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Bryant 581A operation manual IGC Control Heating and Cooling

Models: 581A

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Fig. 40 — IGC Control (Heating and Cooling)

Refer to Fig. 40 for IGC troubleshooting information.

LEGEND

IDM — Induced-Draft Motor

IGC — Integrated Gas Unit Controller

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

Fig. 40 — IGC Control (Heating and Cooling)

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Bryant 581A operation manual IGC Control Heating and Cooling

Contents

V. Step 5 - Install Flue Hood and Wind CONTENTSX. Step 10 - Install Outdoor-AirHood XI. Step 11 - Install All AccessoriesFig. 1 - Roof Curb Details and Roof Curbs Fig. 2 - Horizontal Adapter Roof CurbsB. Alternate Unit Support II. STEP 2 - RIG AND PLACE UNITFig. 4 - Base Unit Dimensions 581A155 and Fig. 5 - Base Unit Dimensions 581A240 Table 1 - Physical Data III. STEP 3 - FIELD FABRICATE DUCTWORK V.STEP 5 - INSTALL FLUE HOOD AND WIND BAFFLEIV. STEP 4 - MAKE UNIT DUCT CONNECTIONS Fig. 8 - Concentric Duct DetailsVII. STEP 7 - INSTALL GAS PIPING Fig. 10 - Combustion Fan Housing LocationVIII. STEP 8 - MAKE ELECTRICAL CONNECTIONS A. Field Power SupplyFig. 14 - Field Power Wiring Connections B. Field Control WiringSTEP 9 - MAKE OUTDOOR-AIRINLET ADJUSTMENTS Fig. 15 - Field Control Thermostat WiringTable 2 - Electrical Data X.STEP 10 - INSTALL OUTDOOR-AIRHOOD Fig. 17 - Economizer Damper Assembly-EndViewFig. 16 - 25% Outdoor-AirSection Details Fig. 19 - Economizer Motor ControlFig. 21 - Seal Strip Location A.Enthalpy Control InstallationFig. 22 - Outdoor-AirHood Details Fig. 23 - Outdoor-Airand Return-AirXI. STEP 11 - INSTALL ALL ACCESSORIES Fig. 24 - Psychrometric Chart for Solid-StateEnthalpy Control B. Differential Enthalpy Control Fig. 25 - Wind Baffle DetailsII. SERVICE VALVES B. Motormaster III Control Installation 581A240IV. REFRIGERANT SERVICE PORTS LocationsXII. ACCESSORY ECONOMIZER ADJUSTMENT VI. INTERNAL WIRINGVII. CRANKCASE HEATERS VIII. EVAPORATOR FANPage Page Page Page Page Page Page Table 14 - Fan RPM at Motor Pulley Setting Table 12 - Evaporator Fan Motor SpecificationsTable 11 - Air Quantity Limits Power Exhaust XIII. GAS HEAT Fig. 27 - Fan Performance Using AccessoryXIV. BASE UNIT OPERATION A. Cooling, Units Without EconomizerI. CLEANING SERVICED. Freeze Protection Thermostats E. Heating, Units With EconomizerIV. EVAPORATOR FAN SERVICE AND REPLACEMENT III.EVAPORATOR FAN PERFORMANCE ADJUSTMENT FigFig. 30 - Evaporator-FanAlignment and Adjustment II. LUBRICATION A. CompressorsVI. CONDENSER-FANADJUSTMENT V. BELT TENSION ADJUSTMENTFig. 33 - Condenser Fan Adjustment, 581A155 and Fig. 34 - Condenser Fan Adjustment, 581A240Table 16 - Economizer Checkout Procedures VII. ECONOMIZER ADJUSTMENTVIII. POWER FAILURE C. To Use the Cooling Charging ChartX. GAS VALVE ADJUSTMENT A. Natural Gas Fig. 35 - Cooling Charging ChartB. Cleaning and Adjustment XI. MAIN BURNERSXVI. REPLACEMENT PARTS D. High- and Low-PressureSwitchesXVII. DIAGNOSTIC LEDS C. Condenser-FanMotor Protection581A155225 Fig. 37 - Spark Gap Adjustment581A180270, 581A240270, AND 581A155300 581A180360 AND 581A240360Page Page ECONOMIZER OPTION/ACCESSORY Table 18 - Cooling Service Analysis TROUBLESHOOTING—35— Table 19 - Heating Service Analysis Fig. 40 - IGC Control Heating and Cooling CALL FOR FREE CATALOG PACKAGED SERVICE TRAININGPage ELECTRICAL TEMPERATURESPRESSURES GENERAL