Carrier 39LE, 39LB, 39LD, 39LA, 39LC Fan Discharge Positions, Fans without IGVs, Wire Size Load Amps

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Table 11 — Field Wiring for Incoming Conductors

Sized for 125% of Heater Load

WIRE SIZE

LOAD AMPS*

WIRE SIZE

LOAD AMPS*

(AWG or kcmil)

Copper

(AWG or kcmil)

Copper

12

16

1/0

120

10

24

2/0

140

8

40

3/0

160

6

52

4/0

184

4

68

250

204

3

80

300

228

2

92

350

248

1

104

400

268

 

 

500

304

LEGEND

AWG — American Wire Gage kcmil — Thousand Circular Mils

*Values are based on Table 310-16 of the NEC (National Electrical Code) for 75 C insulated copper wire. Not more than 3 conductors in a raceway.

NOTES:

1.Be sure to consider length of wiring run and possible voltage drops when sizing wires.

2.Field power wiring — Heaters are furnished with a terminal block sized for incoming copper conductors with 75 C insulation rated to carry at least 125% of the heater load. However, con- ductors can be sized to carry 100% of the heater load if the heater is rated at 50 kW or more, and the heater is controlled by a cycling device such as a multi-stage thermostat, step control- ler, or SCR (silicon control rectifier) power controller. Terminal blocks and knockouts are sized to handle either 100% or 125% conductors.

Discharge Modification — If field modification of discharge position is required, 39L fans can be converted (by a skilled mechanic) to any standard hand and discharge without any additional parts. (NOTE: This does not apply to a model change conversion.) All mounting holes are prepunched.

To convert a 39L fan, note the following:

1.Sizes 03-18 without inlet guide vanes (IGVs) — See Fig. 33. It is not necessary to remove the bearing support channels from the fan housing.

Sizes 21 and 25 without IGV and 06-25 with IGVs — See Fig. 34. The “A” frame support must be removed. To change from upblast to horizontal discharge or from horizontal to upblast discharge, the bearings must be relocated to keep the wheel centered in the housing. To change from upblast front (UBF) to upblast rear (UBR) or from top horizontal front (THF) to top horizontal rear (THR) or vice versa, turn the entire fan housing 180 de- grees about its base.

2.Inlet guide vane actuators and linkages, where provided, may be moved to the opposite fan scroll side sheet. NOTE: The swivel joint must be at the 12 o’clock posi- tion on the IGV assembly. (See Fig. 12.) The jackshaft crankarm, attached to the jackshaft at the “A” frame, will sit vertically up on all units. Figure 12 illustrates a jack- shaft crankarm in the vertical up position.

3.The fan shaft may be driven out and reinstalled to place the drive pulley on the opposite end.

4.The fan scroll is prepunched for horizontal or vertical dis- charge to match the support angles at the base of the unit.

5.The motor and motor base may be rotated to place the motor at the front or rear of the unit. Proper location is that which results in the longest drive center line distance. The motor conduit box location may need to be reversed.

6.When hand of fan is changed, it may be necessary to turn the discharge panel inside-out to fit correctly with the fan discharge. In this case, remove the existing insulation and install new duct-liner type insulation on the opposite side of the discharge panel.

7.Rebalancing of the unit is recommended.

LEGEND

THF — Top Horizontal Front

THR — Top Horizontal Rear

UBF — Upblast Front

UBR — Upblast Rear

Fig. 33 — Fan Discharge Positions, Fans without IGVs

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Contents Contents → Safety ConsiderationsIntroduction Unit IdentificationPage Preinstallation Service Area Requirements SizePhysical Data Unit SizeUnit Rigging Details Installation Mixing BoxMixing Box Damper Operating Torque In.-lb 39L Unit Size TorqueRecommended Actuators Page Install Sheaves on Motor and Fan Shafts IGV Actuator Bracket InstallationDetermining Sheave-Shaft Overhang Belt Small Deflection Force LB Sheave CrossPD Range SectionWater and Steam Coil Piping Recommendations Coil Freeze-Up ProtectionLow, 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 Small Face Area 39LB, 39LC, 39LF Unit Size Circuiting Type ROW COIL††Side Connector Hot Gas Bypass Data Distributor Part Numbers= 1.68 x .33 x Face Split Coil Manifolding Typical Electric Heater Installation Typical Electric Heater Wiring Schematic Electric Heater Data Steps FLAWire Size Load Amps Fan Discharge Positions, Fans without IGVsSTART-UP Bolt Size TorqueService Fan Motor ReplacementCoil Cleaning GeneralField-Installed Coils 39LA,LD Only Coil RemovalHorizontal Unit Slant Coil Removal 39LA Units Sizes Vertical Unit Slant Coil Removal 39LD Units Sizes Page Changing Coil Hand Fan Shaft Bearing Removal FiltersDX and ALL Water Coils Steam Coils Only Filter Data Filter Arrangement, 2-in. and 4-in. FlatLubrication Lubricant DataManufacturer Lubricant 39L Unit Size Cutoff Cutoff ClearanceMetric 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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