Im looking to install a newprogrammable thermostat thats a Honeywell TB7220U-commercial(because of it no support as a consumer!)
I as looking at the wiring diagrams online and anted to know how to hook up several wires and if i ill need to add another wire...I have a 2 stage heat pump with heat kit.
-fairly new.but old thermostat doesnt have all the extra features new Heat pump offers.
I currently have 7 wires from unit to tstat..Dk brown-common ,red-24v,orange rev valve,green fan ,yellow compressor,white aux,and blue Eheat(last 2 tied together at unit).
the unit has2stageheat/cool -multistage and on last page mine is the chart on right.
The new thermostat has connection screws /my diagram shows i will use O,G,C,R/RCjumpered,,W1,Y,Y2,..old one didnt have y2 new one does
How will i need to wire this exactly? and will i have to run a new wire for y2 or is high cool and low cool not a must ?
Also says Common is optional- in notes- if using batteries-so can i use that wire for y2?
i will not need a,s1 nor s2 on the chart for my new thermostat.i dont use w2 either.
Last diagram is unit and brown wire not used W2
I as looking at the wiring diagrams online and anted to know how to hook up several wires and if i ill need to add another wire...I have a 2 stage heat pump with heat kit.
-fairly new.but old thermostat doesnt have all the extra features new Heat pump offers.
I currently have 7 wires from unit to tstat..Dk brown-common ,red-24v,orange rev valve,green fan ,yellow compressor,white aux,and blue Eheat(last 2 tied together at unit).
the unit has2stageheat/cool -multistage and on last page mine is the chart on right.
The new thermostat has connection screws /my diagram shows i will use O,G,C,R/RCjumpered,,W1,Y,Y2,..old one didnt have y2 new one does
How will i need to wire this exactly? and will i have to run a new wire for y2 or is high cool and low cool not a must ?
Also says Common is optional- in notes- if using batteries-so can i use that wire for y2?
i will not need a,s1 nor s2 on the chart for my new thermostat.i dont use w2 either.
Last diagram is unit and brown wire not used W2
Last edited:
