Venstar T2000 - Wire Connections Guide

Installation Instructions
2
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.
Wire from the Install on the
old thermostat Function new thermostat
terminal marked connector marked
G or F Fan G
Y1, Y Cooling Y1
W1, W Heating W1/O/B
Rh, R, M, Vr, A Power R
C Common C
O/B Rev. Valve W1/O/B*
W2 2nd Stage Heat W2
Ck1 Dry Contact Switch CK
CKGND Dry Contact Switch R
* O/B is used if your system is a Heat Pump.