Carrier 50TFQ008-012 Product Data page 34

Typical wiring schematic (cont)
AHA
AWG
C
CAP
CB
CC
CLO
COMP — Compressor Motor
D
DB
DFT
EC
ECON — Economizer
EPS
EQUIP — Equipment
ER
FPT
FU
GND
HC
HPS
HR
IFC
IFM
IFMOVL — Indoor-Fan Motor Overload
LPS
LSM
MCA
MTR
OAT
OFC
OFM
P
PL
1. If any of the original wire furnished must be replaced, it must be replaced with type 90 C
wire or its equivalent.
2. Three-phase motors are protected under primary single-phasing conditions.
3. Thermostat:
HH07AT172 and P272-2783
Subbase:
HH93AZ176, 178 and P272-1882, 1883
4. Set heat anticipator at 0.8 amp for first stage and 0.3 amp for second stage.
5. Use copper conductors only.
6. Use copper, copper-clad aluminum or aluminum conductors.
7.
34
LEGEND AND NOTES FOR TYPICAL WIRING SCHEMATIC
— Adjustable Heat Anticipator
— American Wire Gage
— Contactor, Compressor
— Capacitor
— Circuit Breaker
— Cooling Capacitor
— Compressor Lockout
— Diode
— Defrost Board
— Defrost Thermostat
— Enthalpy Control
— Emergency Power Supply
(Nine-Volt Battery)
— Economizer Relay
— Freeze-Up Protection Thermostat
— Fuse
— Ground
— Heater Contactor (Strip Heat)
— High-Pressure Switch
— Heater Relay
— Indoor-Fan Contactor
— Indoor-Fan Motor
— Low-Pressure Switch
— Limit Switch (Manual Reset)
— Minimum Circuit Amps
— Motor
— Outdoor-Air Thermostat
— Outdoor-Fan Contactor
— Outdoor-Fan Motor
— Plug
— Plug Assembly
CB
VOLTAGE
RATING
Manufacturer's Part No.
Potter & Brumfield
24 V
W28X-1024-3.2
— Quadruple Terminal
QT
R — Relay
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
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.
NOTES
MUST TRIP
AMPS
3.2