hoping to do it using outdoor temperatures, but for now I guess I'll have to do it empirically using time of day.@Matt: what is a CA device? Link to comment Share on other sites More sharing options...
thecodeman Posted July 26, 2011 Share Posted July 26, 2011 @Matt: what is a CA device?Card Access, they make things such as contacts and relays that are zigbee and tie into the C4 ecosystem. They have options for external temp probes. Link to comment Share on other sites More sharing options...
ILoveC4 Posted July 26, 2011 Share Posted July 26, 2011 @Matt: what is a CA device?Card Access' date=' they make things such as contacts and relays that are zigbee and tie into the C4 ecosystem. They have options for external temp probes.[/quote']All most of the units have internal temp sensors. Link to comment Share on other sites More sharing options...
neeshu Posted July 27, 2011 Share Posted July 27, 2011 Anyone willing to share their programming logic? I have been playing around this a bit and am struggling some. I also want to include an announcement that tells me when the outside temp is cooler so that the A/C can turn off and we can manually open windows.Also, is anyone strugging with a CA temp probe not reading accurately? Ours does not appear to be linear across temperature ranges. For example, when the outside temp is 75F (using multiple online services), the CAdisplays 70F. At 85F outside temp, the CAreads the same. And when the outside temp is 95F, the CA reads 102-103F. We haven't tracked this during the winter months though. Ours is installed in a garage soffit overhang (so it never sees direct sunlight).Your help is appreciated. Link to comment Share on other sites More sharing options...
ekohn00 Posted July 27, 2011 Share Posted July 27, 2011 Anyone willing to share their programming logic? I have been playing around this a bit and am struggling some. I also want to include an announcement that tells me when the outside temp is cooler so that the A/C can turn off and we can manually open windows.Also, is anyone strugging with a CA temp probe not reading accurately? Ours does not appear to be linear across temperature ranges. For example, when the outside temp is 75F (using multiple online services), the CAdisplays 70F. At 85F outside temp, the CAreads the same. And when the outside temp is 95F, the CA reads 102-103F. We haven't tracked this during the winter months though. Ours is installed in a garage soffit overhang (so it never sees direct sunlight).Your help is appreciated.OK this is off the top of my head but I think it should work.You can go into Programming and select the CA driver.Select the option for Temperature - When temperature changes. Next go to programming and select the CA driver in Actions. Select Temperature and you can add an if xx temperature is yy in your situation, you can then select the thermostat and add a nested if the temp on xx is or if the cool set point it..... Link to comment Share on other sites More sharing options...
turls Posted September 21, 2011 Share Posted September 21, 2011 What about humidity? Is there a sensor that would add that as a element of the equation on when to run A/C, close windows/shades, run whole house fan, etc.?I know the new WeatherHawk stuff is slick but I should be able to do 90% of what I want to do at a fraction of the cost. Link to comment Share on other sites More sharing options...
thecodeman Posted September 21, 2011 Share Posted September 21, 2011 There aren't any humidity sensors that we can integrate with yet. Link to comment Share on other sites More sharing options...
Astephenson Posted September 22, 2011 Share Posted September 22, 2011 I will talk to my superiors about possibly getting a humidity control device created, there are already several that consist of a device that has variable resistance and I think a variation of our smart pressure sensor or external thermistor driver may just do the trick. One thing that would be good to know before they go forward with this would be how many people would actually be interested with a humidity sensor and would use one to base programming on? Aaron @ Card Access Link to comment Share on other sites More sharing options...
turls Posted September 22, 2011 Share Posted September 22, 2011 Thanks for the responses. I can tell you is if energy management with stuff like Eragy takes off, this would be an essential part of a system that somehow integrates fresh air as part of that management (tired of my house being hotter than it is outside, therefore I currently have high CFM whole house fan integrated with C4, and have all the pieces to open up casement window automatically when that turns on, although that isn't quite setup or integrated yet.) A set humidity level trigger may prevent that from happening. Link to comment Share on other sites More sharing options...
steve909 Posted September 22, 2011 Share Posted September 22, 2011 +1 for a humidity sensor Link to comment Share on other sites More sharing options...
arboleda Posted September 22, 2011 Share Posted September 22, 2011 turls, what whole house fan are you using? Does it tie into your forced air system or just suck air up into the attic? And how are you opening the casement window automatically (in terms of mechanics, not necessarily the programming)? Link to comment Share on other sites More sharing options...
turls Posted September 22, 2011 Share Posted September 22, 2011 I'm using a QuickCool model QC4500. It just sucks air into the attic. It has two fans and I have them on a C4 outlet switch so I can control them independently.I'm using a motor designed by Wintrol, but sold through Truth to open the casement window. Wintrol's web site is great:http://wintrol.com/motors.htmI've got them wired but not hooked up yet. I just ordered 2 sets to start, I want to automate at least one more window. Link to comment Share on other sites More sharing options...
turls Posted November 18, 2011 Share Posted November 18, 2011 So, Card Access (Aaron), any hope of this any time soon? Link to comment Share on other sites More sharing options...
bk Posted November 18, 2011 Share Posted November 18, 2011 Another 4 humidity sensor Link to comment Share on other sites More sharing options...
turls Posted August 2, 2012 Share Posted August 2, 2012 Dead, live? Bump Link to comment Share on other sites More sharing options...
AutoMater Posted August 10, 2012 Share Posted August 10, 2012 Axxess Industries has a motion sensor with temperature sensor and optional humidity sensorhttp://www.axxind.com/home/devices/motion-sensor.php Link to comment Share on other sites More sharing options...
turls Posted August 10, 2012 Share Posted August 10, 2012 Thanks for reminding me about Axxess. That Wintrol link is dead, not sure what is up. They didn't sell it anyway, but the website had good info.http://www.truth.com is the main distributor. Link to comment Share on other sites More sharing options...
turls Posted March 5, 2013 Share Posted March 5, 2013 Wintrol links live on web.archive.org--lots of good PDFs here for using the hardware you can still buy through Truth, only one was missing that I tried to pull and archive...For example, https://www.truth.com/main/pdfs/Sentry%20II%20brochure.pdfhttp://web.archive.org/web/20120102123442/http://wintrol.com/index.htmHere's the page with docs on Truth's website for completeness:https://www.truth.com/main/homeowner/technicalsupport2.cfm Link to comment Share on other sites More sharing options...
alanchow Posted March 6, 2013 Share Posted March 6, 2013 wow talk about digging up an old thread:)You know i have a few internet weather forecasting drivers that i should package and release. Link to comment Share on other sites More sharing options...
turls Posted March 7, 2013 Share Posted March 7, 2013 Yeah, but "losing" that Wintrol stuff was really a crime as it was really good stuff, so I wanted to update the status.By the way, if anybody bothers to try to automate windows and whole house fans like I did, you better make sure your family doesn't have allergy issues. I can't even run my stuff when it would make the most sense (hotter inside than outside during the summer), because it bothers my spouse so much. Link to comment Share on other sites More sharing options...
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