Question about Heating & Cooling
I have looked at the manuals for both models but I would like to know exactly what wire from the new unit connects to which wires of the old.
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Posted on Jan 02, 2017
SOURCE: wiring on thermostat tl7235a1003
OK, here's my guess at this...I hope someone more knowledgable will confirm or correct me.
A line voltage thermostat switches the power to the baseboard heater. In other words, it's just like a wall light switch except it activates and deactivates based on the temperature.
I think your old model CT62 was wired exactly like a light switch. The hot wire to the light is broken then run to the wall switch and then back to the light so there's no neutral wire at a light switch box. This worked fine for your CT62 because it did not need power, it only needed to switch it.
The new model TL7235A1003 requires electrical power because it's programmable so you need both a hot wire and neutral wire at it's installed location. In addition you also need 2 wires leading to the baseboard heater so the thermostat can supply it's power.
I believe L1-L2 are to be connected to the hot/neutral wires, and the Load wires go to the baseboard heater.
If I am correct you will not be able to use this thermostat without some re-wiring.
Posted on Nov 27, 2007
Hopefully there are markings on the old t-stat as to what terminal is what.
on the honeywell 8000 use the heat pump labeling and then the standard wiring would be
There should not be a bare wire, it probably just has the insulation stripped back way too far.
You should probably open the furnace and compare the terminal label in the furnace to the wire color. normally yellow and blue pass through the furnace and are wire nutted to wires going to the outdoor unit. In the furnace the white wire will connect to the w or w1 terminal. also, you will need to set the Honeywell stat to have the following parameters.
other parameters that I did not specify, you may read the manual and make your own decision but I recommend factory settings for the other parameters
Posted on Jun 18, 2008
SOURCE: I just bought a Honeywell
I just installed a Honeywell 5.2 Day RTH2310B Programmable thermostat and I had to deal with the same situation: 2 wires, one white one black. After reading the edvice in one of the blog, the solution that worked for me was: BLACK ON Rc terminal and WHITE on W terminal. My furnace is running fine now. Hope it helps.
Posted on Dec 11, 2010
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