Carrier 50TJ016-028 User Manual
Page 31
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LEGEND AND NOTES FOR FIG. 37 AND 38
LEGEND
AHA
— Adjustable Heat Anticipator
BRK W/AT — Breaks with Amp Turns
C
— Contactor, Compressor
CB
— Circuit Breaker
CC
— Cooling Compensator
CH
— Crankcase Heater
CLO
— Compressor Lockout
COMP
— Compressor Motor
CR
— Control Relay
DAT
— Discharge Air Thermistor
DM
— Damper Motor
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
HTR — Heater
IFC
— Indoor-Fan Contactor
IFCB — Indoor-Fan Circuit Breaker
IFM
— Indoor-Fan Motor
IFR
— Indoor-Fan Relay
L
— Light
LOR — Lockout Relay
LPS — Low-Pressure Switch
LS
— Limit Switch
NEC — National Electrical Code
OAT — Outdoor-Air Thermostat
OFC — Outdoor-Fan Contactor
OFM — Outdoor-Fan Motor
OP
— Overcurrent Protection
PL
— Plug Assembly
PRI
— Primary
TB
— Terminal Block
TC
— Thermostat Cooling
TH
— Thermostat Heating
TRAN — Transformer
Terminal (Marked)
Terminal (Unmarked)
Terminal Block
Splice
Factory Wiring
Field Control Wiring
Option/Accessory Wiring
To indicate common potential
only; not to represent wiring.
NOTES:
1. Compressor and fan motor(s) thermally protected; 3-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 (60 Hz) or 220 v (50 Hz) operation. If unit is 208 v, dis-
connect the black wires from the ORN TRAN wire and reconnect to the RED
TRAN wire, apply wirenuts to wires.
5. IFCB must trip amps is equal to or less than 140% FLA.
6. The CLO locks out the compressor to prevent short cycling on compressor over-
load and safety devices. Before replacing CLO, check these devices.
7. Jumpers are omitted when unit is equipped with EconoMi$er.
8. Number(s) indicates the line location of used contacts. A bracket over (2) num-
bers signifies a single-pole, double-throw contact. An underlined number sig-
nifies a normally closed contact. Plain (no line) number signifies a normally open
contact.