Bryant 581B installation instructions Contents, Safety Considerations, Installation

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installation, start-up and

581B

service instructions

 

DuraPac Plus Series

 

SINGLE PACKAGE ROOFTOP

GAS HEATING/ELECTRIC COOLING UNITS

Sizes 036-072 3 to 6 Tons

Cancels: II 581B-36-6

II 581B-36-7

 

10/1/05

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33 I. Step 1 — Provide Unit Support. . . . . . . . . . . . . . . . . 1 II. Step 2 — Field Fabricate Ductwork . . . . . . . . . . . . . 2

III. Step 3 — Determine Location of Drain Line

and External Trap. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 IV. Step 4 — Rig and Place Unit. . . . . . . . . . . . . . . . . . . 4 V. Step 5 — Install Flue Hood . . . . . . . . . . . . . . . . . . . . 4 VI. Step 6 — Install Gas Piping . . . . . . . . . . . . . . . . . . . 4 VII. Step 7 — Make Electrical Connections . . . . . . . . . . 9 VIII. Step 8 — Adjust Factory-Installed Options . . . . . . 13 IX. Step 9 — Adjust Evaporator-Fan Speed . . . . . . . . 22

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34-37

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38-44

TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . .45-49

INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . CL-1

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical compo- nents. Only trained and qualified service personnel should install, repair, or service air-conditioning equipment.

Untrained personnel can perform basic maintenance func- tions of cleaning coils and filters and replacing filters. All other operations should be performed by trained service per- sonnel. When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have fire extinguishers available for all brazing operations.

CAUTION: Ensure voltage listed on unit data plate agrees with electrical supply provided for the unit.

WARNING: Disconnect gas piping from unit when leak testing at pressure greater than 1/2 psig. Pressures greater than 1/2 psig will cause gas valve damage result- ing in hazardous condition. If gas valve is subjected to pressure greater than 1/2 psig, it must be replaced before use. When pressure testing field-supplied gas piping at pressures of 1/2 psig or less, a unit connected to such piping must be isolated by manually closing the gas valve(s).

WARNING: Before performing service or mainte- nance operations on unit, turn off main power switch to unit. Electrical shock could cause personal injury.

INSTALLATION

Unit is shipped in the vertical configuration. To convert to horizontal application, remove side duct opening covers. Using the same screws, install covers on vertical duct open- ings with the insulation-side down. Seals around duct open- ings must be tight. See Fig. 1.

I. STEP 1 — PROVIDE UNIT SUPPORT

A. Roof Curb

Assemble and install accessory roof curb in accordance with instructions shipped with curb. See Fig. 2. Install insulation, cant strips, roofing felt, and counter flashing as shown. Duct- work must be attached to curb. If gas is to be routed through the curb, attach the accessory thru-the-curb service connec- tion plate to the roof curb in accordance with the accessory installation instructions. Connection plate must be installed before unit is set in roof curb.

IMPORTANT: The gasketing of the unit to the roof curb is crit- ical for a watertight seal. Install gasket supplied with the roof curb as shown in Fig. 2. Improperly applied gasket can also result in air or water leaks and poor unit performance.

Curb should be level. This is necessary for unit drain to func- tion properly. Unit leveling tolerances are shown in Fig. 3. Refer to Accessory Roof Curb Installation Instructions for additional information as required.

B. Slab Mount (Horizontal Units Only)

Provide a level concrete slab that extends a minimum of 6 in. beyond unit cabinet. Install a gravel apron in front of con- denser coil air inlet to prevent grass and foliage from obstructing airflow.

NOTE: Horizontal units may be installed on a roof curb if required.

C. Alternate Unit Support

A non-combustible sleeper rail can be used in the unit curb support area. If sleeper rails cannot be used, support the long sides of the unit with a minimum of 3 equally spaced 4-in. x 4-in. pads on each side.

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Contents Safety Considerations ContentsInstallation Provide Unit SupportIII. Determine Location of Drain Line and External Trap II. Field Fabricate DuctworkCRBTMPWR001A01 Roof Curb Unit Size Accessory CRRFCURB001A01CRBTMPWR002A01 CRBTMPWR003A01VI. Install GAS Piping Install Flue HoodIV. RIG and Place Unit Positioning581B 036 Unit Operating Weight048 060Physical Data 581B036-072 Furnace Section LOSS-OF-CHARGE SWITCH/LOW-PRESSUREFreeze Protection Thermostat OUTDOOR-AIR Inlet ScreensBase Unit Dimensions 581B036-072 Field Control Wiring Field Power SupplyHeat Anticipator Settings Steel Pipe Spacing of Supports Nominal Diameter DimensionLow-Voltage Connections With or Without Economizer Power Wiring ConnectionsFAN Motor Power Exhaust MCA MocpDisconnect SIZE† RLA LRA FLA MCA MocpFAN Motor Supply SIZE†Disconnect Switch VIII. Adjust FACTORY-INSTALLED OptionsPerfect Humidity Dehumidification System LPSManual Outdoor-Air Damper Damper Panel with Manual Outdoor-Air Damper InstalledOptional Manual Outdoor-Air Damper With Hood Attached EconoMi$er IV Standard Sensors Indoor Coil Access Panel RelocationBarometric Flow Capacity EconoMi$er IV Control Modes Supply Air Sensor Temperature/Resistance ValuesEconoMi$er IV Sensor Usage Return Air Temperature or Enthalpy Sensor Mounting Location Enthalpy Changeover Set Points Page 581B Fan Rpm at Motor Pulley Setting With Standard Motor IX. Adjust EVAPORATOR-FAN Speed581B Fan Rpm at Motor Pulley Setting With High-Static Motor Unit Maximum Unit Voltage Phase Continuous BHP581B AMP DrawOutdoor Sound Power Total Unit Accessory/FIOP EconoMi$er IV Static Pressure* in. wgEvaporator-Fan Motor Data High-Static Motors 1265 1294 1175 1346 1275 1400 1147 9721320 1310 1371 1419 1500 1175 1086 1292670 666 257 778 367 871 471 952 572701 306 810 426 901 540 981 651 7601803 16491470 1784 19671008 643 967 563805 1049 731782 316 870 417 948 Rpm Bhp Watts 900 553 1341000 582 163 807 358 894 466 971675 277 643 234 762707 326 740 382839 412 938 505 1030 605 800 350 904 438 999 535879 483 974 580 919 561753 800 350 904 438 999 535 1087 640839 412 938 505 1030 605 1115 714 829General FAN Performance Notes VII. Refrigerant Service Ports VI. Internal WiringPRE-START-UP START-UP Unit PreparationXI. Main Burners CoolingXII. Heating XV. Operating Sequence XIII. Safety ReliefThermostat Input Economizer Function 581B Unit Operation Perfect Humidity Normal Design Cooling OperationIV. ECONOMI$ER IV Adjustment Service CleaningVI. HIGH-PRESSURE Switch VII. LOSS-OF-CHARGE SwitchLow Charge Cooling To Use Cooling Charging Chart, Standard UnitPerfect Humidity System Charging Unit 581BCooling Charging Chart, Standard 581B036 Condenser FAN Must be Operating XV. Replacement Parts XII. Limit SwitchFlue GAS Passageways XI. COMBUSTION-AIR BlowerMedium High Heat Units LOW Heat UnitsOLR CAPCLO CompLED Error Code Service Analysis Troubleshooting Unit TroubleshootingSymptom Cause Remedy LED OFFProblem Cause Remedy Heating Service AnalysisProblem Cause Remedy Cooling Service AnalysisII. ECONOMI$ER IV Troubleshooting EconoMi$er IV Input/Output Logic EconoMi$er IV Troubleshooting CompletionInputs Outputs Demand Control EnthalpyIndex Page Temperatures START-UP ChecklistPreliminary Information 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.

The furnace is equipped with a multi-speed blower motor that enhances comfort by providing consistent airflow throughout the home. This technology adjusts to different heating demands, ensuring that every room reaches the desired temperature without the discomfort of hot or cold spots. The quiet operation of the blower motor also adds to the overall comfort, creating a peaceful home environment.

Another notable characteristic of the Bryant 581B is its durable construction. It features a robust heat exchanger built from high-quality materials, designed to withstand the rigors of daily use. The compact design of the furnace allows it to fit seamlessly into various spaces, making it an ideal choice for both new installations and replacement projects.

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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