Venstar T1900 Installation - Manual (Page 6)

Page 2.1
SECTION 2
Remove & Replace the Old Thermostat
2
Remove the cover of the old thermostat.
If it does not come off easily check for screws.
Loosen the screws holding the thermostat
base or subbase to the wall, and lift away.
Disconnect the wires from the old thermostat.
Tape the ends of the wires as you disconnect
them, and mark them with the letter of the
terminal for easy reconnection to the new
thermostat.
Keep the old thermostat for reference purposes,
until your new thermostat is functioning properly.
AUTO
I2:00 Pm
HEAT COOL 72
74
AUTO
I2:00 Pm HEAT COOL 72
74
AUTO
I2:00 Pm HEAT COOL 72
74
AUTO
I2:00 Pm HEAT COOL 72
74