NOTE: When compressors are rotating in the wrong direc- tion, the unit will have increased noise levels and will not provide heating and cooling.

After a few minutes of reverse operation, the scroll compres- sor internal overload protection will open, which will acti- vate the unit’s lockout and requires a manual reset. Reset is accomplished by turning the thermostat on and off.

VI. INTERNAL WIRING

Check all electrical connections in unit control boxes; tighten as required.

VII. CRANKCASE HEATER(S)

Crankcase heater(s) is energized as long as there is power to the unit and the compressor is not operating.

IMPORTANT: Unit power must be on for 24 hours prior to start-up. Otherwise, damage to compressor may result.

VIII. EVAPORATOR FAN

Fan belt and variable pulleys are factory-installed. Remove tape from the fan pulley. See Tables 3-10 for Fan Perfor- mance Data. Be sure that fans rotate in the proper direction. See Table 11 for air quantity limits. See Table 12 for Evapo- rator Fan Motor Specifications. See Table 13 for static pres- sure information for accessories and options. See Table 14 for fan rpm at various motor pulley settings. To alter fan perfor-

mance, see Evaporator Fan Performance Adjustment section on page 26.

NOTE: A 31/2-in. bolt and threaded plate are included in the installer’s packet. They can be added to the motor support channel below the motor mounting plate to aid in raising the fan motor.

IX. CONDENSER FANS AND MOTORS

Condenser fans and motors are factory set. Refer to Con- denser-Fan Adjustment section (page 27) as required. Be sure that fans rotate in the proper direction.

X. RETURN-AIR FILTERS

Check that correct filters are installed in filter tracks (see Table 1). Do not operate unit without return-air filters.

XI. OUTDOOR-AIR INLET SCREENS

Outdoor-air inlet screens must be in place before operating unit.

XII. ACCESSORY ECONOMIZER ADJUSTMENT

Remove filter access panel. Check that outdoor-air damper is closed and return-air damper is open.

Economizer operation and adjustment are described in Base Unit Operation section on page 24, and in Economizer Adjustment section on page 28.

Table 3 — Fan Performance — 581A155225 (Low Heat Units with Standard Indoor Fan Motor)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

CFM

 

0.2

 

 

0.4

 

 

 

0.6

 

 

 

0.8

 

 

1.0

 

 

 

Rpm

Watts

Bhp

Rpm

Watts

Bhp

Rpm

 

Watts

Bhp

Rpm

 

Watts

Bhp

Rpm

Watts

 

Bhp

3750

753

915

1.05

838

1066

1.23

945

 

1278

1.47

1044

 

1500

1.73

1138

1731

 

1.99

4000

755

991

1.14

865

1198

1.38

968

 

1414

1.63

1063

 

1639

1.89

1154

1873

 

2.15

4250

788

1129

1.30

894

1341

1.54

992

 

1562

1.80

1084

 

1791

2.06

1172

2029

 

2.33

4500

822

1280

1.47

923

1497

1.72

1017

 

1722

1.98

1106

 

1956

2.25

1191

2196

 

2.53

4750

857

1443

1.66

953

1666

1.92

1044

 

1896

2.18

1130

 

2133

2.45

1212

2377

 

2.73

5000

891

1620

1.86

984

1847

2.12

1071

 

2082

2.39

1154

 

2323

2.67

1234

2572

 

2.96

5250

927

1810

2.08

1015

2043

2.35

1099

 

2282

2.62

1180

 

2528

2.91

—

—

 

—

5500

962

2014

2.32

1047

2252

2.59

1129

 

2496

2.87

—

 

—

—

—

—

—

 

5750

998

2233

2.57

1080

2476

2.85

—

 

—

—

—

—

—

—

—

—

 

 

6000

1035

2466

2.84

—

—

—

—

—

—

—

—

 

—

—

—

—

 

 

 

 

 

 

 

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

 

 

 

 

 

 

CFM

 

1.2

 

 

1.4

 

 

 

 

1.6

 

 

1.8

 

 

 

2.0

 

 

 

Rpm

Watts

Bhp

Rpm

Watts

 

Bhp

Rpm

 

Watts

Bhp

Rpm

Watts

 

Bhp

Rpm

Watts

 

Bhp

3750

1226

1971

2.27

1311

2218

 

2.55

1391

 

2474

2.85

—

—

 

—

—

—

—

 

4000

1240

2116

2.43

1322

2366

 

2.72

1401

 

2623

3.02

—

—

 

—

—

—

—

 

4250

1255

2274

2.61

1335

2526

 

2.91

—

 

—

—

—

—

—

—

—

—

 

 

4500

1272

2444

2.81

1350

2700

 

3.10

—

 

—

—

—

—

—

—

—

—

 

 

4750

1291

2628

3.02

—

—

 

—

—

—

—

—

—

—

 

—

—

—

 

 

5000

—

—

—

—

—

—

—

—

 

—

—

—

—

 

—

—

—

 

 

5250

—

—

—

—

—

—

—

—

 

—

—

—

—

 

—

—

—

 

 

5500

—

—

—

—

—

—

—

—

 

—

—

—

—

 

—

—

—

 

 

5750

—

—

—

—

—

—

—

—

 

—

—

—

—

 

—

—

—

 

 

6000

—

—

—

—

—

—

—

—

 

—

—

—

—

 

—

—

—

 

 

 

 

LEGEND

Bhp

—

Brake Horsepower

FIOP

—

Factory-Installed Option

Watts —

Input Watts to Motor

*Standard low-medium static drive range is 834 to 1064 rpm. Alternate high-static drive range is 1161 to 1426. Other rpms require a field- supplied drive.

NOTES:

1.Maximum continuous bhp for the standard motor is 3.13. The maxi- mum continuous watts is 2700. Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm.

2.Static pressure losses (i.e., economizer) must be added to external static pressure before entering Fan Performance table.

3.Interpolation is permissible. Do not extrapolate.

4.Fan performance is based on wet coils, clean filters, and casing losses. See Table 13 for accessory/FIOP static pressure information.

5.Extensive motor and drive testing on these units ensures that the full bhp and watts range of the motor can be utilized with confidence. Using your fan motors up to the watts or bhp rating shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.

6.Use of a field-supplied motor may affect wiring size. Contact your Bryant representative for details.

—15—

Page 14 Page 16
Page 15
Image 15
Bryant 581A VI. Internal Wiring, VII. Crankcase Heaters, VIII. Evaporator FAN, IX. Condenser Fans and Motors
Page 14 Page 16

581A specifications

The Bryant 581A is a pivotal model in the realm of heating, ventilation, and air conditioning (HVAC) systems, known for its robust performance and energy efficiency. As part of the Bryant product lineup, the 581A offers a blend of innovative technologies combined with reliable engineering, making it a suitable choice for both residential and light commercial applications.

One of the standout features of the Bryant 581A is its outstanding energy efficiency. With a Seasonal Energy Efficiency Ratio (SEER) rating of up to 16, this model meets Energy Star qualifications, ensuring that homeowners can enjoy lower utility bills while helping to reduce their environmental footprint. The efficiency is further enhanced by the unit’s environmentally friendly refrigerant, which not only improves performance but also aligns with modern sustainability standards.

Another key characteristic of the Bryant 581A is its durable construction. Designed to withstand various weather conditions, the unit features a robust cabinet that protects internal components. This durability not only prolongs the lifespan of the system but also minimizes the need for frequent maintenance or repairs. The coil design is optimized for heat transfer efficiency, enhancing the unit's overall performance in both cooling and heating modes.

In terms of technology, the Bryant 581A incorporates advanced control systems that enable precise temperature regulation. The multi-stage cooling capabilities ensure that the system can adapt to varying temperature demands, providing comfort in all seasons. Additionally, the model is compatible with smart thermostats, allowing homeowners to control their HVAC system remotely via smartphone or other connected devices.

Noise reduction is another aspect where the Bryant 581A excels. Equipped with a variable-speed compressor and sound-dampening features, this model operates quietly, minimizing disruption in residential or office environments. This focus on acoustic comfort makes it an ideal choice for those who value a peaceful living or working space.

Overall, the Bryant 581A represents an excellent balance of efficiency, durability, and modern technology. With features aimed at enhancing user comfort and reducing operational costs, it stands out as a reliable solution in the competitive HVAC market. Whether for new installations or replacements, the Bryant 581A is a testament to the brand’s commitment to quality and innovation in home climate control.
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