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Bryant 581A operation manual Low Voltage Control Schematic

Models: 581A

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Fig. 40 — Low Voltage Control Schematic

Fig. 40 — Low Voltage Control Schematic

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Bryant 581A operation manual Low Voltage Control Schematic

Contents

CONTENTS XI. Step 11 - Position Optional PowerSAFETY CONSIDERATIONS INSTALLATION I. STEP 1 - PROVIDE UNIT SUPPORTC. Installation Onto Curb B. Alternate Unit SupportC. Slab Mount Horizontal Units Only II. STEP 2 - REMOVE SHIPPING RAILSFig. 1 - Roof Curb Details SHIPPING RAILS Fig. 2 - Shipping Rail RemovalFig. 3 - Rigging Details Fig. 4 - Base Unit Dimensions Table 1 - Physical Data Page Page A. Vertical Configuration Fig. 5 - Alignment Hole DetailsFig. 6 - Alignment Hole Location IV. STEP 4 - FIELD FABRICATE DUCTWORKVI. STEP 6 - INSTALL FLUE HOOD AND INLET HOOD VIII. STEP 8 - INSTALL GAS PIPINGFig. 11 - Combustion Fan Housing Location Fig. 9 - Concentric Duct DetailsA. Field Power Supply B. Field Control WiringFig. 12 - Condensate Drain Details Fig. 13 - Condensate Drain Piping DetailsFig. 15 - Field Power Wiring Connections X. STEP 10 - INSTALL OUTDOOR-AIRHOODA. Manual Damper Assembly Fig. 17 - Outdoor-AirHood ComponentPage Page Fig. 19 - Outdoor-AirHood Assembled Fig. 18 - Outdoor-AirHood DetailsFig. 20 - Manual Damper Details Fig. 22 - Bracket and Hood Positioning XIII. STEP 13 - INSTALL ALL ACCESSORIESXII. STEP 12 - NON-FUSEDDISCONNECT III. REFRIGERANT SERVICE PORTS VI. INTERNAL WIRINGPRE-START-UP START-UPVIII. CONDENSER FANS AND MOTORS IX. RETURN-AIRFILTERSX. OUTDOOR-AIRINLET SCREENS XI. GAS HEATPage Page Page Page GENERAL NOTES FOR TABLES Page Page Page Page Table 23 - Power Exhaust Fan Performance Table 25 - Evaporator Fan Motor Specifications Table 24 - Operation Air Quantity LimitsTable 26 - Accessory/FIOP Static Pressure in. wg Table 27 - Fan Rpm at Motor Pulley SettingsXII. OPTIONAL ECONOMI$ER A. EconoMi$er IV Standard SensorsFig. 24 - Supply-AirTemperature Sensor Location Fig. 25 - Outdoor-AirTemperature ChangeoverTable 28 - EconoMi$er IV Sensor Usage Set PointsFig. 26 - EconoMi$er IV Wiring Fig. 29 - CO2 Sensor Maximum Range Setting Fig. 27 - Enthalpy Changeover Set PointsLED Locations APPROXIMATE DRY BULB TEMPERATURE- F CTO = Outdoor-AirTemperature TR = Return-AirTemperatureTM = Mixed-AirTemperature OA = Percent of Outdoor AirA. Cooling, Units Without Economizer Table 29 - CO2 Sensor Standard SettingsXII. OPERATING SEQUENCE SERVICE I. CLEANINGA. Coil Maintenance and Cleaning Recommendation B. Heating, Units Without EconomizerB.Condensate Drain C. FiltersD. Outdoor-AirInlet Screens E. Main BurnerIII. EVAPORATOR FAN SERVICE AND REPLACEMENT F. Flue Gas PassagewaysG. Combustion-AirBlower II. LUBRICATION A. CompressorsV.BELT TENSION ADJUSTMENT Table 30 - Belt Tension AdjustmentVI. CONDENSER-FANADJUSTMENT Fig Fig. 32 - Evaporator-FanMotor AdjustmentVII. POWER FAILURE C. To Use the Cooling Charging ChartIX. GAS VALVE ADJUSTMENT A. Natural Gas Fig. 35 - Cooling Charging Chart - 581A210 UnitsB.Cleaning and Adjustment X.MAIN BURNERSA.Main Burner Removal Table 31 - Altitude Compensation Natural GasB. High-Pressureand Low-PressureSwitches XV. REPLACEMENT PARTSXVI. DIAGNOSTIC LEDs Fig. 39 - Spark Gap AdjustmentLEGEND Fig. 40 - Low Voltage Control Schematic Fig. 40 - Low Voltage Control Schematic Fig. 41 - Power Schematic Fig. 42 - Component Arrangement TROUBLESHOOTING I. UNIT TROUBLESHOOTING Table 34 - Cooling Service AnalysisTable 36 - IGC Board LED Alarm Codes Table 35 - Heating Service AnalysisFig. 43 - IGC Control Heating and Cooling II.ECONOMI$ER IV TROUBLESHOOTING A. EconoMi$er IV PreparationB. Differential Enthalpy C.Single EnthalpyFig. 44 - EconoMi$er IV Functional View G.EconoMi$er IV Troubleshooting CompletionTable 37 - EconoMi$er IV Input/Output Logic Copyright 2005 Bryant Heating & Cooling Systems CATALOG NOPage Page Page START-UPCHECKLIST TEMPERATURESELECTRICAL PRESSURES