Bryant 581J, Preferred Series Series Manual

581J

Unit shown with optional economizer and power exhaust

HIGH-EFFICIENCY GAS HEAT/ELECTRIC COOLING
PACKAGED ROOFTOP
15 to 25 NOMINAL TONS

Product Data

TM

Copyright 2018 Bryant Corporation Form PDS581J-17-28-02

TABLE OF CONTENTS

PAGE

FEATURES/BENEFITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

MODEL NUMBER NOMENCLATURE . . . . . . . . . . . . . . . 4

CAPACITY RATINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

OPTIONS AND ACCESSORIES . . . . . . . . . . . . . . . . . . . . 11

UNIT DIMENSIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

ACCESSORY DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . 28

Your new 15 to 25 Ton Preferred Series Bryant rooftop unit (RTU) was designed by customers for customers. With a newly designed
cabinet that integrates “no-strip” screw collars, handled access panels, and more we’ve made your unit easy to install, easy to main­tain, easy to use and reliable.

PERFORMANCE DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . .31

TYPICAL WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . .46

ELECTRICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . .53

APPLICATION DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

GUIDE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . .57

PAGE

Easy to install:

These new Preferred Series units are designed for dedicated factory-supplied vertical or horizontal air flow duct configurations. No
special field kits are required.

Easy to maintain:

Easy access handles by Bryant provide quick and easy access to all normally serviced components. Our “no-strip” screw system has
superior holding power and guides screws into position while preventing the screw from stripping the unit’s metal. Take accurate
pressure readings by reading system pressures with panels in place as compressors are strategically located to eliminate any air by­pass.

Easy to use:

The newly designed, central terminal board by Bryant puts all your connections and troubleshooting points in one convenient place,
standard. Most low voltage connections are made to the same board and make it easy to find what you’re looking for and easy to ac­cess it.

Reliable:

Each unit comes with precision sized and tested scroll compressor that is internally protected from over temperature and pressures. In
addition, each refrigerant circuit is further protected with a high pressure and low pressure switch as well as containing a liquid line
filter drier. Each unit is factory tested prior to shipment to help ensure unit operation once properly installed.

2

FEATURES/BENEFITS

• Two stage cooling capability with independent circuits and control.

• High performance copper tube / aluminum plate (RTPF) fin condenser and evaporator coils with optional coating.

• EER’s up to 12.0

• IEER’s up to 13.2 with single speed indoor fan motor and 13.8 with 2-speed/VFD indoor fan motor system

• Gas heating efficiencies up to 81% thermal efficiency.

• Dedicated vertical and horizontal air flow duct configuration models. No field kits required.

• Utility connections through the side or bottom. Bottom connections are also in an enclosed environment to help prevent water
entry. Field supplied couplings are required.

• Scroll compressors on all units. This makes service, stocking parts, replacement, and trouble-shooting easier.

• Precision sized TXV metering device on each refrigerant circuit.

• Easy-adjust, belt-drive motor available. Motor assembly also contains a fan belt break protection system on all models and reli­able pillow block bearing system that allows lubrication thru front of the unit.

• Single-point gas/electrical connection.

• Sloped, composite drain pan sheds water; and won’t rust.

• Standardized controls and control box layout. Standardized components and controls make stocking parts and service easier.

• Clean, large, easy to use control box.

• Color-coded wiring.

• Large, laminated wiring and power wiring drawings which are affixed to unit make troubleshooting easy.

• Single, central terminal board for test and wiring connections.

• Fast-access, handled, panels for easy access on normally accessed service panels.

• “No-strip” screw system guides screws into the panel and captures them tightly without stripping the screw, the panel, or the unit.

• Mechanical cooling (125°F to 35°F/52°C to –2°C) standard on all models. Low ambient controller allows operation down to
–20°F/–29°C

• Redundant gas valve for 2-stage gas heating capacity control with induced-draft flue exhaust design to help ensure no flue gas can
escape into the indoor air stream.

• Exclusive IGC solid state gas controller for on board diagnostics with LED error code designation, burner control logic and
energy saving indoor fan motor delay.

• 2-in. (51mm) disposable filters on all units, with 4-in. (102 mm) filter track field-installed.

• Refrigerant filter-drier on each circuit.

• High and low pressure switches. Added reliability with high pressure switch and low pressure switch.

• Many factory-installed options ranging from air management economizers, 2 position dampers, manual outdoor air dampers, plus
convenience outlets, disconnect switch and smoke detectors.

• Factory-installed Perfect Humidity™ dehumidification system.

• Standard Parts Warranty: 10 year aluminized heat exchanger, 5 year compressor, 1 year others.

• Optional 2-Speed Indoor Fan Motor System utilizes a Variable Frequency Drive (VFD) to automatically adjust the indoor fan
motor speed between cooling stages. Available on 2-stage cooling models 17-28 with electromechanical controls or RTU Open.

3

5 8 1 J E 1 7 D 3 1 0 A 1 A 0 A

Heat Level Input
200 = 220,000
310 = 310,000
400 = 400,000

1 2 3 4 5 6 7 8 9 1011121314151617

A

Outdoor Air Options

If Position 17 is A

If Position 17 is C or D

A
B

D

E

G

H

K

L

N

P
Q

= None
= Temperature Economizer, Low Leak EconoMi$er IV
w/ Barometric Relief (W7212 controller)

1

= Temperature Economizer, Low Leak EconoMi$er IV with
Centrifugal Power Exhaust (W7212 controller)

2

= Temperature Economizer, Low Leak EconoMi$er IV with
Barometric Relief and CO

2

(W7212 controller)

1

= Temeperature Economizer, Low Leak EconoMi$er IV with
Centrifugal Power Exhaust and CO

2

(W7212 controller)

2

= Enthalpy Economizer, Low Leak EconoMi$er IV with
Barometric Relief (W7212 controller)

1

= Enthalpy Economizer, Low Leak EconoMi$er IV with
Centrifugal Power Exhaust (W7212 controller)

2

= Enthalpy Economizer, Low Leak EconoMi$er with
Barometric relief and CO

2

(W7212 controller)

1

= Enthalpy Economizer, Low Leak EconoMi$er IV with
Centrifugal Power Exhaust CO

2

(W7212 controller)

2

= Manual Outdoor Air Damper1
= Motorized 2-Position Damper

1

A
B

D

E

G

H

K

L

N

U

V

W

X

= None
= Temperature Economizer, Low Leak EconoMi$er X with
Barometric Relief (W7220 controller)

1

= Temperature Economizer, Low Leak EconoMi$er X with
Centrifugal Power Exhaust (W7220 controller)

2

= Temperature Economizer, Low Leak EconoMi$er X with
Barometric Relief and CO

2

(W7220 controller)

1

= Temperature Economizer, Low Leak EconoMi$er X, with
Centrifugal Power Exhaust and CO

2

(W7220 controller)

2

= Enthalpy Economizer, Low Leak EconoMi$er X with
Barometric Relief (W7220 controller)

1

= Enthalpy Economizer, Low Leak EconoMi$er X with
Centrifugal Power Exhaust (W7220 controller)

2

= Enthalpy Economizer, Low Leak EconoMi$er X with
Barometric Relief and CO

2

(W7220 controller)

1

= Enthalpy Economizer, Low Leak with Centrifugal
Power Exhaust and CO

2

(W7220 controller)

2

= Ultra LOW LEAK Temperature EconoMi$er X with
Barometric Relief (W7220 controller)

1

= Ultra LOW LEAK Temperature EconoMi$er X with
Centrifugal Power Exhaust (W7220 controller)

2

= Ultra LOW LEAK Enthalpy EconoMi$er X with
Barometric Relief (W7220 controller)

1

= Ultra LOW LEAK Enthalpy EconoMi$er X with
Centrifugal Power Exhaust (W7220 controller)

2

1. Vertical and Horizontal Air Flow

2. Vertical Air Flow Only

Unit Type
581 = High Efficiency
Gas Heat RTU

Model
J (Puron

®

Refrigerant)

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

Cooling Tons
17 = 15 ton
20 = 17.5 ton
24 = 20 ton
28 = 25 ton

Refrig. System/Gas Heat Options
D = Two stage compressor Model
F = Two stage compressor Model and Stainless steel
gas heat exchanger
K = Two stage cooling with aluminum gas heat
exchanger and Perfect Humidity
M = Two stage cooling with stainless steel gas heat
exchanger and Perfect Humidity

Coil Options (Outdoor — Indoor — Hail Guard)
A = Al/CU - Al/Cu
B = Precoat Al/Cu - Al/Cu
C = E-coat Al/Cu - Al/Cu
D = E-coat Al/Cu - E-coat Al/Cu
E = Cu/Cu - Al/Cu
F = Cu/Cu - Cu/Cu
M = Al/Cu - Al/Cu – Louvered Hail Guard
N = Precoat Al/Cu - Al/Cu – Louvered Hail Guard
P = E-coat Al/Cu - Al/Cu – Louvered Hail Guard
Q = E-coat Al/Cu - E-coat Al/Cu – Louvered Hail Guard
R = Cu/Cu - Al/Cu – Louvered Hail Guard
S = Cu/Cu - Cu/Cu – Louvered Hail Guard

Indoor Fan Options
1 = Standard Static Option, Vertical
2 = Medium Static Option, Vertical
3 = High Static Option, Vertical
B = Medium Static, High Effy Motor, Vertical
C = High Static, High Effy Motor, Vertical

5 = Standard Static Option, Horizontal
6 = Medium Static Option, Horizontal
7 = High Static Option, Horizontal
F = Medium Static, High Effy Motor, Horizontal
G = High Staic, High Effy Motor, Horizontal

Packaging, Controls & Indoor Fan Motor
Speed Options
A = Standard Packaging, electro mech. controls that
require W7212 EconoMi$er IV
C = Standard Packaging, electro mech. controls that
require W7220 EconoMi$er X
D = Standard Packaging and 2-Speed Indoor Fan Motor
(VFD) Controller

Factory Installed Options
0A = None

MODEL NUMBER NOMENCLATURE

4

581J MODEL NUMBER NOMENCLATURE

CAPACITY RATINGS

AHRI RATINGS (2-STAGE COOLING)

581J UNIT CONFIGURATION

17

20

24

28

LEGEND

AHRI — Air-Conditioning, Heating and Refrigeration Institute
EER — Energy Efficiency Ratio
IEER — Integrated Energy Efficiency Ratio

NOTE: 581J**28 horizontal units are only available with a 2-speed
option.

Vertic al

Horizontal 15.1 11.5 12.2 13.0

Vertic al

Horizontal 17.9 11.3 11.5 13.2

Vertic al

Horizontal 20.4 11.4 12.0 13.0

Vertic al

Horizontal 26.9 10.5 N/A 12.2

NOM. CAPACITY

(TONS)

15.0 174

17.5 202

20.0 232

25.0 282

NET COOLING

CAPACITY (MBH)

SOUND RATINGS TABLE

581J UNIT

17 2 84.1 96.2 84 92.6 92.0 84.0 80.0 82.0 78.7 76.5 72.2 65.4

20 2 84.1 96.2 84 92.6 92.0 84.0 80.0 82.0 78.7 76.5 72.2 65.4

24 2 86.5 99.6 87 96.2 95.6 87.5 84.2 84.2 81.7 77.9 73.2 66.3

28 2 85.9 103.0 86 101.0 97.0 88.0 84.0 83.0 80.7 77.4 73.4 67.3

LEGEND

dB — Decibel

NOTES:

1. Outdoor sound data is measured in accordance with AHRI.

2. Measurements are expressed in terms of sound power. Do not
compare these values to sound pressure values because sound

COOLING

STAGES

A-WEIGHTED LINEAR

AHRI-370

RATING

TOTAL POWER

(kW)

14.5 12.0 13.0 13.5

16.8 12.0 13.0 13.6

19.3 12.0 13.2 13.8

25.2 11.2 12.0 12.5

OUTDOOR SOUND (dB) AT 60Hz

31.5 63 125 250 500 1000 2000 4000 8000

pressure depends on specific environmental factors which nor­mally do not match individual applications. Sound power values
are independent of the environment and therefore more accurate.

3. A-weighted sound ratings filter out very high and very low fre­quencies, to better approximate the response of “average” human
ear. A-weighted measurements for Bryant units are taken in
accordance with AHRI.

EER

IEER

(Single Speed)

IEER (2-Speed)

581J
UNIT

17

20

24

28

MINIMUM - MAXIMUM AIRFLOW RATINGS (CFM) — NATURAL GAS AND PROPANE

COOLING

HEAT

LEVEL

LOW
MED 3,880 7,750 3,880 7,750

HIGH 4,620 8,570 4,620 8,570

LOW
MED 3,880 9,300 3,880 9,300

HIGH 4,620 10,000 4,620 10,000

LOW
MED 3,880 11,630 3,880 11,630

HIGH 4,620 10,000 4,620 10,000

LOW
MED 3,880 15,500 3,880 15,500

HIGH 4,620 15,000 4,620 15,000

MINIMUM

SINGLE SPEED

FAN MOTOR

4,500 5,070 3,380 7,500

5,250 5,915 3,943 9,000

6,000 7,500 5,000 10,000

7,500 8,450 5,633 12,500

MINIMUM

2-SPEED FAN

MOTOR (AT

HIGH SPEED)

MINIMUM

2-SPEED FAN

MOTOR (AT

LOW SPEED)

MAXIMUM MINIMUM MAXIMUM MINIMUM MAXIMUM

ALUMINUM HEATING STAINLESS STEEL HEATING

3,000 8,250 3,000 8,250

3,000 11,000 3,000 11,000

3,000 11,000 3,000 11,000

3,000 16,500 3,000 16,500

5

CAPACITY RATINGS (cont)

HEAT RATING TABLE — NATURAL GAS AND PROPANE

581J UNIT GAS HEAT

17

20

24

28

NOTES:

1. Heat ratings are for natural gas heat exchangers operated at or
below 2000 ft (610 m). For information on Propane or altitudes
above 2000 ft (610 m), see the Application Data section of this
book. Accessory Propane/High Altitude kits are also available.

LOW 220/178 176/142 20-55

HIGH 400/324 320/260 35-65

LOW 220/178 176/142 15-55

HIGH 400/324 320/260 30-65

LOW 220/178 176/142 15-55

HIGH 400/324 320/260 30-65

LOW 220/178 176/142 10-55

HIGH 400/324 320/260 20-65

AL/SS HEAT EXCHANGER

INPUT/OUTPUT

STAGE 1 (MBH)

INPUT/OUTPUT
STAGE 2 (MBH)

2. In the USA the input rating for altitudes above 2000 ft (610 m)
must be derated by 4% for each 1000 ft (305 m) above sea level.
In Canada, the input rating must be derated by 10% for altitudes of
2000 ft (610 m) to 4500 ft (1372 m) above sea level.

TEMPERATURE RISE

(F)

THERMAL EFFICIENCY

(%)

81%MED 310/251 248/200 30-60

81%MED 310/251 248/200 25-60

81%MED 310/251 248/200 20-60

81%MED 310/251 248/200 15-60

6

PHYSICAL DATA

581J 15 TO 25 TON PHYSICAL DATA

581J UNIT 581J*17D 581J*20D 581J*24D 581J*28D

581J BASE UNIT TONS 15 15 17.5 17.5 20 20 25 25

581J BASE UNIT WEIGHT - lb
(kg)

REFRIGERATION SYSTEM

# Circuits / # Comp. / Type 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll

R-410A Charge A/B (lbs) 17/16.4 24.5/25.7 17.5/16.8 25.5/25.5 23.8/23.1 30.0/30.7 24.9/27.7 35.1/35.4

Metering device TXV TXV TXV TXV TXV TXV TXV TXV

High-Pressure Trip / Reset
(psig)

Low-Pressure Trip / Reset
(psig)

EVAPORATOR COIL

Material Cu / Al Cu / Al Cu / Al Cu / Al Cu / Al Cu / Al Cu / Al Cu / Al

Tube Diameter (in.)

Rows / FPI 4 / 15 4 / 15 4 / 15 4 / 15 4 / 15 4 / 15 4 / 15 4 / 15

2

Total Face Area (ft

Condensate Drain Connec­tion Size (in.)

) 22 22 22 22 26 26 26 26

PERFECT HUMIDITY™ COIL

Material

Tube Diameter

Rows / FPI 1 / 17 1 / 17 1 / 17 1 / 17

2

Total Face Area (ft

EVAPORATOR FAN AND
MOTOR VERTICAL SUPPLY

Motor Qty / Belt Qty /
Driver Type

Nominal /
Nameplate hp

) 22 22 26 26

Max bhp 2.9 2.9 3.7 3.7 N/A N/A 4.9 4.9

Rpm Range 514-680 514-680 622-822 622-822 N/A N/A 717-911 717-911

Max Blower/Shaft rpm 1200 1200 1200 1200 N/A N/A 1200 1200

Motor Frame Size 56 56 56 56 N/A N/A 56 56

STANDARD STATIC

Fan Qty / Type 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal N/A N/A 2 / Centrifugal 2 / Centrifugal

Fan Diameter (in.) 15 X 15 15 X 15 15 X 15 15 X 15 N/A N/A 15 X 15 15 X 15

Motor Qty / Belt Qty /
Driver Type

Nominal /
Nameplate hp

Max bhp 3.7 3.7 4.9 4.9 N/A N/A N/A N/A

Rpm Range 679-863 679-863 713-879 713-879 N/A N/A N/A N/A

Max Blower/Shaft rpm 1200 1200 1200 1200 N/A N/A N/A N/A

Motor Frame Size 56 56 56 56 N/A N/A N/A N/A

MEDIUM STATIC

Fan Qty / Type 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal N/A N/A N/A N/A

Fan Diameter (in.) 15 X 15 15 X 15 15 X 15 15 X 15 N/A N/A N/A N/A

Motor Qty / Belt Qty /
Driver Type

Nominal /
Nameplate hp

Max bhp 4.9 4.9 N/A N/A N/A N/A N/A N/A

Rpm Range 826-1009 826-1009 N/A N/A N/A N/A N/A N/A

Max Blower/Shaft rpm 1200 1200 N/A N/A N/A N/A N/A N/A

HIGH STATIC

Motor Frame Size 56 56 N/A N/A N/A N/A N/A N/A

Fan Qty / Type 2 / Centrifugal 2 / Centrifugal N/A N/A N/A N/A N/A N/A

Fan Diameter (in.) 15 X 15 15 X 15 N/A N/A N/A N/A N/A N/A

1892 (858) 2102 (953) 2247 (1019) 2292 (1040)

630 / 505 630 / 505 630 / 505 630 / 505 630 / 505 630 / 505 630 / 505 630 / 505

54 / 117 27 / 44 54 / 117 27 / 44 54 / 117 27 / 44 54 / 117 27 / 44

3

/8 RTPF

3

/

—

4

3

/8 RTPF

3

/

Cu / Al

3

/8 RTPF

3

/8 RTPF

3

4

/

4

—

3

/8 RTPF

3

/

Cu / Al

3

/8 RTPF

3

/8 RTPF

3

4

/

4

—

3

/8 RTPF

3

/

Cu / Al

3

/8 RTPF

3

/8 RTPF

3

4

/

4

3

/8 RTPF

Cu / Al

3

—

/8 RTPF

1 / 1 /Belt 1 / 1 /Belt 1 / 1 /Belt 1 / 1 /Belt N/A N/A 1 / 1 /Belt 1 / 1 /Belt

2.9 2.9 3.7 3.7 N/A N/A 5.25 5.25

1 / 1 /Belt 1 / 1 /Belt 1 / 1 /Belt 1 / 1 /Belt N/A N/A N/A N/A

3.7 3.7 5.25 5.25 N/A N/A N/A N/A

1 / 1/ BELT 1 / 1/ BELT N/A N/A N/A N/A N/A N/A

5.25 5.25 N/A N/A N/A N/A N/A N/A

3

/

4

7

PHYSICAL DATA (cont)

581J 15 TO 25 TON PHYSICAL DATA (CONT)

581J UNIT 581J*17D 581J*20D 581J*24D 581J*28D

EVAPORATOR FAN AND
MOTOR VERTICAL SUPPLY
(CONT)

Motor Qty / Belt Qty /
Driver Type

Nominal /
Nameplate hp

Max bhp N/A N/A N/A N/A

Rpm Range N/A N/A N/A N/A 690-863 690-863 N/A N/A

Max Blower/Shaft rpm N/A N/A N/A N/A 1200 1200 N/A N/A

Motor Frame Size N/A N/A N/A N/A 184T 184T N/A N/A

Fan Qty / Type N/A N/A N/A N/A 2 / Centrifugal 2 / Centrifugal N/A N/A

Fan Diameter (in.) N/A N/A N/A N/A 15 X 15 15 X 15 N/A N/A

STANDARD STATIC - HIGH EFFCY

Motor Qty / Belt Qty /
Driver Type

Nominal /
Nameplate hp

Max bhp N/A N/A N/A N/A

Rpm Range N/A N/A N/A N/A 835-1021 835-1021 913-1116 913-1116

Max Blower/Shaft rpm N/A N/A N/A N/A 1200 1200 1200 1200

Motor Frame Size N/A N/A N/A N/A 184T 184T 184T 184T

Fan Qty / Type N/A N/A N/A N/A 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal

N/A N/A N/A N/A 1 / 1 /Belt 1 / 1 /Belt N/A N/A

N/A N/A N/A N/A 5.0 5.0 N/A N/A

6.5/ 6.9/ 7.0/

8.3

N/A N/A N/A N/A 1 / 1/ Belt 1 / 1/ Belt 1 / 1/ Belt 1 / 1/ Belt

N/A N/A N/A N/A 5.0 5.0 5.0 5.0

6.5/ 6.9/ 7.0/

8.3

6.5/ 6.9/ 7.0/

8.3

6.5/ 6.9/ 7.0/

8.3

N/A N/A

6.5/ 6.9/ 7.0/

8.3

6.5/ 6.9/ 7.0/

8.3

Fan Diameter (in.) N/A N/A N/A N/A 15 X 15 15 X 15 15 X 15 15 X 15

MEDIUM STATIC - HIGH EFFICIENCY

Motor Qty / Belt Qty /
Driver Type

Nominal Nameplate
H.p.

Max Bhp (208/230/460/
575v)

Rpm Range N/A N/A 882-1078 882-1078 941-1176 941-1176 941-1176 941-1176

Max Blower/shaft Rpm N/A N/A 1200 1200 1200 1200 1200 1200

EFFICIENCY

Motor Frame Size N/A N/A 184T 184T 213T 213T 213T 213T

HIGH STATIC- HIGH

Fan Qty / Type N/A N/A 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal

Fan Diameter (In) N/A N/A 15 X 15 15 X 15 15 X 15 15 X 15 15 X 15 15 X 15

EVAPORATOR FAN AND
MOTOR HORIZONTAL SUPPLY

Motor Qty / Belt Qty /
Driver Type

Nominal /
Nameplate hp

Max bhp 2.9 2.9 3.7 3.7 N/A N/A N/A N/A

Rpm Range 514-680 514-680 622-822 622-822 N/A N/A N/A N/A

Max Blower/Shaft rpm 1100 1100 1100 1100 N/A N/A N/A N/A

Motor Frame Size 56 56 56 56 N/A N/A N/A N/A

STANDARD STATIC

Fan Qty / Type 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal N/A N/A N/A N/A

Fan Diameter (in.) 18 x 15/15 X 11 18 x 15/15 X 11 18 x 15/15 X 11 18 x 15/15 X 11 N/A N/A N/A N/A

Motor Qty / Belt Qty /
Driver Type

Nominal /
Nameplate hp

Max bhp 3.7 3.7 4.9 4.9 N/A N/A N/A N/A

Rpm Range 614-780 614-780 713-879 713-879 N/A N/A N/A N/A

Max Blower/Shaft rpm 1100 1100 1100 1100 N/A N/A N/A N/A

Motor Frame Size 56 56 56 56 N/A N/A N/A N/A

MEDIUM STATIC

Fan Qty / Type 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal N/A N/A N/A N/A

Fan Diameter (in.) 18 x 15/15 X 11 18 x 15/15 X 11 18 x 15/15 X 11 18 x 15/15 X 11 N/A N/A N/A N/A

N/A N/A 1 / 1 /Belt 1 / 1 /Belt 1 / 1 /Belt 1 / 1 /Belt 1 / 1 /Belt 1 / 1 /Belt

N/A N/A 5.0 5.0 7.5 7.5 7.5 7.5

N/A N/A

1 / 1 /Belt 1 / 1 /Belt 1 / 1 /Belt 1 / 1 /Belt N/A N/A N/A N/A

2.9 2.9 3.7 3.7 N/A N/A N/A N/A

1 / 1 /Belt 1 / 1 /Belt 1 / 1 /Belt 1 / 1 /Belt N/A N/A N/A N/A

3.7 3.7 5.25 5.25 N/A N/A N/A N/A

6.5/ 6.9/ 7.0/

8.3

6.5/ 6.9/ 7.0/

8.3

10.5/11.9/11.9/1110.5/11.9/11.9/1110.5/11.9/11.9/1110.5/11.9/11.9/
11

8

581J 15 TO 25 TON PHYSICAL DATA (CONT)

581J UNIT 581J*17D 581J*20D 581J*24D 581J*28D

Motor Qty / Belt Qty /
Driver Type

Nominal /
Nameplate hp

Max bhp 4.9 4.9 N/A N/A N/A N/A N/A N/A

Rpm Range 746-912 746-912 N/A N/A N/A N/A N/A N/A

Max Blower/Shaft rpm 1100 1100 N/A N/A N/A N/A N/A N/A

HIGH STATIC

Motor Frame Size 56 56 N/A N/A N/A N/A N/A N/A

Fan Qty / Type 2 / Centrifugal 2 / Centrifugal N/A N/A N/A N/A N/A N/A

Fan Diameter (in.) 18 x 15/15 X 11 18 x 15/15 X 11 N/A N/A N/A N/A N/A N/A

Motor Qty / Belt Qty /
Driver Type

Nominal /
Nameplate hp

Max bhp N/A N/A N/A N/A

Rpm Range N/A N/A N/A N/A 690-863 690-863 N/A N/A

Max Blower/Shaft rpm N/A N/A N/A N/A 1200 1200 N/A N/A

EFFICIENCY

Motor Frame Size N/A N/A N/A N/A 184T 184T N/A N/A

Fan Qty / Type N/A N/A N/A N/A 2 / Centrifugal 2 / Centrifugal N/A N/A

STANDARD STATIC - HIGH

Fan Diameter (in.) N/A N/A N/A N/A 18 x 15/15 X 11 18 x 15/15 X 11 N/A N/A

Motor Qty / Belt Qty /
Driver Type

Nominal /
Nameplate hp

Max bhp N/A N/A N/A N/A

Rpm Range N/A N/A N/A N/A 835-1021 835-1021 755-923 755-923

Max Blower/Shaft rpm N/A N/A N/A N/A 1100 1100 1100 1100

EFFICIENCY

Motor Frame Size N/A N/A N/A N/A 184T 184T 184T 184T

MEDIUM STATIC - HIGH

Fan Qty / Type N/A N/A N/A N/A 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal

Fan Diameter (in.) N/A N/A N/A N/A 18 x 15/15 X 11 18 x 15/15 X 11 18 x 15/15 X 11 18 x 15/15 X 11

Motor Qty / Belt Qty /
Driver Type

Nominal /
Nameplate hp

Max bhp N/A N/A

Rpm Range N/A N/A 835-1021 835-1021 941-1100 941-1100 906-1100 906-1100

Max Blower/Shaft rpm N/A N/A 1100 1100 1100 1100 1100 1100

EFFICIENCY

Motor Frame Size N/A N/A 184T 184T 213T 213T 213T 213T

HIGH STATIC- HIGH

Fan Qty / Type N/A N/A 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal 2 / Centrifugal

Fan Diameter (in.) N/A N/A 18 x 15/15 X 11 18 x 15/15 X 11 18 x 15/15 X 11 18 x 15/15 X 11 18 x 15/15 X 11 18 x 15/15 X 11

COND. COIL (CIRCUIT A)

Coil Type RTPF RTPF RTPF RTPF RTPF RTPF RTPF RTPF

Coil Length (in.) 70 70 72 72 82 82 95 95

Coil Height (in.) 44 44 44 44 52 52 52 52

Rows / fpi 2 /17 2 /17 2 /17 2 /17 2 /17 2 /17 2 /17 2 /17

2

Total Face Area (Ft

) 21.4 21.4 22.0 22.0 29.6 29.6 34.3 34.3

COND. COIL (CIRCUIT B)

Coil Type RTPF RTPF RTPF RTPF RTPF RTPF RTPF RTPF

Coil Type 70 70 64 64 80 80 95 95

Coil Length (in.) 44 44 44 44 52 52 52 52

Coil Height (in.) 2 /17 2 /17 2 /17 2 /17 2 /17 2 /17 2 /17 2 /17

Rows / fpi 21.4 21.4 19.5 19.5 29.6 29.6 34.3 34.3

COND. FAN / MOTOR

Qty / Motor Drive Type 3 / direct 3 / direct 4 / direct 4 / direct 4/ direct 4/ direct 6 / direct 6 / direct

Motor Hp / Rpm

Fan Diameter (in.) 22 22 22 22 22 22 22 22

FILTERS

RA Filter # / Size (in.) 6 / 20 x 25 x 2 6 / 20 x 25 x 2 6 / 20 x 25 x 2 6 / 20 x 25 x 2 9 / 16 x 25 x 2 9 / 16 x 25 x 2 9 / 16 x 25 x 2 9 / 16 x 25 x 2

OA Inlet Screen # / Size (in.) 4 / 16 x 25 x 1 4 / 16 x 25 x 1 4 / 16 x 25 x 1 4 / 16 x 25 x 1 4 / 16 x 25 x 1 4 / 16 x 25 x 1 4 / 16 x 25 x 1 4 / 16 x 25 x 1

1 / 1 /Belt 1 / 1 /Belt N/A N/A N/A N/A N/A N/A

4.9 4.9 N/A N/A N/A N/A N/A N/A

N/A N/A N/A N/A 1 / 1 /Belt 1 / 1 /Belt N/A N/A

N/A N/A N/A N/A 5.0 5.0 N/A N/A

6.5/ 6.9/ 7.0/

8.3

6.5/ 6.9/ 7.0/

8.3

N/A N/A

N/A N/A N/A N/A 1 / 1 /Belt 1 / 1 /Belt 1 / 1 /Belt 1 / 1 /Belt

N/A N/A N/A N/A 5.0 5.0 5.0 5.0

6.5/ 6.9/ 7.0/

8.3

6.5/ 6.9/ 7.0/

8.3

6.5/ 6.9/ 7.0/

8.3

6.5/ 6.9/ 7.0/

N/A N/A 1 / 1 /Belt 1 / 1 /Belt 1 / 1 /Belt 1 / 1 /Belt 1 / 1 /Belt 1 / 1 /Belt

N/A N/A 5.0 5.0 7.5 7.5 7.5 7.5

1

/4 / 1100

1

/4 / 1100

6.5/ 6.9/ 7.0/

8.3

1

/4 / 1100

6.5/ 6.9/ 7.0/

8.3

1

/4 / 1100

10.5/11.9/11.9/1110.5/11.9/11.9/1110.5/11.9/11.9/1110.5/11.9/11.9/

1

/4 / 1100

1

/4 / 1100

1

/4 / 1100

1

/4 / 1100

8.3

11

9

PHYSICAL DATA (cont)

581J 15 TO 25 TON PHYSICAL DATA (CONT)

581J UNIT 581J*17D 581J*20D 581J*24D 581J*28D

GAS CONNECTION

Number of Gas Valves 1111

Nat. gas supply line press
(in. wg) / (PSIG)

LP supply line press (in. wg) /
(PSIG)

HEAT ANTICIPATOR SETTING
(AMPS)

1st stage 0.14 0.14 0.14 0.14

2nd stage 0.14 0.14 0.14 0.14

NATURAL GAS HEAT

# of stages / # of burners
(total)

Connection Size (in.)

LOW

Rollout switch opens /
closes (F)

Temperature Rise (F) 25 - 55 25 - 55 25 - 55 25 - 55

# of stages / # of burners
(total)

Connection Size (in.)

MED

Rollout switch opens /
closes (F)

Temperature Rise (F) 30- 60 30- 60 30- 60 30- 60

# of stages / # of burners
(total)

Connection Size (in.)

HIGH

Rollout switch opens /
closes (F)

Temperature Rise (F) 35- 65 35- 65 35- 65 35- 65

LIQUID PROPANE HEAT

# of stages / # of burners
(total)

Connection Size (in.)

LOW

Rollout switch opens /
closes (F)

Temperature Rise (F) 25 - 55 25 - 55 25 - 55 25 - 55

# of stages / # of burners
(total)

Connection Size (in.)

MED

Rollout switch opens /
closes (F)

Temperature Rise (F) 30- 60 30- 60 30- 60 30- 60

# of stages / # of burners
(total)

Connection Size (in.)

HIGH

Rollout switch opens /
closes (F)

Temperature Rise (F) 35- 65 35- 65 35- 65 35- 65

5 -13 / 0.18-0.47 5 -13 / 0.18-0.47 5 -13 / 0.18-0.47 5 -13 / 0.18-0.47

11-13 / 0.40-0.47 11-13 / 0.40-0.47 11-13 / 0.40-0.47 11-13 / 0.40-0.47

2 / 5 2 / 5 2 / 5 2 / 5

3

/4 NPT

3

/4 NPT

3

/4 NPT

3

/4 NPT

195 / 115 195 / 115 195 / 115 195 / 115

2 / 7 2 / 7 2 / 7 2 / 7

3

/4 NPT

3

/4 NPT

3

/4 NPT

3

/4 NPT

195 / 115 195 / 115 195 / 115 195 / 115

2 / 10 2 / 10 2 / 10 2 / 10

3

/4 NPT

3

/4 NPT

3

/4 NPT

3

/4 NPT

195 / 115 195 / 115 195 / 115 195 / 115

2 / 5 2 / 5 2 / 5 2 / 5

3

/4 NPT

3

/4 NPT

3

/4 NPT

3

/4 NPT

195 / 115 195 / 115 195 / 115 195 / 115

2 / 7 2 / 7 2 / 7 2 / 7

3

/4 NPT

3

/4 NPT

3

/4 NPT

3

/4 NPT

195 / 115 196 / 115 197 / 115 198 / 115

2 / 10 2 / 10 2 / 10 2 / 10

3

/4 NPT

3

/4 NPT

3

/4 NPT

3

/4 NPT

195 / 115 195 / 115 195 / 115 195 / 115

10

OPTIONS AND ACCESSORIES

ITEM OPTION* ACCESSORY

CABINET

Dedicated Vertical Air Flow Duct
Configuration

Dedicated Horizontal Air Flow
Duct Configuration

Hinged Access Panels

COIL OPTIONS

Cu/Cu (Indoor) Coils

Premium, E-coated Outdoor Coils

Pre-coated (outdoor and indoor)
Coils

HUMIDITY CONTROL

Perfect Humidity™ Adaptive
Dehumidification

System

CONDENSER PROTECTION

Condenser Coil Louvered Hail
Guard

CONTROLS

RTU Open Multi-Protocol
Controller

Thermostats, Temperature
Sensors, and Subbase

Smoke Detector (Supply and/or
Return Air)

Horn/Strobe Annunciator

Time Guard II Compressor Delay
Control Circuit

Phase Monitor

ECONOMIZERS AND OUTDOOR
AIR DAMPERS

Economi$er IV for Electro­Mechanical Controls — Non-FDD
(Standard Air Leak Damper
Models)

EconoMi$er
(Standard and
Damper Models)

EconoMi$er X For Electro­Mechanical Controls, Complies
with
Leak air damper models)

Motorized 2 Position

5

2 for DDC controls

Ultra

Low Leak Air

5, 6

FDD. (Standard and

Outdoor-Air

Ultra

5

Damper

Manual

Outdoor-Air Damper

(25%)

Barometric

Barometric Hood (Horizontal
economizer)

Relief

1

Power Exhaust (Prop Design)

Low

†

X

X

X

X

X

X

X

XX

X

X

XX

X

X

X

XX

XX

XX

XX

X

XX

X

XX

ITEM OPTION* ACCESSORY

ECONOMIZER SENSORS AND IAQ
DEVICES

Single Dry Bulb Temperature
Sensors

Differential Dry Bulb Temperature
Sensors

Single Enthalpy Sensors

Differential Enthalpy Sensors

Wall or Duct Mounted CO
Sensor

Unit Mounted CO

2

2

2

2

Sensor

2

2

2

2

4-in. Filter Track Assembly

XX

X

XX

X

X

X

X

GAS HEAT

Propane Conversion Kit

Stainless Steel Heat Exchanger

High Altitude Conversion Kit

Flue Discharge Deflector

X

X

X

X

INDOOR MOTOR AND DRIVE

Multiple Motor and Drive
Packages

2-speed Indoor Fan Motor
System w/VFD Controller
(2-stage Cooling Only with
Electrical Mechanical and RTU
Open Controls)

Display Kit for 2-Speed Indoor
Fan Motor System with VFD

X

X

X

LOW AMBIENT CONTROL

Winter Start Kit

Motormaster
Controller to –20°F

2

®

Head Pressure

3

X

X

POWER OPTIONS

Powered Convenience Outlet

Unpowered Convenience Outlet
(125 amp Factory-Installed, 20
amp Field-Installed)

Non-Fused Disconnect

4

X

XX

X

ROOF CURBS

Roof Curb 14-in. (356 mm)

Roof Curb 24-in. (610 mm)

*Factory-installed option.
†Field-installed accessory.

NOTES:

1. Included with economizer.

2. Sensors used to optimize economizer performance.

3. See application data for assistance.

4. Non-fused disconnect switch cannot be used when MOCP electrical rating
exceeds 70 amps at 460/575 volt and 150 amps at 208/230
volt. Bryant Packaged RTUBuilder selects this automatically.

5. FDD (Fault Detection and Diagnostic) capability per California Title 24 section

120.2.

6. Models with RTU Open controls comply with California Title 24 Fault Detection

and Diagnostic (FDD).

X

X

†

11

OPTIONS AND ACCESSORIES (cont)

Economizer (dry-bulb or enthalpy) — Economizers

save money. They bring in fresh, outside air for ventilation; and
provide cool, outside air to cool your building. This is the pre­ferred method of low-ambient cooling. When coupled to CO
sensors, economizers can provide even more savings by cou­pling the ventilation air to only that amount required.

Economizers are available, installed and tested by the factory,
with either enthalpy or dry-bulb temperature inputs. Additional
sensors are available as accessories to optimize the economiz­ers. Economizers include a powered exhaust system to help
equalize building pressures.

Economizers include gravity controlled barometric relief that
helps equalize building pressure and ambient air pressures.
This can be a cost effective solution to prevent building pres­surization. Economizers are available in Ultra Low Leak and
standard low leak versions. Economizers can be factory­installed or easily field-installed.

Optional Perfect Humidity™ Adaptive Dehumidifica­tion System —

system is an all-inclusive factory installed option that can be
ordered with any Preferred Series 581J 17-28 rooftop unit.

This system expands the envelope of operation of Bryant’s Pre­ferred Series rooftop products to provide unprecedented flexi­bility to meet year round comfort conditions.

The Perfect Humidity dehumidification system has the indus­try’s only dual dehumidification mode setting. The Perfect
Humidity system includes two new modes of operation.

The Preferred Series 581J 17-28 rooftop coupled with the Per­fect Humidity system is capable of operating in normal design
cooling mode, subcooling mode, and hot gas reheat mode. Nor­mal design cooling mode is when the unit will operate under its
normal sequence of operation by cycling compressors to main­tain comfort conditions.

Subcooling mode will operate to satisfy part load type condi­tions when the space requires combined sensible and a higher
proportion of latent load control. Hot Gas Reheat mode will
operate when outdoor temperatures diminish and the need for
latent capacity is required for sole humidity control. Hot Gas
Reheat mode will provide neutral air for maximum dehumidifi­cation operation.

Bryant’s Perfect Humidity dehumidification

Thru-the-Base Connections — Thru-the-base provisions/

connection points are available as standard with every unit.
When bottom connections are required, field furnished cou­plings are required.

Hinged Access Panels — Allows access to unit’s major

components with specifically designed hinged access panels.
Panels are filter, control box, indoor fan motor.

Cu/Cu (Indoor) Coils (3-Phase Models Only) — Copper

fins and copper tubes are mechanically bonded to copper tubes
and copper tube sheets. A polymer strip prevents coil assembly
from contacting the sheet metal coil pan to minimize potential
for galvanic corrosion between coil and pan.

E-coated (Outdoor and Indoor) Coils — A flexible

epoxy polymer coating uniformly applied to all coil surface areas

without material bridging between fins. Coating process shall
ensure complete coil encapsulation of tubes, fins and headers.

Pre-Coated Outdoor Coils — A durable epoxy-phenolic

2

coating to provide protection in mildly corrosive coastal envi­ronments. The coating minimizes galvanic action between dis­similar metals. Coating is applied to the aluminum fin stock
prior to the fin stamping process to create an inert barrier
between the aluminum fin and copper tube.

Condenser Coil Louvered Hail Guard — Sleek, lou-

vered panels protect the condenser coil from hail damage, for­eign objects, and incidental contact. This can be purchased as a
factory installed option or as a field installed accessory.

Smoke Detectors — Trust the experts. Smoke detectors

make your application safer and your job easier. Bryant smoke
detectors immediately shut down the rooftop unit when smoke
is detected. They are available, installed by the factory, for sup­ply air, return air, or both.

Optional Stainless Steel Heat Exchanger — The

stainless steel heat exchanger option provides the tubular heat
exchanger be made out of a minimum 20 gauge type 409 stain­less steel for applications where the mixed air to the heat ex­changer is expected to drop below 45°F (7°C). Stainless steel
may be specified on applications where the presence of air­borne contaminants require its use (applications such as paper
mills) or in area with very high outdoor humidity that may re­sult in severe condensation in the heat exchanger during cool­ing operation.

Convenience Outlet (Powered or Un-powered) —

Reduce service and/or installation costs by including a conve­nience outlet in your specification. Bryant will install this ser­vice feature at our factory. Provides a convenient, 15 amp, 115v
GFCI receptacle with “Wet in Use” cover. The “powered”
option allows the installer to power the outlet from the line side
of the disconnect side as required by code. The “unpowered”
option is to be powered from a separate 115/120v power
source.

Non-Fused Disconnect — This OSHA-compliant, factory-

installed, safety switch allows a service technician to locally
secure power to the rooftop.

When selecting a factory-installed non-fused disconnect, note
they are sized for unit as ordered from the factory. The sizing of
these does not accommodate any power exhaust devices, etc.

HACR Breaker — These manual reset devices provide

overload and short circuit protection for the unit. Factory wired
and mounted with the units with access cover to help provide
environment protection.

On 575V applications, HACR breaker can only be used with
WYE power distribution systems. Use on Delta power distribu­tion systems is prohibited.

Foil Faced Insulated Cabinet — Cabinet is fully insulated

with non-fibrous, foil faced cleanable insulation that is secured
and encapsulated in unit design.

12

RTU Open Protocol Controller — Connect the rooftop to

an existing BAS without needing complicated translators or
adapter modules using the RTU Open controller. This new con­troller speaks the 4 most common building automation system
languages (BACnet

1

, Modbus2, N2, and LonWorks3). Use this

controller when you have an existing BAS.

Condensate Overflow Switch (Factory-Installed
Option) —

condensate level in the drain pan and shuts down compression
operation when overflow conditions occur. It includes:

• Indicator light - solid red (more than 10 seconds on water
contact - compressors disabled), blinking red (sensor dis­connected)

• 10 second delay to break - eliminates nuisance trips from
splashing or waves in pan (sensor needs 10 seconds of con­stant water contact before tripping)

• Disables the compressor(s) operation when condensate plug
is detected, but still allows fans to run for Economizer.

This sensor and related controller monitors the

Power Exhaust with Barometric Relief — Superior

internal building pressure control. This field-installed acces­sory or factory-installed option may eliminate the need for
costly, external pressure control fans.

Low Ambient Controller — The low ambient controller is a

head pressure controller kit that is designed to maintain the unit’s
condenser head pressure during periods of low ambient cooling
operation. This device should be used as an alternative to econo­mizer free cooling, not when economizer usage is neither appro­priate nor desired. The low ambient controller will either cycle
the outdoor fan motors or operate them at reduced speed to main­tain the unit operation, depending on the model. This controller
allows cooling operation down to 0°F (–18°C) ambient condi­tions.

Motorized 2-Position Damper — The new Bryant 2-posi-

tion, motorized outdoor air damper admits up to 100% outside
air. Using reliable, gear-driven technology, the 2-position
damper opens to allow ventilation air and closes when the roof­top stops, stopping unwanted infiltration.

Manual OA Damper — Manual outdoor air dampers are an

economical way to bring in ventilation air. The dampers are
available in 25% versions.

2-Speed Indoor Fan Motor System — Bryant’s 2-Speed

Indoor Fan Motor System saves energy and installation time by
utilizing a Variable Frequency Drive (VFD) to automatically
adjust the indoor fan motor speed in sequence with the units
cooling operation. Per ASHRAE 90.1 2016 standard section

6.4.3.10.b, during the first stage of cooling operation the VFD

will adjust the fan motor to provide
lished for the unit. When a call for the second stage of cooling is
required, the VFD will allow the total cfm for the unit established
(100%). During the heating mode the VFD will allow total
design cfm (100%) operation and during the ventilation mode
the VFD will allow operation to

1. BACnet is a registered trademark of ASHRAE (American Soci­ety of Heating, Refrigerating and Air-Conditioning Engineers).

2. Modbus is a registered trademark of Schneider Electric.

3. LonWorks is a registered trademark of Echelon Corporation.

2

/3 of the total cfm estab-

2

/3 of total cfm.

Compared to single speed indoor fan motor systems, Bryant’s 2­Speed Indoor Fan Motor System can save substantial energy,
25%+*, versus single speed indoor fan motor systems.

*Data based on .10 ($/kWh) in an office application utilizing
Bryant’s HAP 4.6 simulation software program.

The VFD used in Bryant’s 2-Speed Indoor Fan Motor System
has soft start capabilities to slowly ramp up the speeds, thus elim­inating any high inrush air volume during initial start-up. It also
has internal over current protection for the fan motor and a field
installed display kit that allows adjustment and in depth diagnos­tics of the VFD.

This 2-Speed Indoor Fan Motor System is available on models
with 2-stage cooling operation with electrical mechanical or
RTU Open, Multi Protocol controls. Both space sensor and con­ventional thermostats controls can be used to provide accurate
control in any application.

The 2-Speed Indoor Fan Motor System is very flexible for initial
fan performance set up and adjustment. The standard factory
shipped VFD is pre-programmed to automatically stage the fan
speed between the first and second stage of cooling. The unit fan
performance static pressure and cfm can be easily adjusted using
the traditional means of pulley adjustments. The other means to
adjust the unit static and cfm performance is to utilize the field
installed Display Kit and adjust the frequency and voltage in the
VFD to required performance requirements. In either case, once
set up, the VFD will automatically adjust the speed between the
cooling stage operations.

Alternate Motors and Drives — Some applications need

larger horsepower motors, some need more airflow, and some
need both. Regardless of the case, your Bryant expert has a fac­tory-installed combination to meet your application. A wide
selection of motors and pulleys (drives) are available, factory­installed, to handle nearly any application.

Barometric Hood — For Horizontal Economizer applica-

tions where relief damper is installed in duct work. This kit pro­vides the needed protection.

Differential Enthalpy Sensor — The differential

enthalpy sensor is comprised of an outdoor and return air
enthalpy sensors to provide differential.

Wall or duct mounted CO2 Sensor — The IAQ sensor

shall be available in duct or wall mount. The sensor provides
demand ventilation indoor air quality (IAQ) control.

Time Guard II Control Circuit — This accessory pro-

tects your compressor by preventing short-cycling in the event
of some other failure, prevents the compressor from restarting
for 30 seconds after stopping. Not required with PremierLink,
RTU Open, or authorized commercial thermostats.

Propane Conversion Kit — Convert your gas heat rooftop

from standard natural gas operation to Propane using this field­installed kit.

High Altitude Heating — High altitudes have less

oxygen, which affects the fuel/air mixture in heat exchangers.
In order to maintain a proper fuel/air mixture, heat exchangers
operating in altitudes above 2000 ft (610 m) require different
orifices. To select the correct burner orifices or determine the
heat capacity for a high altitude application, use either the
selection software, or the unit’s service manual. High altitudes
have less oxygen, which means heat exchangers need less fuel.
The new gas orifices in this field-installed kit make the

13

OPTIONS AND ACCESSORIES (cont)

necessary adjustment for high altitude applications. They
restore the optimal fuel to air mixture and maintain healthy
combustion on altitudes above 2000 ft (610 m).

NOTE: Typical natural gas heating value ranges from 975 to
1050 Btu/ft
down approximately 1.7% per every thousand feet elevation.
Standard factory orifices can typically be used up to 2000 ft
(610 m) elevation without any operational issues.

3

at sea level nationally. The heating value goes

Flue Discharge Deflector — The flue discharge deflector is

a useful accessory when flue gas recirculation is a concern. By
venting the flue discharge upwards, the deflector minimizes the
chance for a neighboring unit to intake the flue exhaust.

Winter Start Kit — The winter start kit by Bryant extends

the low ambient limit of your rooftop to 25°F (–4°C). The kit
bypasses the low pressure switch, preventing nuisance tripping
of the low pressure switch. Other low ambient precautions may
still be prudent.

Motormaster® Head Pressure Controller — The

Motormaster motor controller is a low ambient, head pressure
controller kit that is designed to maintain the unit’s condenser
head pressure during periods of low ambient cooling operation.

This device should be used as an alternative to economizer free
cooling when economizer usage is either not appropriate or
desired. The Motormaster controller will either cycle the out­door-fan motors or operate them at reduced speed to maintain
the unit operation, depending on the model.

Motormaster controller allows cooling operation down to
–20°F (–29°C) ambient conditions.

Roof Curb (14-in./356 mm or 24-in./610 mm) — Full

perimeter roof curb with exhaust capability provides sepa­rate air streams for energy recovery from the exhaust air
without supply air contamination.

Horizontal Roof Curb Adapter (Vertical to Horizon­tal Airflow) — Horizontal Roof Curb Adapters —

Used when horizontal supply and/or return is desired. Motor
Status Indicator Accessory – monitors wheel, supply and
exhaust motors and provides indication if not operating. Filter
status indicator accessory – monitors static pressure across sup­ply and exhaust filters and provides indication when filters
become clogged.

14

OPTION / ACCESSORY NAME

Barometric Relief Damper 50 23 50 23 50 23 50 23

Perfect Humidity™ System*

Economizer

Power Exhaust

EconoMi$er

®

(IV, X, or 2)

Copper Tube/Fin Condenser Coil

Copper Tube/Fin Evaporator Coil

Copper Tube/Fin Condenser and Evaporator Coil

Low Gas Heat

Medium Gas Heat

High Gas Heat

Flue Discharge Deflector

Roof Curb 14-in. (356 mm)

Roof Curb 24-in. (610 mm)

Louvered Condenser Coil Hail Guard

Sensor

CO

2

Return Smoke Detector

Supply Smoke Detector

Fan/Filter Status Switch

Non-Fused Disconnect

Powered Convenience Outlet

Non-Powered Convenience Outlet

Enthalpy Sensor

Differential Enthalpy Sensor

Motorized 2-Position Damper

Manual Damper

Field Filter Track 4-in. (102mm)

®

Motormaster

Controller

Medium Static Motor/Drive

High Static Motor/Drive

Barometric Relief Hood (Horizontal)

2-Speed Indoor Fan Motor

LEGEND
— Not Available
* For Perfect Humidity system add Motormaster

OPTIONS AND ACCESSORY WEIGHTS

17 20 24 28

lb kg lb kg lb kg lb kg

110 50 120 55 120 55 120 55

498 226 498 226 505 229 505 229

125 57 125 57 125 57 125 57

170 77 170 77 170 77 195 88

28 13 30 14 34 15 34 15

110 50 110 50 135 61 16 73

————————

85 39 85 39 85 39 85 39

90 41 90 41 90 41 90 41

113 51 113 51 113 51 113 51

7 3 7 3 7 3 7 3

240 109 240 109 240 109 255 116

340 154 340 154 340 154 355 161

60 27 60 27 120 54 150 68

5 2 5 2 5 2 5 2

5 2 5 2 5 2 5 2

5 2 5 2 5 2 5 2

2 1 2 1 2 1 2 1

15 7 15 7 15 7 15 7

35 16 35 16 35 16 35 16

5 2 5 2 5 2 5 2

2 1 2 1 2 1 2 1

3 1 3 1 3 1 3 1

50 23 50 23 50 23 65 29

35 16 35 16 35 16 40 18

12 5 12 5 12 5 12 5

35 16 35 16 35 16 35 16

5 2 6 3 6 3 6 3

11 5 12 5 16 7 16 7

25 11 25 11 25 11 25 11

20 9 20 9 20 9 20 9

NOTE: Where multiple variations are available, the heaviest combina­tion is listed.

®

controller.

581J UNIT WEIGHT

15

581J*17 BASE UNIT DIMENSIONS

DIMENSIONS

16

581J*17 BASE UNIT DIMENSIONS (cont)

17

581J*17 CORNER WEIGHTS

DIMENSIONS (cont)

18

581J*17 SERVICE CLEARANCES

NOTE: Unit is not designed to have overhead obstruction. Contact Application Engineering for guidance on any application planning overhead ob­struction or for vertical clearances.

LOCATION

DIMENSION

(in.)

CONDITION

A 36

Recommended clearance for airflow and service.

B 42

Recommended clearance for airflow and service.

C

18

No convenience outlet.
No economizer.
No field-installed disconnect on economizer hood side (factory-installed disconnect installed).

36

Convenience outlet installed.
Vertical surface behind servicer is electrically non-conductive (e.g. wood, fiberglass).

42

Convenience outlet installed.
Vertical surface behind servicer is electrically conductive (e.g. metal, masonry)

96

Economizer and/or Power Exhaust installed.
Check for sources of flue products within 10-ft. of economizer fresh air intake.

D 42

Recommended clearance for service.

C

B

A

D

19

DIMENSIONS (cont)

581J*20-24 BASE UNIT DIMENSIONS

20

581J*20-24 BASE UNIT DIMENSIONS (cont)

21