John,
If your unit crashes then everything stops working. With separate pieces of monitor/controller equipment only one piece would be affected i.e.; heater/chiller on MEDUSA lights on timers, PH monitor and so on. Any thoughts/
Well as I said above, I was one of the early adopters and have had one running continuously for years. My original one is now running various lights around the house for security purposes.
The only problem that I ever had was when the controller got accidentally unplugged.
For ââ"šÂ¬Ã…"œmissionââ"šÂ¬Ã‚ critical devices like heating and cooling, you should have backup overrides.
Here are some recommended precautions when using the X-10 based controllers:
1 Use heaters that have internal thermostats and set them a few degrees
higher than the set point for the AquaController. If the Aquacontroller fails to turn a heater off, the thermostat internal to the heater will turn it off before any danger point is reached.
2 Use chillers that have internal thermostats and set them a few degrees
lower than the set point for the AquaController. If the Aquacontroller fails to turn a chiller off, the thermostat internal to the chiller will turn it off before any danger point is reached.
3 Use blocking filters to keep electrical interference generated by electrically ââ"šÂ¬Ã…"œnoisyââ"šÂ¬Ã‚ devices from interfering with the X-10 communications. Certain devices such as metal halide ballasts, and some florescent ballasts are ââ"šÂ¬Ã…"œknown suspectsââ"šÂ¬Ã‚Â.
4 Blocking filters to isolate you entire system are also a good idea to keep you from having ââ"šÂ¬Ã…"œX-10ââ"šÂ¬Ã‚ wars with your neighbors. I had a neighbor that had an X-10 system for home automation. We were inadvertently turning on and off each otherââ"šÂ¬Ã¢"žÂ¢s devices. I identified who it was by going out on my patio at night and hitting the ââ"šÂ¬Ã…"œAll lights onââ"šÂ¬Ã‚ button on a X-10 controller that I had.
If isolating your entire house from the public power grid is your goal, Use Levitonââ"šÂ¬Ã¢"žÂ¢s ââ"šÂ¬Ã…"œMulti-Phase Blocking Couplerââ"šÂ¬Ã‚ Leviton part # 6284.
Individual ââ"šÂ¬Ã…"œdevices that are generating interference can usually be isolated with Levitonââ"šÂ¬Ã¢"žÂ¢s ââ"šÂ¬Ã…"œPlug-In Noise Filterââ"šÂ¬Ã‚ Leviton part # 6288.
Here is Levitonââ"šÂ¬Ã¢"žÂ¢s Home Automation URL:
http://www.leviton.com/sections/prodinfo/automate/s5c9p1.htm
At the bottom of this page is a really neat PDF catalog. (The Tech Manual)
Regards,
Scott