5
69-2057EFS—03
System-specific wiring guides
Conventional systems
1H/1C System (1 transformer)
C 24VAC common
R Power [1]
Rc [R+Rc joined by jumper]
W Heat relay
Y Compressor contactor**
G Fan relay**
Heat-only System [3]
C 24VAC common
R Power [1]
Rc [R+Rc joined by jumper]
W Heat relay
Heat Only System With Fan [4]
C 24VAC common
R Power [1]
Rc [R+Rc joined by jumper]
W Heat relay
G Fan relay
Cool Only System [5]
C 24VAC common
R Power [1]
Rc [R+Rc joined by jumper]
Y Compressor contactor**
G Fan relay**
1H/1C System (2 transformers)
C 24VAC common
R Power (heating) [1]
Rc Power (cooling) [1, 2]
W Heat relay
Y Compressor contactor**
G Fan relay**
2H/2C System (1 transformer) [6]
C 24VAC common
R Power [1]
Rc [R+Rc joined by jumper]
W Heat relay (stage 1)
W2 Heat relay (stage 2)
Y Compressor contactor (stage 1)**
Y2 Compressor contactor (stage 2)
G Fan relay**
2H/2C System (2 transformers) [6]
C 24VAC common
R Power (heating) [1]
Rc Power (cooling) [1, 2]
W Heat relay (stage 1)
W2 Heat relay (stage 2)
Y Compressor contactor (stage 1)**
Y2 Compressor contactor (stage 2)
G Fan relay**
** [See note on bottom of page 4]
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Remove jumper (R to Rc) for systems with two transformers. Common connection must come
from cooling transformer.
[3] In Installer Setup, set system type to Heat Only, No Fan.
[4] In Installer Setup, set system type to Conventional with zero cooling stages.
[5] In Installer Setup, set system type to Conventional with zero heat stages.
[6] In Installer Setup, set system type to Conventional with 2 heat AND 2 cool stages.
[7] In Installer Setup, set changeover valve to O or B.
[8] In Installer Setup, set to Heat Pump with 1 compressor stage and no auxiliary heat stages.
[9] In Installer Setup, set to Heat Pump with 1 compressor stage and 1 auxiliary heat stage.
[10] In Installer Setup, set to Heat Pump with 2 compressor stages and no auxiliary heat stages.
[11] In Installer Setup, set to Heat Pump with 2 compressor stages and 1 auxiliary heat stage.
[12] “L” terminal sends a continuous output when thermostat is set to Em. Heat, and acts as a
system monitor when in Heat, Cool or Off modes.
See [notes] below.
To Next Page
Loading...
