Radio Thermostat CT110 Install Manual page 16

Multi-stage Heat and Multi-stage Cool
The CT110 can handle up to 2 stages of HEAT and 2 stages of COOL.
STEP 1 - Connect the W, W2 wires to the W terminal.
This connects the stages of HEAT.
STEP 2 - Connect the Y and Y2 wires to the Y terminal.
This connects the stages of COOL.
STEP 3 - Connect the RH or R wire to the RH terminal.
This connects the power.
STEP 4 - Connect the G wire to the G terminal.
This connects the fan.
STEP 5 - Optional - Connect the C wire to the C terminal.
Your HVAC system is now connected to the CT110.
Please Go To Page 6
4 Wire Heat Pump (heat/cool) without Auxiliary Heat
STEP 1 - Connect O wire to the O terminal or B wire to the B. This connects the change-over valve.
If you have both O and B - connect only the O wire to the O terminal and DO NOT connect B to B terminal (see
wire reference under Trane for B wire terminal).
STEP 2 - Connect the Y wire to Y terminal. This connects the compressor.
STEP 3 - Connect the R wire to RH. This connects the power.
STEP 4 - Connect the G wire to the G. This connects the fan.
STEP 5 - Optional - Connect the C wire to the C terminal.
Your HVAC system is now connected to the CT110.
Please Go To Page 6
HVAC SYSTEM
G R Y Y
2
THERMOSTAT TERMINAL
HVAC SYSTEM
THERMOSTAT TERMINAL
16
PG
W W C
2
or
or