Radio Thermostat CT110, Install Manual

PG

 16

O

 or 

B AUX

n

Y

n

 RH G

Multi-stage Heat Pump with Multi-stage Aux Heat 

The CT110 can handle up to 2 stages of Pump compression and 2 stages of AUX 

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 AUX 1, AUX 2, to the AUX 1 and 2 respectively. This connects 

the auxiliary heat.

STEP 3 - Connect the Y and Y2 wires to the Y terminals respectively.  

This connects the compressor.

STEP 4 - Connect the R wire to RH terminal. This connects the power.

STEP 5 - Connect the G wire to  G terminal. This connects the fan.

STEP 6 -  Optional - Connect the C wire to the C terminal.

Your HVAC system is now connected to the CT110.

  Please Go To Page 6        

 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     

THERMOSTAT TERMINAL

HVAC SYSTEM

W

Y

Y

G R

C

W

2

2

THERMOSTAT TERMINAL

HVAC SYSTEM

or

or