Venstar T2900 Installation - Manual (Page 12)

Page 4.1
SECTION 4
Wire Connections
4
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
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
Power Rh, R, M, Vr, A R
C
O/B
C Common
Rev. Valve
W2 2nd Stage Heat
RS+5 Remote Sensor +5vdc
Remote Sensor Signal
CKGND Dry Contact Switch 2
RS+5
RS1 RS1
RSGND Remote Sensor Ground RSGND
CK1 Dry Contact Switch 1 CK1
CKGND
W2
MISC1
MISC2
MISC3
MISC1
MISC2
MISC3
RS2 RS2 Remote Sensor Signal #2
Configurable Output #1
Configurable Output #2
Configurable Output #3
* O/B is used if your system is a Heat Pump.
** For instructions on connecting these terminals see page 15.2
of the Owner’s Manual.
RS+5**
RS1**
RSGND**
W1/O/B*
RS2**
AUTO
I2:00 Pm
HEAT COOL 72
74