ALM — Alarm
CB — Circuit Breaker
COM — Common
CR — Control Relay
DMS — Damper Motor Switch
DPS — Discharge Pressure Switch
DU — Dummy Terminal
EAT — Entering-Air Temperature
EC — Enthalpy Control
ECON — Economizer
ECR — Economizer Control Relay
EOR — Economizer Outdoor-Air Relay
FS — Fan Switch
HC — Heater Contactor
HIR — Heat Interlock Relay
IDC — Induced Draft Contactor
IFC — Indoor (Evaporator) Fan Contactor
IGVM — Inlet Guide Vane Motor
IP — Internal Protector
J—Pin Terminal Connector
LAT — Leaving-Air Temperature
LPS — Low-Pressure Switch
LS — Limit Switch
MTR — Motor
NC — Normally Closed
NO — Normally Open
OFC — Outdoor (Condenser) Fan Contactor
OMR — Outdoor (Condenser) Fan Motor Relay
PEC — Power Exhaust Contactor
PEDM — Power Exhaust Damper Motor
PEDMS — Power Exhaust Damper Motor Switch
PL — Plug
POT — Potentiometer
RES — Resistor
SCT — Safety Circuit
TB — Terminal Block
TRAN — Transformer
U—Unloader
LEGEND
Fig. 36 — Typical Control Wiring; 034,044 Units Shown
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