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Product Data Indoor Air Handlers - Carrier

Product data Indoor Air Handlers Nominal 1,800 to 15,000 cfm 39LA,LB,LC,LD,LF,LG,LH03-25. Indoor Air Handlers 2019 Carrier Corporation Form 39L-8PD Rev. B. Features/Benefits Carrier delivers the air Rugged pillow-block bearings are maximum thermal performance with handler components for securely fastened to the solid steel fan minimum pressure drop. Quarter cir- shafts with split collets and clamp lock- cuits are available only with 4-row many stringent specification ing devices. Bearings are rated at coils; double circuits are available with requirements. The 39L Series 200,000 hours average life. 4, 6, or 8-row coils. air Handlers are compact and Mixing boxes and filter mixing Direct expansion (DX) coils fully assembled; they boxes have parallel blades to provide Large face area coils are available with combine versatility with thorough, efficient air mixing. Damp- 4 or 6 rows, and small face area coils economical, dependable ers are sectioned and have maximum blade lengths of 50 in.

Centrifugal fans are classified according to fan wheel and blade construction. The 39L fan is selected as a double width, double inlet (DWDI) with forward curved blades. Laws of fan performance Fan laws are used to predict fan performance under chang-ing operating conditions or by fan size. They are applicable to all types of fans.

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Transcription of Product Data Indoor Air Handlers - Carrier

1 Product data Indoor Air Handlers Nominal 1,800 to 15,000 cfm 39LA,LB,LC,LD,LF,LG,LH03-25. Indoor Air Handlers 2019 Carrier Corporation Form 39L-8PD Rev. B. Features/Benefits Carrier delivers the air Rugged pillow-block bearings are maximum thermal performance with handler components for securely fastened to the solid steel fan minimum pressure drop. Quarter cir- shafts with split collets and clamp lock- cuits are available only with 4-row many stringent specification ing devices. Bearings are rated at coils; double circuits are available with requirements. The 39L Series 200,000 hours average life. 4, 6, or 8-row coils. air Handlers are compact and Mixing boxes and filter mixing Direct expansion (DX) coils fully assembled; they boxes have parallel blades to provide Large face area coils are available with combine versatility with thorough, efficient air mixing. Damp- 4 or 6 rows, and small face area coils economical, dependable ers are sectioned and have maximum blade lengths of 50 in.

2 To prevent are available with 4, 6, or 8 rows. Both performance. excess blade warping and ensure tight large and small face area coils offer closure. quarter, half, full, or double circuits for Carrier 39L Series air Handlers offer: maximum thermal performance with Horizontal and vertical draw-thru Economy minimum refrigerant pressure drop. arrangements for heating, cooling, Carrier 's 39L air Handlers may Availability of a given circuit type ventilation, and VAV (variable air save money. Factory assembled, pre- depends on unit size. For full design volume) applications aligned drives and fans reduce field flexibility, all direct expansion coils Small footprint assures rigging ease installation expense. have at least 2 splits; a coil can be and reduced space requirements matched with 1 or 2 compressors for Small envelope size is easy to rig independent refrigerant systems. High-efficiency fan minimizes surg- and ensures economical use of building ing and turbulence and reduces space.

3 Quicker, easier installation and Hot water coils operating costs set up reduce start-up costs. Hot water (U-bend) coils provide heat- Exclusive Nu-Fin coil surface Hinged access doors on most sec- ing capability for a complete range of provides peak heat transfer tions ease service and promote regular applications. One-row coils are offered Optional double wall construction maintenance, saving time and money. with half circuits, and 2-row coils are Coil flexibility offered with both half and full circuits. Dependable performance The 39L units offer a wide selection of Steam coils Galvanized steel panels ensure structural integrity under all operating coils for cooling, heating, preheat with Inner Distributing Tube (IDT) steam conditions. Double-walled hinged cooling, or cooling with reheat applica- coils have 1-in. OD copper tubes and access doors also enhance structural tion. Standard 39L coils have galva- aluminum or copper plate fins with 6, stability and provide fast, easy access.

4 Nized steel casings; inlet and outlet 9, or 12 fins-per-inch. The steam coils connections are always on the same have a broad operating pressure range;. Sloped, double-wall stainless end, regardless of circuiting, and can up to 175 psig at 400 F and up to steel drain pan controls condensate be specified as right-hand or left-hand 300 psig at 300 F. Steam coils are and is self-draining; complies with connections. especially suited to applications where ASHRAE (American Society of Heat- subfreezing air enters the air handler, ing, Refrigerating and Air-Conditioning Chilled water, hot water, and direct expansion coils have non-ferrous head- or where uniform temperature of the Engineers) Standard existing air is required. ers designed to minimize pressure Internally mounted motors and drop. All coils have 1/2-in. OD copper Electric heat coils drives are installed and aligned at the tubes and Nu-Fin fins that are mechani- cally bonded to the coils for enhanced Electric heat coils can be ordered for factory.

5 Because they are contained in factory installation into the Carrier a cooled, filtered, dehumidified heat transfer. Aluminum or copper fins are available with spacings of 8, 11, or preheat-electric (PHE) section. The airstream, motor bearings and belts PHE section is equipped with full- have less wear and require less 14 fins-per-inch. Copper-fin coils also have stainless steel casings. support slide tracks for easy field servicing. Internal mounting also service. All electric heaters are suitable reduces installation time, shipping Chilled water coils for both constant volume (CV) and damage, and vandalism. VAV applications. Large face area coils are available with Precision-balanced fan wheels 4 or 6 rows, and small face area coils limit vibration and eliminate abnormal are available with 4, 6, or 8 rows. Both stress on bearings and other large and small face area coils offer components.

6 Quarter, half, full, or double circuits for Table of contents Page Features/Benefits .. 2. AHRI Certification .. 3. Model Number Nomenclature .. 3. Application data .. 5. Selection Procedure .. 14. Performance data .. 17. Physical data .. 20. Guide Specifications .. 37. 2. AHRI certification The Air-Conditioning, Heating and Refrigeration Institute (AHRI) is a voluntary, nonprofit organization comprised of the manufacturers of air conditioning, refrigeration, and heating products. More than 90% of the air conditioning and refrigeration machinery and components manufac- tured in the United States is produced by members of AHRI. Carrier 39L air Handlers are rated and certified in accor- dance with AHRI Standard 430, which is the industry stan- dard for central station air-handling units. Certification by participating manufacturers of units within the scope of this program requires that the ratings and performance of any central station unit certified to AHRI be established in accordance with the AHRI Standard.

7 The following items are not within the scope of the AHRI. Central Station Air Handlers Certification program: sound ratings electric heating coil ratings. All coils installed in the Carrier 39L air Handlers are rated in accordance with AHRI Standard 410. Chilled water, hot water, and steam coil performance is certified in accor- dance with AHRI Standard 410. Model number nomenclature 39L A 25 HC A APW A 9. Due to the complexity of the (18 position) 39L model number, use the verify model number function in the AHUB uilder software for a detailed model explanation. The description below can be used as a general model guide. Pos. 1-3: Unit Type 39L Air Handler Pos. 4: Unit Model fan/coil configuration. Refer to the diagram on page 4. Pos. 5-6: Unit Size Ranges from 03 to 25. Pos. 7-8: Draw-Thru Options Includes the sections that will make up the unit Coil Type and Arrangement Describes the coil type (chilled water, DX, heating only etc.)

8 , fins, rows and Pos. 9-12 circuit information. Pos. 13-15 fans Describes fan discharge, fan speed, and motor information. Pos. 16 Controls Describes the control offering (CV, VAV) and the components that they include. Pos. 17 Additional options Allows designation of insulation type, suspension and unit hand. Pos. 18 Special Order Allows copper fin coils and/or .025 in. wall tubes Quality Assurance ISO 9001:2015-certified processes. MEA (Materials and Acceptance) number: 131-89-E. 3. 4. POSITION 4, UNIT CONFIGURATION MODEL. (Component Sequence Also Shown). PRE-HEAT. WATER. OR. PRE-HEAT. STEAM. PHW. Model number nomenclature (cont). LEGEND. COMB. Combination PH Preheat POS. Position Application data Central station air handler fans The central station air handler is a heating, ventilating, or The 39L central station air Handlers use belt-driven centrif- air-conditioning unit that is centrally located in, or on, a ugal fans .

9 A centrifugal fan is one in which the air flows building or structure and from which air is distributed to radially through the impeller. centrifugal fans are classified desired areas through a system of ducts. according to fan wheel and blade construction. The 39L. The 39L factory packaged unit fan is selected as a double width, double inlet (DWDI) with Individual components, such as fans , coils, and filters, are forward curved blades. assembled at the factory. Laws of fan performance Packaged equipment is less costly than field-fabricated Fan laws are used to predict fan performance under chang- equipment and does not require assembly. ing operating conditions or by fan size. They are applicable The basic air-handling unit consists of a fan section and a to all types of fans . coil section. Other components, such as filter sections, air- The fan laws are stated below. The symbols used in the for- mixing boxes, access sections, and damper sections, may mulas represent the following variables: also be provided.

10 CFM Volume rate of flow through the fan. Central station configurations RPM Rotational speed of the impeller. Draw-thru units P Pressure developed by the fan. Horizontal Hp Horsepower input to the fan. D Fan wheel diameter. The fan size number can be used if it is proportional to the wheel diam- eter. W Air density, varying directly as the barometric pressure and inversely as the absolute tem- perature. Application of these laws is limited to cases where fans are Vertical ( Indoor unit only) geometrically similar. *Fan discharge may be horizontal or upblast. FAN LAWS. VARIABLE CONSTANT LAW FORMULA. CFM1 RPM1. Airflow varies directly with the Speed. =. CFM2 RPM2. SPEED. (RPM). Air Density Fan Size Distribution System Pressure varies as the square of the Speed. P1. P2. = ( RPM1. RPM2 ) 2. Horsepower varies as the cube of the Speed. Hp1. Hp2. = ( RPM1. RPM2 ) 3. CFM1 Hp1. ( ) D1 2.


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