Bryant 581B Pre-Start-Up, START-UP Unit Preparation, II. GAS Piping, III. RETURN-AIR Filters

Page 34

PRE-START-UP

WARNING: Failure to observe the following warn- ings could result in serious personal injury.

1.Follow recognized safety practices and wear protective goggles when checking or servicing refrigerant system.

2.Do not operate compressor or provide any elec- tric power to unit unless compressor terminal cover is in place and secured.

3.Do not remove compressor terminal cover until all electrical sources are disconnected.

4.Relieve all pressure from system before touch- ing or disturbing anything inside terminal box if refrigerant leak is suspected around compres- sor terminals.

5.Never attempt to repair soldered connection while refrigerant system is under pressure.

6.Do not use torch to remove any component. Sys- tem contains oil and refrigerant under pres- sure. To remove a component, wear protective goggles and proceed as follows:

a.Shut off electrical power and then gas to unit.

b.Recover refrigerant to relieve all pressure from system using both high-pressure and low-pressure ports.

c.Cut component connection tubing with tub- ing cutter and remove component from unit.

d.Carefully unsweat remaining tubing stubs when necessary. Oil can ignite when exposed to torch flame.

Proceed as follows to inspect and prepare the unit for initial start-up:

1.Remove all access panels.

2.Read and follow instructions on all WARNING, CAU- TION, and INFORMATION labels attached to, or shipped with, unit.

3.Make the following inspections:

a.Inspect for shipping and handling damages such as broken lines, loose parts, or disconnected wires, etc.

b.Inspect for oil at all refrigerant tubing connec- tions and on unit base. Detecting oil generally indicates a refrigerant leak. Leak-test all refrig- erant tubing connections using electronic leak detector, halide torch, or liquid-soap solution.

c.Inspect all field-wiring and factory-wiring con- nections. Be sure that connections are completed and tight. Be sure that wires are not in contact with refrigerant tubing or sharp edges.

d.Inspect coil fins. If damaged during shipping and handling, carefully straighten fins with a fin comb.

4.Verify the following conditions:

a.Make sure that condenser-fan blade are correctly positioned in fan orifice. See Condenser-Fan Adjustment section on page 38 for more details.

b.Make sure that air filter(s) is in place.

c.Make sure that condensate drain trap is filled with water to ensure proper drainage.

d.Make sure that all tools and miscellaneous loose parts have been removed.

START-UP

I. UNIT PREPARATION

Make sure that unit has been installed in accordance with installation instructions and applicable codes.

II. GAS PIPING

Check gas piping for leaks.

WARNING: Disconnect gas piping from unit when leak testing at pressure greater than 1/2 psig. Pres- sures greater than 1/2 psig will cause gas valve damage resulting in hazardous condition. If gas valve is sub- jected 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 man- ually closing the gas valve.

III. RETURN-AIR FILTERS

Make sure correct filters are installed in unit (see Table 1). Do not operate unit without return-air filters.

IV. OUTDOOR-AIR INLET SCREENS

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

V. COMPRESSOR MOUNTING

Compressors are internally spring mounted. Do not loosen or remove compressor holddown bolts.

VI. INTERNAL WIRING

Check all electrical connections in unit control boxes. Tighten as required.

VII. REFRIGERANT SERVICE PORTS

Each unit system has 4 Schrader-type service ports: one on the suction line, one on the liquid line, and 2 on the compres- sor discharge line. Be sure that caps on the ports are tight. Two additional Schrader valves are located under the high- pressure and low-pressure switches, respectively.

VIII. HIGH FLOW REFRIGERANT VALVES

Two high flow valves are located on the hot gas tube coming out of the compressor and the suction tube going into the compressor. Large black plastic caps identify these valves. These valves have O-rings inside which screw the cap onto a brass body to prevent leaks. No field access to these valves is available at this time. Ensure the plastic caps remain on the valves and are tight or the possibility of refrigerant leakage could occur.

IX. COMPRESSOR ROTATION

On 3-phase units with scroll compressors, it is important to be certain compressor is rotating in the proper direction. To determine whether or not compressor is rotating in the proper direction:

1.Connect service gages to suction and discharge pres- sure fittings.

2.Energize the compressor.

3.The suction pressure should drop and the discharge pressure should rise, as is normal on any start-up.

If the suction pressure does not drop and the discharge pres- sure does not rise to normal levels:

1.Note that the evaporator fan (size 060 and 072 only) is probably also rotating in the wrong direction.

2.Turn off power to the unit and install lockout tag.

34

Image 34
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
Related manuals
Manual 40 pages 47.12 Kb Manual 64 pages 44.36 Kb

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.