59
TYPICAL WIRING SCHEMATIC (cont)
LEGEND FOR TYPICAL WIRING SCHEMATIC
AHA —
Adjustable Heat Anticipator
C —
Contactor, Compressor
CAP —
Capacitor
CB —
Circuit Breaker
CC —
Cooling Compensator
COM —
Common
COMP —
Compressor Motor
D —
Diode
EC —
Enthalpy Control
ECON —
Economizer
EPS —
Emergency Power Supply (9-Volt Battery)
EQUIP —
Equipment
ER —
Economizer Relay
FPT —
Freeze-Protection Thermostat
FU —
Fuse
GND —
Ground
GVR —
Gas Valve Relay
HPS —
High-Pressure Switch
HS —
Hall Effect Sensor
HV —
High Voltage
I —
Ignitor
IDM —
Induced-Draft Motor
IFC —
Indoor (Evaporator) Fan Contactor
IFM —
Indoor (Evaporator) Fan Motor
IGC —
Integrated Gas Unit Controller
LED —
Light-Emitting Diode
LPS —
Low-Pressure Switch/Loss-of-Charge
LS —
Limit Switch
MGV —
Main Gas Valve
MTR —
Motor
NC —
Normally Closed
NO —
Normally Open
OAT —
Outdoor-Air Thermostat
OFC —
Outdoor (Condenser) Fan Contactor
OFM —
Outdoor (Condenser) Fan Relay
PL —
Plug Assembly
QT —
Quadruple Terminal
R —
Relay
RS —
Rollout Switch
SAT —
Supply-Air Thermostat
SEN —
Sensor
SW —
Switch
SW1 —
Switch Fully Open
SW2 —
Switch Fully Closed
SW3 —
Switch Minimum Vent Position
SW4 —
Switch Maximum Vent Position
TC —
Thermostat, Cooling
TH —
Thermostat, Heating
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 indicate common potential only.
Not to represent wiring.
DURABLADE ECONOMIZER ASSY
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