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Bryant 551A operation manual Adapter Roof Curb, Rigging Details

Models: 551A

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Adapter Roof Curb

NOTE: For preassembled horizontal adapter roof curb part no. CRRFCURB013A00, the accessory kit includes a factory-designed, high-static, regain transition duct. For horizontal curb part no. CRRFCURB012A00, a field-supplied transition duct is required.

Fig. 2 — Horizontal Supply Roof Curb and Horizontal

Adapter Roof Curb

UNIT		MAXIMUM				DIMENSIONS
UNIT		SHIPPING WEIGHT			A				B
551A		SHIPPING WEIGHT			A				B
		lb	kg	ft-in.			mm	ft-in.		mm
155		1625	737	6-111/	2		2121	4- 0		1219
180		1700	771	6-111/	2		2121	3-10		1168
240		1800	816	6-111/	2		2121	3- 7		1092

NOTES:

1.Dimensions in ( ) are in millimeters.

2.Refer to Fig. 4 and 5 for unit operating weights.

3.Remove boards at ends of unit and runners prior to rigging.

4.Rig by inserting hooks into unit base rails as shown. Use corner post from packaging to protect coil from damage. Use bumper boards for spreader bars.

5.Weights do not include optional EconoMi$er. Add 80 lb (36 kg) for EconoMi$er weight.

6.Weights given are for aluminum evaporator and condenser coil plate fins. Weights include electric heat.

7.Add 75 lb (34 kg) for crating on 551A155 and 180 units. Add 135 lb (61 kg) for crating on 551A240 units.

8.Add 150 lb (68 kg) for copper condenser coil. Add 280 lb (127 kg) for copper condenser and evaporator coils.

CAUTION: All panels must be in place when rigging.

Fig. 3 — Rigging Details

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Bryant 551A operation manual Adapter Roof Curb, Rigging Details

Contents

X. Step 10 — Install Humidistat for Optional CONTENTS— Install Outdoor-AirHood — Install All AccessoriesFig. 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 Fig. 6 — Air Distribution — Thru-the-Bottom III. STEP 3 — FIELD FABRICATE DUCTWORKIV. STEP 4 — MAKE UNIT DUCT CONNECTIONS V. STEP 5 — TRAP CONDENSATE DRAINFig. 10 — Condensate Drain Piping Details B. Field Control WiringFig. 11 — Field Power Wiring Connections Fig. 12 — Field Control Thermostat WiringTable 2 — Electrical Data Table 3 — Electric Resistance Heater Data —10——11— Fig. 13 — Optional Non-FusedDisconnect WiringVII. STEP 7 — MAKE OUTDOOR-AIRINLET ADJUSTMENTS Fig. 15 — EconoMi$er Damper Assembly — End ViewA.Outdoor Air Enthalpy Sensor Installation Table 4 — Heat Anticipator SettingsAdjustment Potentiometers VIII. STEP 8 — INSTALL OUTDOOR-AIRHOODAir Hood Cross-SectionalView E. CO2 Control Setup—13— Fig. 19 — Seal Strip LocationFig. 23 — Typical EconoMi$er Wiring G. Dry Bulb Changeover Set UpTable 5 — EconoMi$er Switchover Control Strategy Table 7 — Default Potentiometer Settings—15— H. Ventilation Air Minimum Position Set UpIX. STEP 9 — INSTALL ALL ACCESSORIES Fig. 24 — Typical EconoMi$er Sensor WiringFig. 25 — Wind Baffle Details —16—Fig. 26 — Motormaster I and Motormaster Humidistat Wiring Schematic 460V Unit Shown—17— Package Control Box—18— III. REFRIGERANT SERVICE PORTSV. INTERNAL WIRING XI. ACCESSORY ECONOMI$ER ADJUSTMENTD. Freeze Protection Thermostats —19——20— —21— —22— Table 11 — Fan Performance — 551A180—23— Table 12 — Fan Performance — 551A240Table 13 — Accessory/FIOP Static Pressure in. wg Fig. 29 — Perfect Humidity Operation Diagram—24— Table 14 — Perfect Humidity Dehumidification Table 15 — Fan RPM at Motor Pulley SettingsTable 16 — Evaporator Fan Motor Specifications —25—IV. EVAPORATOR FAN SERVICE AND REPLACEMENT SERVICEI. CLEANING III.EVAPORATOR FAN PERFORMANCE ADJUSTMENT Fig.Fig. 30 — Evaporator-FanPulley Alignment and AdjustmentMotor Section V. BELT TENSION ADJUSTMENT —27—VII. ECONOMI$ER ADJUSTMENT A. LED Indication VI. CONDENSER-FANADJUSTMENTFig. 33 — Condenser-FanAdjustment 551A155,180 Fig. 34 — Condenser-FanAdjustment 551A240D. High- and Low-PressureSwitches VIII. POWER FAILUREC. To Use The Cooling Charging Chart Fig. 35 — Cooling Charging ChartE. Freeze Protection Thermostat FPT XIV. REPLACEMENT PARTSXVI. OPTIONAL HINGED ACCESS DOORS —30——31— —32— TROUBLESHOOTING Table 18 — Cooling Service Analysis—33— Table 19 — EconoMi$er Troubleshooting Page ELECTRICAL TEMPERATURESI. PRE-START-UP II. START-UP