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Bryant 551A 17, Package Control Box, Motormaster I and Motormaster, Sensor Locations

Models: 551A

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Page 17

Image 17

Fig. 28 — Typical Perfect Humidity Dehumidification

Package Control Box

	MOTORMASTER
	SENSOR
NOTES:	LOCATION

1. All sensors are located on
the eighth hairpin up from
the bottom.
2. Field-installed tubing insu-
lation is required to be
installed over the TXV bulb
and capillary tube				for
proper	operation		at	low
ambients.		Tubing	insula-
tion is only required on the
portion	of	suction		line
located	between		indoor
and outdoor section.				HAIRPIN END

Fig. 26 — Motormaster® I and Motormaster III

Sensor Locations

	LEGEND
CB	— Circuit Breaker
LLSV	— Liquid Line Solenoid Valve
LPS	— Low-Pressure Switch
TB	— Terminal Block

TRAN — Transformer

Fig. 27 — Typical Perfect Humidify™ Dehumidification Package

Humidistat Wiring Schematic (460V Unit Shown)

—17—

Page 17

Image 17

Bryant 551A operation manual 17, Package Control Box, Motormaster I and Motormaster, Sensor Locations

Contents

— Install Outdoor-AirHood CONTENTS— Install All Accessories X. Step 10 — Install Humidistat for OptionalFig. 1 — Roof Curb Details Fig. 3 — Rigging Details Adapter Roof CurbFig. 4 — Base Unit Dimensions, 551A155 and Fig. 5 — Base Unit Dimensions, 551A240 Table 1 — Physical Data IV. STEP 4 — MAKE UNIT DUCT CONNECTIONS III. STEP 3 — FIELD FABRICATE DUCTWORKV. STEP 5 — TRAP CONDENSATE DRAIN Fig. 6 — Air Distribution — Thru-the-BottomFig. 11 — Field Power Wiring Connections B. Field Control WiringFig. 12 — Field Control Thermostat Wiring Fig. 10 — Condensate Drain Piping DetailsTable 2 — Electrical Data Table 3 — Electric Resistance Heater Data —10—VII. STEP 7 — MAKE OUTDOOR-AIRINLET ADJUSTMENTS Fig. 13 — Optional Non-FusedDisconnect WiringFig. 15 — EconoMi$er Damper Assembly — End View —11—Adjustment Potentiometers Table 4 — Heat Anticipator SettingsVIII. STEP 8 — INSTALL OUTDOOR-AIRHOOD A.Outdoor Air Enthalpy Sensor Installation—13— E. CO2 Control SetupFig. 19 — Seal Strip Location Air Hood Cross-SectionalViewTable 5 — EconoMi$er Switchover Control Strategy G. Dry Bulb Changeover Set UpTable 7 — Default Potentiometer Settings Fig. 23 — Typical EconoMi$er WiringIX. STEP 9 — INSTALL ALL ACCESSORIES H. Ventilation Air Minimum Position Set UpFig. 24 — Typical EconoMi$er Sensor Wiring —15—Fig. 25 — Wind Baffle Details —16——17— Humidistat Wiring Schematic 460V Unit ShownPackage Control Box Fig. 26 — Motormaster I and MotormasterV. INTERNAL WIRING III. REFRIGERANT SERVICE PORTSXI. ACCESSORY ECONOMI$ER ADJUSTMENT —18—D. Freeze Protection Thermostats —19——20— —21— —22— Table 11 — Fan Performance — 551A180—23— Table 12 — Fan Performance — 551A240—24— Table 13 — Accessory/FIOP Static Pressure in. wgFig. 29 — Perfect Humidity Operation Diagram Table 16 — Evaporator Fan Motor Specifications Table 15 — Fan RPM at Motor Pulley Settings—25— Table 14 — Perfect Humidity DehumidificationI. CLEANING SERVICEIII.EVAPORATOR FAN PERFORMANCE ADJUSTMENT Fig. IV. EVAPORATOR FAN SERVICE AND REPLACEMENTMotor Section V. BELT TENSION ADJUSTMENT and Adjustment—27— Fig. 30 — Evaporator-FanPulley AlignmentFig. 33 — Condenser-FanAdjustment 551A155,180 VI. CONDENSER-FANADJUSTMENTFig. 34 — Condenser-FanAdjustment 551A240 VII. ECONOMI$ER ADJUSTMENT A. LED IndicationC. To Use The Cooling Charging Chart VIII. POWER FAILUREFig. 35 — Cooling Charging Chart D. High- and Low-PressureSwitchesXVI. OPTIONAL HINGED ACCESS DOORS XIV. REPLACEMENT PARTS—30— E. Freeze Protection Thermostat FPT—31— —32— —33— TROUBLESHOOTINGTable 18 — Cooling Service Analysis Table 19 — EconoMi$er Troubleshooting Page I. PRE-START-UP TEMPERATURESII. START-UP ELECTRICAL