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Fig. 52 — Typical Unit Wiring Schematic (208/230-3-60 Unit Shown)
IFM — Indoor Fan Motor
IFMOVL — Indoor FanMotor Overload Switch
IGC — Integrated Gas Unit Controller
LPS — Low-Pressure Switch
LS — Limit Switch
MGV — Main Gas Valve
OFC — Outdoor Fan Contactor
OFM — Outdoor Fan Motor
P—Plug
PL — PlugAssembly
QT—Quadruple Terminal
RS — Rollout Switch
SAT — Supply Air Temperature Sensor
SEN — Sensor
TRAN — Transformer
Field Splice
Marked Wire
Terminal(Marked)
Terminal(Unmarked)
Terminal Block
Splice
Splice (Marked)
Factory Wiring
Field Control Wiring
Field Power Wiring
Accessory or Optional Wiring
To indicatecommon potentialonly;
not to represent wiring.
LEGEND
C—Contactor, Compressor
CB — Circuit Breaker
COMP — Compressor Motor
EQUIP — Equipment
FPT — Freeze Up Protection Thermostat
GND — Ground
HPS — High-Pressure Switch
HS — Hall-Effect Sensor
I—Ignitor
IDM — Induced-Draft Motor
IFC — Indoor Fan Contactor