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Bryant 551A I. Pre-Start-Up, Ii. Start-Up, Electrical, Temperatures, General, Start-Upchecklist

Models: 551A

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				START-UP CHECKLIST
MODEL NO.:				SERIAL NO.:
DATE:				TECHNICIAN:

I. PRE-START-UP:

VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT

VERIFY INSTALLATION OF INDOOR FAN MOTOR ADJUSTMENT BOLT (155 UNITS) OR ADJUSTMENT BOLT AND PLATE (180, 240 UNITS)

VERIFY INSTALLATION OF OUTDOOR AIR HOOD

VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT CHECK THAT FILTERS AND SCREENS ARE CLEAN AND IN PLACE

VERIFY THAT UNIT IS LEVEL

CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE, AND VERIFY SETSCREW IS TIGHT

VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED

VERIFY THAT SCROLL COMPRESSORS ARE ROTATING IN THE CORRECT DIRECTION VERIFY THAT CRANKCASE HEATER HAS BEEN ENERGIZED FOR 24 HOURS

II. START-UP:

ELECTRICAL

SUPPLY VOLTAGE

L1-L2

L2-L3

L3-L1

COMPRESSOR AMPS — COMPRESSOR NO. 1

L1

L2

L3

— COMPRESSOR NO. 2

L1

L2

L3

SUPPLY FAN AMPS

EXHAUST FAN AMPS

ELECTRIC HEAT AMPS (IF SO EQUIPPED)

L1

L2

L31

TEMPERATURES

OUTDOOR-AIR TEMPERATURE

F DB (Dry-Bulb)

RETURN-AIR TEMPERATURE

F DB

F WB (Wet-Bulb)

COOLING SUPPLY AIR

F

ELECTRIC HEAT SUPPLY AIR (IF SO EQUIPPED)						F
PRESSURES
REFRIGERANT SUCTION	CIRCUIT NO. 1			PSIG		CIRCUIT NO. 2		PSIG
REFRIGERANT DISCHARGE CIRCUIT NO. 1				PSIG		CIRCUIT NO. 2		PSIG

VERIFY REFRIGERANT CHARGE USING CHARGING CHART ON PAGE 29.

GENERAL

ECONOMI$ER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS VERIFY INSTALLATION OF ALL OPTIONS AND ACCESSORIES

CUT ALONG DOTTED LINE

CUT ALONG DOTTED LINE

Copyright 2001 Bryant Heating & Cooling Systems

CL-1

CATALOG NO. 5355-105

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Bryant 551A operation manual I. Pre-Start-Up, Ii. Start-Up, Electrical, Temperatures, General, Start-Upchecklist

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$ER ADJUSTMENT —18——19— D. Freeze Protection Thermostats—20— —21— Table 11 — Fan Performance — 551A180 —22—Table 12 — Fan Performance — 551A240 —23—Table 13 — Accessory/FIOP Static Pressure in. wg Fig. 29 — Perfect Humidity Operation Diagram—24— Table 15 — Fan RPM at Motor Pulley Settings Table 16 — Evaporator Fan Motor Specifications—25— Table 14 — Perfect Humidity DehumidificationSERVICE I. CLEANINGIII.EVAPORATOR FAN PERFORMANCE ADJUSTMENT Fig. IV. EVAPORATOR FAN SERVICE AND REPLACEMENTand Adjustment Motor Section V. BELT TENSION ADJUSTMENT—27— Fig. 30 — Evaporator-FanPulley AlignmentVI. CONDENSER-FANADJUSTMENT Fig. 33 — Condenser-FanAdjustment 551A155,180Fig. 34 — Condenser-FanAdjustment 551A240 VII. ECONOMI$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— TROUBLESHOOTING Table 18 — Cooling Service Analysis—33— Table 19 — EconoMi$er Troubleshooting Page TEMPERATURES I. PRE-START-UPII. START-UP ELECTRICAL