Bryant 581B installation instructions IX. Adjust EVAPORATOR-FAN Speed

Page 22

Table 5 — CO2 Sensor Standard Settings

 

 

 

VENTILATION

ANALOG

CO2

OPTIONAL

RELAY

SETTING

EQUIPMENT

OUTPUT

RATE

CONTROL RANGE

RELAY SETPOINT

HYSTERESIS

OUTPUT

 

 

 

(cfm/Person)

(ppm)

(ppm)

(ppm)

 

 

 

 

1

 

Proportional

Any

0-10V

0-2000

1000

50

 

4-20 mA

 

 

 

 

 

 

 

2

Interface w/Standard

Proportional

Any

2-10V

0-2000

1000

50

Building Control System

7-20 mA

 

 

 

 

 

 

3

 

Exponential

Any

0-10V

0-2000

1100

50

 

4-20 mA

 

 

 

 

 

 

 

4

 

Proportional

15

0-10V

0-1100

1100

50

 

4-20 mA

 

 

 

 

 

 

 

5

 

Proportional

20

0-10V

0- 900

900

50

 

4-20 mA

 

Economizer

 

 

 

 

 

6

Exponential

15

0-10V

0-1100

1100

50

 

 

4-20 mA

 

 

 

 

 

 

 

7

 

Exponential

20

0-10V

0- 900

900

50

 

4-20 mA

 

 

 

 

 

 

 

8

Health & Safety

Proportional

—

0-10V

0-9999

5000

500

4-20 mA

 

 

 

 

 

 

 

9

Parking/Air Intakes/

Proportional

—

0-10V

0-2000

700

50

Loading Docks

4-20 mA

 

 

 

 

 

 

LEGEND

ppm — Parts Per Million

IX. STEP 9 — ADJUST EVAPORATOR-FAN SPEED

Adjust evaporator-fan speed to meet jobsite conditions. Tables 6A and 6B show fan rpm at motor pulley settings for standard and alternate motors. Tables 7 and 8 show evapora- tor fan motor data. Table 9 shows EconoMi$er IV pressure drop. Table 10 shows sound data. Refer to Tables 11-28 for fan performance data. See Fig. 38 for Perfect Humidity™ sys- tem static pressure drop.

NOTE: Before adjusting fan speed, make sure the new fan speed will provide an acceptable air temperature rise range on heating as shown in Table 1.

To change fan speed:

1.Shut off unit power supply.

2.Loosen belt by loosening fan motor mounting nuts. See Fig. 39.

3.Loosen movable pulley flange setscrew (see Fig. 40).

4.Screw movable flange toward fixed flange to increase fan speed and away from fixed flange to decrease fan

speed. Increasing fan speed increases load on motor. Do not exceed maximum speed specified in Table 1.

5.Set movable flange at nearest keyway of pulley hub and tighten setscrew. (See Table 1 for speed change for each full turn of pulley flange.)

To align fan and motor pulleys:

1.Loosen fan pulley setscrews.

2.Slide fan pulley along fan shaft.

3.Make angular alignment by loosening motor from mounting plate.

To adjust belt tension:

1.Loosen fan motor mounting nuts.

2.Slide motor mounting plate away from fan scroll for proper belt tension (1/2-in. deflection with 8 to 10 lb of force) and tighten mounting nuts (see Fig. 39).

3.Adjust bolt and nut on mounting plate to secure motor in fixed position.

Table 6A — 581B Fan Rpm at Motor Pulley Setting With Standard Motor*

UNIT

 

 

 

 

 

MOTOR PULLEY TURNS OPEN

 

 

 

 

 

581B

0

1/2

1

11/2

2

 

21/2

3

31/2

 

4

41/2

5

51/2

6

036

1044

1008

971

935

898

 

862

826

789

 

753

716

680

—

—

048

1185

1144

1102

1061

1019

 

978

936

895

 

853

812

770

—

—

060 (single and 3-phase)

1460

1425

1389

1354

1318

 

1283

1248

1212

 

1177

1141

1106

1070

1035

072

1585

1538

1492

1445

1399

 

1352

1305

1259

 

1212

1166

1119

—

—

*Approximate fan rpm shown (standard motor/drive).

Table 6B — 581B Fan Rpm at Motor Pulley Setting With High-Static Motor*

UNIT

 

 

 

 

 

MOTOR PULLEY TURNS OPEN

 

 

 

 

 

581B

0

1/2

1

11/2

2

21/2

3

31/2

4

41/2

5

51/2

6

036

1455

1423

1392

1360

1328

1297

1265

1233

1202

1170

1138

1107

1075

048

1455

1423

1392

1360

1328

1297

1265

1233

1202

1170

1138

1107

1075

060

1685

1589

1557

1525

1493

1460

1428

1396

1364

1332

1300

—

—

072

1685

1589

1557

1525

1493

1460

1428

1396

1364

1332

1300

—

—

*Approximate fan rpm shown (high-static motor/drive).

—22—

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Contents Installation ContentsSafety Considerations Provide Unit SupportII. Field Fabricate Ductwork III. Determine Location of Drain Line and External TrapCRBTMPWR002A01 Roof Curb Unit Size Accessory CRRFCURB001A01CRBTMPWR001A01 CRBTMPWR003A01IV. RIG and Place Unit Install Flue HoodVI. Install GAS Piping Positioning048 Unit Operating Weight581B 036 060Physical Data 581B036-072 Freeze Protection Thermostat LOSS-OF-CHARGE SWITCH/LOW-PRESSUREFurnace Section OUTDOOR-AIR Inlet ScreensBase Unit Dimensions 581B036-072 Heat Anticipator Settings Field Power SupplyField Control Wiring Steel Pipe Spacing of Supports Nominal Diameter DimensionPower Wiring Connections Low-Voltage Connections With or Without EconomizerDisconnect SIZE† Power Exhaust MCA MocpFAN Motor RLA LRA FLA MCA MocpSIZE† FAN Motor SupplyPerfect Humidity Dehumidification System VIII. Adjust FACTORY-INSTALLED OptionsDisconnect Switch LPSDamper Panel with Manual Outdoor-Air Damper Installed Manual Outdoor-Air DamperOptional Manual Outdoor-Air Damper With Hood Attached Indoor Coil Access Panel Relocation EconoMi$er IV Standard SensorsBarometric Flow Capacity EconoMi$er IV Control Modes Supply Air Sensor Temperature/Resistance ValuesEconoMi$er IV Sensor Usage Return Air Temperature or Enthalpy Sensor Mounting Location Enthalpy Changeover Set Points Page 581B Fan Rpm at Motor Pulley Setting With Standard Motor IX. Adjust EVAPORATOR-FAN Speed581B Fan Rpm at Motor Pulley Setting With High-Static Motor 581B Phase Continuous BHPUnit Maximum Unit Voltage AMP DrawOutdoor Sound Power Total Unit Accessory/FIOP EconoMi$er IV Static Pressure* in. wgEvaporator-Fan Motor Data High-Static Motors 1320 1310 1371 1419 1500 1175 1086 1294 1175 1346 1275 1400 1147 9721265 1292701 306 810 426 901 540 981 651 666 257 778 367 871 471 952 572670 7601470 1784 16491803 1967805 967 5631008 643 1049 7311000 582 163 Rpm Bhp Watts 900 553 134782 316 870 417 948 807 358 894 466 971707 326 643 234 762675 277 740 382879 483 974 580 800 350 904 438 999 535839 412 938 505 1030 605 919 561839 412 938 505 1030 605 1115 714 800 350 904 438 999 535 1087 640753 829General FAN Performance Notes PRE-START-UP VI. Internal WiringVII. Refrigerant Service Ports START-UP Unit PreparationXI. Main Burners CoolingXII. Heating XIII. Safety Relief XV. Operating SequencePerfect Humidity Normal Design Cooling Operation Thermostat Input Economizer Function 581B Unit OperationVI. HIGH-PRESSURE Switch Service CleaningIV. ECONOMI$ER IV Adjustment VII. LOSS-OF-CHARGE SwitchPerfect Humidity System Charging To Use Cooling Charging Chart, Standard UnitLow Charge Cooling Unit 581BCooling Charging Chart, Standard 581B036 Condenser FAN Must be Operating Flue GAS Passageways XII. Limit SwitchXV. Replacement Parts XI. COMBUSTION-AIR BlowerLOW Heat Units Medium High Heat UnitsCLO CAPOLR CompSymptom Cause Remedy Troubleshooting Unit TroubleshootingLED Error Code Service Analysis LED OFFHeating Service Analysis Problem Cause RemedyCooling Service Analysis Problem Cause RemedyII. ECONOMI$ER IV Troubleshooting Inputs Outputs EconoMi$er IV Troubleshooting CompletionEconoMi$er IV Input/Output Logic Demand Control EnthalpyIndex Page Preliminary Information START-UP ChecklistTemperatures III. START-UP Electrical
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581B specifications

The Bryant 581B is an innovative and highly efficient gas furnace that stands out in the HVAC market for its remarkable performance, reliability, and advanced features. Designed to provide optimal heating comfort, the Bryant 581B is perfect for homeowners seeking both quality and energy efficiency.

One of the main features of the Bryant 581B is its impressive Annual Fuel Utilization Efficiency (AFUE) rating. With an AFUE rating of up to 80%, this gas furnace maximizes energy usage, ensuring that a significant portion of the fuel is converted into heat for your home. This efficiency not only translates into lower energy bills but also reduces the carbon footprint, making it an environmentally friendly choice.

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The Bryant 581B also comes with advanced safety features, including a self-diagnostic control board that monitors the system's performance. This feature allows for easy troubleshooting and maintenance, prolonging the life of the furnace. Additionally, the furnace is equipped with an induced draft blower that enhances venting efficiency and safety by ensuring that combustion gases are safely expelled from the home.

For homeowners looking for enhanced control, the Bryant 581B is compatible with a range of smart thermostats, providing the ability to monitor and adjust heating settings remotely. This integration with smart technology ensures that homeowners can maintain their desired comfort levels while maximizing efficiency.

In conclusion, the Bryant 581B gas furnace is a top-tier option that combines efficiency, durability, and modern technology. With its high AFUE rating, multi-speed blower, and advanced safety features, it promises to deliver unparalleled comfort and peace of mind for years to come. Whether for a new build or an upgrade, the Bryant 581B is an investment that pays off in both comfort and savings.
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