Ask Experts Questions for FREE Help !
Ask
    chuckpollardiii's Avatar
    chuckpollardiii Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Nov 12, 2012, 10:04 PM
    Replacing ITT T80BV100J with Honeywell CT50K
    I am replacing my old ITT T80BV100J (for use with millivolt, 24 VDC @ 0.60 amp) controlling my existing gas fired gravity floor furnace with a new Honeywell CT50K standard t-stat. Connecting to the new Honeywell seems straightforward with terminals R for power and W for heating. The old ITT t-stat though has no markings on the connectors one on left and the other on the right. Can anyone help me with which one is which on the old t-stat?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Nov 13, 2012, 05:24 AM
    I am replacing my old ITT T80BV100J (for use with millivolt, 24 VDC @ 0.60 amp) controlling my existing gas fired gravity floor furnace with a new Honeywell CT50K standard t-stat. Connecting to the new Honeywell seems straightforward with terminals R for power and W for heating. The old ITT t-stat though has no markings on the connectors one on left and the other on the right. Can anyone help me with which one is which on the old t-stat?

    First is the new thermostat compatible with a millivolt system? Many are not and it should state weather or not the new thermostat is on the directions or box it came in.

    Two wires are two wires not much of a mystery. Pick any one of the two and land it on any thermostat terminal and do the same with the other wire BUT check to be sure the thermostat is compatible as mentioned before you do anything.
Not your question? Ask your question View similar questions
 

Add your answer here.


Check out some similar questions!

I'm replacing a 23 year old manual Honeywell thermostat with a new digital Honeywell [ 1 Answers ]

I'm replacing a 23 year old manual Honeywell thermostat with a new digital Honeywell thermostat model RTH111. The old thermostat has two wires (colors white and red) but no designation on the terminals. This is for a hot water baseboard gas fired boiler. Which terminals do these unmarked wires...

Replacing Honeywell LR69071 thermostat with Honeywell TH8320U1008 [ 4 Answers ]

I thought the transfer of wiring would be intuitive, but I was clearly mistaken. I have a heat pump with an aux electric furnace. Current connections are (by color) X - blue W2 - white R - red G- green O - orange Y - yellow E - brown Can anyone tell me where these should connect on the...

Replacing GE Honeywell Weathertron and Replacing with Hunter Model 44860 [ 1 Answers ]

I need help... I am having furnace problems and I'm hoping changing the thermostat may help. But the Hunter wire diagram letters do not match that on the Honeywell. The letters on the Honeywell are R, T, O, G, Y, X2, B AND W. The wires on the Hunter are RC/R.C.Y1, Y2,W2,L,E,O,B,G.

Replacing a Honeywell T8575D2003 with a Honeywell RTH8500. Having trouble with wires [ 1 Answers ]

I'm replacing a Honeywell T8575D2003 with a Honeywell RTH8500. Didn't think there would be issues, manuals are all straight forward. However when I removed the T8575, the wiring set up did not match what the RTH8500 was expecting. The T8575 has 8 wires connected as follows < 1 ...

Replacing Honeywell T8411R with Honeywell RTH7500 - wiring problems [ 1 Answers ]

I need help getting my new, programmable thermostat to work. I currently have a dual-stage Heat Pump and A/C unit that works fine. The current thermostat is the Honeywell T8411R. I don't know the number for the subbase, but it's the one that came with the thermostat. The current (operational)...

View more questions Search