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Single Stage Heat – Boiler
Example: Bosch Greenstar Gas Condensing Boilers*
▶ Ensure the system has a C-wire
▶ Ensure the pre-installed jumper wire remains between RH and RC
▶ Connect the R, C and W1 wires from the boiler to R/RC, C and W/E/AUX
terminals on the wall plate, respectively
*NOTE: Bosch Greenstar boilers will require an external transformer to power the
thermostat. First remove pre-installed jumper and then connect the dry contacts
on the boiler to RH and W/E/AUX on the boiler and the transformer terminals
will connect to R/RC and C on the thermostat
Combined Single Stage Heat and Single Stage
Cool Furnace and Air Conditioner
▶ Ensure the system has a C-wire
▶ Remove the pre-installed jumper wire from between RH and R/RC
▶ Connect the R, C, W1 and G wires from the Furnace to RH, C,
W/E/AUX and G terminals on the wall plate, respectively
▶ Connect the R, C, Y1 and G wires from the Air Conditioner to R/RC, C, Y
and G terminals on the wall plate, respectively
Wiring Diagrams
R/RC
R/RC
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