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STEP 1 - Connect the W wire to the W terminal. This connects the 1st Stage of HEAT.
STEP 2 - Connect the W2 wire to the W2 Terminal. This connects the 2nd Stage of HEAT.
STEP 3 - Connect the Y wire to the Y terminal. This connects the 1st Stage of COOL.
STEP 4 - Connect the Y2 wire to the Y2 terminal. This connects the 2nd Stage of COOL.
STEP 5 - Connect the RH or R wire to the RH terminal.This connects
the power.
STEP 6 - Connect the G wire to the G terminal. This connects the fan.
STEP 7 - Set HVAC selection switches to NORMAL and:
If you have gas or oil heat, set the HEAT TYPE to GAS.
If you have electric heat, set the HEAT TYPE to ELEC.
Your HVAC system is now connected to the CT50.
Please Go To Page 6
W RH [A?]
3 Wire Zoned Hot Water
For Solenoid valve or Motor valve connect the wires based on diagrams below to the correct terminal
on the CT50. USE ONLY IN HEAT MODE. The third wire on your valve may be called 6, Y, or G (see
page 18).
C H B O W
W Y Y
RH RC G A
2
2
Terminals
2 Stage Heat and 2 Stage Cool
Motor Valve
W R A
C H B O W
Terminals
Terminals
Solenoid Valve
A
W
R
W Y Y
RH RC G A
2
2
HVAC SYSTEM
C
W
Y
W2
REMOTE
POWER
C H B O W
W Y Y
RH RC G A
2
2
16
PG
RH RC
G
Y2
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