Bryant 581A Manual

A SERVICE OF

next previous

—32—

LEGEND

Fig. 38 — Typical Wiring Schematic and Fig. 39 — Typical Component Arrangement

AHA —

Adjustable Heat Anticipator

BKR W/AT —

Breaks with Amp Turns

BR —

Burner Relay

C—

Contactor, Compressor

CAP —

Capacitor

CB —

Circuit Breaker

CC —

Cooling Compensator

CH —

Crankcase Heater

CLO —

Compressor Lockout

CLS —

Compressor Lockout Switch

COMP —

Compressor Motor

CR —

Control Relay

CT —

Current Transformer

DM —

Damper Motor

DU —

Dummy Terminal

EQUIP —

Equipment

FPT —

Freeze Protection Thermostat

FU —

Fuse

GND —

Ground

GVR —

Gas Valve Relay

HPS —

High-Pressure Switch

HS —

Hall Effect Sensor

HV —

High Voltage

IDM —

Induced-Draft Motor

IFC —

Indoor (Evaporator) Fan Contactor

IFCB —

Indoor (Evaporator) Fan Circuit

Breaker

IFM —

Indoor (Evaporator) Fan Motor

IGC —

Integrated Gas Unit Controller

L—

Light

LED —

Light-Emitting Diode

LOR —

Lockout Relay

LPS —

Low-Pressure Switch

LS —

Limit Switch

MAT —

Mixed-Air Thermostat

MGV —

Main Gas Valve

NEC —

National Electrical Code

OAT —

Outdoor-Air Thermostat

OFC —

Outdoor (Condenser) Fan Contactor

OFM —

Outdoor (Condenser) Fan Motor

PL —

Plug Assembly

QT —

Quadruple Terminal

R—

Relay

RS —

Rollout Switch

SN —

Sensor

SW —

Switch

TB —

Terminal Block

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 pri-

mary 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 sig-

nifies a single-pole, double-throw contact. An underlined number signifies a normally

closed contact. A plain (no line) number signifies a normally open conta

ct.

Fig. 38 — Typical Wiring Schematic (581A180, 208/230 V Shown)