Venstar TSTATEZ - Manual (Page 5)

STEP #3 WIRE CONNECTIONS
If the terminal designations on your old
thermostat do not match those on the
new thermostat, refer to the chart below,
or the wiring diagrams that follow.
* C may not be used on all systems.
** O/B is used if your system is a Heat Pump.
Wire from the
old thermostat
terminal marked
Function
Install on the
new thermostat
connector marked
G or F Fan G
Y1, Y or C Cooling Y1
W1, W or H Heating W1,O,B
W1,O,B**
Power Rh, R, M, Vr, A R
C
O/B
C * Common
Rev. Valve
Y2 Y2
W2 W2
2nd Stage Cool
2nd Stage Heat
RS+5 RS+5 Remote Sensor +5vdc
RS RS Remote Sensor Signal
RS G GND Remote Sensor Ground
Page 4
74 i2:00 72 Pm
WAKE
HEAT