Carrier 39LC, 39LB Install Sheaves on Motor and Fan Shafts, IGV Actuator Bracket Installation

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JACKSHAFT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CRANKARM

ANTIROTATION STRAP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INSTALLED (ACTUATOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOT SHOWN FOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CLARITY)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 11 — IGV Actuator Bracket Installation

IGV ACTUATOR

CONNECTING ROD

IGV JACKSHAFT

ANTIROTATION

STRAP

INLET GUIDE

VANES (IGV)

Fig. 12 — IGV Actuator Mounting

Install Fan Motor — For field installation of motors, be sure electrical junction box is toward the center of the unit. This is necessary for drive and belts to be properly tightened. Use smallest slots in motor mounting base that will accommo- date motor and allow minimum overhang (Fig. 13). Be sure that motor holddown bolts are tight on field-installed motor.

JUNCTION BOX CONDENSATE PREVENTION — When air handlers are installed outdoors in a high humidity environ- ment or indoors where the apparatus room is used as a fresh air plenum, precautions must be taken to prevent condensation from forming inside the junction box of the internally mounted motor.

Standard installation practice is to mount the motor starter or fused disconnect box adjacent to the air handler and enclose the power wiring to the motor in flexible conduit.

The sheet metal housing of the disconnect switch or motor starter is not airtight (even when a box meeting NEMA [National Electrical Manufacturers Association] IV standards is used). Thus, warm moist air can migrate through the flexible conduit to the junction box on the motor. With the motor located inside the unit, the motor temperature is that of the cool

supply air; thus, condensate can form inside the junction box and, possibly, on the live terminal lugs.

To prevent the moist air from migrating through the conduit to the motor, seal the power wires inside the flexible conduit at the motor starter or fused disconnect.

Use a nonconductive, nonhardening sealant. Permagum (manufactured by Schnee Morehead) or sealing compound, thumb grade (manufactured by Calgon), are acceptable materials.

POWER KNOCKOUTS — Panels are not provided with knockouts for the fan motor power wiring. Openings must be drilled or punched in the exterior panels of the unit. It is recom- mended that power wiring be routed through the discharge panel whenever possible, as this panel is rarely removed for service access.

Install Sheaves on Motor and Fan Shafts —

Factory-supplied drives are prealigned and tensioned, however, Carrier recommends that you check the belt tension and align- ment before starting the unit. Always check the drive align- ment after adjusting belt tension.

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Contents → Safety Considerations ContentsUnit Identification IntroductionPage Preinstallation Size Service Area RequirementsUnit Size Physical DataUnit Rigging Details 39L Unit Size Torque InstallationMixing Box Mixing Box Damper Operating Torque In.-lbRecommended Actuators Page IGV Actuator Bracket Installation Install Sheaves on Motor and Fan ShaftsDetermining Sheave-Shaft Overhang Section Belt Small Deflection Force LB SheaveCross PD RangeCoil Freeze-Up Protection Water and Steam Coil Piping RecommendationsLow, Medium or High Pressure Coil Piping Dripping Steam Supply to Condensate Return Chilled Water Coil Circuiting Data Steam Coil Connection Sizes Face Split Coil Suction Line Piping Direct Expansion Coil Circuiting Data ROW COIL†† Small Face Area 39LB, 39LC, 39LF Unit Size Circuiting TypeDistributor Part Numbers Side Connector Hot Gas Bypass Data= 1.68 x .33 x Face Split Coil Manifolding Typical Electric Heater Installation Typical Electric Heater Wiring Schematic Steps FLA Electric Heater DataFan Discharge Positions, Fans without IGVs Wire Size Load AmpsBolt Size Torque START-UPGeneral ServiceFan Motor Replacement Coil CleaningCoil Removal Field-Installed Coils 39LA,LD OnlyHorizontal Unit Slant Coil Removal 39LA Units Sizes Vertical Unit Slant Coil Removal 39LD Units Sizes Page Changing Coil Hand DX and ALL Water Coils Steam Coils Only FiltersFan Shaft Bearing Removal Filter Arrangement, 2-in. and 4-in. Flat Filter Data39L Unit Size Cutoff Cutoff Clearance LubricationLubricant Data Manufacturer LubricantMetric Conversion Chart Copyright 2004 Carrier Corporation

39LG, 39LH03-25, 39LD, 39LE, 39LB specifications

The Carrier 39 series, encompassing models 39LA, 39LF, 39LC, 39LB, and 39LE, represents a prominent line of rooftop packaged units that combine robust performance, energy efficiency, and advanced technology for commercial applications. Designed to provide reliable heating and cooling solutions, these units stand out for their versatility and innovative features.

The 39LA model offers high efficiency and flexibility, making it ideal for various building types. It incorporates advanced economizer capabilities that enhance indoor air quality while reducing energy costs. The unit is equipped with a dual-walled cabinet, which not only improves durability but also ensures quiet operation, making it suitable for noise-sensitive environments.

The 39LF model further enhances energy savings, featuring a unique hybrid heat pump system. This system allows for both heating and cooling through an integrated design, reducing the need for separate systems and streamlining maintenance requirements. The 39LF also boasts high Seasonal Energy Efficiency Ratio (SEER) ratings, contributing to lower operating costs without compromising comfort.

The 39LC variant excels in humid climates, employing advanced dehumidification technologies that effectively manage indoor moisture levels. This model is often utilized in environments such as gyms, restaurants, and hotels where humidity control is vital. Its variable-speed compressors adjust output based on demand, optimizing energy consumption while maintaining consistent comfort levels.

The 39LB model focuses on enhanced filtration and air quality improvements. Its engineered design accommodates high-efficiency particulate air (HEPA) filters, crucial for spaces that require stringent air quality standards. This model also includes smart controls that allow for precise temperature adjustments, ensuring optimal comfort in any setting.

Finally, the 39LE unit emphasizes user-friendly interfaces and smart technology integration. The built-in Wi-Fi capability enables remote monitoring and operation, allowing managers to adjust settings from anywhere, improving overall energy management. Additionally, the 39LE’s compatibility with Building Management Systems (BMS) facilitates seamless integration into existing setups.

In summary, the Carrier 39 series 39LA, 39LF, 39LC, 39LB, and 39LE present a comprehensive array of features designed for various commercial heating and cooling applications. With an emphasis on energy efficiency, advanced air quality management, and user-friendly technology, these units continue to set the standard for rooftop packaged units in the industry. Their innovative characteristics not only enhance comfort but also promote sustainability, making them a smart choice for modern commercial environments.
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