My landlord recently purchased me a Lux TX500 programmable thermostat (I told him I would install it if he purchased it). I disassembled the old/original Honeywell T87F unit and discovered six wires: G, Y, W, R, O (brown wire), and B (blue wire). Since
The B wire must be connected to the C (Common) wire.
Make sure you make a bridge between RH and RC in the thermostat.
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My old thermostat didn’t use my aux heat correctly, or at even at all, so we got in a VERY bad habit of running off emergency heat. When we got our highest power bill ever… wow, I had to do something.
So I started looking for a thermostat that would make use of our auxiliary heat and thought that I may as well go programmable at the same time to help break us of some bad habits.
I have a friend who has Hunter 44760 who absolutely loves it. I just couldn’t find it available anywhere other than ebay, and I wanted to install something fast. I knew Lux has a great reputation, and just got a fresh Amazon Prime membership, so I went with this thermostat and got it shipped overnight.
The Thermostat takes 2 AA batteries. They highly suggest Duracell or Energizer, in fact the package says to ONLY use these brands. I believe they just do not want people installing cheap batteries that will cause a hassle to replace quicker, or people losing their programs.
There is an indicator that will tell you when the batteries go dead, and once you remove the batteries you have 1 minutes to place the new ones in before you lose your program. 1 minute seems like plenty of time to place the batteries in there, just have them ready when you take the old ones out.
The instructions come with a chart with other thermostat manufacture’s wiring info, and some stickers to label your wires as you remove them from the old thermostat. I was pretty luck because my old thermostat was labeled the same as the new Lux.
The rest is as easy as replacing the old thermostat on the wall with the new one and attaching the wires. It took me about 15 minutes to install.
Programming is very easy. It has a dial you can switch between Weekdays, Saturday and Sunday. You set your time for the morning by pressing an up/down button, hit next to change the temperature, and then next again to do the same for day, evening and night. When you are done, turn the dial to run and you are done. Very simple.
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