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Bryant 576C - User Manual

Bryant 576C
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Cancels: II 569D-72-1 II 569D-72-2
9/15/04
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-14
I. Complete Pre-Installation Checks . . . . . . . . . . . . . . 1
II. Rig and Mount the Unit . . . . . . . . . . . . . . . . . . . . . . . 9
III. Complete Refrigerant Piping
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
IV. Install Accessories . . . . . . . . . . . . . . . . . . . . . . . . . 11
V. Complete Electrical Connections. . . . . . . . . . . . . . 11
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
I. System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
II. Leak Test and Dehydration . . . . . . . . . . . . . . . . . . . 15
III. Turn On Crankcase Heater . . . . . . . . . . . . . . . . . . . 15
IV. Preliminary Charge . . . . . . . . . . . . . . . . . . . . . . . . . 15
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-20
I. 569D, 566E, 569F Units . . . . . . . . . . . . . . . . . . . . . . 15
II. 576C, 566D Units . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
OPERATING SEQUENCE. . . . . . . . . . . . . . . . . . . . . . . . 20, 21
I. Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
II. Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-24
I. Capacity Control (576C, 566D Units) . . . . . . . . . . . 21
II. Head Pressure Control
(566D, 566E150-240 Units Only) . . . . . . . . . . . . . 21
III. Time Guard II Circuit (566D Only). . . . . . . . . . . . . . 21
IV. Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . . . . . 22
V. Compressor Protection . . . . . . . . . . . . . . . . . . . . . . 22
VI. Low-Pressure Switches. . . . . . . . . . . . . . . . . . . . . . 22
VII. High-Pressure Switches . . . . . . . . . . . . . . . . . . . . . 22
VIII. Discharge Gas Thermostat . . . . . . . . . . . . . . . . . . . 22
IX. Outdoor Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
X. Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
XI. Coil Cleaning and Maintenance . . . . . . . . . . . . . . . 22
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . 25, 26
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . CL-1, CL-2
SAFETY CONSIDERATIONS
Installing, starting up, and servicing air-conditioning equip-
ment can be hazardous due to system pressures, electrical
components, and equipment location (roofs, elevated struc-
tures, etc.).
Only trained, qualified installers and service mechanics
should install, start-up, and service this equipment.
Untrained personnel can perform basic maintenance func-
tions such as cleaning coils. All other operations should be
performed by trained service personnel.
When working on the equipment, observe precautions in
the literature and on tags, stickers, and labels attached to
the equipment.
Follow all safety codes. Wear safety glasses and work gloves.
Keep quenching cloth and fire extinguisher nearby when
brazing. Use care in handling, rigging, and setting bulky
equipment.
INSTALLATION
I. COMPLETE PRE-INSTALLATION CHECKS
A. Uncrate Unit
Remove unit packaging except for the top skid assembly,
which should be left in place until after the unit is rigged
into its final location.
B. Inspect Shipment
File claim with shipping company if shipment is damaged or
incomplete.
C. Consider System Requirements
• Consult local building codes and National Electrical Code
(NEC) for special installation requirements.
• Allow sufficient space for airflow clearance, wiring, refrig-
erant piping, and servicing unit. See Fig. 1-4 for unit
dimensions and weight distribution data.
• Locate unit so that outdoor coil (condenser) airflow is
unrestricted on all sides and above.
• Unit may be mounted on a level pad directly on the base
channels or mounted on a raised structural steel frame.
See Tables 1A to 1C for unit operating weights. See
Fig. 1-4 for weight distribution based on recommended
support points.
NOTE: If vibration isolators are required for a particular
installation, use the data in Fig. 1-4 to make the proper
selection.
WARNING: Before installing or servicing system,
always turn off main power to system and install lock-
out tag on disconnect. There may be more than one dis-
connect switch. Electrical shock can cause personal
injury.
installation, start-up and
service instructions
COMMERCIAL AIR-COOLED
CONDENSING UNITS
566D/E
569D/F
576C
Sizes 072-240
6to20Tons

Table of Contents

Questions and Answers

  • C
    Cody RobertsAug 20, 2025
    What to do if Bryant 576C Air Conditioner compressor is running but cooling is insufficient?
    • B
      benjamin66Aug 20, 2025
      If the compressor is running but cooling is insufficient, it could be due to suction pressure issues. If the suction pressure is low: * Add refrigerant. * Check the refrigerant charge and outdoor-air fan thermostat settings. * Clean or replace the filters. * Replace the power head. * Check the low-pressure setting. * Remove any obstructions. If the suction pressure is high: * Check the unloader adjustments and setting. * Check for open doors or windows near the fan coil.
  • M
    mgreenAug 23, 2025
    Why does my Bryant Air Conditioner unit operate too long or continuously?
    • J
      Jessica WashingtonAug 23, 2025
      If the unit operates too long or continuously, try the following: 1. Add refrigerant. 2. Replace the control. 3. Purge and evacuate the system. 4. Clean or replace components as needed.
  • B
    Brian WilliamsAug 26, 2025
    What causes a Bryant 576C compressor to lose oil?
    • J
      jason23Aug 26, 2025
      If the compressor loses oil: 1. Repair any leaks. 2. Check the wiring and relays. Check the heater and replace if defective. 3. Check the piping for oil return and replace if necessary.
  • M
    melissasmithAug 28, 2025
    What causes a frosted suction line on my Bryant 576C Air Conditioner?
    • M
      Mrs. Stephanie Green MDAug 28, 2025
      If the suction line is frosted, adjust the expansion valve.
  • A
    Audrey GarciaAug 30, 2025
    Why is the liquid line hot on my Bryant 576C Air Conditioner?
    • S
      sarah49Aug 31, 2025
      If the liquid line is hot: 1. Repair any leaks and recharge the system. 2. Adjust the expansion valve.
  • R
    ryan24Sep 2, 2025
    What causes a frosted liquid line on my Bryant 576C Air Conditioner?
    • T
      todd34Sep 2, 2025
      If the liquid line is frosted: 1. Remove any restrictions or replace the affected component. 2. Replace the valve.
  • B
    Brian OlsenSep 4, 2025
    Why does my Bryant Air Conditioner compressor stop on high-pressure switch?
    • M
      mandy32Sep 5, 2025
      The compressor might be stopping due to the high-pressure switch. This could be related to the outdoor fan. If the outdoor fan is on: * Consider replacing the switch. * Confirm the fan's rotation and correct it if necessary. * Remove any obstructions blocking the fan. * Clear the airflow area around the fan. * Recover refrigerant and recharge as needed. * Recover refrigerant as required. * Consult the power company. * Check or replace the filter drier and expansion valve. Ensure the compressor discharge service valve is fully open. If the outdoor fan is off: * Tighten the fan hub setscrews. * Check the power and capacitor. * Replace the bearings. * Check the overload rating and look for any obstructions to the fan blade. * Replace the motor if necessary.
  • V
    Valerie NashSep 7, 2025
    What causes my Bryant 576C Air Conditioner compressor to cycle on the low-pressure switch?
    • A
      Andrew MaxwellSep 7, 2025
      The cycling of the compressor on the low-pressure switch can be due to several reasons. If the indoor-air fan is running, try these: * Open the valve fully. * Check the liquid line solenoid valve(s) for proper operation and replace if necessary. * Replace the filter drier. * Replace the power head. * Add charge, and check the low-pressure switch setting. If the airflow is restricted: * Check the refrigerant charge. * Clean the coil fins. * Clean or replace the filters. * Check the damper operation and position. If the indoor-air fan is stopped: * Tighten all connections. * Replace the relay. * Check the power supply. * Replace the motor. * Replace or tighten the belt.
  • S
    scottgonzalezSep 10, 2025
    Why is my Bryant 576C Air Conditioner system noisy?
    • K
      Kelsey SchroederSep 10, 2025
      If the system is noisy: 1. Support the piping as required. 2. Check the valve plates for valve noise. Replace the compressor if the bearings are worn.
  • G
    George SandersSep 12, 2025
    What to do if Bryant Air Conditioner compressor will not unload?
    • D
      Douglas MorrisonSep 12, 2025
      If the compressor will not unload: 1. Replace the unloader. 2. Replace the valve. 3. Rewire correctly. 4. Replace the spring.

Summary

COMPLETE REFRIGERANT PIPING CONNECTIONS

ELECTRICAL CONNECTIONS

Power Wiring and Grounding

Guidelines for routing power wires, installing disconnect switches, and ensuring proper unit grounding.

PRE-START-UP PROCEDURES

System Checks and Leak Testing

Comprehensive checks of unit components, leak testing, dehydration, and crankcase heater operation.

Preliminary Charge and Unit Start-Up

Steps for preliminary refrigerant charging and initial start-up checks for specific unit models.

COMPRESSOR PROTECTION AND START-UP

Unit Start-Up and Refrigerant Charge Adjustment

Procedures for starting the unit and adjusting refrigerant charge based on operating conditions.

FINAL CHECKS AND OIL MANAGEMENT

SERVICE AND CONTROL ADJUSTMENTS

COMPRESSOR PROTECTION AND SAFETY SWITCHES

COIL CLEANING AND MAINTENANCE

Cleaning Standard and E-Coated Coils

Procedures for cleaning standard and E-coated condenser coil surfaces for optimal performance.

TROUBLESHOOTING: COMPRESSOR ISSUES

Compressor Not Running

Common causes and solutions for the compressor failing to start.

Compressor Stops on High-Pressure Switch

Troubleshooting steps when the compressor stops due to high-pressure switch activation.

Compressor Cycles on Low-Pressure Switch

TROUBLESHOOTING: PERFORMANCE AND SYSTEM ISSUES

Compressor Cycling and Performance Problems

START-UP CHECKLIST: PRELIMINARY CHECKS

Outdoor Unit and Power Supply Checks

Controls, Indoor Unit, and Piping Checks

Voltage Imbalance Check Procedure

START-UP MEASUREMENTS AND RECORDING

Bryant 576C Specifications

General IconGeneral
TypeCentral Air Conditioner
SEER RatingUp to 16
Compressor TypeSingle-Stage
RefrigerantR-410A
HSPFNot Applicable
Cooling CapacityUp to 5 tons
Warranty10-year parts limited warranty upon timely registration
Cooling StagesSingle-Stage

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