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Bryant 566E - User Manual

Bryant 566E
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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
    Carlos WilsonAug 20, 2025
    What to do if Bryant 566E Air Conditioner compressor is running but cooling is insufficient?
    • B
      Bryan HernandezAug 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.
  • K
    Krista HolmesAug 23, 2025
    Why does my Bryant 566E unit operate too long or continuously?
    • H
      heather16Aug 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.
  • S
    Stephanie CummingsAug 26, 2025
    What causes a Bryant 566E compressor to lose oil?
    • K
      Kyle BullockAug 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.
  • N
    Natalie WilliamsAug 28, 2025
    What causes a frosted suction line on my Bryant Air Conditioner?
    • L
      Logan WilliamsAug 28, 2025
      If the suction line is frosted, adjust the expansion valve.
  • J
    jessicamarksAug 30, 2025
    Why is the liquid line hot on my Bryant Air Conditioner?
    • M
      Maria LarsonAug 31, 2025
      If the liquid line is hot: 1. Repair any leaks and recharge the system. 2. Adjust the expansion valve.
  • J
    Julie OliverSep 2, 2025
    What causes a frosted liquid line on my Bryant Air Conditioner?
    • D
      Dorothy MorganSep 2, 2025
      If the liquid line is frosted: 1. Remove any restrictions or replace the affected component. 2. Replace the valve.
  • T
    Terry CoxSep 5, 2025
    Why does my Bryant Air Conditioner compressor stop on high-pressure switch?
    • F
      fjonesSep 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.
  • M
    Mark BrewerSep 7, 2025
    What causes my Bryant Air Conditioner compressor to cycle on the low-pressure switch?
    • R
      Richard OneillSep 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.
  • C
    Charles HowardSep 9, 2025
    Why is my Bryant Air Conditioner system noisy?
    • F
      frankmarvinSep 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.
  • J
    jessica39Sep 12, 2025
    What to do if Bryant 566E compressor will not unload?
    • J
      Jordan MilesSep 12, 2025
      If the compressor will not unload: 1. Replace the unloader. 2. Replace the valve. 3. Rewire correctly. 4. Replace the spring.

Summary

INSTALLATION

I. Complete Pre-Installation Checks

Initial checks before unit installation, including uncrating and system requirements.

V. Complete Electrical Connections

PRE-START-UP

I. System Check

II. Leak Test and Dehydration

Procedures for leak testing and removing moisture from the system.

TROUBLESHOOTING

COMPRESSOR DOES NOT RUN

Common problems and solutions when the compressor fails to start.

RIG AND MOUNT THE UNIT

REFRIGERANT PIPING SIZES

ADVANCED SCROLL TEMPERATURE PROTECTION (ASTP)

PRELIMINARY OIL CHARGE

TROUBLESHOOTING (cont)

COMPRESSOR CYCLES ON LOW-PRESSURE SWITCH

Causes and solutions for the compressor cycling on low pressure.

START-UP CHECKLIST

START-UP

III. START-UP

Bryant 566E Specifications

General IconGeneral
SEER RatingUp to 16 SEER
RefrigerantR-410A
Sound LevelAs low as 72 dB
Cooling Capacity18, 000 - 60, 000 BTU/h
CompressorScroll
Warranty10-year limited warranty on compressor

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