Carrier 50HJQ004-007 Installation, Start-Up And Service Instructions Manual page 41

LEGEND AND NOTES FOR FIG. 43
AWG — American Wire Gage
AHA — Adjustable Heat Anticipator
C — Contactor, Compressor
CAP — Capacitor
CB — Circuit Breaker
CC — Cooling Compensator
CLO — Compressor Lockout
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
FSS — Filter Status Switch
FU — Fuse
GND — Ground
HC — Heater Contactor (Strip Heat)
HP — Heat Pump
HPS — High-Pressure Switch
HR — Heater Relay
IFC — Indoor-Fan Contactor
IFM — Indoor-Fan Motor
LPS — Low-Pressure Switch
LSM — Limit Switch (Manual Reset)
MTR — Motor
OAT — Outdoor-Air Thermostat
OFM — Outdoor-Fan Motor
OLR — Overload Relay
P — Plug
PL — Plug Assembly
NOTES:
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:
HH07AT170, 172, 174 and P272-2783
Subbase:
HH93AZ176, 178 and P272-1882, 1883.
4. Set heat anticipator at .8 amp for first stage and .3 for second stage.
5. Use copper conductors only.
6. Use copper, copper-clad aluminum or aluminum conductors.
7.
CB
VOLTAGE
RATING
MFG. PT. NO.
POTTER & BRUMFIELD
24 V
W28X-1024-3.2
QT — Quadruple Terminal
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.
MUST
TRIP
AMPS
3.2
41