Recent content by a0128958

The 20A00 (OP2) comes in two 'flavors:' no flash update (discontinued) and flash update.  Either 'flavor' comes in a -2 model (in enclosure), -8 (on structured plate), and -21 (board only).  The 'no flash update 'flavor' comes addition in a -5 model (in commercial enclosure).   The latest PC...

Thank you!  Best regards,  Bill

I use Network Thermostat ( http://www.networkthermostat.com ) thermostats for my residence and business customers.  Ethernet or Wi-Fi connectivity.  Weather data comes to each tstat from the Internet.  All settings are programmable and customizable.   I have my (four) Network Thermostat tstats...

You'll need to invest into having a Homeseer unit to accomplish having OP integration with Amazon Dot (Alexa).  Not a trivial subject.   Best regards,   Bill

I purchased PC Access in 1992.  Came in format of 3.5" floppy.  Registration code on the floppy.   I upgraded to latest version in 2013.  Called HAI, they asked me to send to them an image of my registration code (which I did).  They then sent to me an email containing a download link, along...

  I use standard UL listed 4-wire smoke detectors, UL listed 2-wire heat detectors, EOL resistors, and EOL relays as sourced from a reputable alarm company (i.e. System Sensor).  I don't think it matters what company you use here as long as the sensors and accessories are all UL Listed.  Go for...

I'm a new OP2 user.  Until now, I had to use solely PC Access to 'talk' to my former HAI controller.  I looked at SnapLink, saw it hadn't been produced for quite a number of years, and thus decided not to spend $20 or $30 for it.  And I noted the bad reviews.   Based on reading this topic, I...

  I don't think this is correct.  These sensors convert a temperature to a frequency.  I.e., the HAI temp sensors are variable frequency generators, with frequency a function of temperature.   Interestingly, the design hasn't changed for a standard temp sensor.  The HAI units (and PESMs) I used...

Such nice responses.  Thank you.  This looks to be an exceptional place to learn from, and, to be helpful as I can be.  My expertise will be with the antiquated HAI product (1503 V2), HomeVision, Web Energy Logger (WEL), geothermal HVAC (in operation), solar PV (in operation) and LED lighting...

Thank you all.   My HV implementation w/ my HAI 1503 V2 was extensive.  I used an HAI expansion panel hardwired to a HV expansion panel to communicate between the two.  I coded things with binary logic to fit within the limited 16 ports between the two panels.  I had another HAI expansion panel...

This month I replaced a 2nd generation HAI 1503 V2 unit with a 6th generation HAI OmniPro II unit.  I have an OP2 early version - 3 not 5 serial ports, and physical chip change-out for firmware update.  I'm at firmware version 3.16 so that's it - no more updates possible just like how I existed...

I haven't found a source, or dealer, yet. Installation should be straight forward as my Enerstat 3+2 panel appears to be wire-for-wire compatible with the EWC panel (not including new features that the EWC panel offers). I'm already familiar with and use low limit, high limit, clock, fire...

This is a very helpful posting. I've been looking for a replacement for my 14 year old Enerstat 3+2 Zone Control panel, one that would support two-stage thermostats (I use AprilAire's 8870s) and still include smoke and temperature sensing like my Enerstat panel does. I plan to look around to...

I don't believe it's correct that the AprilAire 8870 communicating thermostats require the mentioned 8811 and 8818 products. The 8870 thermostat, as an HVAC controller, functions as any standard thermostat does. I.e., you can just hook it up to your HVAC equipment as you would any thermostat...