Bryant 551A Unit STD Unit ECONOMI$ER Corner DIM a DIM B DIM C Weight, 963 1092 559

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4

UNIT

STD UNIT

ECONOMI$ER

CORNER

CORNER

CORNER

CORNER

DIM A

DIM B

DIM C

WEIGHT

WEIGHT

 

A

 

B

 

C

 

D

551A

 

 

 

 

 

 

 

 

 

 

Lb

Kg

Lb

Kg

Lb

 

Kg

Lb

 

Kg

Lb

 

Kg

Lb

 

Kg

ft-in.

mm

ft-in.

mm

ft-in.

mm

 

 

 

 

 

155

1575

714

80

36.3

407

 

185

375

 

170

383

 

174

410

 

186

3-5

1039

3-5

1054

1-10

559

180

1650

748

80

36.3

375

 

170

375

 

170

449

 

204

452

 

205

3-2

963

3-7

1092

1-10

559

NOTES:

1.Refer to print for roof curb accessory dimensions.

2.Dimensions in ( ) are in millimeters.

3. Center of Gravity.

4. Direction of airflow.

5.Ductwork to be attached to accessory roof curb only.

6.Minimum clearance:

Rear: 7-0(2134) for coil removal. This dimension can be reduced to 4-0(1219) if conditions permit coil removal from the top.

Left side: 4-0(1219) for proper condenser coil airflow.

Front: 4-0(1219) for control box access.

Right side: 4-0(1219) for proper operation of damper and power exhaust if so equipped.

Top: 6-0(1829) to assure proper condenser fan operation.

Local codes or jurisdiction may prevail.

7.With the exception of clearance for the condenser coil and the damper/ power exhaust as stated in Note #6, a removable fence or barricade requires no clearance.

8.Dimensions are from outside of corner post. Allow 0-5/16(8) on each side for top cover drip edge.

9.See drawing 50TJ500352 for service option details.

10.A 90 degree elbow must be installed on the supply ductwork below the unit discharge for units equipped with electric heaters.

Fig. 4 — Base Unit Dimensions, 551A155 and 180

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Contents Contents Safety ConsiderationsInstallation Provide Unit Support II. RIG and Place UnitRoof Curb Details Unit Maximum Dimensions Shipping Weight Ft-in 155180 240Unit STD Unit ECONOMI$ER Corner DIM a DIM B DIM C Weight 551AFt-in 155 1575 714 36.3 407 185 375 170 383 174 410 1039 1054 559 180 1650 748 36.3 375 170 449 204 452Base Unit Dimensions, 551A240 Physical Data 155 180 240III. Field Fabricate Ductwork IV. Make Unit Duct ConnectionsTrap Condensate Drain 551A180 and 240 Shown 551A155 ShownUnit Voltage Field Control WiringNEC Electrical Data FLA LRA MCA MOCP†Electric Resistance Heater Data UnitHeater Maximum Minimum Heater Amps PERVII. Make OUTDOOR-AIR Inlet Adjustments Optional Non-Fused DisconnectOptional Convenience Outlet Manual Outdoor-Air DamperHeat Anticipator Settings VIII. Install OUTDOOR-AIR HoodOutdoor Air Enthalpy Sensor Installation Unit StageCO2 Control Setup Discharge Air Thermistor DATDry Bulb Changeover Set Up EconoMi$er Switchover Control StrategyDefault Potentiometer Settings Mechanical Cooling LockoutIX. Install ALL Accessories Ventilation Air Minimum Position Set UpMotormaster I Control Installation 551A155 and 180 Only Motormaster III Control Installation 551A240 Only Wind Baffle DetailsLlsv LPSIII. Refrigerant Service Ports Internal WiringXI. Accessory ECONOMI$ER Adjustment START-UPFreeze Protection Thermostats Units With Perfect Humidity Dehumidification PackageFan Performance 551A155 With Standard Indoor Fan Motor Watts Bhp Cfm Rpm Watts BhpWatts Bhp Rpm 3750 551A180 15 Tons 48005100 5700551A240 20 Tons Watts Bhp RpmBhp Rpm Watts 000 500Accessory/FIOP Static Pressure in. wg DropFan RPM at Motor Pulley Settings Evaporator Fan Motor SpecificationsIV. Evaporator FAN Service and Replacement Service CleaningII. Lubrication Evaporator-Fan Pulley Alignment Adjustment Belt Tension AdjustmentVI. CONDENSER-FAN Adjustment VII. ECONOMI$ER AdjustmentVIII. Power Failure IX. Refrigerant ChargeFilter Drier XI. Protective DevicesXIV. Replacement Parts XVI. Optional Hinged Access DoorsXII. Relief Devices XIII. Control CircuitTypical Wiring Schematic 551A180, 460v Shown Typical Component Arrangement 551A180 Shown Cooling Service Analysis TroubleshootingProblem Cause Remedy EconoMi$er Troubleshooting Problem Potential Cause RemedyPage Electrical TemperaturesGeneral
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