Adjust Evaporator-Fan Speed - Ad | Carrier 48HJD005-007 guide

Step 9 — Adjust Evaporator-Fan Speed — Ad-

Step 9 — Adjust Evaporator-Fan Speed — Ad-

just evaporator-fan speed to meet jobsite conditions.

Tables 5A and 5B show fan rpm at motor pulley settings. Tables 6 and 7 show maximum amp draw of belt-drive motor. Table 8 shows motor nominal horsepower for evaporator-fan motors. Refer to Tables 8-25 for performance data. See Tables 26 and 27 for accessory and option static pressure drops.

BELT-DRIVE MOTORS — Fan motor pulleys are factory set for speed shown in Table 1. Check pulley alignment and belt tension prior to start-up.

NOTE: Before adjusting fan speed, make sure the new fan speed will provide an air temperature rise range as shown in Table 1.

To change fan speed:

1.Shut off unit power supply, tag disconnect.

2.Loosen belt by loosening fan motor mounting nuts. See Fig. 37.

3.Loosen movable pulley flange setscrew (see Fig. 38).

4.Screw movable flange toward fixed flange to increase speed and away from fixed flange to decrease speed. In- creasing fan speed increases load on motor. Do not ex- ceed maximum speed specified in Table 1.

5.Set movable flange at nearest keyway of pulley hub and tighten setscrew. (See Table 1 for speed change for each full turn of pulley flange.)

To align fan and motor pulleys, loosen fan pulley setscrews and slide fan pulley along fan shaft. Make angular alignment by loosening motor from mounting.

To adjust belt tension:

1.Loosen fan motor mounting nuts.

2.Slide motor mounting plate away from fan scroll for proper belt tension (1/2-in. deflection with 8 to 10 lbs of force) and tighten mounting nuts.

3.Adjust lock bolt and nut on mounting plate to secure mo- tor in fixed position.

MOTOR MOUNTING

PLATE NUTS

Fig. 37 — Belt-Drive Motor Mounting

Fig. 38 — Evaporator-Fan Pulley Adjustment

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Carrier 48HJD005-007 Adjust Evaporator-Fan Speed - Ad, Belt-Drive Motor Mounting, Evaporator-Fan Pulley Adjustment

Contents

Step 1 - Provide Unit Support CONTENTSSAFETY CONSIDERATIONS INSTALLATION 1′-4″ Fig. 1 - Roof Curb Details Fig. 3 - Condensate Drain Pan Fig. 2 - Unit Leveling Tolerances Step 7 - Make Electrical Connections Table 1 - Physical Data Table 1 - Physical Data cont 1/2″ Fig. 5 - Base Unit Dimensions - 48HJ004-0073/4″ Fig. 6 - Flue Hood Details Step 8 - Adjust Factory-Installed OptionsFig. 7 - Gas Piping Guide With Accessory Thru-the-Curb Service Connections Fig. 10 - Field Control Wiring Raceway Fig. 8 - Power Wiring ConnectionsFig. 9 - Low-Voltage Connections With or Without Economizer age is greater than 2%. Use the following formula to determine Never operate a motor where a phase imbalance in supply voltthe percent of voltage imbalance Table 2C - 48HJ High-Static Motor Units Without Electrical Convenience Outlet 208/230-V Unit Shown Fig. 11 - Accessory Field-Installed Humidistat Fig. 14 - Outdoor-Air Hood Details Fig. 13 - Typical Access Panel LocationsFig. 15 - Durablade Economizer Installed in Unit Fig. 16 - Horizontal Durablade Economizer Installation Fig. 20 - Outdoor-Air Thermostat Enthalpy Control Installation Wiring HarnessFig. 19A - Durablade Economizer Damper Minimum Position Setting Fig. 19B - Durablade Economizer Minimum Position Damper Setting Fig. 22 - Durablade Economizer Barometric Relief Damper CharacteristicsFig. 24 - Typical Access Panel Locations Fig. 25 - Exhaust Air Hood Assembly Fig. 29 - EconoMi$er Installed Fig. 28 - Rear EconoMi$er Flange InstallationFig. 26 - Outdoor-Air Hood Assembly Fig. 27 - Completed Hood Assembly POWER EXHAUST SYSTEM HIGH VOLTAGE Fig. 31 - EconoMi$er Sensor WiringFig. 33 - Typical Access Panel Locations Fig. 32 - Wiring Diagram for Power Exhaust System Potentiometers Factory Settings Fig. 34 - Supply-Air Sensor PlacementTable 4 - Default Potentiometer Settings Fig. 35 - EconoMi$er Control Adjustment Fig. 38 - Evaporator-Fan Pulley Adjustment Step 9 - Adjust Evaporator-Fan Speed - AdFig. 37 - Belt-Drive Motor Mounting Table 6 - Evaporator-Fan Motor Data - Standard Motor Table 5A - 48HJ Fan Rpm at Motor Pulley Setting With Standard MotorTable 7 - Evaporator-Fan Motor Data - High-Static Motors Table 9 - Outdoor Sound Power Total Unit Table 8 - Motor Nominal HorsepowerBels Table 12 - 48HJ005 Fan Performance - Vertical Discharge Units With Standard Motor 3-Phase Units Single-Phase Units Table 16 - 48HJ007 Fan Performance - Vertical Discharge Units With Standard Motor Table 18 - 48HJ004 Fan Performance - Horizontal Discharge Units With Standard Motor Table 20 - 48HJ005 Fan Performance - Horizontal Discharge Units With Standard Motor 3-Phase Units Package Static Pressure Drop in. wg FIOP - Factory-Installed OptionTable 26 - Economizer Static Pressure Drop in. wg Table 27 - FIOP MoistureMiser Dehumidification START-UP PRE-START-UP Operating Sequence HeatingTable 28 - Altitude Compensation When the supply-air temperature falls between 57 F and Fig. 39 - MoistureMiser Option Operation Fig. 42 - Separating Coil Sections SERVICELubrication Fig. 40 - Cleaning Condenser Coil Fig. 41 - Propping Up Top Panel Fig. 44 - Cooling Charging Chart Standard 48HJ004 Fig. 43 - Condenser-Fan AdjustmentFig. 45 - Cooling Charging Chart Standard 48HJ005 Fig. 47 - Cooling Charging Chart Standard 48HJ007 Fig. 46 - Cooling Charging Chart Standard 48HJ006 Fig. 48 - Cooling Charging Chart, 48HJ004 with Optional MoistureMiser Dehumidification Package Fig. 52 - Burner Section Details Fig. 53 - Burner Tray Details Table 29 - LED Error Code Description 48HJF005-007 - 150,000 BTUH INPUT Fig. 54 - Spark Gap AdjustmentLOW HEAT 48HJE004, 48HJD005-007 - 72,000 BTUH INPUT MEDIUM AND HIGH HEAT 48HJE005-007, 48HJF004 - 115,000 BTUH INPUT Table 30 - LED Error Code Service Analysis TROUBLESHOOTING Table 32 - Durablade Economizer Service Analysis Table 31 - Heating Service Analysis Table 33 - EconoMi$er Flash Code Identification Table 34 - EconoMi$er TroubleshootingCritical Table 35 - MoistureMiser Dehumidification Subcooler Service Analysis Compressor operates continuously Table 36 - Cooling Service Analysis 208/230 3-Phase Unit Shown Fig. 55 - Typical Wiring Schematic and Component Arrangement NOTES FOR FIG LEGEND AND NOTES FOR FIG Replaces 48HJ-17SI Page III. START-UP START-UP CHECKLIST Remove and Store in Job FileI. PRELIMINARY INFORMATION II. PRE-START-UP insert checkmark in box as each item is completed