Typical Wiring Schematic — 50Tfq008-012 - Carrier 50TFQ004 Product Data

Typical wiring schematic — 50TFQ008-012
64
LEGEND
AHA — Adjustable Heat Anticipator
C — Contactor, Compressor
CAP — Capacitor
CB — Circuit Breaker
CC — Cooling Capacitor
— Crankcase Heater
CH
COMP — Compressor Motor
D — Diode
DB — Defrost Board
DFT — Defrost Thermostat
EC — Enthalpy Control
ECON — Economizer
EPS — Emergency Power Supply
(Nine-Volt Battery)
EQUIP — Equipment
ER — Economizer Relay
FPT — Freeze-Up Protection
Thermostat
FU — Fuse
GND — Ground
HC — Heater Contactor (Strip Heat)
HPS — High-Pressure Switch
HR — Heater Relay
IFC — Indoor-Fan Contactor
IFM — Indoor-Fan Motor
— Indoor-Fan Motor
IFMOVL
Overload Switch
LPS — Low-Pressure Switch
LSM — Limit Switch (Manual Reset)
MCA — Minimum Circuit Amps
MTR — Motor
OAT — Outdoor-Air Thermostat
OFC — Outdoor-Fan Contactor
OFM — Outdoor-Fan Motor
P — Plug
PL — Plug Assembly
— Relay
R
RVS — Reversing Valve Solenoid
SAT — Supply-Air Thermostat
SW1 — Switch Fully Open
SW2 — Switch Fully Closed
SW3 — Switch Min. Vent Position
SW4 — Switch Max. Vent Position
TB — Terminal Block
— Thermostat-Cooling
TC
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.