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TYPICAL WIRING SCHEMATICS — 549B, 549C
LEGEND
AWG — American Wire Gage
C—Contactor, Compressor
CAP — Capacitor
CB — Circuit Breaker
CLO — Compressor Lockout
COMP — Compressor Motor
DB — Defrost Board
DFT — Defrost Thermostat
FPT — Freeze Protection Thermostat
FU — Fuse
GND — Ground
HC — Heater Contactor (Electric Heater)
HPS — High-Pressure Switch
HR — Heater Relay
IFC — Indoor-Fan Contactor
IFM — Indoor-Fan Motor
LPS — Low-Pressure/Loss-of-Charge Switch
LSM — Limit Switch (Manual Reset)
OFM — Outdoor Fan Motor
OLR — Overload Relay
QT — Quadruple Terminal
RVS — Reversing Valve Solenoid
SAT — Supply-Air Thermostat
SW1 — Switch, Fully Open
TB — Terminal Block
TRAN — Transformer
Field Splice
Terminal (Marked)
Marked Wire
Terminal (Unmarked)
Terminal Block
Splice
Splice Marked
Factory Wiring
Field Control Wiring
Field Power Wiring
Accessory or Optional Wiring
To indicate common potential only.
Not to represent wiring.
549B036 208/230 v Shown
a50-8056
549B, 549C