COMMERCIAL AIR COOLED CONDENSING UNITS 576b PDS576H.240.7

User Manual: COMMERCIAL AIR COOLED CONDENSING UNITS 576b

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COMMERCIAL AIR-COOLED
CONDENSING UNITS WITH 524A
AIR-HANDLING UNITS

Models 576B, 576H
with 524A
Sizes 240-360
20 to 30 Tons

576B300-360
576H240-360

FEATURES/BENEFITS
Building owners will appreciate the high unit EERs (Energy
Efficiency Ratios) offered by the 576B and 576H units. These
units provide greater efficiency than similar units in the marketplace, which translates into year-round operating savings. Latest safety standards for 576B and 576H units are assured
through UL and UL, Canada approvals.
CONSTRUCTED FOR LONG LIFE — The 576B and 576H
units are designed and built to last. Cabinets are constructed of
pre-painted galvanized steel, delivering unparalleled protection
against the environment. Inside and outside surfaces are protected to ensure long life, good looks and reliable performance.
The copper tube-aluminum fin outdoor coil construction provides long term reliability and improved heat transfer. Where
conditions require them, copper fin coils are available. For corrosive or coastal environments an epoxy barrier is available to
provide superior coil durability.
RELIABILITY — The 576B and 576H condensing units offer
the building owner components and operating controls
designed for performance dependability. These condensing
units feature the time proven highly reliable 06D and 06E compressors. Unloading capability for superior part load performance is a standard feature of these compressors.
The compressor mounting system has vibration isolation to
provide quiet operation and reduce component stress.
Each compressor is equipped with a crankcase heater to eliminate the occurrence of liquid slugging at start-up. The compressors also include an oil level sight glass for maintenance
ease.
The following safety features are included in each unit:
• Anti short cycling control
• Low oil pressure safety
• Low refrigerant pressure safety

524A180-360

• High refrigerant pressure safety
• Calibrated circuit breakers
576H SERIES — The 576H condensing units feature 2 compressors and 2 refrigeration circuits. These units can be
matched with a single air handler or two separate air handlers.
Units are designed for constant volume control.
EASE OF INSTALLATION AND SERVICE — These units are
equipped with hinged control box access panels, control interface terminal boards, liquid line shut off valves and compressor
service valves.
INNOVATIVE BRYANT 524A AIR-HANDLING UNITS —
IDEAL MATCHES FOR 576B AND 576H CONDENSING
UNITS — The 524A Series has excellent fan performance, efficient direct-expansion (DX) coils, a unique combination of
indoor air quality features, and easy installation. Its versatility
and state-of-the-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 helps to make
sure 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. The
524A180-360 sizes feature dual-circuit coils.
Standard 2-in. disposable filters remove dust and airborne particles from the occupied space.
The pitched PVC drain pan can be adjusted for a right-hand or
left-hand connection to provide positive drainage and to prevent standing condensate.
The 524A accessory economizer can provide ventilation air to
improve indoor-air quality. When used with CO2 sensors and
field-supplied actuator adapter, the economizer admits fresh
outdoor air to replace stale, recirculated indoor air.

Form No. PDS 576H.240.7

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. All units have drain-pan connections on both
sides, and pans can be pitched for right-hand or left-hand operation with a simple adjustment. Fan motors and contactors are
prewired and thermostatic expansion valves (TXVs) are factoryinstalled on all 524A models.
High efficiency, precision-balanced fans minimize air turbulence, surging, and unbalanced operation, cutting operating
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.
Rugged Dependability — The 524A 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
deck. Mechanically bonded coil fins provide improved heat
transfer. Rugged pillow-block bearings are securely fastened to
the solid steel fan shaft with split collets and clamp locking
devices.
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
and have 3/8-in. diameter copper tubes mechanically bonded to
aluminum sine-wave fins. The coils include matched, factoryinstalled TXVs with matching distributor nozzles. Accessory hot
water and steam coils and electric heaters are also available.

Easier Installation and Service — The multipoise design and
component layout help you to get the unit installed and running
quickly. The DX coils have factory-installed TXVs with matching
distributor nozzles. 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.

TABLE OF CONTENTS
Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1, 2
Model Number Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . 3, 4
ARI Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . 9-11
Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-16
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Performance Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-28
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-32
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 33, 34
Typical Wiring Schematic . . . . . . . . . . . . . . . . . . . . . . . . . 35-38
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39, 40
Application Data — 576B300-360, 576H240-360 Units . . 41-43
Application Data — 524A180-360 Units . . . . . . . . . . . . . . 44, 45
Guide Specifications — 576B300,360 . . . . . . . . . . . . . . . 46, 47
Guide Specifications — 576H240-360 . . . . . . . . . . . . . . . 48, 49
Guide Specifications — 524A180-360 . . . . . . . . . . . . . . . 50, 51

2

MODEL NUMBER NOMENCLATURE — 576B
576B

P

X

300

000

RA

576B – Commercial Air-Cooled Condensing Units
Factory-Installed Options
Condenser Coil Protection
AA – Aluminum (Standard)
KA – Pre-Coated Aluminum (Optional)
RA – Copper (Optional)
EA – E-Coated Al Fin/Cu Tube (Optional)

Voltage Designation
E – 460-3-60
P – 208/230-3-60

Heating Capacity
000 – No Heat
Nominal Tons Cooling
300 – 25
360 – 30

Heating
X – None

Quality Assurance
Certified to ISO 9001:2000

MODEL NUMBER NOMENCLATURE — 576H
576H

E

X

240

000

AA
Factory-Installed Options
Condenser Coil Protection
AA — Aluminum (Standard)
KA — Pre-Coated Aluminum (Optional)
RA — Copper (Optional)
EA — E-Coated Al Fin/Cu Tube (Optional)

576H — Commercial Air-Cooled
Condensing Unit (Dual-Circuit)
Voltage Designation
E — 460-3-60
P — 208/230-3-60
Heating
X — None
Nominal Tons
240 — 20
300 — 25
360 — 30

Heating Capacity
000 — No Heating

LEGEND
Al — Aluminum
Cu — Copper

Quality Assurance
Certified to ISO 9001:2000

3

MODEL NUMBER NOMENCLATURE — 524A
524A P B 240 000 GC
GC — Unpainted, Standard Motor
and Standard Drive

524A — Fan Coil

HC — Unpainted, Standard Motor and
Medium-Static Drive
(not available for 300 size)

Voltage
T — 575-3-60
P — 208/230-3-60
E — 460-3-60*

TC — Unpainted, Alternate Motor and
Medium-Static Drive (300 size only)

Coil Option
B — DX Cooling Coil with TXVs
C — DX High Capacity Cooling with TXVs

YC — Unpainted, Alternate Motor and
High-Static Drive†
ED — Painted, Standard Motor and
Standard Drive

Nominal Cooling (Tons)
180 — 15
240 — 20
300 — 25
360 — 30

FD — Painted, Standard Motor and
Medium-Static Drive
(not available for 300 size)
RD — Painted, Alternate Motor and
Medium-Static Drive (300 size only)
WD — Painted, Alternate Motor and
High-Static Drive†

Nominal Heating (Btuh)
(Not applicable to 524A-B)
000 — 524A-B units

Quality Assurance

DX
—
TXV —

Certified to ISO 9001:2000

LEGEND
Direct Expansion
Thermostatic Expansion Valve

*Size 524A180 units with an “E” voltage designation are triple voltage
(i.e., 208-230/460-3-60), unless the alternate motor (YC or WD) option
is used.
†The YC and WD option codes for 360 size unit designate standard
motor and high-static drive.

4

ARI* CAPACITY RATINGS
CONDENSING
UNIT
576

AIR
HANDLER/
INDOOR COIL
524A-C240
524A-C300
524A-C360
524A-C300
524A-C360
524A-C180
524A-C240
524A-C300
524A-C240
524A-C300
524A-C360
524A-C300
524A-C360

576B300
576B360
576H240

576H300
576H360

SYSTEM†
Net Capacity
(Btuh)
282,000
300,000
316,000
332,000
345,000
222,000
240,000
250,000
268,000
282,000
290,000
324,000
332,000

LEGEND
EER — Energy Efficiency Ratio
IPLV — Integrated Part Load Value
SST — Saturated Suction Temperature

EER

IPLV

8.8
9.0
8.9
8.6
8.8
9.8††
9.6††
10.2††
9.4***
9.6***
9.4
9.4
9.5

11.0
11.2
11.0
10.6
10.6
9.4
9.7††
10.3††
9.5***
9.5***
9.3
9.2
8.9

CONDENSING UNIT ONLY**
Capacity
EER
IPLV
(Btuh)
330,000

10.2

12.1

370,000

10.1

13.1

250,000

11.7

13.7

290,000

11.2

12.9

344,000

11.1

12.9

*Air Conditioning and Refrigeration Institute.
†Ratings in accordance with ARI Standard 360/365.
**Condensing unit only ratings are at 45 F SST and 95 F entering-air
temperature.
††System ratings meet or exceed ASHRAE 90.1-1999 efficiency
requirements.
***Ratings meet or exceed ASHRAE 90.1-1999 efficiency requirements
for systems with a heating section other than electric resistance heat.

SOUND LEVELS, dB — 576B AND 576H
UNIT
576B300
576B360
576H240
576H300
576H360

63
95
96
95
95
96

125
95
96
95
95
96

250
93
94
93
93
94

OCTAVE BAND
1000
2000
89
84
90
85
89
84
89
84
90
85

500
90
91
90
90
91

NOTES:
1. Estimated sound power levels, dB re 1 Picowatt.
2. This data is based upon a limited amount of actual testing with the
estimated sound power data being generated from this data in
accordance with ARI standard 370 for large outdoor refrigerating
and air-conditioning equipment.

4000
82
83
82
82
83

8000
81
83
81
81
83

dBA
93.5
94.6
93.5
93.5
94.6

3. Since this data is estimated, the sound power levels should not be
guaranteed or certified as being the actual sound power levels.
4. The acoustic center of the unit is located at the geometric center of
the unit.

ESTIMATED SOUND POWER LEVELS (Lw) — 524A180-360
UNIT
524A180
524A240
524A300
524A360

Cfm
6,000
8,000
10,000
12,000

dB(A)
92.7
96.4
96.2
98.5

63
98.9
102.6
102.5
104.7

OCTAVE BAND CENTER FREQUENCY
125
250
500
94.9
90.9
91.9
98.6
94.6
95.6
98.5
94.5
95.5
100.7
96.7
97.7

1000
85.9
89.6
89.5
91.7

NOTE: Since this data is calculated, these sound power levels may be different than the actual sound power levels.
The acoustic center of the unit is located at the geometric center of the unit.

5

2000
83.9
87.6
87.5
89.7

4000
79.9
83.6
83.5
85.7

PHYSICAL DATA
576B300,360 UNITS
UNIT 576B
NOMINAL CAPACITY (tons)
OPERATING WEIGHTS (lb)
With Aluminum-Fin Coils (standard)
With Copper-Fin Coils (optional)
REFRIGERANT*
Operating Charge, Typical (lb)†
Shipping Charge (lb)
COMPRESSOR
Qty...Model
Oil Charge (pt)
No. Cylinders
Speed (rpm)
Capacity Steps (%)
Unloader Setting (psig)
Unloader No. 1 Load
Unload
Unloader No. 2 Load
Unload
Crankcase Heater Watts
CONDENSER FANS
Qty...Rpm
Diameter (in.)
Nominal Hp
Nominal Airflow (cfm total)
Watts (total)
CONDENSER COIL
Rows...Fins/in.
Face Area (sq ft)
Storage Capacity (lb)**
CONTROLS
Pressurestat (psig)
High-Pressure
Open
Close
Low-Pressure
Open
Close
Oil Pressure (psi)
Open
Close
FAN CYCLING CONTROLS
Operating Pressure (psig)
No. 2 Fan, Close
Open
PRESSURE RELIEF
Location
Temperature (F)
PIPING CONNECTIONS (in. ODM)
Suction
Liquid
Hot Gas Stub

300
25

360
30

1650
1804

1803
2009

R-22
30.5
43.5
3
4
Reciprocating, Semi-Hermetic
1...06E9265
1...06E9275
20
20
6
6
1750
100, 66, 33
76
58
78
60
180
Propeller Type — Direct Drive
2...1140
30
1.0
15,700
1490
1750
Enhanced Copper Tubes, Lanced Aluminum Fins
2...19
3...17
39.2
39.2
37.7
56.6

426 ± 7
320 ± 20
27 ± 3
44 ± 5
6.0
9.0

255 ± 10
160 ± 10
Fusible Plug
Liquid and Suction Line
210
15 / 8

21 / 8
7/
8
5/ 8

*Unit is factory-supplied with holding charge only.
†Typical operating charge with 25 ft of interconnected piping. Operating charge is approximate for maximum system capacity.
**Storage capacity is 80% full at liquid saturated temperature of 125 F.

6

PHYSICAL DATA (cont)
576H240-360 UNITS
UNIT 576H
NOMINAL CAPACITY (tons)*
OPERATING WEIGHT (lb)
With Aluminum-Fin Coil (standard)
With Copper-Fin Coil (optional)
REFRIGERANT, TYPE
Operating Charge, Typical (lb)†
Shipping Charge (lb)
COMPRESSOR
Qty...Model
No. Cylinders (per circuit)
Speed (rpm)
Oil Charge Per Circuit (pt)
Capacity Steps (%)
Unloader Setting (psig)
Load
Unload
CONDENSER FANS
Qty...Rpm
Diameter (in.)
Nominal Hp
Nominal Airflow (cfm)
Watts (total)
CONDENSER COIL
Rows...Fins/in.
Face Area (sq ft)
Storage Cap. (lb)**
CONTROLS
Pressurestat (psig)
High Pressure
Open
Close
Low Pressure
Open
Close
Oil Pressure (psi)
Open
Close
FAN CYCLING CONTROLS
No. 2 Fan:
Temp Close (F)
Temp Open (F)
PRESSURE RELIEF
Location
Temperature (F)
PIPING CONNECTIONS (in. ODM)
Suction
Liquid
Hot Gas Bypass

240
Ckt 1

20
3

300
Ckt 2

Ckt 1

360
Ckt 2

Ckt 1

Ckt 2

20

25

30

1760
1923

1820
1982
R-22

1880
2097

20
3

20
20
25
25
3
3
3
3
Reciprocating Semi-Hermetic
1...06DH824
1...06DA824
1...06DH328
1...06DA328
1...06DH328
1...06DA537
6
6
6
6
6
6
1750
1750
1750
1750
1750
1750
10
67
—
67
—
67
—
Factory Installed
76
—
76
—
76
—
58
—
58
—
58
—
Propeller Type — Direct Driven
2...1140
30
30
30
1.0
1.0
1.0
16,700
16,700
15,700
1550
Enhanced Copper Tubes, Lanced Aluminum Fins
2...19
2...19
3...17
39.20
39.20
39.20
37.7
37.7
56.6

426 ± 7
320 ± 20
27 ± 3
44 ± 5
6.0
9.0

70 ± 3
60 ± 3
Liquid Line, Suction Line, Compressor
210
13 / 8
5/8
5/
8

*Standard unit — single suction pressure-actuated unloader on compressor no. 1.
†Typical operating charge with 25 ft of interconnecting piping. Operating charge is approximate for maximum system capacity.
**Storage capacity is 80% full at liquid saturated temperature of 120 F.
NOTE: Refer to Loading Sequences table, page 40 for additional capacity step data.

7

PHYSICAL DATA (cont)
524A180-360 UNITS
UNIT 524A
NOMINAL CAPACITY (tons)
OPERATING WEIGHTS (lb)
Base Unit with TXV (3-Row/4-Row)
Plenum
FANS
Qty...Diam. (in.)
Nominal Airflow (cfm)
Airflow Range (cfm)
Nominal Hp (Standard Motor)
208/230-3-60 and 460-3-60
575-3-60
Speed (rpm)
208/230-3-60 and 460-3-60
575-3-60
REFRIGERANT
Operating charge (lb)
(approx per circuit)*
DIRECT-EXPANSION COIL
Max Working Pressure (psig)
Face Area (sq ft total)
No. of Splits
Split Type...Percentage
No. of Circuits per Split (3 Row/4 Row)
Fins/in.
STEAM COIL
Max Working Pressure (psig)
Face Area (sq ft total)
Rows...Fins/in.
HOT WATER COIL
Max Working Pressure (psig)
Face Area (sq ft total)
Rows...Fins/in.
Water Volume
(gal)
(ft3)
PIPING CONNECTIONS
Qty...Size (in.)
DX Coil — Suction (ODF)
DX Coil — Liquid Refrigerant (ODF)
Steam Coil, In (MPT)
Steam Coil, Out (MPT)
Hot Water Coil, In (MPT)
Hot Water Coil, Out (MPT)
Condensate (PVC)
FILTERS
Qty...Size (in.)

180
15

240
20

300
25

360
30

685/713
225

690/730
225

1020/1050
325

1030/1062
325

2...15
6000
4500-7500

2...15
8000
6000-10,000

2...18
10,000
7500-12,500

2...18
12,000
9000-15,000

3.7
3.0

5.0
5.0

7.5
7.5

10.0
10.0

1725
1725

1745
1745

1745
1755

1745
1755

2.5/2.5

3.5/3.5

4.5/4.5

5.0/5.0

R-22

17.67
2
12/16
15

Enhanced Copper Tubes; Aluminum Sine-Wave Fins
435
19.88
24.86
2
2
Face...50/50
13/18
15/20
17
15

29.83
2
18/24
15

175
13.33
1...10

13.33
1...10

13.33
2...8.5

13.33
2...8.5

15.0
1...10

15.0
1...10

15.0
2...12.5

15.0
2...12.5

150

13.9
1.85

2...11/8

14.3
1.90

2...11/8

2...13/8
2...5/8
1...21/2
1...11/2
1...2
1...2
1...11/4
Throwaway — Factory Supplied

4...16 x 20 x 2
4...16 x 24 x 2

Access Location

4...16 x 24 x 2
4...20 x 25 x 2
Either Side

LEGEND
DX — Direct Expansion
TXV — Thermostatic Expansion Valve
*Units are shipped without refrigerant charge.

8

2...13/8

OPTIONS AND ACCESSORIES
576B/576H FACTORY-INSTALLED OPTIONS
Dura-Shield Condenser Options are available to match coil
protection to site conditions for optimum durability. See table
below and refer to the Application Data for selection guidance.
Consult your Bryant representative for further information.
576B/576H FIELD-INSTALLED ACCESSORIES
Electric Unloader Package includes hardware and solenoid
valve to convert a pressure-operated unloader to electric
unloading.
Pressure Unloader Package includes the unloader valve and
hardware.
–20 F Low-Ambient Temperature Kit (Motormaster®) controls outdoor-fan motor operation to maintain the correct head
pressure at low outdoor ambient temperatures. Only one low
ambient temperature kit is required per unit.
Hot-Gas Bypass Kit (576B only) prevents the indoor coil from
freezing up during low airflow or low return-air temperature
applications by maintaining minimum suction pressure.

Bryant Thermostats provide both programmable and nonprogrammable capability.
Part-Winding-Start Timing Relay (576B) reduces inrush current and locked rotor amps on start-up. This accessory may
require a special-order unit. See table below.
PART-WINDING-START TABLE
UNIT SIZE
576B
300
360

VOLTAGE (60 Hz)
208/230
460
Note 1

Note 2

NOTES:
1. Can be field modified to part winding start by adding a time delay
relay (part no. HN67ZA001).
2. Requires special order to change circuit breakers and contactors,
and cannot use triple-voltage compressor.

CONDENSER COIL OPTIONS
COPPER-TUBE COILS
WITH DURA-SHIELD
OPTION
Al Fins (Standard Coils)
Cu Fins
Al Fins, E-Coating
Al Fins, Pre-Coated
Al
Cu
Dura-Shield
E-Coated
Pre-Coated

—
—
—
—
—

Standard

Mild
Coastal

ENVIRONMENT
Moderate
Severe
Coastal
Coastal

Industrial

Combined
Industrial/Coastal

X

X

X
X
X
X

LEGEND
Aluminum
Copper
Family of Coil Protection Options
Epoxy Coating Applied to Entire Coil Assembly
Epoxy Coating Applied to Fin Stock Material

9

OPTIONS AND ACCESSORIES (cont)
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 connection for floor-mounted units. Accessory is
available unpainted or painted.
Overhead Suspension Package includes necessary brackets
to support units in horizontal ceiling installations.
Bryant Thermostats provide both programmable and nonprogrammable capability.
CO2 Sensors can be used in conjunction with the economizer
accessory to help meet indoor air quality requirements. The
sensor signals the economizer to open when the CO2 level in
the space exceeds the set point.
Condensate Drain Trap includes an overflow shutoff switch
that can be wired to turn off the unit if the trap becomes
plugged. The 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.

524A FACTORY-INSTALLED OPTIONS
Prepainted Steel Units are available from the factory for applications that require painted units. Units are painted with American Sterling Gray color.
High Capacity 4-Row Coils are available to provide increased
latent/sensible capacities and efficiencies.
Alternate Fan Motors and Drives are available to provide the
widest possible range of performance.
524A FIELD-INSTALLED ACCESSORIES
Discharge Plenum directs the air discharge into the occupied
space; integral horizontal and vertical louvers enable redirection
of airflow. Accessory is available unpainted or painted.
Two-Row Hot Water Coils have 5/8-in. diameter copper tubes
mechanically bonded to aluminum plate fins. Coils have nonferrous headers.
One-Row Steam Coil has 1-in. OD copper tube 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 at 260 F. 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.
Economizer (Enthalpy Controlled) provides ventilation air
and “free” cooling if outside ambient temperature and humidity
are suitable. Can also be used with field-supplied CO2 sensor
and actuator adapter to help meet indoor air quality requirements.

Programmable and Non-Programmable Thermostat

10

OPTIONS AND ACCESSORIES (cont)
HOT WATER OR
STEAM COIL

DISCHARGE
PLENUM

RETURN-AIR
GRILLE

SUBBASE

FAN COIL
UNIT

FAN
COIL
UNIT

524A with Discharge Plenum,
Return-Air Grille and Subbase

524A with Hot Water or Steam Coil

ECONOMIZER

UV-C GERMICIDAL LAMPS

524A with Economizer and UV-C Germicidal Lamps

524A with Condensate Drain Trap

11

DIMENSIONS

NOTES:
1. There must be 4 ft [1220 mm] for service and for
unrestricted airflow on all sides of unit.
2. There must be minimum 8 ft [2440 mm] clear air
space above unit.
3. The approximate operating weight of the unit is:
UNIT
576B
300
300RA
360
360RA

WEIGHT
(lb)
1650
1804
1803
2009

WEIGHT
(kg)
748
818
818
911

NOTE: “RA” in model number indicates unit has
optional factory-installed copper-fin coil.

APPROX. OPER. WT (lb)
AT SUPPORT POINTS*
UNIT
576B
300
360

1

2

3

4

TOTAL

418
459

626
673

242
272

364
399

1650
1803

*Standard copper tube aluminum-fin coil.

576B300,360

12

DIMENSIONS (cont)

NOTES:
1. There must be 4 ft [1220 mm] for service and for unrestricted airflow on
all sides of unit.
2. There must be minimum 8 ft [2440 mm] clear air space above unit.
3. “RA” in the model number indicates copper coils.
4. Dimensions in [ ] are in millimeters.
5. The approximate operating weight of the unit is shown below.
6. Certified dimensional drawing is available on request.
CORNER WEIGHT — lb [kg]
UNIT
576H

240
240RA
300
300RA
360
360RA

“1”

“2”

“3”

“4”

631.6
[286.5]
666.5
[302.3]
658.7
[298.8]
693.0
[314.3]
667.0
[302.5]
718.3
[325.8]

577.6
[262.0]
609.5
[276.5]
602.4
[273.3]
633.8
[287.5]
610.0
[276.7]
656.8
[297.9]

263.1
[119.3]
309.0
[140.2]
267.0
[121.1]
313.0
[142.0]
288.0
[130.7]
344.8
[156.4]

287.7
[130.5]
337.9
[153.3]
291.9
[132.4]
342.2
[155.2]
315.0
[142.9]
377.0
[171.0]

CENTER OF
GRAVITY
A Dim.
in.
[mm]
40.00
[1016]
43.00
[1092]
39.25
[997]
42.25
[1073]
41.00
[1041]
44.00
[1117]

B Dim.
in.
[mm]

32.75
[832]

TOTAL
UNIT WT
lb [kg]
1760
[798.3]
1923
[872.3]
1820
[825.6]
1982
[899.0]
1880
[853.0]
2097
[951.2]

576H240-360

13

DIMENSIONS (cont)

LEGEND
TXV — Thermostatic Expansion Valve
NOTES:
1. Dimensions in [
2.

] are in millimeters.

Direction of airflow.

3. Recommended clearance:
• Rear: 3″
• Front: 2′-6″
• Right Side: 2′-6″
• Left Side: 2′-6″
• Local codes or jurisdiction may prevail.
4. Liquid piping not supplied by Bryant.
5. Duct flange is factory supplied and field
installed.

180
240
180

UNIT
WEIGHT
(lb)
685
690
713

240

730

UNIT
524A
STANDARD
3-ROW COIL
HIGHCAPACITY
4-ROW COIL

524A180,240

14

DIMENSIONS (cont)

LEGEND
TXV — Thermostatic Expansion Valve
NOTES:
1. Dimensions in [
2.

] are in millimeters.

Direction of airflow.

3. Recommended clearance:
• Rear: 3″
• Front: 2′-6″
• Right Side: 2′-6″
• Left Side: 2′-6″
• Local codes or jurisdiction may prevail.
4. Liquid piping not supplied by Bryant.
5. Duct flange is factory supplied and field
installed.
UNIT
524A
STANDARD
3-ROW COIL
HIGH-CAPACITY
4-ROW COIL

524A300,360

15

300
360
300
360

UNIT
WEIGHT
(lb)
1020
1030
1050
1062

DIMENSIONS (cont)
6

5

ECONOMIZER

1

4
STEAM COIL, HOT WATER COIL &
PLENUM ON TOP OF
POSITIONS 1, 2, 3, 4

FAN COIL
BASE UNIT

3

2

524A UNIT

180,240

300,360

WEIGHT

FAN COIL BASE UNIT (180, 240)
Steam Coil
Hot Water Coil
Plenum
Economizer
Economizer and Steam Coil
Economizer and Water Coil
FAN COIL BASE UNIT (300, 360)
Steam Coil
Hot Water Coil
Plenum
Economizer
Economizer and Steam Coil
Economizer and Water Coil

685, 690
239
245
225
217
456
463
1020, 1030
263
314
325
306
570
620

1
188.2
60.0
61.0
72.5
42.7
102.7
103.7
249.1
66.1
78.6
102.0
61.3
127.4
139.8

2
207.2
60.0
61.0
40.0
0.0
60.0
61.0
342.5
66.1
78.6
60.6
0.0
66.1
78.6

CORNER WEIGHTS
3
4
151.4
137.6
59.5
59.5
61.6
61.6
40.0
72.5
0.0
39.6
59.5
99.1
61.6
101.2
251.3
182.8
65.6
65.6
78.2
78.2
60.6
102.0
0.0
56.4
65.6
122.0
78.2
134.6

5
—
0.0
0.0
0.0
70.1
70.1
70.1
—
0.0
0.0
0.0
98.3
98.3
98.3

6
—
0.0
0.0
0.0
65.1
65.1
65.1
—
0.0
0.0
0.0
90.5
90.5
90.5

NOTES:
1. Total weight is determined by adding fan coil base unit weight to factory-installed option weight.
2. Corner weights are based on 3-row coil units.

Corner Weights — Vertical Position 524A180-360 Units

6

5

4

3

180,240

300,360

FAN COIL
BASE UNIT

WEIGHT

FAN COIL BASE UNIT (180, 240)
Steam Coil
Hot Water Coil
Economizer
Economizer and Steam Coil
Economizer and Water Coil
FAN COIL BASE UNIT (300, 360)
Steam Coil
Hot Water Coil
Economizer
Economizer and Steam Coil
Economizer and Water Coil

7

2

1

STEAM COIL OR
HOT WATER COIL

524A UNIT

8

685, 690
239
245
217
456
463
1020, 1030
263
314
306
570
620

1
220.5
43.2
44.5
0.0
43.2
44.5
346.4
47.5
54.6
0.0
47.5
54.6

ECONOMIZER

2
174.9
0.0
0.0
42.7
42.7
42.7
245.2
0.0
0.0
61.3
61.3
61.3

CORNER WEIGHTS
3
4
5
127.8
161.1
—
0.0
43.6
75.8
0.0
44.1
78.7
39.6
0.0
0.0
39.6
43.6
75.8
39.6
44.1
78.7
179.9
254.2
—
0.0
47.9
83.7
0.0
54.8
101.9
56.4
0.0
0.0
56.4
47.9
83.7
56.4
54.8
101.9

NOTES:
1. Total weight is determined by adding fan coil base unit weight to factory-installed option weight.
2. Corner weights are based on 3-row coil units.

Corner Weights — Horizontal Position 524A180-360 Units

16

6
—
76.5
77.9
0.0
76.5
77.9
—
84.4
102.3
0.0
84.4
102.3

7
—
0.0
0.0
70.1
70.1
70.1
—
0.0
0.0
98.3
98.3
98.3

8
—
0.0
0.0
65.1
65.1
65.1
—
0.0
0.0
90.5
90.5
90.5

SELECTION PROCEDURE WITH 576H240/524A-B240 EXAMPLE
NOTE: See the Performance Data section for combination ratings for 576H240-360 units and matching 524A air handlers. If
the 576H condensing units are matched with 2 independent
524A units, cross-plot for performance ratings or contact Bryant
Application Engineering for assistance.
I DETERMINE COOLING LOAD, EVAPORATOR-AIR TEMPERATURE AND QUANTITY.
Given:
Total Cooling Capacity
Required (TC). . . . . . . . . . . . . . . . . . . . . . 235,000 Btuh
Sensible Heat Capacity
Required (SHC) . . . . . . . . . . . . . . . . . . . . 185,000 Btuh
Temperature Air Entering
Condenser (Edb) . . . . . . . . . . . . . . . . . . . . . . . . . . 95 F
Temperature Air Entering
Evaporator (db/wb). . . . . . . . . . . . . . . .80 F db, 67 F wb
Evaporator Air Quantity . . . . . . . . . . . . . . . . . . . .8000 cfm
External Static Pressure . . . . . . . . . . . . . . . . . 0.80 in. wg
Length of Interconnecting
Refrigerant Piping . . . . . . . . . . . . . . . . . . . 30 ft (Linear)
II SELECT CONDENSING UNIT AIR-HANDLER
COMBINATION.
For this example, select a 576H240 matched with a
524A-B240. (See Combination Ratings table.) This
576H240/524A-B240 condensing unit-air handler combination provides 237,200 Btuh of total cooling capacity and
188,600 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 the Refrigerant Pipe 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 this example, note in the linear length column
that the proper pipe size is 5/8 in. for the liquid lines and
13/8 in. for the suction lines.
IV DETERMINE FAN RPM AND BHP (Brake Horsepower).
In the 524A Fan Performance table, enter the 524A-B240
section at 8000 cfm and move to the External Static
Pressure (ESP) column. Note that the conditions require
876 rpm at 4.21 bhp.
V DETERMINE MOTOR AND DRIVE.
Enter the Fan Motor Data tables and find that the standard
motor for a 524A-B240 unit is rated at 5 hp. Since the bhp
required is 4.21, a standard motor satisfies the requirement and should be used.
Next, find the type of drive that satisfies the 876 rpm
requirement in the Drive Data tables. For a 524A-B240
unit, the Medium-Static Drive table shows an rpm range of
798 to 984. Since the rpm required is 876, the mediumstatic drive satisfies the requirement and should be used.
Select the standard motor and medium-static drive combination (option code HC or FD).

PERFORMANCE DATA
CONDENSING UNIT RATINGS
576B300
SST
(F)
TC
25
kW
SDT
TC
30
kW
SDT
TC
35
kW
SDT
TC
40
kW
SDT
TC
45
kW
SDT
TC
50
kW
SDT
kW
SDT
SST
TC

—
—
—
—

80
238
21.9
107
269
23.3
110
300
24.7
112
333
26.1
115
365
27.3
118
398
28.8
121

Air Temperature Entering Condenser (F)
85
95
100
105
230
213
204
196
22.2
23.2
23.7
24.1
111
120
124
129
261
242
233
224
23.6
24.8
25.4
25.9
114
123
127
131
292
271
261
252
25.0
26.4
27.0
27.6
117
125
130
134
323
301
290
279
26.4
28.0
28.7
29.3
120
128
133
137
354
330
319
307
27.8
29.5
30.3
31.1
123
131
135
140
386
361
348
336
29.3
31.2
32.0
32.9
126
134
138
142

576B360
SST
(F)
TC
25
kW
SDT
TC
30
kW
SDT
TC
35
kW
SDT
TC
40
kW
SDT
TC
45
kW
SDT
TC
50
kW
SDT

115
180
24.9
138
206
26.8
140
232
28.7
143
258
30.6
145
284
32.4
148
312
34.4
151

LEGEND
Compressor Power
Saturated Discharge Temperature at Compressor (F)
Saturated Suction Temperature (F)
Gross Cooling Capacity (1000 Btuh)

17

80
268
25.0
106
302
26.5
109
337
27.9
112
371
29.3
115
405
30.7
117
440
32.3
120

Air Temperature Entering Condenser (F)
85
95
100
105
260
241
232
223
25.1
26.2
26.6
27.0
110
119
124
128
293
273
264
254
26.6
27.9
28.4
28.9
113
122
126
131
326
305
295
284
28.1
29.6
30.2
30.8
116
125
129
133
359
337
326
314
29.6
31.3
32.1
32.8
119
128
132
136
393
369
357
345
31.1
33.0
33.9
34.7
122
130
135
139
428
402
390
377
32.7
34.8
35.7
36.6
125
133
138
142

115
205
27.7
137
234
29.8
140
263
31.9
142
292
34.0
145
321
36.1
147
351
38.2
150

PERFORMANCE DATA (cont)
CONDENSING UNIT RATINGS (cont)
576H360

576H240
SST
(F)
20
25
30
35
40
45
50

TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT

85
157
14.1
105
178
14.7
106
198
15.3
107
221
15.9
109
244
16.6
111
270
17.2
113
295
17.8
116

Air Temp Ent Condenser (F)
95
100
105
143
136
129
14.9
15.2
15.5
115
120
125
163
156
149
15.6
16.0
16.4
116
121
126
183
176
168
16.3
16.8
17.3
117
121
126
205
197
189
17.1
17.6
18.1
118
123
128
227
219
210
17.9
18.5
19.0
120
125
129
251
243
233
18.6
19.3
19.9
122
127
131
276
266
257
19.4
20.1
20.8
125
129
133

SST
(F)

115
115
16.0
135
134
17.0
135
153
18.1
135
173
19.1
137
193
20.1
138
215
21.1
140
237
22.1
142

20
25
30
35
40
45
50

kW
SDT
SST
TC

576H300
SST
(F)
20
25
30
35
40
45
50

TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT

85
187
17.1
107
209
17.9
109
231
18.7
111
256
19.5
113
282
20.3
115
310
21.1
118
338
22.0
120

Air Temp Ent Condenser (F)
95
100
105
173
167
160
18.1
18.6
19.1
116
121
126
194
187
180
19.1
19.6
20.1
118
123
127
216
208
200
20.0
20.6
21.2
120
124
129
239
231
223
20.9
21.6
22.2
122
126
131
263
254
245
21.9
22.6
23.3
124
128
133
290
280
271
22.8
23.6
24.4
126
131
135
317
306
296
23.8
24.6
25.5
129
133
138

115
147
19.9
135
166
21.1
137
185
22.2
138
206
23.4
140
228
24.6
142
252
25.9
144
275
27.1
146

18

—
—
—
—

TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT

85
223
21.2
107
249
22.2
109
276
23.1
110
307
24.2
112
336
25.3
115
369
26.3
117
402
27.4
120

Air Temp Ent Condenser (F)
95
100
105
206
199
190
22.5
23.1
23.7
117
122
127
232
224
215
23.6
24.2
24.9
118
123
128
258
249
241
24.7
25.4
26.2
119
124
129
287
277
267
25.9
26.7
27.6
121
126
130
314
305
294
27.1
28.0
28.9
123
128
132
346
335
324
28.3
29.3
30.3
126
136
135
378
366
354
29.6
30.6
31.7
128
133
137

LEGEND
Compressor Power
Saturated Discharge Temperature at Compressor (F)
Saturated Suction Temperature (F)
Gross Cooling Capacity (1000 Btuh)

115
175
24.8
137
209
26.2
137
222
27.6
138
248
29.0
140
274
30.5
141
302
32.0
144
330
33.6
146

PERFORMANCE DATA (cont)
CONDENSING UNIT RATINGS (cont)
576H240 — CIRCUIT NO. 1 OR 2*
Air Temp Ent Condenser (F)
SST
(F)
85
95
100
105
TC
78
71
68
65
20
kW
7.03
7.44
7.61
7.76
SDT
105
115
120
125
TC
89
82
78
74
25
kW
7.34
7.80
8.01
8.20
SDT
106
116
121
126
TC
99
92
88
84
30
kW
7.65
8.17
8.41
8.63
SDT
107
117
121
126
TC
111
103
99
95
35
kW
7.96
8.55
8.82
9.07
SDT
109
118
123
128
TC
122
114
109
105
40
kW
8.28
8.93
9.23
9.52
SDT
111
120
125
129
TC
135
126
121
117
45
kW
8.59
9.30
9.64
9.96
SDT
113
122
127
131
TC
148
138
133
128
50
kW
8.90
9.68
10.0
10.4
SDT
116
125
129
133
576H300 — CIRCUIT NO. 1 OR 2*
Air Temp Ent Condenser (F)
SST
(F)
85
95
100
105
TC
93
87
83
80
20
kW
8.55
9.07
9.31
9.54
SDT
107
116
121
126
TC
104
97
94
90
25
kW
8.95
9.53
9.80
10.1
SDT
109
118
123
127
TC
116
108
104
100
30
kW
9.35
9.99
10.3
10.6
SDT
111
120
124
129
TC
128
120
116
111
35
kW
9.76
10.5
10.8
11.1
SDT
113
122
126
131
TC
141
132
127
123
40
kW
10.2
10.9
11.3
11.6
SDT
115
124
128
133
TC
155
145
140
135
45
kW
10.6
11.4
11.8
12.2
SDT
118
126
131
135
TC
169
158
153
148
50
kW
11.0
11.9
12.3
12.7
SDT
120
129
133
138

kW
SDT
SST
TC

—
—
—
—

576H360 — CIRCUIT NO. 1
SST
(F)

115
58
8.01
135
67
8.52
135
77
9.03
135
87
9.54
137
97
10.0
138
108
10.6
140
119
11.1
142

20
25
30
35
40
45
50

TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT

85
93
8.69
105
105
9.02
106
117
9.34
107
131
9.70
109
144
10.1
111
159
10.4
113
174
10.8
116

Air Temp Ent Condenser (F)
95
100
105
85
82
78
9.26
9.53
9.78
115
120
125
97
93
89
9.64
9.94
10.2
116
121
125
109
105
101
10.0
10.3
10.7
116
121
126
122
117
113
10.5
10.8
11.2
118
123
127
134
130
125
10.9
11.3
11.7
120
124
129
148
143
138
11.3
11.7
12.2
122
127
131
163
157
152
11.8
12.2
12.7
124
129
133

115
71
10.2
135
81
10.8
135
92
11.3
135
104
11.8
137
116
12.4
138
128
12.9
140
141
13.5
142

Air Temp Ent Condenser (F)
95
100
105
121
117
112
13.2
13.6
13.9
118
123
128
135
131
126
14.0
14.3
14.7
120
124
129
149
144
140
14.7
15.1
15.5
122
126
131
165
160
154
15.4
15.9
16.4
124
128
133
180
175
169
16.2
16.7
17.2
126
131
135
198
192
186
17.0
17.6
18.1
129
133
138
215
209
202
17.8
18.4
19.0
132
136
140

115
104
14.6
138
117
15.4
139
130
16.3
140
144
17.2
142
158
18.1
144
174
19.1
147
189
20.1
149

576H360 — CIRCUIT NO. 2
SST
(F)

115
74
9.97
135
83
10.5
137
93
11.1
138
103
11.7
140
114
12.3
142
126
12.9
144
138
13.5
146

20
25
30
35
40
45
50

LEGEND
Compressor Power
Saturated Discharge Temperature at Compressor (F)
Saturated Suction Temperature (F)
Gross Cooling Capacity (1000 Btuh)

*Circuits no. 1 and 2 on 576H240 and 300 have identical capacities.

19

TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT
TC
kW
SDT

85
130
12.5
109
144
13.2
111
159
13.8
113
176
14.5
115
192
15.2
118
210
15.9
120
228
16.6
123

PERFORMANCE DATA (cont)
COMBINATION RATINGS
576B300/524A-C240 WITH HIGH-CAPACITY 4-ROW COIL
Evaporator Air — Cfm
Temp (F)
6000
8000
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
TC
341.7 312.2 284.6 364.1 333.8 304.9 377.8
85 SHC 133.1 175.5 216.7 149.5 203.1 255.5 164.0
kW
28.00 26.64 25.34 29.05 27.67 26.34 29.67
TC
327.7 299.3 272.7 347.9 318.9 291.2 360.7
95 SHC 128.9 170.8 211.9 144.6 198.3 250.0 159.7
kW
29.94 28.46 27.02 31.03 29.51 28.04 31.68
TC
320.6 292.8 266.6 339.7 311.4 284.4 352.3
100 SHC 126.7 168.7 209.4 142.6 196.0 247.7 157.7
kW
30.92 29.38 27.88 32.01 30.43 28.91 32.71
TC
313.3 286.0 260.4 331.5 303.9 277.5 343.6
105 SHC 124.6 166.3 207.0 140.4 193.6 245.1 155.5
kW
31.91 30.29 28.72 33.00 31.37 29.78 33.73
TC
298.4 272.2 247.5 315.0 288.7 267.1 326.2
115 SHC 120.2 161.6 202.0 136.1 189.0 240.9 151.4
kW
33.79 32.01 30.30 34.90 331.6 31.22 35.66
576B300/524A-C300 WITH HIGH-CAPACITY 4-ROW COIL
Evaporator Air — Cfm
Temp (F)
7500
10,000
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
TC
348.1 319.4 292.1 365.9 336.7 309.1 377.1
85 SHC 175.1 191.4 240.3 159.4 222.4 283.2 176.6
kW
28.21 26.89 25.61 29.06 27.71 26.42 29.55
TC
333.1 305.7 282.5 349.1 321.3 294.5 359.6
95 SHC 137.2 187.0 236.4 155.2 217.9 277.2 172.5
kW
30.13 28.70 27.14 30.98 29.52 28.10 31.52
TC
325.6 298.6 272.9 340.7 313.8 287.7 350.8
100 SHC 135.2 184.7 233.1 153.1 215.6 274.5 170.5
kW
31.11 29.61 28.12 31.95 30.47 28.97 32.52
TC
318.0 291.4 266.0 332.3 305.8 281.0 342.1
105 SHC 133.2 182.4 230.4 151.1 213.4 271.3 168.5
kW
32.10 30.50 28.94 32.94 31.37 29.86 33.53
TC
301.6 276.8 252.8 315.2 290.1 266.4 324.3
115 SHC 128.6 177.8 225.3 147.0 209.0 266.4 164.5
kW
33.93 32.22 30.56 34.83 33.14 31.51 35.45
576B300/524A-C360 WITH HIGH-CAPACITY 4-ROW COIL
Evaporator Air — Cfm
Temp (F)
9000
12,000
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
TC
371.5 341.2 312.3 387.9 357.4 328.9 398.8
85 SHC 156.7 216.0 273.5 178.5 253.1 320.9 199.3
kW
29.39 28.01 26.68 30.14 28.78 27.45 30.66
TC
354.9 325.8 298.2 370.2 341.0 314.4 380.1
95 SHC 152.3 211.2 268.2 174.3 248.5 314.4 195.2
kW
31.39 29.87 28.42 32.18 30.69 29.27 32.69
TC
346.6 318.1 291.3 361.3 332.5 306.7 370.6
100 SHC 150.2 208.9 265.5 172.3 246.2 306.7 193.1
kW
32.39 30.82 29.31 33.23 31.64 30.17 33.72
TC
338.1 310.4 283.7 352.2 324.0 300.6 361.0
105 SHC 148.1 206.7 262.0 170.2 243.8 300.6 190.8
kW
33.40 31.76 30.17 34.24 32.58 31.16 34.75
TC
321.1 294.7 269.6 333.7 306.8 287.6 341.8
115 SHC 143.7 201.8 256.8 165.9 238.8 287.6 186.7
kW
35.31 33.57 31.85 36.14 34.37 33.07 36.69

62
318.6
290.8
26.97
303.8
284.9
28.73
296.9
282.1
29.64
289.8
278.9
30.54
274.4
274.4
32.16

576B300/524A-B240 WITH STANDARD 3-ROW COIL
Evaporator Air — Cfm
Temp (F)
6000
8000
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
TC
305.1 279.8
—
320.3 295.8
—
330.3
85 SHC 150.5 184.8
—
167.6 213.3
—
183.0
kW
25.59 24.45
—
26.28 25.17
—
26.73
TC
292.8 268.8
—
306.8 283.5 257.9 315.7
95 SHC 145.8 180.3
—
162.7 208.1 257.9 177.8
kW
27.58 26.34
—
28.30 27.09 25.77 28.76
TC
286.3 262.5 237.6 300.0 276.8 252.2 308.6
100 SHC 143.3 177.7 227.0 160.3 205.3 252.2 175.3
kW
28.50 27.18 25.81 29.25 27.97 26.61 29.72
TC
279.8 256.7 232.8 292.9 270.3 247.1 300.9
105 SHC 140.8 175.3 222.8 157.7 202.5 247.1 172.6
kW
29.35 27.86 26.33 30.19 28.74 27.25 30.71
TC
266.8 245.0 223.2 278.7 257.4 236.9 285.7
115 SHC 135.9 170.5 214.4 152.6 197.1 236.9 167.3
kW
31.21 29.70 28.19 32.03 30.56 29.14 32.52

62
320.4
320.4
26.94
307.1
307.1
28.78
301.0
301.0
29.75
294.3
294.3
30.66
281.4
281.4
32.52

576B300/524A-B300 WITH STANDARD 3-ROW COIL
Evaporator Air — Cfm
Temp (F)
7500
10,000
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
TC
330.8 305.4 277.1 344.8 318.8 293.3 353.4
85 SHC 168.9 212.4 270.1 189.8 245.6 293.3 209.5
kW
26.75 25.61 24.33 27.39 26.21 25.06 27.77
TC
316.6 292.0 266.5 329.6 304.5 282.3 337.3
95 SHC 163.7 207.0 260.4 184.4 239.8 282.3 204.1
kW
28.81 27.54 26.22 29.48 28.18 27.03 29.88
TC
309.7 285.0 260.4 322.5 297.3 276.3 329.8
100 SHC 161.2 204.2 254.8 181.9 236.8 276.3 201.6
kW
29.79 28.42 27.07 30.49 29.10 27.94 30.90
TC
302.3 277.9 254.8 314.5 289.8 270.4 321.4
105 SHC 158.4 201.3 249.7 179.1 233.7 270.4 198.8
kW
30.80 29.23 27.75 31.58 29.99 28.75 32.03
TC
287.5 264.0 243.6 298.6 274.9 258.7 304.6
115 SHC 153.0 195.7 239.4 173.5 227.6 258.7 193.2
kW
32.64 31.01 29.60 33.41 31.77 30.65 33.83

62
345.4
345.4
28.19
331.7
331.7
30.17
324.8
324.8
31.18
318.0
318.0
32.21
303.4
303.4
34.12

576B300/524A-B360 WITH STANDARD 3-ROW COIL
Evaporator Air — Cfm
Temp (F)
9000
12,000
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
TC
353.9 325.8 300.2 367.2 339.2 318.4 374.7
85 SHC 186.0 238.4 293.9 212.4 276.3 318.4 234.9
kW
27.80 26.53 25.37 28.40 27.13 26.19 28.74
TC
337.9 310.6 288.0 350.0 323.1 305.6 356.7
95 SHC 179.9 232.4 282.8 206.6 269.8 305.6 228.9
kW
29.91 28.50 27.33 30.53 29.14 28.24 30.88
TC
330.6 303.1 281.4 342.4 315.4 299.1 348.8
100 SHC 177.2 229.4 276.8 204.0 266.7 299.1 226.3
kW
30.94 29.42 28.23 31.59 30.10 29.20 31.94
TC
322.2 295.2 274.9 333.4 307.1 292.3 339.4
105 SHC 174.0 226.2 270.9 210.0 263.4 292.3 223.1
kW
32.08 30.34 29.04 32.80 31.10 30.15 33.19
TC
305.6 279.5 262.0 315.7 290.5 278.7
—
115 SHC 167.7 220.0 259.2 195.0 256.7 278.7
—
kW
33.90 32.09 30.88 34.59 32.85 32.04
—

10,000
67
347.4
228.6
28.31
331.7
223.9
30.19
323.8
221.7
31.14
315.8
219.3
32.09
299.3
214.7
33.87

12,500
67
347.9
251.7
28.22
331.8
247.2
30.08
323.7
245.0
31.01
315.5
242.8
31.97
298.7
238.0
33.73

15,000
67
368.1
288.0
29.27
350.5
283.0
31.18
341.7
280.5
32.15
332.7
277.8
33.09
314.9
272.7
34.91

—
Edb
Ewb
kW
SHC
TC

—
—
—
—
—
—

10,000
67
305.7
239.4
25.62
292.9
233.6
27.58
286.1
230.5
28.49
279.4
227.4
29.32
265.9
221.3
31.15

12,500
67
329.1
275.9
26.67
314.4
269.5
28.69
307.2
266.4
29.65
299.5
263.0
30.62
284.3
256.4
32.42

67
350.2
311.5
27.63
333.7
304.2
29.69
326.0
300.9
30.69
317.4
297.1
31.77
300.4
289.6
33.54

NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. Evaporator fan heat not deducted from ratings.
3. Ratings based on approximately 12 F superheat leaving coil.
4. Formulas:
sensible heat capacity (Btuh)
Leaving db = entering db –
1.1 x cfm
Leaving wb = wet-bulb temperature corresponding to enthalpy of air
leaving coil (hlwb).
total capacity (Btuh)
4.5 x cfm

Where hewb = enthalpy of air entering coil.
5. SHC is based on 80 F db temperature of air-entering evaporator coil.

20

62
307.4
307.3
25.69
295.9
295.9
27.73
289.9
289.9
28.69
283.8
283.7
29.61
271.5
271.5
31.53

15,000

LEGEND
Out of Range
Entering Dry Bulb
Entering Wet Bulb
Compressor Motor Power Input
Sensible Heat Capacity (1000 Btuh) Gross
Total Capacity (1000 Btuh) Gross

hlwb = hewb –

62
279.5
279.5
24.44
269.6
269.6
26.38
263.9
263.9
27.26
258.6
258.6
27.99
248.0
248.0
29.91

62
378.8
272.3
28.92
327.6
309.3
29.37
305.6
325.3
29.56
283.3
341.4
29.57
244.7
369.4
29.68

PERFORMANCE DATA (cont)
COMBINATION RATINGS (cont)
576B360/524A-C300 WITH HIGH-CAPACITY 4-ROW COIL
Evaporator Air — Cfm
Temp (F)
7500
10,000
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
TC
368.7 338.3 309.5 387.9 357.4 328.0 401.1
85 SHC 147.1 197.7 247.2 165.2 229.0 290.7 182.6
kW
30.30 28.87 27.47 31.20 29.77 28.38 31.83
TC
353.9 324.5 299.7 371.8 342.6 314.2 383.7
95 SHC 142.9 193.1 243.2 161.1 224.3 285.4 178.3
kW
32.14 30.57 28.88 33.09 31.57 30.02 33.72
TC
346.0 317.4 290.1 363.4 334.7 307.1 374.7
100 SHC 140.7 190.8 239.7 158.9 221.9 282.5 176.2
kW
33.07 31.42 29.84 34.05 32.43 30.84 34.67
TC
338.2 310.3 283.5 354.8 326.6 299.5 365.6
105 SHC 138.6 188.4 237.2 156.7 219.5 279.5 174.0
kW
34.00 32.30 30.65 35.00 33.30 31.64 35.63
TC
326.3 300.2 269.7 337.0 310.2 284.6 347.0
115 SHC 135.6 185.1 231.9 152.3 214.7 273.2 169.8
kW
36.68 33.80 32.15 36.79 34.96 33.19 37.47
576B360/524A-C360 WITH HIGH-CAPACITY 4-ROW COIL
Evaporator Air — Cfm
Temp (F)
9000
12,000
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
TC
392.5 360.8 330.6 410.5 378.6 348.0 422.4
85 SHC 162.3 221.7 279.7 183.6 258.3 329.0 204.0
kW
31.43 29.95 28.53 32.26 30.78 29.35 32.80
TC
376.4 345.9 316.5 392.9 362.3 333.5 403.9
95 SHC 157.8 217.0 274.5 179.2 253.6 322.5 199.7
kW
33.35 31.75 30.17 34.23 32.60 31.08 34.80
TC
368.0 338.0 309.4 383.9 353.9 325.7 394.5
100 SHC 155.5 214.5 271.7 177.0 251.2 318.6 197.7
kW
34.32 32.64 30.99 35.19 33.52 31.93 35.81
TC
359.2 330.1 302.1 374.7 345.4 317.9 385.1
105 SHC 153.2 212.0 268.9 174.9 248.8 317.9 195.6
kW
35.26 33.53 31.82 36.18 34.45 32.79 36.81
TC
341.5 313.7 287.3 355.9 328.0 303.4 365.1
115 SHC 148.6 207.0 263.2 170.5 244.0 303.4 191.0
kW
37.09 35.20 33.39 38.06 36.19 34.50 38.66

62
340.7
328.6
28.99
325.2
3252
30.61
318.5
318.5
31.49
311.5
311.5
32.37
298.1
298.1
34.14

576B360/524A-B300 WITH STANDARD 3-ROW COIL
Evaporator Air — Cfm
Temp (F)
7500
10,000
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
TC
352.5 326.2
—
368.2 341.0 310.1 378.3
85 SHC 176.9 220.8
—
198.0 254.7 310.1 217.8
kW
29.31 28.15
—
30.01 28.81 27.44 30.45
TC
339.4 313.7 283.7 354.1 327.7 300.1 363.2
95 SHC 172.1 215.8 276.1 193.0 249.3 300.1 212.7
kW
31.43 30.06 28.47 32.21 30.80 29.34 32.69
TC
332.6 307.3 278.7 346.8 320.8 294.9 355.4
100 SHC 169.6 213.2 271.5 190.4 246.4 294.9 210.1
kW
32.48 31.01 29.35 33.30 31.80 30.29 33.81
TC
325.3 299.8 272.2 339.1 313.1 288.5 347.5
105 SHC 166.9 210.2 265.6 187.8 243.3 288.5 207.5
kW
33.49 31.93 30.24 34.34 32.74 31.24 34.85
TC
311.0 286.2 261.5 323.8 298.6 277.4 331.2
115 SHC 161.6 204.7 255.8 182.4 237.3 277.4 202.1
kW
35.38 33.58 31.79 36.30 34.48 32.94 36.84

62
362.6
362.6
30.03
349.2
349.2
31.92
342.2
342.2
32.87
335.2
335.2
33.84
320.5
320.5
35.67

576B360/524A-B360 WITH STANDARD 3-ROW COIL
Evaporator Air — Cfm
Temp (F)
9000
12,000
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
TC
378.5 349.4 319.1 393.6 364.1 338.1 402.6
85 SHC 195.3 247.7 311.0 221.4 286.4 338.1 244.2
kW
30.46 29.18 27.84 31.13 29.83 28.68 31.52
TC
363.6 335.2 307.9 377.5 349.0 326.3 385.6
95 SHC 189.7 242.1 300.8 215.9 280.3 326.3 238.5
kW
32.71 31.20 29.75 33.45 31.94 30.73 33.88
TC
355.9 327.8 302.0 369.2 341.3 320.2 376.8
100 SHC 186.7 239.2 295.5 213.1 277.1 320.2 235.6
kW
33.83 32.21 30.71 34.61 32.99 31.76 35.05
TC
348.1 319.8 295.0 361.1 333.1 313.3 368.4
105 SHC 183.8 236.0 289.2 210.4 273.8 313.3 232.8
kW
34.89 33.16 31.64 35.69 33.97 32.75 36.14
TC
331.9 304.5 282.6 343.8 316.8 300.3 350.2
115 SHC 177.7 229.9 277.9 204.5 267.3 300.3 226.7
kW
36.89 34.90 33.32 37.75 35.80 34.60 38.22

12,500
67
370.3
258.3
30.38
354.0
253.6
32.15
345.7
251.2
33.05
337.3
248.8
33.95
320.1
244.2
35.65

15,000
67
390.3
292.9
31.34
373.2
288.3
33.19
364.6
285.8
34.14
355.5
283.3
35.05
336.8
278.0
36.78

—
Edb
Ewb
kW
SHC
TC

—
—
—
—
—
—

12,500
67
351.7
285.8
29.28
338.1
279.9
31.36
331.0
276.8
32.39
323.3
273.4
33.37
308.5
267.0
35.20

15,000
67
375.7
322.7
30.34
360.2
315.9
32.53
352.2
312.4
33.62
344.1
308.8
34.64
327.4
301.5
36.57

LEGEND
Out of Range
Entering Dry Bulb
Entering Wet Bulb
Compressor Motor Power Input
Sensible Heat Capacity (1000 Btuh) Gross
Total Capacity (1000 Btuh) Gross

NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. Evaporator fan heat not deducted from ratings.
3. Ratings based on approximately 12 F superheat leaving coil.
4. Formulas:
sensible heat capacity (Btuh)
Leaving db = entering db –
1.1 x cfm
Leaving wb = wet-bulb temperature corresponding to enthalpy of air
leaving coil (hlwb).
hlwb = hewb –

total capacity (Btuh)
4.5 x cfm

Where hewb = enthalpy of air entering coil.
5. SHC is based on 80 F db temperature of air-entering evaporator coil.

21

62
324.8
324.8
28.09
314.4
314.4
30.10
308.9
308.9
31.11
302.6
302.6
32.10
291.0
290.9
33.92

62
354.0
354.0
29.38
341.7
341.7
31.55
335.3
335.3
32.64
328.4
328.4
33.70
314.8
314.8
35.65

PERFORMANCE DATA (cont)
COMBINATION RATINGS (cont)
576H240/524A-C180 HIGH-CAPACITY 4-ROW COILS
Evaporator Air — Cfm
Temp (F)
4500
6000
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
TC
247.3 247.3 225.7 262.2 240.8 220.7 273.0
85 SHC 117.0 117.0 140.5 128.9 159.5 189.5 139.3
kW
16.43 16.43 15.89 16.77 16.27 15.77 17.02
TC
236.5 215.9 196.4 250.6 230.0 212.4 260.3
95 SHC 112.5 136.1 158.6 123.9 154.8 185.2 134.8
kW
17.90 17.27 16.64 18.34 17.72 17.13 18.59
TC
233.0 212.9 191.9 244.7 226.5 206.8 253.8
100 SHC 111.1 135.0 156.5 121.7 153.6 183.7 132.2
kW
18.95 18.22 17.26 19.09 18.74 17.98 19.37
TC
225.4 205.9 187.3 240.9 218.8 199.8 247.3
105 SHC 108.1 131.5 154.3 120.4 150.0 179.4 130.0
kW
19.35 18.62 17.88 20.14 19.10 18.38 20.13
TC
218.0 202.5 177.8 226.1 207.3 196.3 234.2
115 SHC 105.2 130.3 149.9 114.8 145.6 178.7 125.4
kW
21.36 19.93 19.10 21.27 20.46 19.60 21.61
576H240/524A-C240 HIGH-CAPACITY 4-ROW COILS
Evaporator Air — Cfm
Temp (F)
6000
8000
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
TC
275.6 252.5 230.6 289.0 265.9 244.2 298.1
85 SHC 132.9 166.6 298.6 148.2 191.3 231.4 162.5
kW
17.12 16.60 16.07 17.40 16.91 16.42 17.61
TC
263.1 241.1 220.0 275.7 253.5 232.8 289.8
95 SHC 128.2 161.5 193.8 143.4 186.4 225.4 159.6
kW
18.72 18.10 17.45 19.06 18.47 17.85 19.99
TC
256.7 235.2 214.7 269.0 247.0 226.7 276.4
100 SHC 125.7 159.2 191.3 141.1 183.9 222.2 155.1
kW
19.49 18.82 18.13 19.88 19.21 18.54 20.08
TC
250.3 229.3 209.3 261.9 240.3 220.7 269.0
105 SHC 123.4 156.8 188.8 138.6 181.3 220.7 152.6
kW
20.27 19.53 18.79 20.66 19.93 19.21 20.88
TC
237.4 217.2 197.7 247.6 227.0 210.1 254.0
115 SHC 118.5 151.9 183.3 133.6 176.3 210.1 147.6
kW
21.78 20.95 20.07 22.18 21.35 20.62 22.43

62
230.1
211.9
16.00
219.4
206.1
17.38
213.9
203.2
18.05
208.4
200.3
18.71
197.3
193.4
20.02

576H240/524A-B180 STANDARD 3-ROW COIL
Evaporator Air — Cfm/BF
Temp (F)
4500/0.03
6000/0.05
7500/0.08
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
67
62
TC
231.9 209.9
—
244.2 223.5 203.7 252.5 232.4 213.2
85 SHC 113.4 139.3
—
127.0 161.0 203.7 138.6 179.7 213.2
kW
16.32 15.81
—
16.61 16.13 15.67 16.80 16.33 15.89
TC
222.4 202.0
—
233.6 214.6 196.4 241.3 222.8 205.5
95 SHC 110.0 135.8
—
123.0 156.7 196.3 134.6 174.9 205.5
kW
17.77 17.17
—
18.09 17.54 17.01 18.32 17.78 17.27
TC
217.8 197.6 179.2 228.6 210.0 192.1 236.2 218.0 201.3
100 SHC 108.4 133.8 171.6 121.1 154.4 192.1 132.8 172.5 201.3
kW
18.46 17.79 17.17 18.82 18.20 17.60 19.07 18.47 17.91
TC
212.4 193.1 175.3 222.6 204.9 187.9 229.9 212.5 196.8
105 SHC 106.5 131.8 168.2 118.9 152.0 187.9 130.5 169.7 196.8
kW
19.09 18.34 17.64 19.49 18.80 18.13 19.78 19.10 18.48
TC
202.0 183.9 167.1 211.3 194.8 179.0 218.2 201.9 187.8
115 SHC 102.8 127.6 161.0 114.6 147.1 179.0 126.4 164.4 187.7
kW
20.51 19.68 18.92 20.93 20.18 19.46 21.25 20.50 19.86

62
254.5
254.5
16.64
244.3
244.3
18.19
239.0
239.0
18.95
233.8
233.8
18.70
222.7
222.7
21.16

576H240/524A-B240 STANDARD 3-ROW COIL
Evaporator Air — Cfm/BF
Temp (F)
6000/0.03
8000/0.06
10,000/0.07
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
67
62
TC
258.1 236.6 215.6 269.7 248.5 229.3 276.2 257.0 240.4
85 SHC 132.6 167.1 207.7 149.3 193.3 229.3 163.9 217.2 240.4
kW
16.93 16.43 15.94 17.19 16.70 16.26 17.34 16.90 16.52
TC
246.6 226.4 207.2 257.1 237.2 220.4 262.7 245.2 231.0
95 SHC 128.2 162.9 200.5 144.8 188.6 220.4 159.2 211.8 230.9
kW
18.47 17.88 17.32 18.78 18.20 17.71 18.94 18.43 18.02
TC
241.5 221.5 202.7 251.9 232.0 215.9 257.2 239.9 226.4
100 SHC 126.2 160.9 196.5 142.8 186.4 215.9 157.3 209.4 226.4
kW
19.25 18.58 17.96 19.59 18.93 18.40 19.77 19.20 18.75
TC
235.1 215.8 197.9 244.9 225.7 210.8 249.8 233.3 221.1
105 SHC 123.8 158.5 192.4 140.3 183.7 210.8 154.6 206.4 221.1
kW
19.98 19.23 18.53 20.37 19.61 19.03 20.56 19.91 19.43
TC
223.2 204.7 188.3 232.3 213.8 200.8 236.5 221.1 210.9
115 SHC 119.3 154.0 184.0 135.8 178.7 200.8 150.0 200.8 210.9
kW
21.47 20.63 19.89 21.89 21.04 20.45 22.08 21.38 20.91

7500
67
251.1
176.7
16.52
239.4
172.1
17.99
233.5
169.6
18.72
227.5
167.2
19.42
215.4
162.5
20.82

10,000
67
274.5
214.1
17.11
261.1
208.9
18.67
254.4
206.5
19.43
247.5
203.8
20.18
233.7
198.5
21.63

—
BF
Edb
Ewb
kW
SHC
TC

—
—
—
—
—
—
—

LEGEND
Out of Range
Bypass Factor
Entering Dry Bulb
Entering Wet Bulb
Compressor Motor Power Input
Sensible Heating Capacity (1000 Btuh)
Total Capacity (1000 Btuh)

NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. Evaporator fan heat not deducted from ratings.
3. Ratings based on approximately 12 F superheat leaving coil.
4. Formulas:
sensible heat capacity (Btuh)
Leaving db = entering db –
1.1 x cfm
Leaving wb = wet-bulb temperature corresponding to enthalpy of air
leaving coil (hlwb).
hlwb = hewb –

total capacity (Btuh)
4.5 x cfm

Where hewb = enthalpy of air entering coil.
5. SHC is based on 80 F db temperature of air-entering evaporator coil.

22

PERFORMANCE DATA (cont)
COMBINATION RATINGS (cont)
576H240/524A-C300 HIGH-CAPACITY 4-ROW COILS
Evaporator Air — Cfm
Temp (F)
7500
10,000
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
TC
299.4 275.5 245.2 309.9 285.9 258.0 311.2
85
SHC 157.5 204.4 225.2 177.5 236.5 258.0 180.7
kW
17.65 17.15 16.46 17.86 17.37 16.74 17.88
TC
291.4 262.2 233.1 295.0 271.9 247.6 296.4
95
SHC 154.7 199.1 219.3 172.3 230.9 247.6 175.6
kW
20.15 18.72 17.91 19.58 18.99 18.31 19.62
TC
278.1 255.5 227.4 287.6 265.0 242.4 288.9
100
SHC 150.1 196.8 216.7 169.7 228.2 242.4 173.1
kW
20.16 19.49 18.59 20.43 19.78 19.08 20.46
TC
270.8 248.7 221.6 280.0 257.9 237.0 281.2
105
SHC 147.6 194.1 213.8 167.5 225.7 237.0 170.7
kW
20.96 20.24 19.28 21.25 20.56 19.84 21.29
TC
256.2 235.0 209.6 264.8 243.4 225.8 265.7
115
SHC 142.5 188.8 206.8 162.1 219.9 225.8 165.3
kW
22.53 21.71 20.64 22.87 22.05 21.30 22.91
576H300/524A-C240 HIGH-CAPACITY 4-ROW COILS
Evaporator Air — Cfm
Temp (F)
6000
8000
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
TC
302.4 277.4 253.6 318.8 293.3 269.1 329.4
85 SHC 143.6 177.3 209.7 159.1 202.7 243.6 173.3
kW
20.63 19.94 19.25 21.07 20.40 19.71 21.33
TC
290.0 266.0 243.1 304.9 280.5 257.5 320.2
95 SHC 138.7 172.3 204.6 154.0 197.1 238.1 170.5
kW
22.43 21.63 20.83 22.91 22.11 21.33 24.02
TC
283.8 260.1 237.5 298.0 274.1 251.1 307.3
100 SHC 136.2 169.7 202.1 151.5 194.5 234.9 165.7
kW
23.32 22.45 21.58 23.82 22.96 22.11 24.14
TC
277.3 258.7 231.9 290.9 267.4 245.4 300.0
105 SHC 133.6 169.2 199.5 148.9 192.0 232.2 163.1
kW
24.19 22.96 22.33 24.71 23.80 22.90 25.06
TC
263.8 241.8 226.3 276.4 254.2 233.6 284.5
115 SHC 128.5 162.0 197.5 143.7 186.8 226.1 157.9
kW
25.94 24.91 23.87 26.53 25.51 24.53 26.90

62
272.9
272.9
17.08
261.4
261.4
18.71
255.6
255.6
19.48
249.7
249.7
20.26
237.9
237.9
21.84

576H240/524A-B300 STANDARD 3-ROW COIL
Evaporator Air — Cfm/BF
Temp (F)
7500/0.04
10,000/0.06
12,500/0.08
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
67
62
TC
278.4 254.6 235.5 289.1 265.4 250.7 294.9 274.8 263.5
85
SHC 149.6 191.9 232.0 170.2 223.7 250.7 190.0 252.2 263.5
kW
17.39 16.85 16.40 17.64 17.09 16.75 17.77 17.31 17.05
TC
265.2 242.4 225.7 275.0 252.3 240.3 279.9 261.3 252.5
95
SHC 144.8 187.0 223.0 165.2 218.3 240.3 185.0 246.4 252.2
kW
19.01 18.35 17.86 19.30 18.64 18.29 19.44 18.90 18.64
TC
259.8 237.0 220.9 269.4 246.7 235.6 274.2 255.7 247.8
100
SHC 142.8 184.8 218.6 163.2 216.0 235.6 183.1 243.9 247.8
kW
19.86 19.10 18.56 20.18 19.42 19.05 20.34 19.72 19.46
TC
252.5 230.2 215.4 261.6 239.5 229.7 266.1 248.3 241.6
105
SHC 140.1 182.1 213.5 160.5 213.1 229.7 180.4 240.7 241.6
kW
20.66 19.79 19.21 21.02 20.15 19.77 21.19 20.50 20.24
TC
239.5 217.6 204.7 248.0 226.4 218.8 251.8 235.0 230.3
115
SHC 135.4 177.0 203.7 155.7 207.7 218.7 175.6 234.9 230.3
kW
22.21 21.22 20.63 22.60 21.62 21.27 22.77 22.01 21.80

62
279.9
272.3
20.02
267.4
267.4
21.68
261.9
261.9
22.51
255.9
255.9
23.32
244.9
244.9
25.05

576H300/524A-B240 STANDARD 3-ROW COIL
Evaporator Air — Cfm/BF
Temp (F)
6000/0.03
8000/0.06
10,000/0.07
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
67
62
TC
281.6 258.4
—
294.8 272.1 248.7 302.9 281.2 260.2
85 SHC 141.5 176.0
—
158.4 203.3 248.7 173.3 228.3 260.2
kW
20.29 19.63
—
20.66 20.02 19.35 20.90 20.28 19.68
TC
270.0 247.7 225.1 282.4 260.5 239.2 289.7 269.3 250.5
95 SHC 137.1 171.6 216.1 153.9 198.4 239.2 168.7 222.8 250.5
kW
22.13 21.39 20.64 22.55 21.82 21.11 22.79 22.11 21.48
TC
264.3 242.6 221.0 276.1 254.8 234.7 283.0 263.4 245.8
100 SHC 134.9 169.5 212.5 151.6 196.0 234.7 166.3 220.1 245.8
kW
23.00 22.16 21.33 23.45 22.63 21.86 23.71 22.96 22.28
TC
258.7 237.2 216.1 270.4 249.1 229.9 276.9 257.6 240.9
105 SHC 132.8 167.3 208.2 149.5 193.6 229.8 164.2 217.5 240.9
kW
23.88 22.97 22.08 24.37 23.47 22.66 24.65 23.83 23.13
TC
247.3 227.1 207.8 257.8 237.8 220.9 263.4 245.8 231.5
115 SHC 128.4 163.2 201.0 145.0 188.8 220.9 159.4 212.1 231.5
kW
25.64 24.55 23.50 26.21 25.13 24.22 26.52 25.57 24.79

12,500
67
287.3
241.5
17.40
273.2
235.9
19.03
266.3
233.2
19.82
259.1
230.6
20.60
244.1
224.5
22.08

10,000
67
303.6
225.5
20.68
290.1
219.9
22.44
283.3
217.5
23.31
276.4
214.9
24.15
262.0
209.5
25.87

—
BF
Edb
Ewb
kW
SHC
TC

—
—
—
—
—
—
—

LEGEND
Out of Range
Bypass Factor
Entering Dry Bulb
Entering Wet Bulb
Compressor Motor Power Input
Sensible Heating Capacity (1000 Btuh)
Total Capacity (1000 Btuh)

NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. Evaporator fan heat not deducted from ratings.
3. Ratings based on approximately 12 F superheat leaving coil.
4. Formulas:
sensible heat capacity (Btuh)
Leaving db = entering db –
1.1 x cfm
Leaving wb = wet-bulb temperature corresponding to enthalpy of air
leaving coil (hlwb).
hlwb = hewb –

total capacity (Btuh)
4.5 x cfm

Where hewb = enthalpy of air entering coil.
5. SHC is based on 80 F db temperature of air-entering evaporator coil.

23

PERFORMANCE DATA (cont)
COMBINATION RATINGS (cont)
576H300/524A-C300 HIGH-CAPACITY 4-ROW COILS
Evaporator Air — Cfm
Temp (F)
7500
10,000
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
TC
321.7 295.1 270.3 336.2 309.9 285.1 346.1
85 SHC 156.6 197.5 236.7 174.2 226.5 274.6 190.8
kW
21.19 20.49 19.79 21.56 20.90 20.23 21.83
TC
307.6 282.6 258.5 321.4 296.3 281.0 330.3
95 SHC 151.0 191.9 231.1 168.9 221.1 272.5 185.7
kW
23.04 22.24 21.42 23.49 22.71 21.99 23.76
TC
300.4 276.2 252.6 314.0 289.2 265.9 322.5
100 SHC 148.4 189.3 228.4 166.4 218.4 265.9 183.0
kW
23.95 23.10 22.22 24.43 23.58 22.71 24.71
TC
293.5 274.5 246.8 306.3 282.0 260.1 314.4
105 SHC 145.8 188.5 225.7 163.8 215.7 260.1 180.3
kW
24.86 23.67 23.01 25.34 24.44 23.55 25.63
TC
279.3 256.5 234.4 290.7 267.5 248.8 298.1
115 SHC 140.5 181.5 219.8 158.4 210.2 248.8 174.9
kW
26.71 25.68 24.64 27.22 26.19 25.30 27.54
576H300/524A-C360 HIGH-CAPACITY 4-ROW COILS
Evaporator Air — Cfm
Temp (F)
9000
12,000
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
TC
341.1 313.9 288.0 354.8 327.1 303.5 363.5
85 SHC 170.3 219.8 266.7 191.9 254.3 303.5 211.1
kW
21.75 21.06 20.38 22.10 21.41 20.75 22.31
TC
326.4 299.9 274.8 338.7 312.1 292.1 347.0
95 SHC 165.1 214.3 260.7 186.2 248.6 292.1 205.9
kW
23.72 22.89 22.07 24.08 23.27 22.62 24.34
TC
318.7 292.7 268.4 330.6 304.6 286.4 338.6
100 SHC 162.3 211.5 257.6 183.5 245.8 286.4 203.1
kW
24.65 23.77 22.89 25.05 24.18 23.53 25.32
TC
310.9 291.1 262.1 322.4 297.0 280.3 330.2
105 SHC 159.6 210.8 254.3 180.5 242.9 280.3 200.5
kW
25.59 24.32 23.70 26.00 25.08 24.43 26.30
TC
295.2 271.0 248.8 306.0 281.6 268.0 313.1
115 SHC 154.2 203.3 248.8 175.4 237.2 268.0 195.0
kW
27.49 26.44 25.40 27.96 26.92 26.27 28.27

62
297.8
297.8
20.55
286.4
286.4
22.36
280.7
280.7
23.26
274.9
274.9
24.15
262.8
262.8
25.96

576H300/524A-B300 STANDARD 3-ROW COIL
Evaporator Air — Cfm/BF
Temp (F)
7500/0.04
10,000/0.06
12,500/0.08
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
67
62
TC
304.2 279.9 256.5 316.4 291.8 272.1 323.5 301.5 285.4
85 SHC 159.1 202.1 251.2 179.8 234.5 272.1 199.5 263.9 285.4
kW
20.93 20.24 19.57 21.28 20.58 20.02 21.48 20.86 20.40
TC
291.5 267.4 246.2 303.0 278.7 261.6 309.3 288.3 274.6
95 SHC 154.4 197.1 241.7 175.0 229.2 261.6 194.8 258.2 274.6
kW
22.85 22.05 21.34 23.23 22.42 21.85 23.44 22.74 22.29
TC
284.9 261.3 241.3 295.9 272.2 256.4 301.9 281.6 269.2
100 SHC 152.0 194.6 237.3 172.6 226.5 256.4 192.3 255.2 269.2
kW
23.79 22.88 22.11 24.21 23.30 22.69 24.44 23.66 23.18
TC
279.0 255.3 236.1 289.8 266.0 251.3 295.6 275.4 264.0
105 SHC 149.9 192.2 232.5 170.4 224.0 251.3 190.2 252.5 264.0
kW
27.74 23.74 22.92 25.20 24.19 23.57 25.44 24.59 24.11
TC
265.8 243.1 226.3 275.7 253.0 240.9 280.7 262.0 253.1
115 SHC 145.0 187.3 223.5 165.4 218.6 240.9 185.2 246.7 253.1
kW
26.65 25.42 24.51 27.18 25.95 25.30 27.45 26.44 25.96

62
320.5
320.5
21.22
307.8
307.8
23.11
301.4
301.4
24.05
294.9
294.9
24.98
282.0
282.0
26.91

576H300/524A-B360 STANDARD 3-ROW COIL
Evaporator Air — Cfm/BF
Temp (F)
9000/0.04
12,000/0.06
15,000/0.08
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
67
62
TC
324.3 297.3 276.8 335.5 309.2 294.1 341.6 319.6 289.1
85 SHC 174.8 227.1 272.6 201.7 264.2 294.1 223.9 298.0 337.2
kW
21.51 20.74 20.15 21.83 21.08 20.65 22.00 21.37 20.50
TC
310.3 283.6 265.2 320.8 295.0 282.3 326.2 305.1 253.1
95 SHC 169.4 221.6 262.1 196.7 258.5 282.3 218.7 291.7 363.3
kW
23.48 22.59 21.97 23.83 22.96 22.54 24.01 23.30 21.57
TC
302.8 276.7 259.5 312.8 287.6 276.3 317.9 297.5 237.4
100 SHC 166.6 218.9 257.0 194.0 255.5 276.3 216.0 288.4 374.6
kW
24.48 23.47 22.81 24.86 23.89 23.46 25.06 24.27 21.96
TC
296.6 270.3 253.9 306.4 281.1 270.7 311.3 291.1 221.1
105 SHC 164.3 216.4 251.9 191.9 252.9 270.7 213.8 285.5 386.4
kW
25.48 24.37 23.68 25.90 24.83 24.39 26.10 25.25 22.29
TC
281.8 256.6 242.6 290.5 266.6 258.6 294.7 276.0 195.2
115 SHC 158.6 210.9 241.6 186.5 247.0 258.6 208.2 278.9 405.2
kW
27.51 26.15 25.39 27.99 26.69 26.26 28.21 27.20 22.83

12,500
67
319.6
253.4
21.16
304.8
247.5
22.98
297.4
245.0
23.86
289.8
242.1
24.74
274.8
236.3
26.52

15,000
67
323.2
280.6
20.07
320.4
279.6
23.54
312.6
276.8
24.46
304.9
273.8
25.38
288.2
267.0
27.21

BF
Edb
Ewb
kW
SHC
TC

—
—
—
—
—
—

LEGEND
Bypass Factor
Entering Dry Bulb
Entering Wet Bulb
Compressor Motor Power Input
Sensible Heating Capacity (1000 Btuh)
Total Capacity (1000 Btuh)

NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. Evaporator fan heat not deducted from ratings.
3. Ratings based on approximately 12 F superheat leaving coil.
4. Formulas:
sensible heat capacity (Btuh)
Leaving db = entering db –
1.1 x cfm
Leaving wb = wet-bulb temperature corresponding to enthalpy of air
leaving coil (hlwb).
hlwb = hewb –

total capacity (Btuh)
4.5 x cfm

Where hewb = enthalpy of air entering coil.
5. SHC is based on 80 F db temperature of air-entering evaporator coil.

24

PERFORMANCE DATA (cont)
COMBINATION RATINGS (cont)
576H360/524A-C300 HIGH-CAPACITY 4-ROW COILS
Evaporator Air — Cfm
Temp (F)
7500
10,000
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb
72
67
62
72
67
62
72
TC
376.4 346.1 317.3 393.3 362.8 334.3 404.4
85 SHC 185.9 234.4 281.1 207.1 269.0 322.7 226.9
kW
26.61 25.60 24.61 27.19 26.18 25.21 27.55
TC
361.0 335.7 307.7 376.4 347.0 321.1 386.5
95 SHC 180.1 230.3 276.8 201.2 262.9 313.4 220.8
kW
28.71 27.60 26.33 29.32 28.19 27.14 29.71
TC
353.0 324.4 297.3 367.7 339.0 314.5 377.6
100
SHC 177.2 225.4 271.3 198.2 259.8 308.5 217.9
kW
29.75 28.55 27.37 30.36 29.18 28.11 30.79
TC
344.9 317.0 290.5 359.0 331.0 307.9 368.5
105
SHC 174.2 222.5 267.9 195.2 256.7 303.7 214.9
kW
30.80 29.55 28.30 31.44 30.20 29.10 31.87
TC
328.2 301.8 276.7 341.3 320.1 294.0 350.0
115
SHC 168.0 216.4 262.1 189.1 253.1 294.0 208.7
kW
32.88 31.50 30.14 33.55 32.23 31.05 33.99
576H360/524A-C360 HIGH-CAPACITY 4-ROW COILS
Evaporator Air — Cfm
Temp (F)
9000
12,000
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
TC
385.1 353.5 323.6 402.4 370.6 342.0 413.9
85 SHC 188.1 238.2 286.2 210.3 274.3 330.0 230.9
kW
26.95 25.92 24.91 27.52 26.50 25.52 27.90
TC
369.4 352.8 310.0 385.2 354.6 329.8 395.8
95 SHC 182.2 243.8 279.9 204.3 268.0 321.7 224.8
kW
29.08 28.20 26.76 29.68 28.53 27.45 30.09
TC
365.2 346.0 303.2 376.3 346.5 321.8 386.7
100 SHC 180.6 241.9 276.7 201.1 265.0 315.4 221.8
kW
29.73 29.28 27.69 30.76 29.55 28.48 31.20
TC
356.5 337.7 296.3 367.6 338.4 315.0 377.6
105 SHC 177.6 238.7 273.3 198.2 261.8 310.5 218.8
kW
30.99 30.30 28.63 31.85 30.57 29.48 32.30
TC
335.8 311.7 282.5 349.7 324.0 300.7 358.7
115 SHC 169.9 221.3 266.8 192.1 254.0 300.7 212.6
kW
33.27 31.09 30.50 33.99 32.59 31.43 34.44

62
350.1
350.1
25.72
336.8
336.8
27.75
330.1
330.1
28.76
326.4
326.3
29.50
312.6
312.6
31.78

576H360/524A-B300 STANDARD 3-ROW COIL
Evaporator Air — Cfm/BF
Temp (F)
7500/0.04
10,000/0.06
12,500/0.08
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb
72
67
62
72
67
62
72
67
62
TC
338.9 312.7 282.3 353.8 326.9 299.0 363.1 337.4 313.5
85
SHC 171.9 215.4 274.9 192.9 248.9 299.0 212.7 279.6 313.5
kW
25.39 24.59 23.67 25.84 25.02 24.18 26.12 25.34 24.62
TC
325.5 299.5 271.5 339.6 313.0 288.1 348.2 323.5 302.4
95
SHC 167.0 210.0 265.0 187.9 243.3 288.1 207.7 273.5 302.4
kW
27.53 26.56 25.51 28.06 27.06 26.13 28.38 27.46 26.66
TC
319.5 294.4 268.1 332.8 307.2 284.1 340.8 317.3 297.9
100
SHC 164.7 208.0 261.8 185.5 240.9 284.1 205.3 270.8 297.9
kW
28.63 27.54 26.40 29.21 28.10 27.09 29.55 28.53 27.69
TC
312.6 287.4 262.1 325.7 300.0 278.2 333.4 310.2 292.0
105
SHC 162.2 205.2 256.3 183.1 237.9 278.2 202.8 267.7 292.0
kW
29.77 28.59 27.41 30.38 29.18 28.16 30.74 29.66 28.81
TC
281.0 257.3 237.8 291.8 268.1 253.0 297.7 277.5 265.8
115
SHC 150.6 193.0 234.1 171.1 224.8 253.0 190.9 253.4 265.8
kW
32.40 31.04 29.91 33.03 31.66 30.79 33.37 32.20 31.52

62
358.4
358.4
26.05
344.7
344.7
28.09
337.8
337.8
29.13
331.1
331.1
30.18
317.4
317.4
32.30

576H360/524A-B360 STANDARD 3-ROW COIL
Evaporator Air — Cfm/BF
Temp (F)
9000/0.04
12,000/0.06
15,000/0.08
Air Entering
Condenser
Evaporator Air — Ewb (F)
(Edb)
72
67
62
72
67
62
72
67
62
TC
363.5 334.5 306.8 377.7 348.6 325.5 385.9 360.0 417.3
85 SHC 189.6 241.8 299.8 216.0 280.1 325.5 238.6 315.8 244.4
kW
26.13 25.25 24.41 26.56 25.68 24.98 26.81 26.03 27.76
TC
348.8 319.9 294.7 362.1 333.5 313.2 369.6 344.7 362.7
95 SHC 184.0 236.0 288.8 210.7 274.0 313.2 233.2 309.1 283.9
kW
28.40 27.32 26.37 28.90 27.83 27.07 29.19 28.25 28.93
TC
341.4 313.6 290.1 353.9 326.4 308.0 360.8 337.2 337.8
100 SHC 181.3 233.5 284.7 207.9 271.2 308.0 230.3 305.8 302.0
kW
29.58 28.37 27.35 30.12 28.93 28.13 30.42 29.40 29.42
TC
334.2 306.1 283.6 346.4 318.8 301.6 353.1 329.6 315.0
105 SHC 178.5 230.6 278.8 205.4 268.1 301.6 227.7 302.5 318.5
kW
30.77 29.47 28.41 31.34 30.06 29.25 31.66 30.56 29.88
TC
298.7 272.4 255.8 308.5 283.3 272.6 313.5 293.2 226.5
115 SHC 165.1 217.2 253.6 192.6 253.8 272.6 214.5 286.5 382.5
kW
33.42 31.91 30.95 33.99 32.54 31.92 34.28 33.11 29.26

12,500
67
373.6
300.8
26.55
357.1
294.4
28.60
348.8
291.3
29.60
340.3
288.0
30.63
323.0
281.1
32.63

15,000
67
381.8
307.4
26.89
365.3
301.2
28.97
356.9
298.0
30.00
348.2
294.7
31.03
332.7
288.7
33.05

BF
Edb
Ewb
kW
SHC
TC

—
—
—
—
—
—

LEGEND
Bypass Factor
Entering Dry Bulb
Entering Wet Bulb
Compressor Motor Power Input
Sensible Heating Capacity (1000 Btuh)
Total Capacity (1000 Btuh)

NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. Evaporator fan heat not deducted from ratings.
3. Ratings based on approximately 12 F superheat leaving coil.
4. Formulas:
sensible heat capacity (Btuh)
Leaving db = entering db –
1.1 x cfm
Leaving wb = wet-bulb temperature corresponding to enthalpy of air
leaving coil (hlwb).
hlwb = hewb –

total capacity (Btuh)
4.5 x cfm

Where hewb = enthalpy of air entering coil.
5. SHC is based on 80 F db temperature of air-entering evaporator coil.

25

PERFORMANCE DATA (cont)
524A WITH STANDARD 3-ROW COIL FAN PERFORMANCE DATA — 0.0-2.4 ESP

180

4,500
5,300
6,000
6,800
7,500

Rpm
428
488
542
604
660

Bhp
0.59
0.92
1.29
1.83
2.42

Rpm
475
528
578
637
690

Bhp
0.70
1.04
1.43
1.99
2.59

EXTERNAL STATIC PRESSURE (in. wg)
0.4
0.6
0.8
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
1.68
570
0.99
656
1.33
730
609
1.34
689
1.71
762
2.11
649
1.74
721
2.11
791
2.55
700
2.32
763
2.70
826
3.15
747
2.95
804
3.34
861
3.79

240

6,000
7,000
8,000
9,000
10,000

532
608
686
764
843

1.25
1.93
2.83
3.97
5.38

569
641
716
791
868

1.39
2.09
3.01
4.18
5.62

639
702
770
841
914

1.69
2.42
3.38
4.59
6.09

711
763
823
888
957

2.06
2.80
3.77
5.02
6.55

781
824
876
935
1000

2.48
3.23
4.21
5.47
7.02

846
885
930
982
1042

2.93
3.71
4.70
5.96
7.53

905
943
983
1030
1084

3.39
4.23
5.24
6.51
8.08

300

7,500
8,750
10,000
11,250
12,500

456
521
587
653
720

1.29
1.98
2.88
4.03
5.46

490
551
614
678
743

1.47
2.18
3.11
4.29
5.75

556
608
664
724
785

1.85
2.61
3.59
4.82
6.33

621
664
714
768
825

2.25
3.07
4.09
5.37
6.93

678
720
763
812
865

2.64
3.53
4.62
5.95
7.55

729
770
812
856
904

3.06
3.99
5.15
6.54
8.20

778
816
857
899
944

3.60
4.45
5.68
7.14
8.86

360

9,000
10,500
12,000
13,500
15,000

521
596
673
751
829

1.99
3.16
4.63
6.51
8.84

550
623
698
773
850

2.25
3.40
4.90
6.82
9.19

616
672
743
815
888

2.77
3.89
5.45
7.44
9.88

676
720
785
853
924

3.23
4.40
6.02
8.06
10.57

731
767
826
890
958

3.72
4.94
6.62
8.71
11.27

782
814
867
927
991

4.20
5.50
7.23
9.38
11.99

829
859
908
963
1024

4.70
6.05
7.87
10.07
12.73

UNIT
524A

AIRFLOW
(Cfm)

UNIT
524A

AIRFLOW
(Cfm)

0.0

0.2

1.4

1.6

EXTERNAL STATIC PRESSURE (in. wg)
1.8
2.0
Rpm
Bhp
Rpm
Bhp
1019
3.52
1070
3.92
1041
4.18
1088
4.61
1066
4.85
1112
5.32
1097
5.71
1142
6.23
1125
6.54
1170
7.11

180

4,500
5,300
6,000
6,800
7,500

Rpm
912
940
968
1000
1028

Bhp
2.75
3.33
3.92
4.67
5.39

Rpm
967
992
1018
1050
1078

Bhp
3.13
3.75
4.38
5.19
5.97

240

6,000
7,000
8,000
9,000
10,000

954
990
1028
1073
1126

3.83
4.74
5.79
7.11
8.75

1005
1040
1078
1120
1166

4.27
5.24
6.38
7.72
9.37

1052
1090
1130
1169
—

4.72
5.80
7.00
8.37
—

1098
1135
1173
—
—

300

7,500
8,750
10,000
11,250
12,500

831
859
900
941
984

4.41
4.97
6.20
7.73
9.53

870
901
939
980
1022

5.10
5.59
6.74
8.32
10.19

913
944
976
1017
1058

5.90
6.42
7.33
8.90
10.84

360

9,000
10,500
12,000
13,500
15,000

866
902
949
1000
1057

5.20
6.60
8.50
10.78
13.49

899
942
988
1036
1090

5.85
7.14
9.14
11.49
14.28

950
980
1026
1073
—

6.65
7.70
9.76
12.21
—

1.0
Rpm
Bhp
796
2.02
827
2.51
855
3.00
888
3.64
919
4.29

1.2
Rpm
Bhp
856
2.38
886
2.92
914
3.46
946
4.15
975
4.83

2.2

2.4

Rpm
1120
1134
1156
1185
—

Bhp
4.35
5.06
5.80
6.76
—

Rpm
1168
1179
1198
—
—

Bhp
4.79
5.52
6.29
—
—

5.22
6.30
7.60
—
—

1142
1176
—
—
—

5.67
6.84
—
—
—

—
—
—
—
—

—
—
—
—
—

950
980
1013
1052
1093

6.88
7.20
8.00
9.51
11.49

985
1020
1050
1086
—

7.70
8.10
8.82
10.16
—

—
—
—
—
—

—
—
—
—
—

989
1016
1062
—
—

7.38
8.31
10.38
—
—

1029
1051
1095
—
—

8.32
8.99
11.01
—
—

1077
1085
—
—
—

9.74
9.77
—
—
—

FACTORY-SUPPLIED FILTER PRESSURE DROP
(in. wg)

LEGEND
Bhp — Brake Horsepower Input to Fan
ESP — External Static Pressure

UNIT
524A

Bold indicates special field-supplied drive is required.
Plain type indicates standard drive and standard motor.
Underline indicates a different motor and drive combination is required.
Refer to the fan motor and drive tables, pages 44 and 45, to complete
the selection.

180

NOTES:
1. Maximum allowable fan speed is 1100 rpm for unit sizes 300 and
360; 1200 rpm for all other sizes.
2. Fan performance is based on deductions for wet coil, clean 2-in.
filters, and unit casing. See right for factory-supplied filter pressure
drop.
3. Factory-supplied motor for 360 size is standard 10 Hp motor only;
alternate motor not available.

240
300
360

26

AIRFLOW
(Cfm)
4,500
6,000
7,500
6,000
8,000
10,000
7,500
10,000
12,500
9,000
12,000
15,000

PRESSURE DROP
(in. wg)
0.08
0.12
0.17
0.12
0.19
0.26
0.15
0.22
0.30
0.19
0.29
0.40

PERFORMANCE DATA (cont)
524A WITH HIGH CAPACITY 4-ROW COIL FAN PERFORMANCE DATA — 0.0-2.4 ESP

180

4,500
5,300
6,000
6,800
7,500

Rpm
437
499
555
620
677

Bhp
0.61
0.95
1.34
1.91
2.52

Rpm
483
538
590
651
706

Bhp
0.72
1.07
1.48
2.06
2.69

EXTERNAL STATIC PRESSURE (in. wg)
0.4
0.6
0.8
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
1.69
576
1.01
660
1.35
732
617
1.37
696
1.74
767
2.13
659
1.79
730
2.17
798
2.59
712
2.39
774
2.78
836
3.22
761
3.04
817
3.44
873
3.89

240

6,000
7,000
8,000
9,000
10,000

542
620
700
781
862

1.29
1.99
2.92
4.10
5.56

577
652
728
806
885

1.42
2.15
3.10
4.30
5.79

646
711
781
854
929

1.72
2.48
3.46
4.71
6.24

716
771
833
900
971

2.09
2.85
3.85
5.13
6.70

785
831
885
946
1012

2.51
3.28
4.29
5.58
7.18

849
890
938
993
1054

2.95
3.76
4.78
6.08
7.69

907
947
990
1039
1096

3.40
4.27
5.32
6.62
8.24

300

7,500
8,750
10,000
11,250
12,500

476
545
615
685
756

1.39
2.14
3.12
4.37
5.92

510
574
641
709
778

1.58
2.35
3.36
4.64
6.22

579
633
692
754
819

1.99
2.81
3.87
5.20
6.83

644
691
743
800
860

2.40
3.29
4.41
5.79
7.47

701
747
794
845
901

2.81
3.77
4.96
6.40
8.14

752
797
843
891
942

3.29
4.25
5.51
7.02
8.83

804
842
888
935
983

3.96
4.76
6.05
7.64
9.52

360

9,000
10,500
12,000
13,500
15,000

539
620
701
783
865

2.18
3.37
4.94
6.95
9.45

569
646
724
804
884

2.39
3.62
5.22
7.27
9.81

626
695
769
844
921

2.85
4.13
5.80
7.91
10.52

683
744
811
883
956

3.34
4.68
6.40
8.57
11.24

739
793
854
920
991

3.83
5.25
7.04
9.26
11.98

791
842
897
958
1025

4.32
5.83
7.69
9.97
12.75

837
888
940
996
1059

4.82
6.41
8.36
10.71
13.54

UNIT
524A

AIRFLOW
(Cfm)

UNIT
524A

AIRFLOW
(Cfm)

0.0

0.2

1.4

1.6

1.0
Rpm
Bhp
797
2.03
830
2.53
860
3.04
896
3.71
929
4.39

1.2
Rpm
Bhp
856
2.38
888
2.94
918
3.49
952
4.21
984
4.93

EXTERNAL STATIC PRESSURE (in. wg)
1.8
2.0
2.2
Bhp
Rpm
Bhp
Rpm
Bhp
Rpm
3.12
1019
3.52
1070
3.92
1120
3.76
1041
4.18
1088
4.61
1134
4.40
1067
4.86
1112
5.33
1156
5.23
1101
5.75
1145
6.27
1187
6.04
1131
6.61
1174
7.17
—

180

4,500
5,300
6,000
6,800
7,500

Rpm
912
942
971
1005
1036

Bhp
2.75
3.34
3.95
4.72
5.48

Rpm
967
992
1020
1054
1084

240

6,000
7,000
8,000
9,000
10,000

961
1000
1041
1086
1138

3.86
4.79
5.88
7.21
8.83

1011
1050
1090
1133
1180

4.31
5.32
6.47
7.82
9.46

1058
1097
1137
1178
—

4.77
5.85
7.07
8.47
—

1104
1142
1181
—
—

5.24
6.38
7.67
—
—

300

7,500
8,750
10,000
11,250
12,500

874
886
930
976
1023

5.33
5.36
6.60
8.25
10.20

897
930
969
1014
1061

5.91
6.13
7.20
8.86
10.88

940
982
1007
1051
1097

6.80
7.32
7.89
9.49
11.56

990
1020
1045
1086
—

360

9,000
10,500
12,000
13,500
15,000

881
930
981
1035
1093

5.37
6.97
9.02
11.45
14.35

923
970
1021
1072
—

6.03
7.55
9.67
12.20
—

967
1008
1058
—
—

6.89
8.17
10.32
—
—

1020
1045
1094
—
—

2.4
Bhp
4.35
5.06
5.81
6.79
—

Rpm
1168
1179
1198
—
—

Bhp
4.79
5.52
6.29
—
—

1147
1184
—
—
—

5.71
6.91
—
—
—

—
—
—
—
—

—
—
—
—
—

7.50
8.10
8.71
10.17
—

—
—
—
—
—

—
—
—
—
—

—
—
—
—
—

—
—
—
—
—

8.25
8.86
10.97
—
—

—
—
—
—
—

—
—
—
—
—

—
—
—
—
—

—
—
—
—
—

FACTORY-SUPPLIED FILTER PRESSURE DROP
(in. wg)

LEGEND
Bhp — Brake Horsepower Input to Fan
ESP — External Static Pressure

UNIT
524A

Bold indicates special field-supplied drive is required.
Plain type indicates standard drive and standard motor.
Underline indicates a different motor and drive combination is required.
Refer to the fan motor and drive tables, pages 44 and 45, to complete
the selection.

180

NOTES:
1. Maximum allowable fan speed is 1100 rpm for unit sizes 300 and
360; 1200 rpm for all other sizes.
2. Fan performance is based on deductions for wet coil, clean 2-in.
filters, and unit casing. See right for factory-supplied filter pressure
drop.
3. Factory-supplied motor for 360 size is standard 10 Hp motor only;
alternate motor not available.

240
300
360

27

AIRFLOW
(Cfm)
4,500
6,000
7,500
6,000
8,000
10,000
7,500
10,000
12,500
9,000
12,000
15,000

PRESSURE DROP
(in. wg)
0.08
0.12
0.17
0.12
0.19
0.26
0.15
0.22
0.30
0.19
0.29
0.40

PERFORMANCE DATA (cont)
524A ACCESSORY PLENUM AIR THROW DATA
(ft)
UNIT
524A

AIRFLOW
(Cfm)

180
240
300
360

6,000
8,000
10,000
12,000

Straight
50
60
76
85

VANE DEFLECTION
221/2°
43
51
65
72

45°
31
37
47
52

NOTE: Throw distances shown are for 75 fpm terminal velocity. Use the following multipliers to determine throw values for other terminal velocities.
TERMINAL VELOCITY
(Fpm)
50
100
150

THROW
FACTOR
X 1.50
X 0.75
X 0.50

524A ACCESSORY PRESSURE DROP (in. wg)
UNIT
524A
180
240
300
360

AIRFLOW
(Cfm)

DISCHARGE
PLENUM

RETURN AIR
GRILLE

4,500
6,000
7,500
6,000
8,000
10,000
7,500
10,000
12,500
9,000
12,000
15,000

0.10
0.16
0.23
0.16
0.26
0.37
0.15
0.24
0.34
0.20
0.32
0.46

0.01
0.02
0.03
0.02
0.04
0.06
0.02
0.03
0.05
0.03
0.05
0.07

Hot Water
0.15
0.23
0.33
0.23
0.37
0.53
0.28
0.44
0.63
0.37
0.59
0.85

180
240
300
360

AIRFLOW
(Cfm)
4,500
6,000
7,500
6,000
8,000
10,000
7,500
10,000
12,500
9,000
12,000
15,000

1-ROW
STEAM*
Cap. Ldb
402
141
458
129
479
118
458
129
487
115
499
105
511
122
575
112
626
106
560
117
621
107
670
101

ECONOMIZER

Electric
0.06
0.10
0.15
0.10
0.17
0.26
0.09
0.16
0.24
0.13
0.22
0.34

0.06
0.09
0.15
0.09
0.17
0.28
0.06
0.09
0.14
0.08
0.14
0.21

524A HEATING CORRECTION FACTORS

524A HYDRONIC HEATING CAPACITIES
UNIT
524A

HEATING COILS
Steam
0.15
0.23
0.33
0.23
0.37
0.53
0.28
0.44
0.63
0.37
0.59
0.85

2-ROW HOT WATER
COIL†
Cap. Ldb Gpm
PD
412.0 145
41.2
4.5
471.0 133
47.1
5.5
529.0 125
52.9
6.6
506.0 138
50.6
5.1
584.0 128
58.4
6.3
652.0 120
65.2
7.5
649.0 140
64.9
5.7
752.0 130
75.2
7.1
842.0 122
84.2
8.5
735.0 136
73.5
6.2
850.0 126
85.0
7.8
950.0 119
95.0
9.3

Water
Temp
Drop (F)

HOT WATER COIL
Entering-Air Temp (F)
Ent Water
Temp (F)

40

50

60

70

80

140
160
180
200
220
140
160
180
200
220
140
160
180
200
220

0.72
0.89
1.06
1.22
1.39
0.64
0.81
0.98
1.15
1.32
0.56
0.74
0.91
1.08
1.25

0.64
0.81
0.98
1.15
1.32
0.57
0.74
0.91
1.08
1.25
0.49
0.66
0.83
1.00
1.18

0.57
0.74
0.90
1.07
1.24
0.49
0.66
0.83
1.00
1.17
0.41
0.58
0.76
0.93
1.10

0.49
0.66
0.83
1.00
1.17
0.41
0.58
0.75
0.93
1.10
0.33
0.51
0.68
0.85
1.03

0.41
0.58
0.75
0.92
1.09
0.33
0.51
0.68
0.85
1.02
0.24
0.43
0.60
0.78
0.95

10

20

30

LEGEND
Cap. — Capacity (Btuh in thousands)
Ldb — Leaving-Air Dry-Bulb Temp (F)
PD — Pressure Drop (ft water)
*Based on 5 psig steam, 60 F entering-air temperature. All steam coils
are non-freeze type.
†Based on 200 F entering water, 20 F water temperature drop, 60 F
entering-air temperature.
NOTES:
1. Maximum operating limits for steam heating coils:
175 psig at 400 F.
2. Maximum operating limit for hot water heating coils is 150 psig.
Capacity (Btuh)
3. Leaving db = ent db (F) +
1.1 x cfm

Steam Pressure
(psig)
0
2
5

40
1.06
1.09
1.13

STEAM COIL
Entering-Air Temp (F)
50
60
70
0.98
0.91
0.85
1.02
0.95
0.89
1.06
1.00
0.93

80
0.78
0.82
0.87

NOTE: Multiply capacity given in the Hydronic Heating Capacities table
by the correction factor for conditions at which unit is actually operating.
Correct leaving-air temperature using formula in Note 3 of Hydronic
Heating Capacities table.

4. See Heating Correction Factors table.

28

ELECTRICAL DATA
576B300-360
UNIT
576B
300
360

NOMINAL
VOLTAGE
(3 Ph, 60-Hz)
208/230
460
208/230
460

VOLTAGE
RANGE*
Min
Max
187
254
414
508
187
254
414
508

COMPRESSOR
FLA

RLA

LRA

102.2
49.8
118.4
56.2

89.8
43.6
106.5
50.0

446
223
506
253

LEGEND
FLA — Full Load Amps
HACR — Heating, Air Conditioning, and Refrigeration
ICF
— Maximum Instantaneous Current Flow during starting. (The
point in the starting sequence where the sum of the LRA for
the starting compressor, plus the total RLA for all running
compressors, plus the total FLA for all running motors is
maximum.)
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps (Complies with National Electrical
Code [NEC], Section 430-24)
MOCP — Maximum Overcurrent Protection
RLA — Rated Load Amps

FAN MOTORS
FLA
(ea)
6.2
2
3.1
6.2
2
3.1

Qty

POWER SUPPLY
MCA

MOCP†

124.6
60.7
145.5
68.7

200
100
250
110

ICF
452.2
226.1
512.2
256.1

*Units are suitable for use on electrical systems where voltage supplied to the unit terminals is not below or above the listed minimum
and maximum limits.
†Fuse or HACR circuit breaker.

576H240-360
UNIT
576H
240
300
360

NOMINAL
VOLTAGE
3 Ph, 60 Hz
208/230
460
208/230
460
208/230
460

VOLTAGE
RANGE*
Min
187
414
187
414
187
414

Max
254
508
254
508
254
508

COMPRESSOR
RLA
LRA
Ckt 1
Ckt 2
Ckt 1
Ckt 2
39.3
39.3
198
198
19.6
19.6
99
99
43.6
43.6
228
228
22.1
22.1
114
114
43.6
63.6
228
266
22.1
30.0
114
120

LEGEND
— Full Load Amps
— Maximum Instantaneous Current Flow during starting (the
point in the starting sequence where the sum of the LRA
for the starting compressor, plus the total RLA for all
running compressors, plus the total FLA for all running fan
motors is maximum).
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps (complies with National Electrical
Code [NEC], Section 430-24)
MOCP— Maximum Overcurrent Protection
RLA — Rated Load Amps
UL
— Underwriters’ Laboratories

FAN MOTORS**
Qty
2
2
2

POWER SUPPLY

FLA
(ea)

MCA

MOCP†

ICF

(1) 5.5 (2) 6.6
(1) 2.8 (2) 3.3
(1) 5.5 (2) 6.6
(1) 2.8 (2) 3.3
(1) 5.5 (2) 6.6
(1) 2.9 (2) 3.3

100.5
50.2
110.2
55.8
135.2
65.7

125
60
150
70
175
90

249.7
124.8
284.0
142.3
322.0
148.3

*Units are suitable for use on electrical systems where voltage supplied to unit terminals is not below or above listed minimum and maximum limits.
†Fuse or HACR circuit breaker.
**All fans are protected by a single circuit breaker.
NOTE: The 208/230-v, and 460-v base units are UL and UL, Canada
approved.

FLA
ICF

29

ELECTRICAL DATA (cont)
524A STANDARD MOTORS
UNIT 524A
180
240
300
360

V*-PH-Hz

VOLTAGE
LIMITS

208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60

187-253
414-506
518-632
187-253
414-506
518-632
187-253
414-506
518-632
187-253
414-506
518-632

Hp
3.7
3.7
3.0
5.0
5.0
5.0
7.5
7.5
7.5
10.0
10.0
10.0

FAN MOTOR
FLA
10.2
4.8
3.8
15.3/12.8
6.4
5.1
21.5/19.4
9.7
7.8
28.2/26.8
13.4
10.3

POWER SUPPLY
MCA
MOCP
12.8
20
6.0
15
4.8
15
19.1/16.0
30/25
8.0
15
6.4
15
28.0/24.3
50/40
12.1
20
9.8
15
35.3/33.5
60/60
16.8
30
12.9
20

524A ALTERNATE MOTORS
UNIT 524A
180
240
300

V*-PH-Hz

VOLTAGE
LIMITS

208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60

187-253
414-506
518-632
187-253
414-506
518-632
187-253
414-506
518-632

Hp
5.0
5.0
5.0
7.5
7.5
7.5
10.0
10.0
10.0

FAN MOTOR
FLA
15.3/12.8
6.4
5.1
22.5/19.4
9.7
7.8
28.2/26.8
13.4
10.3

LEGEND
FLA
— Full Load Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
*Motors are designed for satisfactory operation within 10% of nominal voltages shown.
Voltages should not exceed the limits shown in the Voltage Limits column.

30

POWER SUPPLY
MCA
MOCP
19.1/16.0
30/25
8.0
15
6.4
15
20.8/24.3
50/40
12.1
20
9.8
15
35.3/33.5
60/60
16.8
30
12.9
20

ELECTRICAL DATA (cont)
524A ELECTRIC HEATER DATA
HEATER PART NO.

UNIT

V-PH-Hz

208-3-60
CAELHEAT016A00
240-3-60
CAELHEAT017A00

480-3-60

CAELHEAT018A00

575-3-60
208-3-60

CAELHEAT019A00
240-3-60
524A180,240
CAELHEAT020A00

480-3-60

CAELHEAT021A00

575-3-60
208-3-60

CAELHEAT022A00
240-3-60
CAELHEAT023A00

480-3-60

CAELHEAT024A00

575-3-60

FAN MOTOR
Hp
3.7
5.0
7.5
3.7
5.0
7.5
3.7
5.0
7.5
3.0
5.0
7.5
3.7
5.0
7.5
3.7
5.0
7.5
3.7
5.0
7.5
3.0
5.0
7.5
3.7
5.0
7.5
3.7
5.0
7.5
3.7
5.0
7.5
3.0
5.0
7.5

kW
2.76
3.73
5.59
2.76
3.73
5.59
2.76
3.73
5.59
2.24
3.73
5.59
2.76
3.73
5.59
2.76
3.73
5.59
2.76
3.73
5.59
2.24
3.73
5.59
2.76
3.73
5.59
2.76
3.73
5.59
2.76
3.73
5.59
2.24
3.73
5.59

FLA
10.2
14.6
21.5
10.2
12.8
19.4
4.8
6.4
9.7
3.8
5.1
7.8
10.2
14.6
21.5
10.2
12.8
19.4
4.8
6.4
9.7
3.8
5.1
7.8
10.2
14.6
21.5
10.2
12.8
19.4
4.8
6.4
9.7
3.8
5.1
7.8

ELECTRIC HEATER(S)
Actual Capacity (kW)
Stage 1 Stage 2 Total
7.5
—
7.5
7.5
—
7.5
7.5
—
7.5
10.0
—
10.0
10.0
—
10.0
10.0
—
10.0
10.0
—
10.0
10.0
—
10.0
10.0
—
10.0
10.0
—
10.0
10.0
—
10.0
10.0
—
10.0
14.9
—
14.9
14.9
—
14.9
14.9
—
14.9
19.9
—
19.9
19.9
—
19.9
19.9
—
19.9
20.0
—
20.0
20.0
—
20.0
20.0
—
20.0
20.0
—
20.0
20.0
—
20.0
20.0
—
20.0
15.0
7.5
22.5
15.0
7.5
22.5
15.0
7.5
22.5
20.0
10.0
30.0
20.0
10.0
30.0
20.0
10.0
30.0
20.0
10.0
30.0
20.0
10.0
30.0
20.0
10.0
30.0
20.0
10.0
30.0
20.0
10.0
30.0
20.0
10.0
30.0

Nominal
Capacity (kW)

FLA

10
10
10
10
10
10
10
10
10
10
10
10
20
20
20
20
20
20
20
20
20
20
20
20
30
30
30
30
30
30
30
30
30
30
30
30

20.8
20.8
20.8
24.1
24.1
24.1
12.0
12.0
12.0
10.0
10.0
10.0
41.5
41.5
41.5
47.9
47.9
47.9
24.1
24.1
24.1
20.1
20.1
20.1
62.5
62.5
62.5
72.2
72.2
72.2
36.1
36.1
36.1
30.1
30.1
30.1

31

MCA*

MOCP*

38.8
41.3
52.9
42.8
46.1
54.4
21.0
23.0
27.2
17.3
19.6
22.1
64.6
70.1
78.7
72.6
75.8
84.1
36.1
39.1
43.2
29.9
31.5
34.9
90.9
96.4
105.0
103.0
106.2
114.5
51.1
53.1
57.2
42.4
44.0
47.4

40
50
60
50
50
60
25
25
30
20
20
25
70
80
80
80
80
80
40
40
50
30
35
35
100
100
110
110
110
125
60
60
60
50
50
50

ELECTRICAL DATA (cont)
524A ELECTRIC HEATER DATA (cont)
HEATER PART NO.

UNIT

V-PH-Hz

208-3-60
CAELHEAT025A00
240-3-60
524A180,240
CAELHEAT026A00

480-3-60

CAELHEAT027A00

575-3-60
208-3-60

CAELHEAT028A00
240-3-60
CAELHEAT029A00

480-3-60

CAELHEAT030A00

575-3-60
524A300,360
208-3-60

CAELHEAT031A00
240-3-60
CAELHEAT032A00

480-3-60

CAELHEAT033A00

575-3-60

FLA
Hp
MCA
MOCP

—
—
—
—

FAN MOTOR
Hp
3.7
5.0
7.5
3.7
5.0
7.5
3.7
5.0
7.5
3.0
5.0
7.5
7.5
10.0
7.5
10.0
7.5
10.0
7.5
10.0
7.5
10.0
7.5
10.0
7.5
10.0
7.5
10.0

kW
2.76
3.73
5.59
2.76
3.73
5.59
2.76
3.73
5.59
2.24
3.73
5.59
5.59
7.46
5.59
7.46
5.59
7.46
5.59
7.46
5.59
7.46
5.59
7.46
5.59
7.46
5.59
7.46

FLA
10.2
14.6
21.5
10.2
12.8
19.4
4.8
6.4
9.7
3.8
5.1
7.8
19.8
28.2
19.4
26.8
9.7
13.4
7.8
10.3
19.8
28.0
19.4
26.8
9.7
13.4
7.8
10.3

LEGEND
Full Load Amps
Horsepower
Minimum Circuit Amps
Maximum Overcurrent Protection (Amps)

FLA

MCA*

MOCP*

50
50
50
50
50
50
50
50
50
50
50
50
20
20
20
20
20
20
20
20
40
40
40
40
40
40
40
40

104.3
104.3
104.3
120.3
120.3
120.3
60.1
60.1
60.1
50.2
50.2
50.2
41.5
41.5
47.9
47.9
24.1
24.1
20.1
20.1
83.4
83.4
96.2
96.2
47.9
47.9
40.2
40.2

143.1
148.6
157.2
163.1
166.4
174.6
81.2
83.2
87.3
67.5
69.1
72.5
78.7
87.1
81.4
93.3
42.2
46.8
34.9
38.0
131.1
139.5
144.5
153.8
71.9
76.6
60.0
63.1

150
150
175
175
175
200
90
90
90
70
70
80
80
100
90
110
50
50
35
40
150
150
150
175
80
80
60
70

2. The following equation converts kW of heat energy to Btuh:
kW x 3,412 = Btuh.
3. Heater contactor coils are 24 v and require 8 va holding current.
4. Electric heaters are tested and ETL approved at maximum total
external static pressure of 1.9 in. wg.
5. MCA and MOCP values apply to both standard and alternate
factory-supplied motors.
6. Approximate shipping weight for CAELHEAT016A00-027A00 is
60 lb each. Approximate shipping weight for CAELHEAT028A00033A00 is 75 lb each.

*Values shown are for single-point connection of electric heat accessory and air handler.
NOTES:
1. Electrical resistance heaters are rated at 240 v, 480 v, or 575 v. To
determine heater capacity (kW) at unit nameplate multiply the
240-v, 480-v, or 575-v capacity (kW) by the factor shown in the
table below for the unit voltage.
HEATER
ACTUAL HEATER VOLTAGE
RATING
200
208
230
240 400 440 460 480 550
VOLTAGE
240
0.694 0.751 0.918 1
—
—
— — —
480
—
—
— — 0.694 0.84 0.918 1
—
575
—
—
— — —
—
— — 0.915

ELECTRIC HEATER(S)
Actual Capacity (kW)
Stage 1 Stage 2 Total
22.6
15.0
37.6
22.6
15.0
37.6
22.6
15.0
37.6
30.0
20.0
50.0
30.0
20.0
50.0
30.0
20.0
50.0
30.0
20.0
50.0
30.0
20.0
50.0
30.0
20.0
50.0
30.0
20.0
50.0
30.0
20.0
50.0
30.0
20.0
50.0
14.9
—
14.9
14.9
—
14.9
19.9
—
19.9
19.9
—
19.9
20.0
—
20.0
20.0
—
20.0
20.0
—
20.0
20.0
—
20.0
15.0
15.0
30.0
15.0
15.0
30.0
20.0
20.0
40.0
20.0
20.0
40.0
20.0
20.0
40.0
20.0
20.0
40.0
20.0
20.0
40.0
20.0
20.0
40.0

Nominal
Capacity (kW)

575 600
— —
— —
1 1.089

32

TYPICAL PIPING AND WIRING

LEGEND
TXV — Thermostatic Expansion Valve
Piping
*Field supplied.

NOTES:
1. All piping must follow standard refrigerant piping techniques.
2. All wiring must comply with the applicable local and national codes.
3. Wiring and piping shown are general points-of-connection guides only and are not intended
for, or to include all details for, a specific installation.
4. Liquid line solenoid valve (solenoid drop control) is recommended to prevent refrigerant
migration to the compressor.

Ground-Level Installation — 576B300,360

33

TYPICAL PIPING AND WIRING (cont)

LEGEND
LLSV — Liquid Line Solenoid Valve
NEC — National Electrical Code
TXV — Thermostatic Expansion Valve
Piping
Double Riser Piping (if required)

NOTES:
1. All piping must follow standard refrigerant piping techniques.
2. All wiring must comply with the applicable local and national codes.
3. Wiring and piping shown are general points-of-connection guides only and are not
intended for, or to include all details for, a specific installation.
4. Liquid line solenoid valve (solenoid drop control) is recommended to prevent refrigerant migration to the compressor.
5. Internal factory-supplied TXVs not shown.

*Field supplied.
†If double suction riser is required for piping
system, size pipe diameter of 3 ft (maximum) riser according to application data
on page 42.

Rooftop Installation — 576H240-360

34

TYPICAL WIRING SCHEMATIC

576B300,360

35

TYPICAL WIRING SCHEMATIC (cont)

AFS
ATS
BPR
C
CB
CH
CM
COMP
CR
EQUIP
FC
FCPS
FM
FR
FU
GND
HPS
IFC
LLSV
LPS
MM

—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Airflow Switch
Air Temperature Switch
Bypass Relay
Contactor, Compressor
Circuit Breaker
Crankcase Heater
Control Module
Compressor
Control Relay
Equipment
Fan Contactor
Fan Cycling PressureSwitch
Fan Motor
Fan Relay
Fuse
Ground
High-Pressure Switch
Indoor-Fan Contactor
Liquid Line SolenoidValve
Low-Pressure Switch
Motormaster

LEGEND
MMF
MMPT
OPS
TB
TC
TRAN

—
—
—
—
—
—

Motormaster Fuse
Motormaster Pressure Transducer
Oil Pressure Switch
Terminal Block
Thermostat-Cooling
Transformer
Terminal Block Connection
Marked Terminal
Unmarked Terminal
Marked Splice
Unmarked Splice

——

Factory Wiring
Field Control Wiring
Field Power Wiring
Indicates Common Potential,
Does Not Represent Wiring

576B300,360 (cont)

36

TYPICAL WIRING SCHEMATIC (cont)

SEE MODUPANEL™ ACCESSORY INSTALLATION FOR SCHEMATIC

576H240-360

37

TYPICAL WIRING SCHEMATIC (cont)

LEGEND
ATS
C
CB
CH
CM
COMP
COTP
CR
EQUIP
FC
FIOP
FM
FR
FU
GND
HPS
IFC
LLSV
LPS
MM
MMF
MMPT
MPR
OPS
PL

—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Air Temperature Switch
Contactor, Compressor
Circuit Breaker
Crankcase Heater
Control Module
Compressor
Compressor Overtemperature Protection
Control Relay
Equipment
Fan Contactor
Factory-Installed Option
Fan Motor
Fan Relay
Fuseblock
Ground
High-Pressure Switch
Indoor-Fan Contactor
Liquid Line SolenoidValve
Low-Pressure Switch
Motormaster
Motormaster Fuse
Motormaster Pressure Transducer
ModuPanel Relay
Oil Pressure Switch
Plug Assembly

576H240-360 (cont)

38

TB
TRAN
U
VAV

—
—
—
—

Terminal Block
Transformer
Unloader
Variable Air Volume
Plug
Receptacle
Terminal Block Connection
Marked Terminal
Unmarked Terminal
Marked Splice
Unmarked Splice
Factory Wiring
Field Control Wiring
Field Power Wiring
Indicates Common Potential,
Does Not Represent Wiring

CONTROLS
OPERATING SEQUENCE
576B300,360 — When space thermostat calls for cooling, the
no. 1 condenser fan and compressor starts after control module
(CM) initial time delay of 7 seconds. If an optional airflow switch
is used, compressor and no. 1 condensing fan will not start until
sufficient indoor airflow has closed the switch. After 7 seconds
the compressor starts and the liquid line solenoid valve
(for solenoid drop control) opens. The crankcase heater is
deenergized. If the head pressure reaches 260 psig, the second
condenser fan starts.
If cooling demand is low, suction pressure at the compressor
drops. As the pressure drops, the compressor unloads 1 or
2 banks of cylinders as required. If cooling demand is high and
1 or 2-stage operation is used, the second step of the thermostat activates the capacity control liquid line solenoid which
activates the second stage evaporator coil. The compressor
cylinders load or unload in response to compressor suction
pressure to meet evaporator load.
For two and a half minutes after the compressor starts, the
low-pressure switch (LPS) is ignored. If the LPS trips during
the first 21/2 minutes of operation, the compressor remains
operational. If a high-pressure switch (HPS) trips at any time, or
the LPS trips after 21/2 minutes, the compressor cannot restart
until the 3-minute CM anti-short cycle timer expires.
As the space cooling load is satisfied, the second stage of the
thermostat opens, and closes the field-supplied capacity control
liquid line solenoid valve to deactivate the second stage coil.
The compressor adjusts the number of active cylinders to meet
the new load. When the space temperature is satisfied, the first
stage of the thermostat opens and the control relay opens. This
closes the solenoid drop control valve. The compressor stops
and the crankcase heater is energized, preventing refrigerant
from migrating to the compressor during the off cycle (solenoid
drop refrigerant control). The CM anti-short-cycling timer is
energized and runs for approximately 3 minutes. During this
time, the compressor is not able to restart.
576H240-360 Standard Constant Volume Unit With 2-Stage
Cooling Thermostat — Seven seconds after a thermostat call
for the first stage of cooling, compressor no. 1 and the outdoor
fans start. The no. 2 fan only starts if the outdoor ambient
temperature is above 70 F. The oil-pressure switch and the
low-pressure switch are bypassed for 1 and 21/2 minutes,
respectively. If either the low-pressure switch or oil pressure
switch remain open after the delay, the unit shuts down and
goes into alarm mode. The indoor-fan motor starts immediately
whenever there is a call for cooling. If a liquid line solenoid valve
has been installed (for refrigerant control during the off cycle),
then the solenoid valve for compressor no. 1 opens immediately
upon a call for cooling.
On standard units, compressor no. 1 operates either fully
loaded or at one step of unloading, depending on the suction
pressure, which is dependent on the evaporator load conditions.
As the cooling demand increases, the thermostat calls for the
second stage of cooling. Within 7 seconds from a call for the
second stage of cooling, compressor no. 2 starts. The oil switch
and low-pressure switch for circuit no. 2 are bypassed during
start-up.
As the cooling load is satisfied, the thermostat stops the call for
the second stage of cooling, which in turn deenergizes compressor no. 2, closes the no. 2 liquid line solenoid (if installed)
and energizes the compressor no. 2 crankcase heater.
If the space temperature continues to decrease, then the thermostat stops the call for the first stage of cooling, which then
deenergizes compressor no. 1 and the outdoor fans, closes the
no. 1 liquid line solenoid valve (if installed), and energizes the
compressor no. 1 crankcase heater.

The unit controls prevent both compressors from reenergizing
within 3 minutes from a previous call for operation.
If the unit safeties trip during operation, refer to the Installation,
Start-Up and Service Instructions. To reset the lockout mode,
cycle the unit power.
NOTE: If the thermostat fan switch is in the auto position, the
indoor fan cycles on and off as the thermostat calls for cooling
(or heating). If the switch is in the continuous position, the fan
runs when the outdoor unit is powered.
576H240-360 Optional Variable Air Volume Unit With
ModuPanel™ Control — The ModuPanel control regulates up
to 10 stages of cooling to maintain a leaving-air temperature for
variable air volume (VAV) applications. When connected to one
576H condensing unit, only 6 stages are used. See the table on
page 40 for unit loading and compressor operating sequence.
When the timeclock connected to the panel closes, the
indoor-fan contactor is energized through a field-supplied relay.
(The relay must be a pilot-duty SPST relay with 115-v coil and
30 va maximum coil draw.) After the time delays programmed
into the ModuPanel control have elapsed, and with the leaving
air above the set point, the stages of mechanical cooling are
sequenced as follows:
1. Stage 1 starts compressor no. 1 with 2 banks of cylinders
unloaded (1/3 loaded). Both unloader solenoids are
energized.
2. Stage 2 loads one bank of compressor no. 1 cylinders
(2/3 loaded) by deenergizing unloader solenoid no. 1.
3. Stage 3 loads the second bank of compressor no. 1 by
deenergizing unloader solenoid no. 2.
4. Stage 4 starts compressor no. 2 and unloads 2 banks of
compressor no. 1 cylinders unloaded (1/3 loaded). Both
unloader solenoids are energized.
5. Stage 5 loads one bank of compressor no. 1 cylinders
(2/3 loaded) by deenergizing unloader solenoid no. 1.
6. Stage 6 loads one bank of compressor no. 1 cylinders (fully
loaded) by deenergizing unloader solenoid no. 2.
Two 576H240-360 Optional Variable Air Volume Units With
A Single ModuPanel Control — The ModuPanel control regulates up to 10 stages of cooling to maintain a leaving-air temperature for variable air volume (VAV) applications. When
connected to two 576H condensing units, all 10 stages are
used. See the table on page 40 for unit loading and compressor
operating sequence.
When the timeclock connected to the panel closes, the
indoor-fan contactor is energized through a field-supplied
relay. (The relay must be a pilot-duty SPST relay with 115-v coil
and 30 va maximum coil draw.) After the time delays programmed into the ModuPanel control have elapsed, and with
the leaving air above the set point, the stages of mechanical
cooling are sequenced as follows:
1. Stage 1 starts unit no. 1 compressor no. 1 with 2 banks of
cylinders unloaded (1/3 loaded). Both unloader solenoids
are energized.
2. Stage 2 loads one bank of unit no. 1 compressor no. 1 cylinders (2/3 loaded) by deenergizing unloader solenoid no. 1.
3. Stage 3 turns off unit no. 1 compressor no. 1 and starts
compressor no. 2 fully loaded.
4. Stage 4 starts unit no. 1 compressor no. 1 with 2 banks of
cylinders unloaded (1/3 loaded). Both unloader solenoids
are energized.
5. Stage 5 loads one bank of unit no. 1 compressor no. 1 cylinders (2/3 loaded) by deenergizing unloader solenoid no. 1.

39

CONTROLS (cont)
6. Stage 6 loads one bank of unit no. 1 compressor no. 1
cylinders (fully loaded) by deenergizing unloader solenoid
no. 2.
7. Stage 7 starts unit no. 2 compressor no. 1 with 2 banks of
cylinders unloaded (1/3 loaded). Both unloader solenoids
are energized.
8. Stage 8 turns off unit no. 2 compressor no. 1 and starts
compressor no. 2 fully loaded.
9. Stage 9 starts unit no. 2 compressor no. 1 with 2 banks of
cylinders unloaded (1/3 loaded). Both unloader solenoids
are energized.
10. Stage 10 loads 2 banks of unit no. 2 compressor no. 1 cylinders (fully loaded) by deenergizing both unloader solenoids.
Restart — Manual reset of the 24-v control circuit is required if
unit is shut down by any of the safety devices. Applicable

devices include the high pressure switch (HPS), low-pressure
switch (LPS), oil-pressure switch (OPS), and compressor overtemperature protection (COTP) switch. To restart the unit after
the unit has been shut down, raise the thermostat set point
above the space temperature (thereby removing the call for
cooling) and then lower the set point back to the desired setting.
If unit circuit breakers trip during unit shutdown, they must be
reset manually.
Causes of Complete Unit Shutdown:
• interruption of supplied power
• open compressor overtemperature protection (COTP)
• compressor electrical overload protection (CB1 or CB2)
• open high-pressure or low-pressure safety switches
• open oil pressure switch

576H UNIT LOADING SEQUENCE WITH MODUPANEL™ CONTROL
STAGE

NO. CYLINDERS

1
2
3
4
5
6

2
4
6
8
10
12

LOADED CYLINDERS
Compressor No. 1
Compressor No. 2
2
—
4
—
6
—
2
6
4
6
6
6

CAPACITY STEP (%)
17
33
50
67
83
100

LOADING SEQUENCE, TWO 576H CONDENSING UNITS WITH MODUPANEL CONTROL
STAGE

NO. CYLINDERS

1
2
3
4
5
6
7
8
9
10

2
4
6
8
10
12
14
18
20
24

UNIT 1 LOADED CYLINDERS
Compressor
Compressor
No. 1
No. 2
2
—
4
—
—
6
2
6
4
6
6
6
6
6
6
6
6
6
6
6

40

UNIT 2 LOADED CYLINDERS
Compressor
Compressor
No. 1
No. 2
—
—
—
—
—
—
—
—
—
—
—
—
2
—
—
6
2
6
6
6

CAPACITY STEP (%)
8
17
25
33
41
50
58
75
83
100

APPLICATION DATA — 576B300-360, 576H240-360 UNITS
INSTALLATION
Select equipment to match or to be slightly less than peak load.
This provides better humidity control, less unit cycling, and less
part-load operation.
When selecting vapor line sizes, oil return must be evaluated,
particularly at part-load conditions.
The indoor fan must always be operating when outdoor unit is
operating.
Ductwork should be sized according to unit size, not building
load.
To minimize the possibility of air recirculation, avoid the use of
concentric supply/return grilles.
Indoor equipment should be selected at no less than
300 cfm/ton.

MINIMUM OUTDOOR-AIR OPERATING TEMPERATURE
AND LOADING SEQUENCES — 576H UNITS
SYSTEM
CAPACITY
(%)

UNIT 576H

100
83
67*
50
33
17*
100
83
67*
50
33
17*
100
85
71*
43
28
14*

240

300

OPERATING LIMITS
Maximum Outdoor Ambient
Minimum Outdoor Ambient
Minimum Return-Air Temperature
Maximum Return-Air Temperature
Normal Acceptable Saturation
576B
Suction Temperature Range
576H
Maximum Discharge Temperature 576B
576H
Minimum Discharge Superheat

360

115 F
Additional head pressure
control may be required
below 35 F outdoor
ambient.
55 F
95 F
30 to 55 F
20 to 50 F
295 F
275 F
60 F

*Accessory unloader on Circuit 1.
†Motormaster® cannot be used with 2 unloaders when unit is connected to 2 separate air handlers.
NOTE: Minimum outdoor-air operating temperature is based on 90 F
saturated condensing temperature and 100% capacity.

UNLOADING SEQUENCES

MINIMUM OUTDOOR-AIR OPERATING
TEMPERATURE (F) — 576B UNITS
UNIT
576B

300

360

COMPR
CAP.
(%)

COND
TEMP
(F)

100
67
33
100
67
33

90
80
70
90
80
70

CAPACITY/STAGE (%)
CV Units
(Standard)*
100, 83, 50, 33
100, 83, 50, 33
100, 85, 43, 28

UNIT 576H
240
300
360

MIN OUTDOOR TEMP
Low
Standard
Ambient
Unit
Control
31
35
43
–20
30
34
42

LEGEND
CV — Constant Volume
*Additional unloading available with field-installed accessory unloader.
NOTE: Capacities are based on 45 F saturated suction temperature
and 95 F outdoor air temperature.

576B MAXIMUM LIQUID LIFT (FT)
UNIT 576B
300
360

MINIMUM OUTDOOR-AIR
TEMP (F)
Standard
Low Ambient
Unit
Control
–20
–20
–20†
53
–20
–20
–20†
–20
–20
–20†
50
–20
–20
–20†
–20
–20
–20†
49
–20
–20
–20†

576H MAXIMUM LIQUID LIFT (FT)

FT
76
67

UNIT 576H
240
300
360

MAXIMUM LIQUID LIFT
PER CIRCUIT (Ft)
76
73
100

WIRE SIZES FOR FIELD POWER SUPPLY
UNIT 576H

V-Ph-Hz

240-360

208-230/3/60
460-3-60

LEGEND
AWG — American Wire Gage
kcmil — Thousand Circular Mils
TB
— Terminal Block

41

FIELD POWER WIRE SIZE
TB1 WILL ACCEPT
350 kcmil
2/0 AWG

APPLICATION DATA — 576B300-360, 576H240-360 UNITS (cont)

UNIT
576B
300
360

REFRIGERANT PIPE SIZES

REFRIGERANT PIPE SIZES

SINGLE SUCTION RISERS

SINGLE SUCTION RISERS

LENGTH OF INTERCONNECTING PIPING, (Ft)
16-25
26-50
51-75
76-100
101-200
L
S
L
S
L
S
L
S
L
S
7/8
7/8
7/8
7/8
7/8
15/8
21/8*
21/8*
21/8*
21/8*
7/
7/
7/
21/8
21/8
21/8
11/8 21/8
11/8 25/8*
8
8
8

UNIT 576H
240

LEGEND
L — Liquid Line
S — Suction Line

300
360

NOTE: Liquid and suction line sizes are OD (in.)
*IMPORTANT: Requires a double suction riser, if evaporator is below condensing
unit. See table below.

LEGEND
L — Liquid Line
S — Suction Line

DOUBLE SUCTION RISERS
UNIT
576B
300
360

Ckt 1
Ckt 2
Ckt 1
Ckt 2
Ckt 1
Ckt 2

LENGTH OF INTERCONNECTING PIPING,
FOR EACH CIRCUIT (Ft)
0-25
25-50
50-75
75-100
100-200
L
S
L
S
L
S
L
S
L
S
1/2
5/8
7/8
11/8 5/8 13/8 5/8 13/8
15/8*
15/8*
1/2
5/8
7/8
11/8 5/8 13/8 5/8 13/8
15/8†
15/8†
1/
7/
7/
11/8 5/8 13/8 5/8 13/8
15/8*
21/8**
2
8
8
1/2
7/8
7/8
11/8 5/8 13/8 5/8 13/8
15/8†
21/8**
1/2
7/8
7/8
11/8 5/8 13/8 5/8 15/8*
15/8*
21/8**
1/
7/
7/
13/8 5/8 15/8 7/8 15/8
15/8
21/8†
2
8
8

*Double suction riser required if evaporator is below condensing unit and 2 unloaders are used on that circuit.
†Double suction riser required if evaporator is below condensing unit and compressor is equipped with 2 unloaders. Note the only time circuit no. 2 may be
equipped with 2 unloaders is if it is serving its own air handler and the unit does
not require low ambient operation (Motormaster® control).
**Double suction riser required if evaporator is below condensing unit and compressor has one or more unloader(s).
NOTES:
1. All line sizes are inches OD.
2. Standard unit comes with one pressure-operated unloader on circuit no. 1. If
unit serves one air handler, an additional unloader may be field installed on circuit no. 1 compressor only. If the unit serves 2 separate air handlers and low
ambient operation is required (Motormaster III control), each circuit’s compressor may only be equipped with one unloader.

LENGTH OF INTERCONNECTING PIPING, (Ft)
26-50
51-75
76-100
101-200
A
B
C
A
B
C
A
B
C
A
B
C
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8
5
1
—
—
—
—
—
—
—
—
— 1 /8 2 /8 25/8

NOTE: A, B, and C dimensions relate to reference diagram below.

DOUBLE SUCTION RISERS

UNIT 576H
A
240
300
360

Ckt 1
Ckt 2
Ckt 1
Ckt 2
Ckt 1
Ckt 2

LENGTH OF INTERCONNECTING PIPING (Ft)
50-75
75-100
100-200
B
C
A
B
C
A
B
C

—

—

—

11/8

13/8

15/8

11/8

13/8

15/8

—

—

—

11/8

13/8

15/8

13/8

13/8

15/8

—

—

—

11/8

13/8

15/8

13/8

15/8

21/8

—

—

—

11/8

13/8

15/8

13/8

15/8

21/8

11/8

13/8

15/8

11/8

13/8

15/8

13/8

15/8

21/8

—

—

—

—

—

—

13/8

15/8

21/8

NOTE: Refer to diagram below for A, B, and C dimensions.

LEGEND

A Suction Riser Without Trap
B Suction Riser With Trap
C Horizontal Suction Line to Condensing Unit
D

Short Vertical Riser:
576B300 — 15/8 in. OD
576B360 — 21/8 in. OD

576B Suction Line Piping

LEGEND
— Suction Riser without Trap
— Suction Riser with Trap
— Suction Line to Condensing Unit
— Pipe Diameter to be Same Size as Riser A

576H Suction Line Piping

42

APPLICATION DATA — 576B300-360, 576H240-360 UNITS (cont)
E-COATED COILS
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.

MULTIPLE CONDENSING UNIT ARRANGEMENTS*

Space for Service and Airflow
*For clearances between controls and grounded surfaces,
check local codes.
†Observe minimum recommended space requirements.
576B, 576H
240-360

43

DIMENSIONS (ft)
A
B
4
4

APPLICATION DATA — 524A180-360 UNITS
1. OPERATING LIMITS
Maximum fan speed — 524A180,240 . . . . . . . . . 1200 rpm
Maximum fan speed — 524A300,360 . . . . . . . . . 1100 rpm
2. GENERAL
Select equipment to match or to be slightly less than peak
load. This provides better humidity control, less unit cycling,
and less part-load operation. Equipment should be
selected to perform at no less than 300 cfm/ton.

The air handler fan must always be operating when the
condensing unit is operating.
Ductwork should be sized according to unit size, not building load. For larger units with two fans, a split duct transition
is recommended at the fan outlets, but a plenum can
be used with slight reduction in external static pressure
capability.

FACTORY-INSTALLED NOZZLE AND DISTRIBUTOR DATA
UNIT
524A

COIL
TYPE

TXV
Qty...Part No.*

DISTRIBUTOR
Qty...Part No.†

180

3 Row
4 Row
3 Row
4 Row
3 Row
4 Row
3 Row
4 Row

2...TDEBX8
2...TDEBX8
2...TDEBX11
2...TDEBX11
2...TDEBX11
2...TDEBX11
2...TDEBX16
2...TDEBX16

2...1116
2...1126
2...1116
2...1126
2...1126
2...1126
2...1126
2...1126

240
300
360

FEEDER TUBES
PER DISTRIBUTOR
Qty...Size (in.)
12...1/4
16...1/4
13...1/4
18...3/16
15...1/4
20...3/16
18...1/4
24...3/16

NOZZLE
Qty...Part No.
2...E6
2...C6
2...E8
2...C8
2...C10
2...C15
2...C12
2...C17

*Danfoss part numbers shown.
†Sporlan Valve Co. part numbers shown.
NOTE: Hot gas bypass applications require field-supplied auxiliary side connector.

STANDARD FAN MOTOR DATA

ALTERNATE FAN MOTOR DATA

208/230-3-60 AND 460-3-60 MOTORS

208/230-3-60 AND 460-3-60 MOTORS

UNIT 524A
Speed (rpm)
Hp
Frame (NEMA)
Shaft Dia (in.)

180
1725
3.7
56Y
7/
8

240
1745
5.0
S184T
11 / 8

300
1745
7.5
S213T
13/8

360
1745
10.0
S215T
13 / 8

UNIT 524A
Speed (rpm)
Hp
Frame (NEMA)
Shaft Dia (in.)

LEGEND
NEMA — National Electrical Manufacturers Association

180
1725
3.0
56HZ
7/
8

240
1745
5.0
184T
11 / 8

240
1745
7.5
S213T
13/8

300
1750
10.0
S215T
13/8

LEGEND
NEMA — National Electrical Manufacturers Association

575-3-60 MOTORS
UNIT 524A
Speed (rpm)
Hp
Frame (NEMA)
Shaft Dia (in.)

180
1745
5.0
S184T
11 / 8

575-3-60 MOTORS
300
1755
7.5
S213T
13/8

360
1755
10.0
S215T
13 / 8

UNIT 524A
Speed (rpm)
Hp
Frame (NEMA)
Shaft Dia (in.)

LEGEND
NEMA — National Electrical Manufacturers Association

180
1745
5.0
184T
11 / 8

240
1755
7.5
S213T
13/8

LEGEND
NEMA — National Electrical Manufacturers Association

44

300
1750
10.0
S215T
13/8

APPLICATION DATA — 524A180-360 UNITS (cont)
STANDARD DRIVE DATA
UNIT 524A
MOTOR DRIVE
Motor Pulley Pitch
Diameter
Pulley Factory Setting
Full Turns Open
FAN DRIVE
Pulley Pitch Dia (in.)
Pulley Bore (in.)
Belt No. — Section
Belt Pitch (in.)

HIGH-STATIC DRIVE DATA

180

240

300

360

2.8-3.8

3.7-4.7

4.3-5.3

4.3-5.3

2.5

3.0

3.0

3.0

9.0
17/16
1—A

9.4
17/16
2—B

42.3

41.8

11.0
115/16
2—B*
(2) 42.8
or
(2) 43.8

11.0
115/16
2—B*
(2) 42.8
or
(2) 43.8

UNIT 524A
MOTOR DRIVE
Motor Pulley Pitch
Diameter
Pulley Factory Setting
Full Turns Open
FAN DRIVE
Pulley Pitch Dia (in.)
Pulley Bore (in.)
Belt No. — Section
Belt Pitch (in.)
FAN SPEEDS (rpm)
Factory Setting

FAN SPEEDS (rpm)
Factory Setting
632
771
752
752
Range
537-728 679-863 682-841 674-831
Max Allowable Speed
1200
1200
1100
1100
Change per 1/2 Turn of
Moveable Motor Pulley
19.1
15.3
13.1
13.1
Flange
MAX FULL TURNS FROM
5
6
6
6
CLOSED POSITION
SHAFTS CENTER
10.449.126.676.67DISTANCE (in.)
12.32
10.99
9.43
9.43

Range
Max Allowable Speed
Change per 1/2 Turn of
Moveable Motor Pulley
Flange
MAX FULL TURNS FROM
CLOSED POSITION
SHAFTS CENTER
DISTANCE (in.)

*Four belts shipped with unit. Use one set of 2 belts sized according to
the pulley setting.

MEDIUM-STATIC DRIVE DATA
UNIT 524A
MOTOR DRIVE
Motor Pulley Pitch
Diameter
Pulley Factory Setting
Full Turns Open
FAN DRIVE
Pulley Pitch Dia (in.)
Pulley Bore (in.)
Belt No. — Section
Belt Pitch (in.)
FAN SPEEDS (rpm)
Factory Setting
Range
Max Allowable Speed
Change per 1/2 Turn of
Moveable Motor Pulley
Flange
MAX FULL TURNS FROM
CLOSED POSITION
SHAFTS CENTER
DISTANCE (in.)

180

240

300

360

3.7-4.7

4.3-5.3

4.3-5.3

4.3-5.3

3.0

3.0

3.0

3.0

8.6
17/16
1—B

9.4
17/16
2—B

41.8

41.8

9.4
115/16
2—B*
(2) 38.8
or
(2) 39.8

9.4
115/16
2—B*
(2) 38.8
or
(2) 39.8

842
881
881
881
742-943 798-984 798-984 798-984
1200
1200
1100
1100
16.7

15.3

15.3

15.3

6

6

6

6

10.4412.32

9.1610.99

6.679.43

6.679.43

*Four belts shipped with unit. Use one set of 2 belts sized according to
the pulley setting.

45

180

240

300

360

4.3-5.3

4.3-5.3

4.3-5.3

4.3-5.3

2.5

3.0

3.0

3.0

7.9
17/16
1—B
39.8

7.4
17/16
2—B
36.8

8.6
115/16
2—B
37.8

8.6
115/16
2—B
37.8

1060
9501171
1200

1118
10141200
1200

1024
8731075
1100

1024
8731075
1100

30.8

19.4

16.7

16.7

5

6

6

6

9.1610.99

8.1610.02

6.679.43

6.679.43

GUIDE SPECIFICATIONS — 576B300,360
COMMERCIAL AIR-COOLED CONDENSING UNITS
HVAC GUIDE SPECIFICATIONS
SIZE RANGE: 25 AND 30 TONS, NOMINAL
Bryant Model Number: 576B
PART 1 — GENERAL
1.01 SYSTEM DESCRIPTION
Outdoor-mounted, air-cooled condensing unit suitable for
on-the-ground or rooftop installation. Unit shall consist of a
semi-hermetic reciprocating compressor, an air-cooled
coil, propeller-type condenser fans, and a control box. Unit
shall discharge supply air upward as shown on contract
drawings. Unit shall be used in a refrigeration circuit to
match a packaged fan coil unit.
1.02 QUALITY ASSURANCE
A. Unit shall be rated in accordance with ARI Standard 365,
latest edition and shall be certified and listed in the latest
ARI directory.
B. Unit shall be manufactured in a facility registered to the
ISO 9001:2000 manufacturing quality standard.
C. Unit construction shall comply with latest edition of ANSI/
ASHRAE and with NEC.
D. Unit shall be constructed in accordance with UL
standards and shall carry the UL and UL, Canada label of
approval.
E. Unit cabinet shall be capable of withstanding 500-hour
salt spray exposure per ASTM B117 (scribed specimen).
F. Air-cooled condenser coils shall be leak tested at
150 psig and pressure tested at 450 psig.
1.03 DELIVERY, STORAGE AND HANDLING
Unit shall be shipped as single package only, and
shall be stored and handled per unit manufacturer’s
recommendations.
1.04 WARRANTY (FOR INCLUSION BY SPECIFYING
ENGINEER.)
PART 2 — PRODUCTS
2.01 EQUIPMENT
A. General:
Factory assembled, single piece, air-cooled condensing
unit. Contained within the unit enclosure shall be all
factory wiring, piping, controls, compressor, holding
charge (R-22), and special features required prior to field
start-up.
B. Unit Cabinet:
1. Unit cabinet shall be constructed of galvanized steel,
bonderized and coated with a prepainted, baked
enamel finish.
2. End unit access panel shall be hinged for compressor and control box service access.
3. Lifting holes shall be provided to facilitate rigging.
C. Fans:
1. Condenser fans shall be direct-drive propeller type,
discharging air vertically upward.
2. Condenser fan motors shall be totally enclosed,
3-phase type with class B insulation and permanently lubricated bearings.
3. Shafts shall have inherent corrosion resistance.
4. Fan blades shall be statically and dynamically
balanced.
5. Condenser fan openings shall be equipped with
PVC-coated steel wire safety guards.

D. Compressor:
1. Compressor shall be serviceable, reciprocating,
semi-hermetic type.
2. Compressor shall be equipped with an automatically
reversible oil pump, operating oil charge, suction and
discharge shutoff valves, and an insert-type, factorysized crankcase heater to control oil dilution.
3. Compressor shall be mounted on spring vibration
isolators with an isolation efficiency of no less than
95%.
4. Compressor speed shall not exceed 1750 rpm.
5. Compressor shall unload using suction cutoff unloading (electrical solenoid unloading shall be available
as an accessory).
E. Condenser Coil:
1. Condenser coil shall be air cooled, circuited for integral subcooler.
2. Coil shall be constructed of aluminum fins mechanically bonded to internally grooved, seamless copper
tubes which are then cleaned, dehydrated, and
sealed.
3. Coil shall be protected by a sheet metal casing to
eliminate the need for wind baffles for low ambient
temperature operation.
4. Coil shall be protected to avoid damage due to the
elements and vandalism.
F. Refrigeration Components:
Refrigeration circuit components shall include hot gas
muffler, high-side pressure relief device, liquid line shutoff valve, suction and discharge shutoff valves, holding
charge of refrigerant R-22, and compressor oil.
G. Controls and Safeties:
1. Minimum control functions shall include:
a. Power and control terminal blocks.
b. Three-minute anti-short-cycling timer to prevent
compressor short-cycling.
c. Lockout on auto-reset safety until reset.
d. Capacity control on the compressor shall be by
suction cutoff unloaders in response to compressor suction pressure. Electric solenoid unloading
shall be available as an accessory.
e. A 115-v solenoid shall be provided for solenoid
drop control.
f. Head pressure control to 35 F by fan cycling. One
condenser fan shall be cycled by discharge pressure to maintain proper head pressure.
g. Winter start control to prevent nuisance trip-outs
at low ambient temperatures.
2. Minimum safety devices shall include:
Automatic reset (after resetting first at control circuit
power supply)
a. High discharge-pressure cutout.
b. Low suction-pressure cutout.
c. Condenser fan motors to be protected against
overload or single-phase condition by internal
overloads.

46

GUIDE SPECIFICATIONS — 576B300,360 (cont)
Manual reset at the unit
a. Low oil-pressure cutout.
b. Compressor electrical overload protection
through the use of definite-purpose contactors
and calibrated, ambient-compensated, magnetictrip circuit breakers. Circuit breakers shall open all
3 phases in the event of an overload in any one of
the phases or a single-phase condition.
H. Operating Characteristics:
1. The capacity of the condensing unit shall meet or
Btuh at a suction temperature of
exceed
F. The power consumption at full load shall
not exceed
kW.
2. The combination of the condensing unit and the
evaporator or fan coil unit shall have a total net coolBtuh or greater at conditions
ing capacity of
cfm entering-air temperature at the evapoof:
F wet bulb and
F dry bulb, and
rator at
air entering the condensing unit at
F.
Btuh/Watt
3. The system shall have an EER of
or greater at standard ARI conditions.
I. Electrical Requirements:
1. Nominal unit electrical characteristics shall be
v, 3-ph, 60 Hz. The unit shall be capable of
satisfactory operation within voltage limits of
v
v.
to
2. Unit electrical power shall be single point connection.
3. Unit control circuit shall contain a 24-v transformer
for unit control, with capacity to operate an indoor fan
interlock.
J. Special Features:
1. Low-Ambient Control:
Control shall regulate fan motor speed in response
to the saturated condensing temperature of the unit.
The control shall be capable of maintaining a condensing temperature of 100 F ± 10° F with outdoor
temperatures at –20 F (motor change required).
2. Electric Solenoid Unloader:
Unloader valve piston, coil, and hardware shall be
supplied to convert any pressure-operated compressor unloader to 115-v electric unloading. Control box
or field-supplied step controller shall be provided for
electrical unloading.
3. Hot-Gas Bypass:
A hot-gas bypass valve and a 115-v pilot line solenoid valve shall be provided for low-load operation of
the refrigeration system.
4. Part-Winding Start:
Part-winding start shall be provided to reduce inrush
current and locked rotor amps on start-up.

5. Optional Condenser Coil Materials:
a. Pre-Coated Aluminum-Fin Coils:
Shall have a durable epoxy-phenolic coating to
provide protection in mildly corrosive coastal
environments. Coating shall be applied to the
aluminum fin stock prior to the fin stamping process to create an inert barrier between the aluminum fin and copper tube. Epoxy-phenolic barrier
shall minimize galvanic action between dissimilar
metals.
b. Copper-Fin Coils:
Shall be constructed of copper-fins mechanically
bonded to copper-tubes and copper tube sheets.
Galvanized steel tube sheets shall not be acceptable. A polymer strip shall prevent coil assembly
from contacting sheet metal coil pan to minimize
potential for galvanic corrosion between the coil
and pan. All copper construction shall provide
protection in moderate coastal environments.
c. E-Coated Aluminum-Fin Coils:
Shall have a flexible epoxy polymer coating uniformly applied to all coil surface areas without
material bridging between fins. Coating process
shall ensure complete coil encapsulation. Color
shall be high gloss black with gloss requirements
of 60° of 65 to 90% per ASTM D523-89. Uniform
dry film thickness from 0.8 to 1.2 mil on all surface
areas including fin edges. Superior hardness
characteristics of 2H per ASTM D3363-92A and
cross hatch adhesion of 4B-5B per ASTM D335993. Impact resistance shall be up to 160 in./lb
(ASTM D2794-93). Humidity and water immersion
resistance shall be up to a minimum of 1000 and
250 hours respectively (ASTM D2247-92 and
ASTM D870-92). Corrosion durability shall
be confirmed through testing to no less than
1000 hours salt spray per ASTM B117-90. Coil
construction shall be aluminum fins mechanically
bonded to copper tubes.
6. Thermostat Controls:
a. Programmable multi-stage thermostat with 7-day
clock, holiday scheduling, large backlit display,
remote sensor capability, and Title 24 compliance.
b. Commercial Electronic Thermostat with 7-day
timeclock, auto-changeover, multi-stage capability, and large LCD temperature display.
c. Non-programmable thermostat with fan switch
subbase.

47

GUIDE SPECIFICATIONS — 576H240-360
COMMERCIAL AIR-COOLED CONDENSING UNITS
HVAC GUIDE SPECIFICATIONS
SIZE RANGE: 20 TO 30 TONS, NOMINAL
Bryant Model Number: 576H
PART 1 — GENERAL
1.01 SYSTEM DESCRIPTION
A. Outdoor-mounted, air-cooled condensing unit suitable for
on-the-ground or rooftop installation. Unit shall have
2 independent refrigerant circuits. Unit shall consist of
semi-hermetic reciprocating compressors, an air-cooled
coil, propeller-type condenser fans, and a control box.
Unit shall discharge condenser air upward as shown on
contract drawings.
B. Unit shall be used in a refrigeration circuit to match a
packaged fan coil unit.
1.02 QUALITY ASSURANCE
A. Unit shall be rated in accordance with ARI Standard 365,
latest edition.
B. Systems up to 20 tons shall be certified and listed in the
latest ARI directory (ARI Standard 360).
C. Unit construction shall comply with latest edition of
ASHRAE and with NEC.
D. Unit shall be constructed in accordance with UL
standards and shall carry the UL and UL, Canada label
of approval.
E. Unit cabinet shall be capable of withstanding 500-hour
salt spray exposure per ASTM B117 (scribed specimen).
F. Air-cooled condenser coils shall be leak tested at
150 psig and pressure tested at 480 psig.
G. Unit shall be manufactured in facility registered to the
ISO 9001:2000 manufacturing quality standard.
1.03 DELIVERY, STORAGE AND HANDLING
Unit shall be shipped as single package only, and shall
be stored and handled per unit manufacturer’s
recommendations.
1.04 WARRANTY (FOR INCLUSION BY SPECIFYING
ENGINEER)
PART 2 — PRODUCTS
2.01 EQUIPMENT
A. General:
Factory-assembled, single-piece, air-cooled condensing
unit. Contained within the unit enclosure shall be all factory wiring, piping, controls, compressors, holding charge,
and special features required prior to field start-up.
B. Unit Cabinet:
1. Unit cabinet shall be constructed of galvanized steel,
bonderized and coated with a prepainted, baked
enamel finish.
2. Unit access panels shall be hinged for control box
service access.
3. Lifting holes shall be provided to facilitate rigging.
C. Fans:
1. Condenser fans shall be direct-driven propeller type,
discharging air vertically upward.
2. Condenser fan motors shall be 3-phase type with
class B insulation and permanently lubricated
bearings.
3. Shafts shall have inherent corrosion resistance.
4. Fan blades shall be statically and dynamically
balanced.

D.

E.

F.

G.

48

5. Condenser fan openings shall be equipped with
PVC-coated steel wire safety guards.
Compressors:
1. Compressors shall be serviceable, reciprocating,
semi-hermetic type.
2. Compressors shall be equipped with an automatically reversible oil pump, operating oil charge, suction and discharge shutoff valves, and an insert-type,
factory-installed crankcase heater to control oil
dilution.
3. Compressor shall be mounted on spring vibration
isolators with an isolation efficiency of no less than
95%.
4. Compressor speed shall not exceed 1750 rpm.
5. Lead compressor shall unload using pressureoperated suction cutoff unloading (electrical solenoid
unloading shall be available as an accessory).
Condenser Coil:
1. Condenser coil shall be air cooled, circuited for integral subcooler.
2. Coil shall be constructed of aluminum fins (copper
fins optional) mechanically bonded to internally
grooved, seamless copper tubes which are then
cleaned, dehydrated, and sealed.
3. Coil shall be protected by a sheet metal casing to
eliminate the need for wind baffles for low ambient
temperature operation.
4. Coil shall be protected to avoid damage due to the
elements and vandalism.
Refrigeration Components:
Refrigeration circuit components shall include hot gas
mufflers, hot gas bypass stub tubes, high-side pressure
relief devices, liquid line shut-off valves, suction and discharge shutoff valves, holding charge, and compressor
oil.
Controls and Safeties:
1. Minimum control functions shall include:
a. Power and control terminal blocks.
b. Three-minute time delay protection to prevent
compressor short-cycling.
c. Lockout on auto-reset safety until reset.
d. Capacity control on the lead compressor shall be
by suction cutoff unloaders in response to compressor suction pressure. Electric solenoid
unloading shall be available as an accessory.
e. Head pressure control to 50 F by fan cycling. One
condenser fan shall be cycled by ambient temperature to maintain proper head pressure.
2. Minimum safety devices shall include:
a. Compressor oil pressure switches.
b. High discharge-pressure cutout.
c. Compressor overtemperature cutout.
d. Low suction-pressure cutout.
e. Condenser-fan motors to be protected against
overload or single-phase condition by internal
overloads.
f. Electrical overload protection through the use of
definite-purpose contactors and calibrated, ambient-compensated, magnetic trip circuit breakers.
Circuit breakers shall open all 3 phases in the
event of an overload in any one of the phases or a
single-phase condition.

GUIDE SPECIFICATIONS — 576H240-360 (cont)
H. Operating Characteristics:
1. The capacity of the condensing unit shall meet or
Btuh at a suction temperature
exceed
of
F. The power consumption at full load
kW.
shall not exceed
2. The combination of the condensing unit and the
evaporator or fan coil unit shall have a total net coolBtuh or greater at conditions
ing capacity of
cfm entering-air temperature at the evapof:
orator at
F wet bulb and
F dry bulb,
F.
and air entering the condensing unit at
3. The system shall have an EER of
Btuh/Watt
or greater at standard ARI conditions.
I. Electrical Requirements:
1. Nominal unit electrical characteristics shall
be
v, 3-ph, 60 Hz. The unit shall be capable
of satisfactory operation within voltage limits
v to
v.
of
2. Unit electrical power shall be single-point connection.
3. Unit control circuit shall contain a 24-v transformer
for unit control, with capacity to operate an indoor-fan
interlock.
J. Special Features:
1. Low Ambient Temperature Kit:
Control shall regulate fan motor speed in response
to the saturated condensing temperature of the unit.
The control shall be capable of maintaining a condensing temperature of 100 F ± 10° F with outdoor
temperatures at –20 F.
2. Electric Solenoid Unloader:
Unloader valve piston, coil, and hardware shall be
supplied to convert any pressure-operated compressor unloader to 115-v electric unloading. Accessory
control box or field-supplied step controller shall be
provided for control of electrical unloading.
3. Pressure-Operated Unloader:
Unloader shall be available to allow compressors to
be unloaded in response to compressor suction
pressure.
4. Optional Condenser Coil Materials:
a. Pre-Coated Aluminum-Fin Coils:
Shall have a durable epoxy-phenolic coating to
provide protection in mildly corrosive coastal environments. Coating shall be applied to the aluminum fin stock prior to the fin stamping process to

create an inert barrier between the aluminum fin
and copper tube. Epoxy-phenolic barrier shall
minimize galvanic action between dissimilar
metals.
b. Copper-Fin Coils:
Shall be constructed of copper fins mechanically
bonded to copper tubes and copper tube sheets.
Galvanized steel tube sheets shall not be acceptable. All copper construction shall provide protection in moderate coastal applications.
A polymer strip shall prevent the coil assembly
from contacting the sheet metal coil pan to
minimize the potential for galvanic corrosion
between the coil and the pan. All copper construction shall provide protection in moderate coastal
environments.
c. E-Coated Aluminum-Fin Coils:
Shall be constructed of aluminum fins mechanically bonded to copper tubes. Coating process
shall have a flexible epoxy polymer coating uniformly applied to all coil surfaces without material
bridging between the fins. The coating process
shall ensure complete coil encapsulation. Color
shall be high-gloss black with gloss at 60° of 65%
to 90% per ASTM D523-89. Uniform dry film thickness shall be 0.8 mil to 1.2 mil on all surfaces,
including the fin edges. Superior hardness characteristics shall meet those requirements of 2H,
per ASTM D3363-92A. Cross-hatch adhesion
shall meet the requirements of 4B-5B, per
ASTM D3359-93. Impact resistance shall be up to
160 in./lb, per ASTM D2794-93. Humidity
resistance shall be up to a minimum of
1000 hours per ASTM D2247-92. Water immersion resistance shall be up to a minimum of
250 hours per ASTM D870-92. Durability shall be
confirmed through testing to no less than
1000 hours of salt spray per ASTM B117-90.
5. Thermostat Controls:
a. Programmable multi-stage thermostat with 7-day
clock, holiday scheduling, large backlit display,
remote sensor capability, and Title 24 compliance.
b. Commercial Electronic Thermostat with 7-day
timeclock, auto-changeover, multi-stage capability, and large LCD temperature display.
c. Non-programmable thermostat with fan switch
subbase.

49

GUIDE SPECIFICATIONS — 524A180-360
COMMERCIAL PACKAGED AIR-HANDLING UNIT
HVAC GUIDE SPECIFICATIONS
SIZE RANGE: 2,400 TO 12,000 CFM, NOMINAL AIRFLOW
15 TO 30 TONS, NOMINAL COOLING
Bryant Model Number: 524A (DIRECT-EXPANSION COIL)
PART 1 — GENERAL
1.01 SYSTEM DESCRIPTION
A. Indoor, packaged air-handling unit for use in commercial
split systems. Unit shall have a multipoise design and
shall be capable of horizontal or vertical installation on a
floor or in a ceiling, with or without ductwork. (Only vertical units are to be applied without ductwork.)
B. Unit shall have a direct-expansion coil and shall be used
in a refrigerant circuit with a matching air-cooled condensing unit.
1.02 QUALITY ASSURANCE
A. Coils shall be designed and tested in accordance with
ASHRAE 15 Safety Code for Mechanical Refrigeration,
latest edition.
B. Unit shall be constructed in accordance with ETL and
ETL, Canada standards and shall carry the ETL and ETL,
Canada labels.
C. Unit insulation and adhesive shall comply with NFPA-90A
requirements for flame spread and smoke generation.
Insulation shall contain an EPA-registered immobilized
antimicrobial agent to effectively resist the growth of bacteria and fungi as proven by tests in accordance with
ASTM standards G21 and 22.
D. Unit shall be manufactured in a facility registered to the
ISO 9001:2000 manufacturing quality standard.
E. Direct-expansion coils shall be burst tested at 435 psi and
leak tested at 150 psi.
1.03 DELIVERY AND STORAGE
Units shall be stored and handled per manufacturer’s
recommendations.
PART 2 — PRODUCTS
2.01 EQUIPMENT
Indoor mounted, draw-thru, packaged air-handling unit
that can be used in a suspended horizontal configuration
or a vertical configuration. Unit shall consist of forwardcurved belt-driven centrifugal fan(s), motor and drive
assembly, prewired fan motor contactor, factory-installed
refrigerant metering devices, cooling coil, 2-in. disposable
air filters, and condensate drain pans for vertical or horizontal configurations.
A. Base Unit:
1. Cabinet shall be constructed of mill-galvanized steel.
2. Cabinet panels shall be fully insulated with 1/2-in. fireretardant material.
3. Unit shall contain condensate drain pans for both
vertical and horizontal applications. Drain pans shall
have connections on right and left sides of unit to
facilitate field connection. Drain pans shall have the
ability to be sloped toward the right or left side of the
unit to prevent standing water from accumulating in
pans.
4. Unit shall have factory-supplied 2-in. throwaway-type
filters installed upstream from the cooling coil. Filter
access shall be from either the right or left side of the
unit.

B. Coils:
Coils shall consist of 3 rows of 3/8-in. copper tubes with
sine-wave aluminum fins bonded to the tubes by mechanical expansion. Coil tubing shall be internally rifled to
maximize heat transfer. Suction and liquid line connections shall be made on the same side of the coil. Directexpansion coils shall feature factory-installed thermostatic expansion valves (TXVs) for refrigerant control. The
TXVs shall be capable of external adjustment.
C. Operating Characteristics:
cfm airflow at
Unit shall be capable of providing
in wg.
an external static pressure of
D. Motor:
Fan motor of the size and electrical characteristics specified on the equipment schedule shall be factory supplied
and installed.
E. Special Features:
1. Alternate Motor and Drive:
An alternate motor and medium- or high-static drive
shall be available to meet the airflow and external
static pressure requirements specified on the equipment schedule.
2. High-Capacity Coil:
The high capacity coil consists of 4 rows of 3/8-in.
copper tubes with sine-wave aluminum fins bonded
to the tubes by mechanical expansion. Coil tubing
shall be internally rifled to maximize heat transfer.
Suction and liquid line connections shall be made on
the same side of the coil. Direct-expansion coils shall
feature factory-installed thermostatic expansion
valves (TXVs) for refrigerant control. The TXVs shall
be capable of external adjustment.
3. External Paint:
Where conditions require, units shall be painted with
an American Sterling Gray finish.
4. Hot Water Coil:
Coil shall be 2-row, U-bend coil with copper tubes
and aluminum plate fins bonded to the tubes by
mechanical expansion. Coil shall be mounted in a
galvanized steel housing that shall be fastened to the
unit’s fan deck for blow-thru heating operation. Coil
shall have maximum working pressure of 150 psig.
5. Steam Distributing Coil:
Coil shall consist of one row of copper tubes with
aluminum plate fins, and shall have inner steam distributing tubes. Coil shall be mounted in a galvanized
steel housing and shall be fastened to the unit’s fan
deck for blow-thru heating operation. Coil shall have
maximum working pressure of 20 psig at 260 F.
6. Electric Heaters:
Heaters for nominal 240, 480, or 575-volt, 3-phase,
60 Hz power supply shall be factory-supplied for field
installation as shown on the equipment drawings.
Electric heat assembly shall be ETL agency
approved, and shall have single-point power wiring.
Heater assembly shall include contactors with 24-v
coils, power wiring, 24-v control wiring terminal
blocks, and a hinged access panel.

50

GUIDE SPECIFICATIONS — 524A180-360 (cont)
b. Commercial Electronic Thermostat with 7-day
timeclock, auto-changeover, multi-stage capability, and large LCD temperature display.
c. Non-programmable thermostat with fan switch
subbase.
14. Condensate Drain Trap:
Trap shall have transparent, serviceable design for
easy cleaning. Kit shall include overflow shutoff
switch and wiring harness for connection to alarm if
desired.
15. UV-C Germicidal Lamps:
a. UV-C emitters and fixtures shall be specifically
designed for use inside an HVAC system. An
ASME nozzled test apparatus using a 45 F
(7.2 C) airstream moving at not less than 400 fpm
(189 liters/sec.) shall measure individual lamp
output. Lamp output at 253.7 nm shall not be less
than 10µW/cm2 per inch of arc length measured
at a distance of one meter.
b. UV-C power supplies shall be high efficiency,
electric type which are matched to the emitters
and are capable of producing the specified output
intensity with an input power no more than
80 watts.
c. Emitters and fixtures shall be installed in sufficient
quantity and arranged so as to provide an equal
distribution of UV-C energy on the coil and drain
pan.
d. The minimum UV-C energy striking the leading
edge of the coil fins shall be not less than
820 µW/cm2 at the closest point and through
placement, not less than 60% of that value at the
farthest point. Equal amounts are to strike the
drain pan, either directly or indirectly through
reflection.
e. Emitters and fixtures shall be installed at right
angles to the conforming lines of the coil fins,
such that through incident angle reflection, UV-C
energy strikes all target surfaces of the coil, drain
pan, and the available line of sight airstream.

7. Air Discharge Plenum:
Plenum shall be factory supplied to provide free-blow
air distribution for vertical floor-mounted units. A
grille with moveable vanes for horizontal or vertical
airflow adjustment shall be included. Plenum housing shall be field-installed on the unit’s fan deck for
blow-thru air distribution.
8. Return-Air Grille:
Grille shall be factory supplied for field installation on
the unit’s return air opening.
9. Unit Subbase:
Subbase assembly shall be factory supplied for field
installation. Subbase shall elevate floor-mounted
vertical units to provide access for correct condensate drain connection.
10. Economizer:
Economizer for ventilation or “free” cooling shall be
factory provided for field installation. For free cooling
applications, economizer shall be compatible with
factory-supplied thermostat; economizer dampers
shall open when outdoor air enthalpy is suitable for
free cooling. Economizer shall be compatible with
factory-supplied CO2 sensor; economizer dampers
shall open via field-supplied actuator adapter when
indoor CO2 level rises above predetermined set
point.
11. Overhead Suspension Package:
Package shall include necessary brackets to support
units in a horizontal ceiling installation.
12. CO2 Sensor:
Sensor shall provide the ability to signal the economizer to open when the space CO2 level exceeds the
predetermined set point.
13. Thermostat Controls:
a. Programmable multi-stage thermostat with 7-day
clock, holiday scheduling, large backlit display,
remote sensor capability, and Title 24 compliance.

51

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
UNIT MUST BE INSTALLED IN ACCORDANCE
WITH INSTALLATION INSTRUCTIONS

Copyright 2004 Bryant Heating & Cooling Systems

Printed in U.S.A.

7/04

Catalog No. 5257-604



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