COMMERCIAL AIR-COOLED
CONDENSING UNITS WITH
524A AIR-HANDLING UNITS
569D072-120
576C120
569F120
Models 566D, 566E, 569D,
569F, 576C
with 524A
6to20Tons
524A072-300
FEATURES/BENEFITS
These dependable split systems match Bryant’s indoor-air handlers and direct-expansion coils with outdoor condensing units
for a wide selection of commercial cooling solutions.
CONSTRUCTED FOR LONG LIFE — The569D(singlecircuit, scroll compressor), 576C (single circuit semi-hermetic
compressor), 569F/566E (dual circuit, scroll compressor) and
566D (semi-hermetic compressor) models are designed and
built to last. The copper tube-aluminum fin outdoor coil
construction provides years of trouble-free operation. Where
conditions require them, E-coated coils and pre-coated fin coils
are also available. Cabinets are constructed of prepainted
galvanized steel, delivering unparalleled protection from the
environment. Inside and outside surfaces are protected to
ensure long life, good looks, and reliable operation. Safety controls are used for enhanced system protection and reliability.
EFFICIENT OPERATION — Building owners will appreciate
the high unit EERs (Energy Efficiency Ratios) offered by these
condensing units. These units provide greater efficiency than
similar units in the marketplace, which translates into yearround operating savings.
CONTROLS FOR PERFORMANCE DEPENDABILITY — The
condensing units offer the building owner operating controls
and components designed for performance dependability. The
highly efficient hermetic and semi-hermetic compressors are
engineered for long life and durability. The compressors
include overload protection and vibration isolation for enhancement of quiet operation. The high-pressure switch protects the
entire refrigeration system from abnormally high operating
566D150-240
566E150-240
pressures. A low-pressure switch protects the system from
low-pressure conditions, including loss of charge.
The 569F120 and 566E150-240 units feature 2 scroll compressors and 2 refrigerant circuits that provide continuous air
conditioning and design flexibility. These units also include
Cycle-LOC™ anti-short-cycling protection which helps to
protect the units against compressor failure.
All units include a crankcase heater to eliminate liquid slugging
at start-up. Units with semi-hermetic compressors are also
equipped with an oil-level sight glass.
Latest safety standards are assured through UL and UL
Canada approvals.
INNOVATIVE BRYANT PACKAGED AIR HANDLERS ARE
CUSTOM MATCHED TO THE CONDENSING UNITS — The
524A Series has excellent fan performance, efficient directexpansion (DX) coils, a unique combination of indoor-air quality features, and easy installation. Its versatility and state-ofthe-art features help to ensure that your split system provides
economical performance now and in the future.
Indoor-Air Quality (IAQ) Features — The unique combination
of IAQ features in the 524A Series air handlers help to ensure
that only clean, fresh, conditioned air is delivered to the occupied space.
Direct-expansion (DX) cooling coils prevent the build-up of
humidity in the room, even during part-load conditions. Unit
sizes of 10 tons and above feature dual-circuit coils for
improved temperature control.
Standard 2-in. disposable filters remove dust and airborne particles from the occupied space for cleaner air.
Form No. PDS 569D.72.2
Thermal insulation contains an EPA-registered immobilized
anti-microbial agent to inhibit the growth of bacteria and fungi.
The pitched, non-corroding drain pan can be adjusted for a
right- or left-hand connection to suit many applications and
provide positive drainage and to prevent standing condensate.
The 524A accessory economizer can provide ventilation air to
improve indoor air quality by using demand control ventilation.
When used in conjunction with a 2 to 10 VDC adapter on the
actuator and a CO
sensor, the economizer admits fresh
2
outdoor air to replace stale, recirculated indoor air as needed.
Economy — The 524A Series packaged air handlers have low
initial costs, and they continue to save money by providing
reduced installation expense and energy-efficient performance.
Quick installation is ensured by the multipoise design. Units can
be installed in either the horizontal or vertical configuration without modifications. Fan motors and contactors are prewired and
thermostatic expansion valves (TXVs) are factory-installed on
all 524A direct-expansion models.
High efficiency, precision-balanced fans minimize air turbulence, surging, and unbalanced operation, cutting operation
expenses.
The economizer accessory precisely controls the blend of outdoor air and room air to achieve comfort levels. When the
outside air enthalpy is suitable, outside air dampers can fully
open to provide “free” cooling without energizing mechanical
cooling.
Rugged Dependability — The 524A series units are made to
last. The die-formed galvanized steel panels ensure structural
integrity under all operating conditions. Galvanized steel fan
housings are securely mounted to a die-formed galvanized
steel fan deck.
Rugged pillow-block bearings (524A150-300) are securely fastened to the solid steel fan shaft with split collets and clamp
locking devices. Smaller unit sizes have spider-type bearings.
Coil Flexibility — Model 524A direct-expansion coils have galvanized steel casings; inlet and outlet connections are on the
same end. The coils are designed for use with Refrigerant 22
3
and have
/8-in. diameter copper tubes mechanically bonded to
aluminum sine-wave fins. The coils include matched, factoryinstalled thermostatic expansion valves (TXVs) with matching
distributor nozzles.
Easier Installation and Service — Themultipoisedesignand
component layout help you to get the unit installed and running
quickly. Units can be converted from horizontal to vertical operation by simply repositioning the unit. Drain pan connections
are duplicated on both sides of the unit. The filters, motor, drive,
TXVs, and coil connections are all easily accessed by removing
a single side panel.
NOTE: Since this data is calculated, these sound power levels may be different than the actual
sound power levels. The accoustic center of the unit is located at geometric center of the unit.
coil protection to site conditions for optimum durability. See
table below. Consult your Bryant representative for further
information.
E-Coated Aluminum-Fin Coils have a flexible and durable
epoxy coating uniformly applied to all coil surfaces. Unlike brittle
phenolic dip and bake coatings, E-coating provides superior
protection with unmatched flexibility, edge coverage, metal
adhesion, thermal performance, and most importantly, corrosion resistance.
E-coated coils provide this protection since all coil surfaces are
completely encapsulated from environmental contamination.
This coating is especially suitable in industrial environments.
Pre-Coated Fin Coils provide protection in mild coastal
environments.
–20 F Low-Ambient Temperature Kit Option (Motormaster®)
(566E, 569D, 569F, 576C Only) controls outdoor-fan motor
operation to maintain the correct head pressure at low outdoor
ambient temperatures.
115-v Convenience Outlet (566E, 569D, 569F, 576C Only) to
power up electric drills, lights, and refrigerant recovery
machines. This means you are no longer required to run a separate 115-v power supply.
Condenser Coils offer several options to match
Non-Fused Disconnect Switch (566E, 569D, 569F, 576C
Only) to remove power locally at the condensing unit. This
switch also includes a power lockout capability to protect the
service person. This lockout switch saves the service person
time and effort because there is no need to access a distant disconnect switch while servicing the unit.
FIELD-INSTALLED ACCESSORIES
Electric Unloader Package (576C120 Only) includes hard-
ware and solenoid valve to convert a pressure-operated
unloader to electric unloading.
–20 F Low-Ambient Temperature Accessory Kit (Motormaster) controls outdoor-fan motor operation to maintain the correct
head pressure at low outdoor ambient temperatures.
Condenser Coil Grille Package protects condensing unit coil
from impact by large objects and vandalism.
Bryant’s Line of Thermostats provide both programmable and
non-programmable capability with the new Debonair®lineof
commercial programmable thermostats. The CommercialElectronic thermostats provide 7-day programmable capability
for economical applications.
Hail Guard Package protects against damage from flying
debris and hail.
Gage Panel Package provides a suction and discharge pressure gage for the refrigerant circuit.
Al — Aluminum
FACTORY-INSTALLED
DURA-SHIELD
COIL PROTECTION
CONDENSER COIL OPTIONS
COPPER-TUBE COILS
DURA-SHIELD
WITH
OPTION
Al Fins (Standard Coils)X
Al Fins, E-CoatedX
Al Fins, Pre-CoatedX
LEGEND
LOW AMBIENT CONTROL
(FACTORY-INSTALLED OR
FIELD-INSTALLED)
Standard
ENVIRONMENT
Mild
Coastal
Industrial/
Coastal
FACTORY-INSTALLED
CONVENIENCE OUTLET
Options and Accessories
4
FACTORY-INSTALLED
DISCONNECT SWITCH
OPTIONS AND ACCESSORIES (cont)
524A-B, C FACTORY-INSTALLED OPTIONS
Alternate Fan Motors and Drives are available to provide the
widest possible range of performance.
High-Capacity 4-Row Coils are available to provide increased
latent and sensible capacities (524A-C).
Prepainted Steel Units are available from the factory for appli-
cations that require painted units. Units are painted with AmericanSterlingGraycolor.
FIELD-INSTALLED ACCESSORIES
Two-Row Hot Water Coils have copper tubes mechanically
bonded to aluminum plate fins and non-ferrous headers.
One-Row Steam Coil has copper tubes and aluminum fins.
The Inner Distributing Tube (IDT) design provides uniform
temperatures across the coil face. The steam coil has a broad
operating pressure range; up to 20 psig (138 kPag) at 260 F
(127 C). The IDT steam coils are especially suited to applications where sub-freezing air enters the unit.
Electric Resistance Heat Coils have an open-wire design and
are mounted in a rigid frame. Safety cutouts for high temperature conditions are standard. Terminal block for single-point
power connection is included.
Economizer (Enthalpy Controlled) provides ventilation air
and “free” cooling if outside ambient temperature and humidity
are suitable.
Discharge Plenum directs the air discharge directly into the
occupied space integral horizontal and vertical louvers enable
redirection of airflow. Accessory is available unpainted or
painted. Field assembly required.
Return-Air Grille provides a protective barrier over the returnair opening and gives a finished appearance to units installed in
the occupied space. Accessory is available unpainted or
painted.
Subbase provides a stable, raised platform and room for condensate drain trap connection for vertical floor-mounted units.
Accessory is available unpainted or painted.
Overhead Suspension Package includes necessary brackets
to support units in horizontal ceiling installations.
Bryant’s Line of Thermostats provide both programmable and
non-programmable capability. The Commercial Electronic
thermostats provide 7-day programmable capability for economical applications.
Condensate Drain Trap includes an overflow shutoff switch
that can be wired to turn off the unit if the trap becomes
plugged. Kit also includes a wire harness that can be connected
to an alarm if desired. The transparent trap is designed for easy
service and maintenance.
UV-C Germicidal Lamps kill mold and fungus, which may grow
on evaporator coil and condensate pan surfaces. The use of
UV-C germicidal lamps eliminates the foul odors that result from
this growth of mold and fungus. It also provides a self-cleaning
function for the evaporator coil and drain pan.
Commercial Programmable
and Non-Programmable Thermostat
5
DISCHARGE
PLENUM
RETURN-AIR
GRILLE
OPTIONS AND ACCESSORIES (cont)
HOT WATER OR
STEAM COIL
SUBBASE
ECONOMIZER
524A with Discharge Plenum,
Return Grille, and Subbase
FAN
COIL
UNIT
FAN COIL
UNIT
524A with Hot Water or Steam Coil
524A with Economizer
FAN COIL UNIT
524A with Condensate Trap
6
SELECTION PROCEDURE
To determine combination ratings for 569D/F, 576C and 566D/E
units matched with 524A Series air handlers, follow these steps:
I DETERMINE COOLING LOAD, EVAPORATOR-AIR
TEMPERATURE, AND QUANTITY.
Given:
Total Cooling Capacity
Required(TC)...................... 127,000Btuh
Sensible Heat Capacity
Required(SHC)..................... 95,000Btuh
CompressorType ...........................Scroll
Temperature Air Entering Condenser (Edb). . . . . . . . 95 F
For this example, select a 569D120 matched with a
524A-C120 with high-capacity 4-row coil This 569D120/
524A-C120 condensing unit air-handler combination
provides 130,000 Btuh of total cooling capacity and
98,200 Btuh of sensible capacity at the given conditions. If
other temperatures or airflow values are required, interpolate the values from the combination ratings.
III DETERMINE SIZES OF LIQUID AND SUCTION LINES.
Enter Refrigerant Piping Sizes table. The sizes shown are
based on an equivalent length of pipe. This equivalent
length is equal to the linear length of pipe indicated at the
top of each sizing column, plus a 50% allowance for fitting
losses. (For a more accurate determination of actual
equivalent length in place of using the estimated 50%
value, refer to a standard refrigeration piping practice.) For
this example, note in the linear length column that the
1
proper pipe size is
/2in. for the liquid line and 13/8in. for
the suction line.
IV DETERMINEFANRPMANDBHP(BRAKE
HORSEPOWER).
At the Air Handler Fan Performance table enter at 524AC120 with high capacity coil at 4000 cfm and move to the
External Static Pressure (ESP) column. Note that the conditions require 803 rpm at 1.77 bhp.
V DETERMINE MOTOR AND DRIVE.
Enter the Fan Motor Data tables and find the standard
motor for 524A-C120 unit rated at 2.4 Hp. Since the bhp
required is 1.77, a standard motor satisfies the requirement and should be used.
Next, find the type of drive that satisfies the 803 rpm
requirement in the Drive Data tables. For the 524A-C120
unit, the Standard Drive table on shows an rpm range of
666-863. Since the rpm required is 803, the standard drive
satisfies the requirement and should be used. Select the
standard motor and standard drive combination (option
code GC or ED).
7
CONTROLS
OPERATING SEQUENCES
569D072-120, 576C120 — At start-up, the thermostat calls for
cooling. With all safety devices satisfied, the compressor
contactor and fan contactor energize, causing the compressor
and outdoor-fan motor to operate. Thermostat contacts
energize, allowing the field-supplied and field-installed indoorfan contactor to function. A field-supplied and field-installed liquid line valve also opens, allowing the system to function in
Cooling mode. As cooling demand is satisfied, the thermostat
contacts break, deenergizing the contactor and causing the
system to shut off. The liquid line solenoid valve closes, minimizing the potential for refrigerant migration. The compressor
does not restart until the thermostat again calls for cooling. The
system is protected with a safety circuit so that the system will
not start if a fault exists (i.e., high or low pressure fault). To reset
the safety circuit, set the thermostat to eliminate the cooling
demand, then return to original set point. This should be done
only once, and if system shuts down due to the same fault,
determine the problem before attempting to restart the system.
566D150-240 — When the first stage of cooling thermostat
closes, the timer starts. After approximately 3 seconds, the
timer activates the compressor and fan motor no. 1 contactors.
When the liquid pressure builds to approximately 257 psig, fan
motor no. 2 is energized.
When there is demand for additional cooling capacity, the
second stage of the cooling thermostat closes, energizing a
field-supplied liquid line solenoid (LLS) valve, which opens. This
increases the suction pressure, causing the compressor to
operate at higher capacity (compressor loads).
When the fan switch is set at AUTO, the indoor-air fan cycles
with the compressor. When the switch is set at CONT, the
indoor-air fan runs continuously.
At shutdown, the Time Guard II timer prevents the compressor
from restarting for approximately 5 minutes.
In addition, an LLS valve wired in parallel with the compressor
contactor coil shuts off the liquid line to prevent refrigerant
migration back to the compressor during the off cycle.
569F120 — When the thermostat calls for stage one cooling at
start-up, and all safety devices are satisfied, the compressor
contactor no. 1 (C1) energizes causing compressor no. 1 and
outdoor-fan motor no. 1 to start (the indoor-fan contactor should
be wired to start at the same time as the compressor). The
liquid line solenoid (LLS) valve will open when compressor no. 1
starts, allowing refrigerant to flow in the system.
When the thermostat calls for stage two cooling, compressor
contactor no. 2 (C2) energizes causing compressor no. 2 and
outdoor-fan motor no. 2 to start. As the cooling demand
decreases, stage two on the thermostat opens, causing
compressor no. 2 and outdoor-fan motor no. 2 to shut down. As
the cooling continues to decrease, stage one of the thermostat
opens causing compressor no. 1 and outdoor-fan motor no. 1 to
shut down. The LLS valve for each compressor will close when
the associated compressor stops, minimizing the potential for
refrigerant migration during the off cycle.
The indoor-fan motor will stop if the thermostat is set to AUTO
and will continue to operate if the thermostat is set to CONT.
TM
Each compressor is protected with a Cycle-LOC
device so
that the compressor will not operate if there is a high-pressure
fault, low pressure fault, or a compressor is off due to internal
line break overcurrent/overtemperature protection. To reset the
Cycle-LOC device, set the thermostat higher to remove the
cooling demand, then return to the original set point. This
should be done only once. If the system shuts down with the
same fault, the cause for the fault should be determined and
corrected before the a Cycle-LOC device is reset again.
566E150-240 — At start-up, when the thermostat calls for first
stage cooling and all safety devices are satisfied, the compressor contactor (C1) energizes causing compressor no. 1 and fan
motor no. 1 to start. Fan motor no. 2 will start when the fan
cycling pressure switch (FCPS) closes as discharge pressure
builds (refer to physical data table for FCPS specifications).
With the indoor-fan contactor wired to TB2-4 and TB2-9
contacts on the terminal block, the indoor fan will also start with
the compressor. The liquid line solenoid (LLS) valve will open
when compressor no. 1 starts, allowing refrigerant to flow in the
system.
When the thermostat calls for stage two cooling, compressor
contactor no. 2 (C2) energizes causing compressor no. 2 to
start. As the cooling demand decreases, stage two on the
thermostat opens, causing compressor no. 2 to shut down. As
the cooling continues to decrease, stage one of the thermostat
opens causing compressor no. 1 and outdoor-fan motor to shut
down. The LLS valve for each compressor will close when the
associated compressor stops, minimizing the potential for
refrigerant migration during the off cycle.
The indoor-fan motor will stop if the thermostat is set to AUTO
and will continue to operate if the thermostat is set on CONT.
Each compressor is controlled by the thermostat so they will not
start until there is a demand from the thermostat. Each
compressor is protected with a Cycle-LOC device so that the
compressor will not operate if there is a high-pressure fault,
low-pressure fault, or compressor is off due to internal line
break overcurrent/overtemperature protection. To reset the a
Cycle-LOC device, set the thermostat higher to remove the
cooling demand, then return to the original set point. This
should be done only once. If the system shuts down with the
same fault, the cause for the fault should be determined and
corrected before the a Cycle-LOC device is reset again.
8
NOTES:
1. If any of the original wire furnished must be
replaced, it must be replaced with type 90° C
wire or its equivalent.
Motor HP (rpm)
Diameter22222222
Nominal Airflow (CfmTotal)5400650065006500
1
/
8
1
/
4
1
/
4
1
/
4
Watts (Total)340570570570
CONDENSER COIL (Qty)22
Face Area (sqfttotal)29.229.229.2
Rows...Fins/in.1...172...172...172...172...17
Storage Capacity (lb)**17.334.234.234.217.1 (ea)
CONTROLS
Pressurestat Settings (psig)
High Cutout428 ± 10428 ± 10428 ± 10
Cut-in320 ± 20320 ± 20320 ± 20
Low Cutout27 ± 327 ± 327 ± 3
Cut-in44 ± 544 ± 544 ± 5
DISCHARGE GAS THERMOSTAT (°F)22
Cutout—270 ± 9———
Cut-in—190 ± 13———
PRESSURE RELIEF
LocationSuction Line
Temperature (F)200
PIPING CONNECTIONS (in. ODM)
Qty...Suction1...11/
Qty...Liquid
1...
8
3
/
8
*Unit is factory-supplied with holding charge only.
†Typical operating charge with 25 ft of interconnecting piping.
**Storage capacity of condenser coil with coil 80% full of liquid R-22 at
95 F.
1...11/
1...3/
8
8
1...13/
1...1/
8
2
1...13/
1...1/
8
2
NOTE: Unit 576C120 has one step of unloading. Full load is at 100% of
capacity, and one step of unloading is 67% capacity. Unit 576C120 has
the following unloader settings: load is 70 ± 1 psig and unload is 60 ±
2psig.
1
/
2...11/
2...3/
4
8
8
12
DIMENSIONS
569D072-120, 576C120, 569F120
50TFQ004-012
UNIT
Standard Unit Weight Corner W Corner X Corner Y Corner ZCenter of Gravity