Wire Connections - Johnson Controls T8690 Owner's Manual And Installation Instructions

Installation Instructions

Wire Connections

If the terminal designations on your old thermostat do not match those
on the new thermostat,
diagrams that follow.
Wire from the
old thermostat
terminal marked
G or F
Y1, Y or C
W1, W or H
Rh, R, M, Vr, A
C
O/B
W2
Y2
W3
HUM
DEHUM
S1/OUT -
S2/OUT +
* O/B is used if your system is a Heat Pump.
refer to the chart below or the wiring
Function
Fan
Cooling
Heating
Power
Common
Rev. Valve
2nd Stage Heat
2nd Stage Cooling
3rd Stage Heat
Humidification
Dehumidification
Temp Sensor
Temp Sensor
49
Install on the
new thermostat
connector marked
G
Y1
W1/0/B
R
C
W1/O/B*
W2
Y2
W3/AUX
W3/AUX
W3/AUX
SENSOR
SENSOR