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Bryant 581A operation manual IGC Control Heating and Cooling

Models: 581A

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Fig. 43 — IGC Control (Heating and Cooling)

LEGEND

IDM — Induced-Draft Motor

IGC — Integrated Gas Unit Controller

NOTE: Thermostat Fan Switch in the “AUTO” position.

Fig. 43 — IGC Control (Heating and Cooling)

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Page 49

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Bryant 581A operation manual IGC Control Heating and Cooling

Contents

XI. Step 11 - Position Optional Power CONTENTSSAFETY CONSIDERATIONS INSTALLATION I. STEP 1 - PROVIDE UNIT SUPPORTB. Alternate Unit Support C. Installation Onto CurbC. Slab Mount Horizontal Units Only II. STEP 2 - REMOVE SHIPPING RAILSFig. 1 - Roof Curb Details Fig. 3 - Rigging Details Fig. 2 - Shipping Rail RemovalSHIPPING RAILS Fig. 4 - Base Unit Dimensions Table 1 - Physical Data Page Page Fig. 5 - Alignment Hole Details A. Vertical ConfigurationFig. 6 - Alignment Hole Location IV. STEP 4 - FIELD FABRICATE DUCTWORKVIII. STEP 8 - INSTALL GAS PIPING VI. STEP 6 - INSTALL FLUE HOOD AND INLET HOODFig. 11 - Combustion Fan Housing Location Fig. 9 - Concentric Duct DetailsB. Field Control Wiring A. Field Power SupplyFig. 12 - Condensate Drain Details Fig. 13 - Condensate Drain Piping DetailsX. STEP 10 - INSTALL OUTDOOR-AIRHOOD Fig. 15 - Field Power Wiring ConnectionsA. Manual Damper Assembly Fig. 17 - Outdoor-AirHood ComponentPage Page Fig. 20 - Manual Damper Details Fig. 18 - Outdoor-AirHood DetailsFig. 19 - Outdoor-AirHood Assembled XII. STEP 12 - NON-FUSEDDISCONNECT XIII. STEP 13 - INSTALL ALL ACCESSORIESFig. 22 - Bracket and Hood Positioning VI. INTERNAL WIRING III. REFRIGERANT SERVICE PORTSPRE-START-UP START-UPIX. RETURN-AIRFILTERS VIII. CONDENSER FANS AND MOTORSX. OUTDOOR-AIRINLET SCREENS XI. GAS HEATPage Page Page Page GENERAL NOTES FOR TABLES Page Page Page Page Table 23 - Power Exhaust Fan Performance Table 24 - Operation Air Quantity Limits Table 25 - Evaporator Fan Motor SpecificationsTable 27 - Fan Rpm at Motor Pulley Settings Table 26 - Accessory/FIOP Static Pressure in. wgXII. OPTIONAL ECONOMI$ER A. EconoMi$er IV Standard SensorsFig. 25 - Outdoor-AirTemperature Changeover Fig. 24 - Supply-AirTemperature Sensor LocationTable 28 - EconoMi$er IV Sensor Usage Set PointsFig. 26 - EconoMi$er IV Wiring Fig. 27 - Enthalpy Changeover Set Points Fig. 29 - CO2 Sensor Maximum Range SettingLED Locations APPROXIMATE DRY BULB TEMPERATURE- F CTR = Return-AirTemperature TO = Outdoor-AirTemperatureTM = Mixed-AirTemperature OA = Percent of Outdoor AirXII. OPERATING SEQUENCE Table 29 - CO2 Sensor Standard SettingsA. Cooling, Units Without Economizer I. CLEANING SERVICEA. Coil Maintenance and Cleaning Recommendation B. Heating, Units Without EconomizerC. Filters B.Condensate DrainD. Outdoor-AirInlet Screens E. Main BurnerF. Flue Gas Passageways III. EVAPORATOR FAN SERVICE AND REPLACEMENTG. Combustion-AirBlower II. LUBRICATION A. CompressorsTable 30 - Belt Tension Adjustment V.BELT TENSION ADJUSTMENTVI. CONDENSER-FANADJUSTMENT Fig Fig. 32 - Evaporator-FanMotor AdjustmentC. To Use the Cooling Charging Chart VII. POWER FAILUREIX. GAS VALVE ADJUSTMENT A. Natural Gas Fig. 35 - Cooling Charging Chart - 581A210 UnitsX.MAIN BURNERS B.Cleaning and AdjustmentA.Main Burner Removal Table 31 - Altitude Compensation Natural GasXV. REPLACEMENT PARTS B. High-Pressureand Low-PressureSwitchesXVI. 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 Table 34 - Cooling Service Analysis TROUBLESHOOTING I. UNIT TROUBLESHOOTINGTable 35 - Heating Service Analysis Table 36 - IGC Board LED Alarm CodesFig. 43 - IGC Control Heating and Cooling A. EconoMi$er IV Preparation II.ECONOMI$ER IV TROUBLESHOOTINGB. Differential Enthalpy C.Single EnthalpyTable 37 - EconoMi$er IV Input/Output Logic G.EconoMi$er IV Troubleshooting CompletionFig. 44 - EconoMi$er IV Functional View CATALOG NO Copyright 2005 Bryant Heating & Cooling SystemsPage Page Page TEMPERATURES START-UPCHECKLISTELECTRICAL PRESSURES