7
Wiring
Terminal
Function
C
24V Common or Neutral
R
24V AC - This voltage is switched back through the relays
Hi
Indoor Fan High Speed (NOT Used in Single fan speed mode -
Sw 1 = OFF)
med
Indoor Fan medium Speed (NOT Used in Single fan speed mode -
Sw 1 = OFF)
Low
Indoor Fan Low Speed (Used in single and three fan speed mode)
Y
Compressor or Cool - (Based on Sw 2 setting)
W - O/B
Reversing Valve or Heat - (Based on Sw 2 setting)
A1 – Cool
0 to 10V Output for Cooling (Typically used to control modulating valves)
A2 – Heat
0 to 10V Output for Heating (Typically used to control modulating valves)
A3 – Fan
0 to 10V modulating Output for Indoor DC Fan
Com – 0V
0V terminal - Used for 0 to 10V, sensor or digital inputs ground reference
A
modBus Data A
B
modBus Data B
SI
Remote temperature sensor input (Remote/average/modBus data use)
DI
Digital (Switched input) for forced unoccupied or initiate doorbell
function
