Originally posted by TomTom
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Originally posted by rprade View PostI use an open ended loop. Star topology is particularly problematic with OneWire devices. From my server I go to the first device, hop to the second, etc. I do tap into the loop "trunk" with 2-3 foot branches.
I measure:[list][*]High and low pressure line temperatures for 4 zones of mini-split air conditioners[*]Ambient and exhaust air temperatures for the two outside compressor/condenser units[*]Outlet and return air temperature for the four mini-split indoor units[*]supply and return temperatures for 8 zones of hydronic heating and the DHW zone
1) we bought sealed 1 wire sensors from china that have the 2-3 foot whip on them. Reading your comments it seems you haven't had any issue with reflections or such while leaving this excess wire on that's creates a small branch. Is this accurate and if not what issues have u seen and felt with?
2) your measuring the A/C high and low side temps. What value does this provide you when using events?
I ask cause I've been trying to source a analog/digital converter so I can interface either 2 or 3 wire pressure sensors. Measuring high and low side pressures, and condenser/evaporator line outlet temps, one can then compute superheat and subcool, which is the best approach on measuring a systems efficiency. I have a building science consulting company whom is providing many other equations on measuring a homes performance.
Sent from my HTC One max using TapatalkLast edited by CharlieWayne; July 30, 2015, 01:29 AM.HSPro: 3.0.0.194
PL: Insteon PLM 3.0.5.20,Insteon Thermostat 3.0.1.1 , UltraM1G, RainRelay8, UltraECM3, UltraPioneerAVR3, BLBackup, weatherXML, Jon00 Network & PC Monitor
HW : Win 7 64bit, Intel i7-2600, 16 GB DDR3 Ram, 60 Plus Insteon Dual Band Devices, Rain8 Pro2, Elk M1 Gold, Brueltech GreenEye.
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[QUOTE=CharlieWayne;1192305]Originally posted by rprade View PostI use an open ended loop. Star topology is particularly problematic with OneWire devices. From my server I go to the first device, hop to the second, etc. I do tap into the loop "trunk" with 2-3 foot branches.
I measure:[list][*]High and low pressure line temperatures for 4 zones of mini-split air conditioners[*]Ambient and exhaust air temperatures for the two outside compressor/condenser units[*]Outlet and return air temperature for the four mini-split indoor units[*]supply and return temperatures for 8 zones of hydronic heating and the DHW zone
/QUOTE]
Great insight Randy. 2 questions for u as we're about to wire in several 1 wire for attic and HVAC monitoring.
1) we bought sealed 1 wire sensors from china that have the 2-3 foot whip on them. Reading your comments it seems you haven't had any issue with reflections or such while leaving this excess wire on that's creates a small branch. Is this accurate and if not what issues have u seen and felt with?
2) your measuring the A/C high and low side temps. What value does this provide you when using events?
I ask cause I've been trying to source a analog/digital converter so I can interface either 2 or 3 wire pressure sensors. While high and low side pressures, and condenser/evaporator line outlet temps, one can then compute superheat and subcool, which is the best approach on measuring a systems efficiency. I have a building science consulting company whom is providing many other equations on measuring a homes performance.
Sent from my HTC One max using Tapatalk
Mini-splits work differently than conventional air conditioning systems, because the expansion valve is in the outdoor unit. That notwithstanding, knowing the normal temperature range of the two lines, coupled with the temperature drop at the air handler and the current consumption of the units let me know that the large single zone unit was outside of normal parameters, alerting me that it was low on Freon. Turned out that the three way valve on the outdoor unit was leaking. I recovered the Freon, replaced the valve, evacuated and recharged the system. Without the sensors we would have known that something was wrong, because it wasn't cooling as well, but the combination of temperatures and current consumption pointed me in the correct direction.
The only events we have with regard to air conditioning are to let us know if the temperature drop (return air vs outlet air) is insufficient for the room temperature after the unit has been running for five minutes.
If I can figure out all of the IR codes to control the units, I might be able to automate more. So far I have had little luck.HS4 Pro, 4.2.19.0 Windows 10 pro, Supermicro LP Xeon
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Thank you Randy!!
Your explanation and the kidde documentation have helped me understand the setup. Now its on my Very Important To-Do List ...Tom
baby steps...starting again with HS3
HS3Pro: Z-NET & 80 Z wave Devices,
HSTouch: 4 Joggler (Android Kitkat), 2 iPhone, 3 iPads
Whole House Audio: 5 SqueezePlay Jogglers w Bose Speakers
In The Works: 10 Cameras Geovision, new Adecmo/Envisalink Alarm, Arduinos
System: XP on Fanless Mini-ITX w/ SSD
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Originally posted by TomTom View PostThank you Randy!!
Your explanation and the kidde documentation have helped me understand the setup. Now its on my Very Important To-Do List ...
Charlie
Sent from my HTC One max using TapatalkHSPro: 3.0.0.194
PL: Insteon PLM 3.0.5.20,Insteon Thermostat 3.0.1.1 , UltraM1G, RainRelay8, UltraECM3, UltraPioneerAVR3, BLBackup, weatherXML, Jon00 Network & PC Monitor
HW : Win 7 64bit, Intel i7-2600, 16 GB DDR3 Ram, 60 Plus Insteon Dual Band Devices, Rain8 Pro2, Elk M1 Gold, Brueltech GreenEye.
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Right now my plan is to put heat detectors in garage, attic and shed - hooked up to alarm
panel. I had read that smokes aren't reliable in dusty locations so I never put any in garage, shed., and attic due to high heat. Suppression system
would be great, but something like sprinklers would be disaster if you had a false alarm( soggy insulation n ceiling). Don't have knowledge of other suppression a systems.
Sent from my iPhoneTom
baby steps...starting again with HS3
HS3Pro: Z-NET & 80 Z wave Devices,
HSTouch: 4 Joggler (Android Kitkat), 2 iPhone, 3 iPads
Whole House Audio: 5 SqueezePlay Jogglers w Bose Speakers
In The Works: 10 Cameras Geovision, new Adecmo/Envisalink Alarm, Arduinos
System: XP on Fanless Mini-ITX w/ SSD
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I've worked with Kidde systems alot. There on all the trucks and mobile equipment now a days. They use DryChem (Dry Chemical) as a extinguishant.
But the cost for these are expensive as there only found on assets greater than 1 million dollars.HSPro: 3.0.0.194
PL: Insteon PLM 3.0.5.20,Insteon Thermostat 3.0.1.1 , UltraM1G, RainRelay8, UltraECM3, UltraPioneerAVR3, BLBackup, weatherXML, Jon00 Network & PC Monitor
HW : Win 7 64bit, Intel i7-2600, 16 GB DDR3 Ram, 60 Plus Insteon Dual Band Devices, Rain8 Pro2, Elk M1 Gold, Brueltech GreenEye.
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Thanks, what kind of trucks and mobile equipment?
Sent from my iPhoneTom
baby steps...starting again with HS3
HS3Pro: Z-NET & 80 Z wave Devices,
HSTouch: 4 Joggler (Android Kitkat), 2 iPhone, 3 iPads
Whole House Audio: 5 SqueezePlay Jogglers w Bose Speakers
In The Works: 10 Cameras Geovision, new Adecmo/Envisalink Alarm, Arduinos
System: XP on Fanless Mini-ITX w/ SSD
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Well, I wasn't absolute on the statement of only found on assets over 1 million. Really I don't know why or what threshold they choose when to or not to install.
I've installed tons of Kidde systems in armored hummvees, army MRAPs, and service the systems on all the large mining equipment we work on. Never seen it on construction equipment or on hwy trucks.
At the current faculty where I work, my company uses a 3 rd party for installs and I might have business cards for Kidde FSR's that I've meet at manufacturing plants. If u need assistance let me know and I'll try to help. I've never thought of incorporating their sensors into HA use.
Sent from my HTC One max using TapatalkHSPro: 3.0.0.194
PL: Insteon PLM 3.0.5.20,Insteon Thermostat 3.0.1.1 , UltraM1G, RainRelay8, UltraECM3, UltraPioneerAVR3, BLBackup, weatherXML, Jon00 Network & PC Monitor
HW : Win 7 64bit, Intel i7-2600, 16 GB DDR3 Ram, 60 Plus Insteon Dual Band Devices, Rain8 Pro2, Elk M1 Gold, Brueltech GreenEye.
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