Bryant 542J Series Installation, Start-Up And Service Instructions Manual page 26

AHA — Adjustable Heat Anticipator
BRK W/AT — Breaks With Amp Turns
C — Contactor, Compressor
CAP — Capacitor
CB — Circuit Breaker
CC — Cooling Compensator
CH — Crankcase Heater
CLO — Compressor Lockout
CLS — Cooling Lockout Switch
COMP — Compressor Motor
CT — Current Transformer
CTD — Compressor Time Delay
DB — Defrost Board
DFT — Defrost Thermostat
DM — Damper Motor
DR — Defrost Relay
DU — Dummy Terminal
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 — Heat 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) is thermally protected. Three-phase
motors are protected against primary single-phasing conditions.
2. If any of the original wire furnished must be replaced, it must be re-
placed with type 90° C or its equivalent.
3. Jumpers are omitted when unit is equipped with economizer.
4. Set thermostat heat anticipator(s) according to electric heat chart.
5. The CB1 and CB2 must trip amps are equal to or less than 156%
FLA, and IFCB must trip amps are equal to or less than 140% FLA.
6. Number(s) indicates the line location of used contacts. A bracket over
2 numbers signifies a single-pole, double-throw contact. An under-
lined number signifies a normally-closed contact. Plain (no line) num-
ber signifies a normally-open contact.
LEGEND AND NOTES FOR FIG. 33
7. TRAN1 and 2 are wired for 230-v units. If 208/230-v unit is to be run
with 208-v power supply. TRAN1 and 2 must be rewired as follows:
a. On both TRAN1 and TRAN2, disconnect the black wire from the
orange wire.
b. On both TRAN1 and TRAN2, connect the black wire to the red
wire.
c. Apply wirenuts to the orange TRAN1 and TRAN2 wires.
8. The CLO locks out the compressor to prevent short cycling on com-
pressor overload and safety devices. Before replacing CLO, check
these devices.
9. Remove jumper between terminals RC an RH.1.
—26—
LOR — Lockout Relay
LPS — Low-Pressure Switch
LS — Limit Switch
MAT — Mixed-Air Thermostat
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
Terminal (Marked)
Terminal (Unmarked)
Terminal Block
Splice
Factory Wiring
Field Wiring
To indicate common potential only,
not to represent wiring
Option/Accessory Wiring