Today I replaced the programmable thermostat on our electric furnace with a new model that can be remotely controlled. I thought i would post some pictures and give some impressions of what I got in case anyone would be interested.
I ordered the thermostat from the Home Depot website and it shipped out in a week. The box that came was marked YTH8320ZW1007. This contained the thermostat and the THP9045 "4 wire to 5 wire converter" which I was not expecting (no mention of it being included on the website description) I did not use the converter but it is nice to have should I ever need it in the future. (the converter is used at the furnace side the thermostat supports it natively)
The furnace I'm using this with is an old Lennox electric furnace probably dating from when the house was built in 1973. I am sure when it was installed there were only 2 wires coming from it (the R and W wires) to the original thermostat which was one of those round Honeywell bimetallic strip mercury thermostats. (paint marks on the wall definitely show it was one of those) But at some point probably back before 2006 (when the basement was remodeled) they ran a new thermostat wire that contained 4 wires, the Red Blue White Yellow wires and then they did a little rewiring at the furnace to extend the common (C) wire. For some reason they connected this to the Yellow wire instead of the Blue wire. So I had the Red Yellow White wires live at the thermostat with the C terminal being on Yellow.
I turned off the breaker and took the furnace panels off to figure out the wiring since I did not trust the wire connections at the existing thermostat.
After reading the installation manual and figuring out what was going to what I connected and mounted the thermostat and turned back on the furnace to make sure the thermostat would power up from the transformer in the furnace, then I pulled the packing tab out from the battery in the thermostat and we are off and running.
Another thing I liked about this thermostat was it was tall enough to completely cover the junction box on the wall that the original thermostat used.
The thermostat uses a coin Lithium battery to save the programming and clock and temperature settings. It does not draw power from this unless the AC power fails.
I'm going to be rigging up the Zwave tomorrow and I'll follow this post up with the results of that.
I ordered the thermostat from the Home Depot website and it shipped out in a week. The box that came was marked YTH8320ZW1007. This contained the thermostat and the THP9045 "4 wire to 5 wire converter" which I was not expecting (no mention of it being included on the website description) I did not use the converter but it is nice to have should I ever need it in the future. (the converter is used at the furnace side the thermostat supports it natively)
The furnace I'm using this with is an old Lennox electric furnace probably dating from when the house was built in 1973. I am sure when it was installed there were only 2 wires coming from it (the R and W wires) to the original thermostat which was one of those round Honeywell bimetallic strip mercury thermostats. (paint marks on the wall definitely show it was one of those) But at some point probably back before 2006 (when the basement was remodeled) they ran a new thermostat wire that contained 4 wires, the Red Blue White Yellow wires and then they did a little rewiring at the furnace to extend the common (C) wire. For some reason they connected this to the Yellow wire instead of the Blue wire. So I had the Red Yellow White wires live at the thermostat with the C terminal being on Yellow.
I turned off the breaker and took the furnace panels off to figure out the wiring since I did not trust the wire connections at the existing thermostat.
After reading the installation manual and figuring out what was going to what I connected and mounted the thermostat and turned back on the furnace to make sure the thermostat would power up from the transformer in the furnace, then I pulled the packing tab out from the battery in the thermostat and we are off and running.
Another thing I liked about this thermostat was it was tall enough to completely cover the junction box on the wall that the original thermostat used.
The thermostat uses a coin Lithium battery to save the programming and clock and temperature settings. It does not draw power from this unless the AC power fails.
I'm going to be rigging up the Zwave tomorrow and I'll follow this post up with the results of that.