Carrier 50HJQ016 Installation, Start-Up And Service Instructions Manual page 28

LEGEND AND NOTES FOR FIG. 39
— Adjustable Heat Anticipator
AHA
BRK W/AT — Breaks With Amp Turns
C — Contactor, Compressor
CAP — Capacitor
CB — Circuit Breaker
CC — Cooling Compensator
CH — Crankcase Heater
CLO — Compressor Lockout
COM — Common
COMP — Compressor Motor
CR — Compressor Relay
CT — Current Transformer
CTD — Compressor Time Delay
DAT — Discharge Air Thermistor
— Defrost Board
DB
— Defrost Thermostat
DFT
— Damper Motor
DM
DR — Defrost Relay
DU — Dummy Terminal
EC — Enthalpy Control
EQUIP — Equipment
FL — Fuse Link
FLA — Full Load Amps
FPT — Freeze Protection Thermostat
FU — Fuse
GND — Ground
HC — Heater Contactor
HPS — High-Pressure Switch
HR — Heater Relay
HTR — Heater
IFC — Indoor-Fan Contactor
IFCB — Indoor Fan Circuit Breaker
IFM — Indoor-Fan Motor
IP — Internal Protector
L — Light
NOTES:
1. Compressor and/or fan motor(s) thermally protected. Three phase motors protected against
primary single phasing conditions.
2. If any of the original wire furnished must be replaced, it must be replaced with type 90 C wire
or its equivalent.
3. TRAN1 is wired for 230 v operation. If unit is 208 v, disconnect the black wires from the ORN
TRAN wire and reconnect to the RED TRAN wire, apply wirenuts to wires.
4. CB1, 2 must trip amps are equal to or less than 156% FLA, IFCB, 140%.
5. The CLO locks out the compressor to prevent short cycling on compressor overload and safety
devices; before replacing CLO, check these devices.
6. Jumpers are omitted when unit is equipped with economizer.
7. Number(s) indicates the line location of used contacts. A bracket over (2) numbers signifies a
single pole, double throw contact. An underlined number signifies a normally closed contact.
Plain (no line) number signifies a normally open contact.
8. Remove jumper between RC & RH.
LEGEND
LOR — Lockout Relay
LPS — Low-Pressure Switch
LS — Limit Switch
NEC — National Electrical Code
OAT — Outdoor-Air Thermostat
OF — Outdoor-Fan
OFC — Outdoor-Fan Contactor
OFM — Outdoor-Fan Motor
OP — Overcurrent Protector
PL — Plug Assembly
QT — Quadruple Terminal
RVR — Reversing Valve Relay
RVS — Reversing Valve Solenoid
TB — Terminal Block
TC — Thermostat-Cooling
TH — Thermostat-Heating
TRAN — Transformer
U — Unloader
— Unloader Relay
UR
Terminal (Marked)
Terminal (Unmarked)
Terminal Block
Splice
Factory Wiring
Field Wiring
Field Power Wiring
Optional/Accessory Wiring
To indicate common potential only;
not to represent wiring.
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