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TYPICAL WIRING SCHEMATICS — 581A
LEGEND
AHA — Adjustable Heat Anticipator
C—Contactor, Compressor
CAP — Capacitor
CB — Circuit Breaker
CC — Cooling Compensator
CH — Crankcase Heater
CLO — Compressor Lockout
COMP — Compressor Motor
CR — Control Relay
DM — Damper Motor
DU — Dummy Terminal
EQUIP — Equipment
FPT — Freeze Protection Thermostat
FU — Fuse
GND — Ground
HPS — High-Pressure Switch
HS — Hall Effect Sensor
HV — High Voltage
I—Ignitor
IDM — Induced Draft Motor
IFC — Indoor Fan Contactor
IFM — Indoor (Evaporator) Fan Motor
IGC — Integrated Gas Unit Controller
L—Light
LOR — Lockout Relay
LPS — Low-Pressure Switch
LS — Limit Switch
MGV — Main Gas Valve
OFC — Outdoor Fan Contactor
OFM — Outdoor Fan Motor
PL — Plug Assembly
PRI — Primary
QT — Quadruple Terminal
RS — Rollout Switch
SW — Switch
TB — Terminal Block
TC — Thermostat-Cooling
TH — Thermostat-Heating
TRAN — Transformer
Terminal (Marked)
Terminal (Unmarked)
Terminal Block
Splice
Factory Wiring
Field Wiring
Option/Accessory Wiring
To indicate common potential
only. Not to represent wiring.
581A155, 460-3-60 Shown
a48-7474
581A155-300