larryllix

Program "True" and "False' indicates the last state of the "If" conditional logic evaluation and is used for debugging purposes. If you pull down menu item at the top (can't remember which one) there is an option to turn on folder and program colours so this is more visible to watch program actions and status. This is not a problem but rather a feature. Devices have On, Off, analogue levels etc.

As per oberkc above. If 1.5 hr from sunset to sunrise next day. <---this will always trigger else and control motion sensor is on. then set outside fan on set outside lights on wait 5 min set outside fan off set outside lights off Else set outside fan on wait 5 min set outside fan off Time frames are a gotcha' in ISY. They need to be disabled to NOT trigger the else at the end of the filter condition. If control motion sensor is switched on. <----requires triggering enabled Then run (if) Program2 Else -- Program 2 (disabled) --------- If 1.5 hr from sunset to sunrise next day. <--requires triggering disabled=filter only then set outside fan on set outside lights on wait 5 min set outside fan off set outside lights off Else set outside fan on wait 5 min set outside fan off

That is what I set mine up to do but you have to add in the existing time passed to that point first. Most of the rest is just init to be able to survive a power failure.

Nice. My biggest problem was handling the midnight run over and cutting it off properly. If you don't handle the next day reset of the ISY seconds counter and the pump runs over midnight Example of midnight pump run time: You will get a (negative) -80,150 seconds reading if the pump started at 80,300 seconds and stopped at 150 seconds the next day.

LOL. I guess I misread the program with so many 'ump's. if you have a continuous run over midnight things will be off somewhat depending on how long the run lasts. 24x7 continuous run will register as zero seconds per day as only Offs count.. I also changed mine to minutes to look more of a mentally manageable time unit.

Yes I share the same type of experience with other products. You can't beat aartech.ca's prices in Canada either. Amazon and SH doesn't even come close after money differential and shipping. Order today and receive it tomorrow usually. Well, maybe not if you didn't vote for Dustbin.

From friends that have A/C in the attic they love it and claim they would never change that. Mind you if you put the compressor up there it will be a head shaker too. so just the evaporator coils. They claim the cool air drops down on the rooms from ceiling vents and has a better distribution. makes sense for economy of air pumping but the heat in an attic may be a detriment for keeping the air cold during transit. Turbulence is not your friend! I have a pipe run to my MBR that howls after a certain fan speed. I changed the run from 4" to 5" and changed the furnace boot size up too but it didn't work. Unfortunately, the only way to supply this run was right out of the plenum. grrrr... Right now I have a short piece of flex to accommodate an offset in the run which hasn't done jack skeet for the problem. Some day I am making a double walled pipe muffler that is supposed to work fairly well for stopping noise transmission. Some day I will be deaf anyway.

So you are not using the program you posted then?

There was typically a shutter on the fan output to close down the volume. The installer had to do calculations and close down the damper to suit the CFM required. On squirrel cage fans the less air you move the less power is drawn and the fan speed increases slightly due to less load. If the adjusted damper restriction was removed you could overheat your fan motor with volume overload.

Thanks LeeG!

My ECM fan has multiple logic inputs to control speeds. When the heating mode is selected it starts on a very slow speed and then ramps up to medium speed after about 45 seconds. Then (if selected) ramps up to a high speed about 5 minutes later. This is using two 24vac logic inputs. One of them is phase sensitive to get more logical inputs. originally I had the input from another 24 vac supply that was fed off the other phase of my panel and the fan would not ramp up properly. A call to their tech support identified I was feeding it the wrong phasing and a feature that wasn't fully supported on the ECM motor was being enabled. I moved the breaker over to the other phase of my panel and it functioned properly ramping through the speeds again. That just amazed me that a motor 24vac input could be phase sensitive. All selected in the ECM programming. The same fan motor also has two A/C 24vac logical inputs that control three different speed selections. Then there is a humidity lowering input (jumper to live) that just slows all speeds down a bit. easily takes a humidistat dry contact. Work with A/C only. IIRC there is two fan on logical inputs that do not use a logic table and only provide two discreet speeds. On top of all these speeds the ECM motor continuously varies speeds to compensate for filter clogging and other air restrictions. Timing and speed logic is all programmed by the furnace supplier using this generic GE ECM fan motor. When it goes defective I have to go back to the furnace manufacturer to get the same secret programming setup.

Since you were into this and I have been meaning to create one for my HRV I set these up. They have been tested somewhat but not thoroughly yet. Four Integer variables need to be defined for start, stop, runtime, and scratchpad Here is the start and stop with accumulation timer = runtime HRV.tracking - [ID 0094][Parent 00BD] If 'Cold Cellar / CCel Ventilation Fan' Status is Off Then $HRV_Fan.offTime = [Seconds since start of day] $HRV_Fan.offTime Init To $HRV_Fan.offTime $HRV_Fan.scratchpad = $HRV_Fan.offTime $HRV_Fan.scratchpad -= $HRV_Fan.onTime $HRV_Fan.runtime += $HRV_Fan.scratchpad $HRV_Fan.runtime Init To $HRV_Fan.runtime Else $HRV_Fan.onTime = [Seconds since start of day] $HRV_Fan.onTime Init To $HRV_Fan.onTime The reporting take two programs as I don't want the condition of the fan running over midnight to trigger that program. Note there is code included to account for a running fan over midnight while the report is being generated. This should keep the times exact except for the time short of midnight when ISY is probably very busy. Also, power failures should be handled to stay accurate by initialising key variables. HRV.tracking.report - [ID 0095][Parent 00BD] If Time is 11:59:50PM Then Run Program 'HRV.tracking.report.2' (If) Else - No Actions - (To add one, press 'Action') HRV.tracking.report.2 - [ID 009A][Parent 00BD][Not Enabled] If 'Cold Cellar / CCel Ventilation Fan' Status is Off Then $HRV_Fan.scratchpad = [Seconds since start of day] $HRV_Fan.scratchpad -= $HRV_Fan.onTime $HRV_Fan.runtime += $HRV_Fan.scratchpad Run Program 'HRV.tracking.report.2' (Else Path) Else Send Notification to 'Text Larry' content 'HRV RunTime Report' Wait 8 seconds $HRV_Fan.onTime Init To 0 $HRV_Fan.onTime = 0 $HRV_Fan.runtime Init To 0 $HRV_Fan.runtime = 0 Add in last time to midnight (if any) Send report Set On time = 0. .If running, use midnight=0, else use next On time. Reset accumuated runtime Finally here is a screenshot of my notification message. .

V5.0.2 has some cosmetic problems but is mostly functional for all of my stuff.

Just for my own brain as I hardly ever use 'status' and very few folder conditions. I find them very "hidden". Control ---------- The folder(s) will not be enabled as the control signal(s) 'On' or 'Off' have never been received soon after the power up stage. ISY doesn't know yet. Status --------- How does the 'status' condition for the folder logic get resolved if the controls signal(s) 'On' or 'Off' have never been received soon after a power up? ISY doesn't know yet. A query? What initiates the query?

With the multispeed ECM motor there is usually an extra speed connection to use for HA without getting into complex "is it already running" logic. Usually the highest speed selected rules and the lower speeds do not matter as you are only selecting logic inputs. The PSC motors may not like this idea though as two windings being energised can produce some unexpected results. My past home had a multispeed PSC motor with a few relays that switched to the fastest speed called. When I spec'ed my current furnace, about 7 years ago, the ECM motors were just coming on the scene and hard to find.

Here is a description of the three types used and some history. http://www.achrnews.com/articles/112674-comparing-motor-technologies

You need to be running IIRC v4.2.18 and up. V5++ has it for sure.

Well said. This is a hard concept, at first. I like to think of 'control' detecting the edge of the change or active signal and each device has two (or more) signals. 'On' and 'quiet'. The other signal is 'Off' and 'quiet'. ISY has combined and remembers the results into one status page with just 'On' and 'Off' showing.

It should be fairly easy with V5++ so far. When the fan turns on you save the current seconds since the start of the day in a variable. When the fan turns off you use the current seconds since the start of the day and subtract the variable = difference. Run another program if the difference is over the amount of seconds in 24 hours subtract that many seconds. Add the resultant difference to the accumulated seconds in the total fan run time. Another program sends the variable to you by email each month before midnight and resets the variable to zero. Divide by 60 for minutes, and 60 for hours before sending as desired.

I wonder if some of that is from the burner electronics or mostly all fan motor? Trouble is furnaces don't usually plug in and a clampon wattmeter is required to measure properly. Fan motors vary their power factor a lot depending on air movement. When lots of air is being moved the power consumption (Watts) is high, and when the filter is clogged or vents are closed the power consumption (Watts) is low but the current (amperes) do not change much. The power factor just drops as the motor is mostly an inductive load not doing much work. ECM motors are a whole different beast though. I would be surprised that any furnace would only offer 1 speed on the motor. If nothing else, usually the second speed offers isolation for the A/C fan control so an extra isolation relay isn't needed.

Yeah. I thought I was smart and went after an ECM motor for just that reason but I got screwed on some of the less obvious features, like an odd filter that costs a fortune and only from the furnace company or custom made. I found more common size that fits with an inch hanging out and ignore the leakage. The other item is howl at high speed but that was an installation flaw from the local "professionals" in a small town. The A/C suffers with the lower fan speeds.

As long as the motion cuts across the face of the MS horizontally (left <--> right with normal mounting) you should be fine. The Insteon MS units are quite sensitive but also have a jumper to desensitise them if desired. Mine picked up my bird at about 25-30 feet in a cage, once.

Ouch. 400 Watts. Yeah you don't want to be running those babies continuously. I was involved in electrical utility high bill complaints and 15-20 years back running a furnace fan continuously added about 40-50 dollars to your monthly bill. I would hate to think what is would cost these days with the energy ransom going on. Simple calcs would show. 400 Watts x 24 x 30 x $0.25/kWh (guess) = $72 per month. YMMV. We found the old fan motors didn't really cut back much energy consumption on lower speeds either. One of the problems I have suspected with low speeds also is, in some systems a few registers will not even get any air to come out. The piping system is a very tricky thing. Once air gets moving through one vent it can hog most all the air because the others have turbulence etc. Worse, once some get warmed up the chimney effect can draw most of the air hogging the major share of it again, even after the furnace fan shuts down. The old gravity fed furnace effect and problem. In short I believe you want at least a medium to high speed on a cyclic basis. Continuous low speeds on an AC induction fan motor are probably not the best solution. The occasional 'shots" of higher speeds are probably best. Your insulation project will help all this big time with less draughts and less energy consumption. Fan circulation will be needed less and easy to adjust with ISY. Nice week coming for last minute outside work!

Who wouldn't want the maximum air from thr top of a mountain though ? I was trying to keep my humidity over 50% but I was going through 4-5 gallons of water from a portable humidifier per day. I carted water way too often. After a few years of I decided just under 40% was fine but slightly dry on the throat times. The water consumption to maintain that was brutal and now much more reasonable. My HRV needs to be backed down somewhat in the winter as it is a big burden for the humidity changing with dry winter air. This my next project to automate the air exchange on a smarter basis.

The same problem occurs during A/C season when the house hits it's temp mark and it is cool outside in the middle of the night. No circulation occurs. During A/C season I set my stat Wake period to 3 AM with a temp drop of 0.5 degrees just to prompt an air circulation and avoid that stuffiness that happens when your bedroom fills up with carbon dioxide from exhaling.