Terminal Designations - Honeywell LR-HWLV-HVAC Installation Manual

Installation Guide
Wiring

Terminal Designations

Conventional Terminal Letters:
R Heating power. Connect to secondary
side of heating system transformer.
Rc Cooling power. Connect to secondary
side of cooling system transformer.
C Common wire from secondary side
of cooling transformer (if 2 transform-
ers). [3]
W 1st stage heat relay.
W2 2nd stage heat relay
Y 1st stage compressor contactor.
Y2 2nd stage compressor contactor.
G Fan relay.
K Optional THP9045 Wiring Module
Terminal [9]
S1/S2 Optional remote sensor
1H/1C Heat Pump (no auxiliary heat)
Rc Power [1]
R [R+Rc joined by jumper]
O/B Changeover valve [5]
Y Compressor relay
G Fan relay
C 24 V common [3]
K Optional THP9045 Wiring Module
Terminal [9]
S1/S2 Optional remote sensor
2H/1C Heat Pump (with auxiliary heat)
L Equipment monitor [6, 7]
Aux/E Auxiliary heat relay (Heat 2) [8]
Rc Power [1]
R [R+Rc joined by jumper]
O/B Changeover valve [5]
Y Compressor relay
G Fan relay
C 24 V common [3]
K Optional THP9045 Wiring Module
Terminal [9]
S1/S2 Optional remote sensor
See [notes] below
[1] Power supply. Provide disconnect means and overload protection as required.
[3] Connection to 24 V
[5] O/B set to control as either O or B in installer setup.
[6] If L terminal is used, 24 V
[7] Heat pump reset (powered continuously when thermostat is set to Em. Heat mode; system monitor
when set to Heat, Cool, or OFF).
[9] See page 14 for more details.
P/N 041-338 Rev. A
Wiring guide—heat pump systems
common at the transformer is required.
common (terminal C) must be connected.
Heat Pump Terminal Letters:
R Heating power. Connect to secondary
side of heating system transformer.
Rc Cooling power. Connect to secondary
side of cooling system transformer.
C Common wire from secondary side of
cooling system transformer. [3]
Y 1st stage compressor contactor.
Y2 2nd stage compressor contactor.
Aux/E Auxiliary heat relay.
G Fan relay.
L Heat pump reset (powered continu-
ously when System is set to Em Heat;
system monitor when set to Heat,
Cool or Off).
O/B Changeover valve for heat pumps.
K Optional THP9045 Wiring Module
Terminal [9]
S1/S2 Optional remote sensor
2H/2C Heat Pump (no auxiliary heat)
Y2 Compressor 2 relay
Rc Power [1]
R [R+Rc joined by jumper]
O/B Changeover valve [5]
Y Compressor 1 relay
G Fan relay
C 24 V common [3]
K Optional THP9045 Wiring Module
Terminal [9]
S1/S2 Optional remote sensor
3H/2C Heat Pump (with auxiliary heat)
Y2 Compressor 2 relay
L Equipment Monitor [6, 7]
Aux/E Auxillary heat relay (Heat 2) [8]
Rc Power
R [R+Rc joined by jumper]
O/B Changeover value [5]
Y Compressor 1 relay
G Fan relay
S1/S2 Optional remote sensor
C 24 V common [3]
K Optional THP9045 Wiring Module
Terminal [9]
4 69-2655EFS—01