Bryant 581A/B User Manual
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TYPICAL WIRING SCHEMATICS — 579F
(579F240, 208/230 V Shown) (cont)
AHA
— Adjustable Heat Anticipator
BKR W/AT — Breaker with Amp Turns
C
— Contactor, Compressor
CB
— Circuit Breaker
CC
— Cooling Compensator
CLO
— Compressor Lockout
COMP
— Compressor Motor
CR
— Control Relay
CT
— Control Transformer
DM
— Damper Motor
DU
— Dummy Terminal
EQUIP
— Equipment
FPT
— Freeze Protection Thermostat
FU
— Fuse
GND
— Ground
HPS
— High-Pressure Switch
HS
— Hall Effect Sensor
HV
— High Voltage
I
— Ignitor
IDM
— Induced-Draft Motor
IFC
— Indoor-Fan Contactor
IFCB — Indoor-Fan Circuit Breaker
IFM
— Indoor-Fan Motor
IGC
— Integrated Gas Unit Controller
L
— Light
LED — Light-Emitting Diode
LOR — Lockout Relay
LPS — Low-Pressure Switch
LS
— Limit Switch
MGV — Main Gas Valve
NEC — National Electrical Code
OFC — Outdoor-Fan Contactor
OFM — Outdoor-Fan Motor
PL
— Plug Assembly
PRI
— Primary
RS
— Rollout Switch
SN
— Sensor
SR
— Solenoid Relay
SW
— Switch
TB
— Terminal Block
TC
— Thermostat Cooling
TH
— Thermostat Heating
TRAN — Transformer
Terminal (Marked)
Terminal (Unmarked)
Terminal Block
Splice
Splice (Marked)
Splice (Field Supplied)
Factory Wiring
Field Control Wiring
Field Power Wiring
Accessory or Optional Wiring
To indicate common potential
only; not to represent wiring.
NOTES:
1. Compressor and fan motors 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. Jumpers are omitted when unit is equipped with economizer.
4. IFCB must trip amps is equal to or less than 140% full load amps.
5. On 208/230-v unit, TRAN1 is factory wired to ORN lead for 230-v power supply. If unit is to run on 208-v power supply, TRAN1
must be rewired. Disconnect the BLK wire on TRAN1 and connect wire to 208-v RED wire. Insulate 230-v ORN wire.
6. The CLO locks out the compressor to prevent short cycling on compressor overload and safety devices. Before replacing CLO,
check these devices.
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. A plain (no line) number signifies a normally open contact.
LEGEND AND NOTES
LEGEND
a48-5655
0TF
Q004
-0
12
5
7
9
F
18
0-
300