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Bryant 551A operation manual 32

Models: 551A

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Fig. 36 — Typical Wiring Schematic (551A180, 460v Shown) (cont)

Fig. 37 — Typical Component Arrangement (551A180 Shown)

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Contents

CONTENTS — Install Outdoor-AirHood— Install All Accessories X. Step 10 — Install Humidistat for OptionalFig. 1 — Roof Curb Details Adapter Roof Curb Fig. 3 — Rigging DetailsFig. 4 — Base Unit Dimensions, 551A155 and Fig. 5 — Base Unit Dimensions, 551A240 Table 1 — Physical Data III. STEP 3 — FIELD FABRICATE DUCTWORK IV. STEP 4 — MAKE UNIT DUCT CONNECTIONSV. STEP 5 — TRAP CONDENSATE DRAIN Fig. 6 — Air Distribution — Thru-the-BottomB. Field Control Wiring Fig. 11 — Field Power Wiring ConnectionsFig. 12 - Field Control Thermostat Wiring Fig. 10 - Condensate Drain Piping DetailsTable 2 — Electrical Data —10— Table 3 — Electric Resistance Heater DataFig. 13 — Optional Non-FusedDisconnect Wiring VII. STEP 7 — MAKE OUTDOOR-AIRINLET ADJUSTMENTSFig. 15 — EconoMi$er Damper Assembly — End View —11—Table 4 — Heat Anticipator Settings Adjustment PotentiometersVIII. STEP 8 — INSTALL OUTDOOR-AIRHOOD A.Outdoor Air Enthalpy Sensor InstallationE. CO2 Control Setup —13—Fig. 19 — Seal Strip Location Air Hood Cross-SectionalViewG. Dry Bulb Changeover Set Up Table 5 — EconoMi$er Switchover Control StrategyTable 7 — Default Potentiometer Settings Fig. 23 — Typical EconoMi$er WiringH. Ventilation Air Minimum Position Set Up IX. STEP 9 — INSTALL ALL ACCESSORIESFig. 24 — Typical EconoMi$er Sensor Wiring —15——16— Fig. 25 — Wind Baffle DetailsHumidistat Wiring Schematic 460V Unit Shown —17—Package Control Box Fig. 26 — Motormaster I and MotormasterIII. REFRIGERANT SERVICE PORTS V. INTERNAL WIRINGXI. ACCESSORY ECONOMI$ER ADJUSTMENT —18——19— D. Freeze Protection Thermostats—20— Page Table 11 — Fan Performance — 551A180 —22—Table 12 — Fan Performance — 551A240 —23——24— Table 13 — Accessory/FIOP Static Pressure in. wgFig. 29 — Perfect Humidity Operation Diagram Table 15 — Fan RPM at Motor Pulley Settings Table 16 — Evaporator Fan Motor Specifications—25— Table 14 — Perfect Humidity DehumidificationSERVICE I. CLEANINGIII.EVAPORATOR FAN PERFORMANCE ADJUSTMENT Fig. IV. EVAPORATOR FAN SERVICE AND REPLACEMENTand Adjustment Motor Section V. BELT TENSION ADJUSTMENT—27— Fig. 30 — Evaporator-FanPulley AlignmentVI. CONDENSER-FANADJUSTMENT Fig. 33 — Condenser-FanAdjustment 551A155,180Fig. 34 — Condenser-FanAdjustment 551A240 VII. ECONOMI$ER ADJUSTMENT A. LED IndicationVIII. POWER FAILURE C. To Use The Cooling Charging ChartFig. 35 — Cooling Charging Chart D. High- and Low-PressureSwitchesXIV. REPLACEMENT PARTS XVI. OPTIONAL HINGED ACCESS DOORS—30— E. Freeze Protection Thermostat FPT—31— —32— —33— TROUBLESHOOTINGTable 18 — Cooling Service Analysis Table 19 — EconoMi$er Troubleshooting Page I. PRE-START-UP II. START-UPELECTRICAL TEMPERATURES