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Bryant 558F installation instructions Vii. - Adjust Evaporator-Fanspeed, Typical Belt-DriveMotor

Models: 558F

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VII. STEP 7 — ADJUST EVAPORATOR-FAN SPEED

VII. STEP 7 — ADJUST EVAPORATOR-FAN SPEED

Adjust evaporator-fan speed to meet jobsite requirements.

Table 6 shows fan rpm at motor pulley settings, Table 7 shows motor efficiencies and Table 8 gives accessory static pressure drop. Table 9 shows motor performance. Refer to Tables 10-29 to determine fan speed settings. Fan motor pul- leys are factory set for speed shown in Tables 1A and 1B.

To change fan speed:

1.Shut off unit power supply and install lockout tag.

2.Loosen belt by loosening fan motor mounting plate nuts (see Fig. 34 and 35).

3.Loosen movable pulley flange setscrew (see Fig. 36).

4.Screw movable flange toward fixed flange to increase speed and away from fixed flange to decrease fan speed. Increasing fan speed increases load on motor. Do not exceed maximum speed specified in Tables 1A and 1B.

5.Set movable flange at nearest flat of pulley hub and tighten setscrew (see Tables 1A and 1B for speed change for each full turn of pulley flange).

To align fan and motor pulleys:

1.Loosen fan pulley setscrews.

2.Slide fan pulley along fan shaft.

3.Make angular alignment by loosening motor from mounting plate.

To adjust belt tension (see Fig. 34 and 35):

1.Loosen fan motor mounting plate nuts.

2.Units 090,091,102,103 — Slide motor mounting plate away from fan scroll for proper belt tension (1/2-in. deflection with 8 to 10 lb of force) and tighten mount- ing nuts (see Fig. 34).

MOTOR MOUNTING

PLATE NUTS

Fig. 34 — Typical Belt-Drive Motor

Mounting for Sizes 090,091,102,103

Units 120,121,150,151 — Slide motor mounting plate downward to tighten belt tension (1/2-in. deflection with 5 to 10 lb of force). Secure motor mounting plate nuts. See Fig. 35.

3.Adjust bolt and nut on mounting plate to secure motor in fixed position.

4.Check pulley alignment and realign pulleys if necessary.

Fig. 35 — Typical Belt-Drive Motor

Mounting for Sizes 120,121,150,151

Fig. 36 — Evaporator-Fan Pulley Adjustment

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Image 31

Bryant 558F Vii. - Adjust Evaporator-Fanspeed, Typical Belt-DriveMotor, Mounting for Sizes 090,091,102,103

Contents

Adjust Evaporator-FanSpeed CONTENTSIII. Step 3 - Install External Trap for Adjust Factory-InstalledIV. STEP 4 - RIG AND PLACE UNIT Fig. 1 - Horizontal Conversion PanelsA. Positioning Fig. 2 - Roof Curb Details Fig. 6 - Rigging Details Fig. 3 - Unit Leveling ToleranceFig. 5 - Condensate Drain Piping Details Fig. 4 - Condensate Drain Connection Side ViewPage Page Page ASHRAE 90.1-1999Compliant Units V.STEP 5 - MAKE ELECTRICAL CONNECTIONS A. Field Power SupplyB. Field Control Wiring Fig. 8 - Power Wiring ConnectionsPage Page Page Page Page Page Page Page Page Page Page Page B. Convenience Outlet Fig. 9 - Conduit InstallationFig. 12 - Field Control Wiring Raceway Fig. 10 - Typical Component LocationFig. 14 - Outdoor-AirHood Details Outdoor-AirDamper InstalledFig. 16 - Outdoor-AirDamper Position Setting Fig. 13 - Damper Panel with ManualFig. 17 - EconoMi$er IV Component Locations Fig. 20 - Indoor Coil Access Panel RelocationFig. 18 - Typical Access Panel Locations Fig. 22 - Filter InstallationD. EconoMi$er IV Standard Sensors Fig. 23 - EconoMi$er IV WiringFig. 25 - Outdoor-AirDamper Leakage Fig. 26 - Return-AirPressure DropE. EconoMi$er IV Control Modes Fig. 27 - Supply Air Sensor LocationTable 3 - Supply Air Sensor Temperature/Resistance ValuesSensor Mounting Location Fig. 29 - Outside Air TemperatureChangeover Set Points Fig. 30 - Return Air Temperature or Enthalpy13B C Fig. 33 - CO2 Sensor Maximum Range SettingFig. 31 - Enthalpy Changeover Set Points Fig. 32 - EconoMi$er IV ControlPage Table 5 - CO2 Sensor Standard Settings Mounting for Sizes 090,091,102,103 VII. STEP 7 - ADJUST EVAPORATOR-FANSPEEDFig. 36 - Evaporator-FanPulley Adjustment Fig. 34 - Typical Belt-DriveMotorTable 8 - Accessory/FIOP Static Pressure* in. wg Table 6 - Fan Rpm at Motor Pulley SettingsTable 7 - Evaporator-FanMotor Efficiency GENERAL FAN PERFORMANCE NOTES Table 9 - Evaporator Fan Motor DataPage Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page START-UP I. UNIT PREPARATION V. INTERNAL WIRINGVI. REFRIGERANT SERVICE PORTS PRE-START-UPXI. VENTILATION Continuous Fan X. SAFETY RELIEFVIII. COOLING A. To Shut Off UnitA.Evaporator Coil SERVICEI. CLEANING Fig. 37 - Cleaning Condenser CoilFig. 40 - Condenser Fan Adjustment IV. CONDENSER-FANADJUSTMENT FigVI. ECONOMIZER ADJUSTMENT A. Checking and Adjusting Refrigerant ChargeXI. REPLACEMENT PARTS B. To Use Cooling Charging ChartsVIII. HIGH-PRESSURESWITCH IX. LOSS-OF-CHARGESWITCHFig. 44 - Cooling Charging Chart 558F150 Fig. 43 - Cooling Charging Chart 558F120CIRCUIT NO Fig. 45 - Cooling Charging Chart 558F091 II. ECONOMI$ER IV TROUBLESHOOTING Fig. 47 - Cooling Charging Chart 558F121Fig. 48 - Cooling Charging Chart 558F151 TROUBLESHOOTING I. UNIT TROUBLESHOOTINGC.Single Enthalpy G.EconoMi$er IV Troubleshooting CompletionA. EconoMi$er IV Preparation B. Differential EnthalpyFig. 49 - Typical Unit Wiring Schematic Table 30 - Cooling Service Analysis Fig. 50 - EconoMi$er IV Functional View Table 31 - EconoMi$er IV Input/Output LogicINDEX CALL FOR FREE CATALOG SERVICE TRAININGCATALOG NO Copyright 2005 Bryant Heating & Cooling SystemsPage ELECTRICAL START-UPCHECKLIST Remove and Store in Job FileI. PRELIMINARY INFORMATION III. START-UP