39FD, FX. Air Handling Units. 280 l/s to l/s 39FD, FX

Transcription

1 Air Handling Units 39FD, FX Quality Management System Approval 39FD, FX 280 l/s to l/s The comprehensive range of Carrier 39F air handling units is the result of detailed research in the areas of thermal technology, aerodynamics and acoustics. The wide range of 23 models offers air flows from 280 l/s to l/s. Flexible modular construction The unique modular unit design enables Carrier to offer the right technical solution for any application, using minimum floor space. The units can be delivered in sections for indoor or outdoor installation, completely assembled, partially assembled or knocked-down for on-site assembly. Technical on-site assistance from Carrier is available, if required. Solid construction With their profiled frames and vertical reinforcements the Carrier series 39FD, FX air handling units are extremely rigid, and suitable for high-pressure applications with increased air flow. Thermal and acoustic insulation in two thicknesses: 25 mm for model 39FD 50 mm for model 39FX. Simple connection The supply duct is directly connected to the air handling unit, without transition piece. Aesthetics The standard construction features profiled galvanised steel frames, and the panels are painted on the outside. Easy maintenance The standardised components are interchangeable. Access to these components is facilitated by easily removable panels and access doors. Optimum product design Carrier, world leader in air conditioning, has a research, production and laboratory test facility that enables Carrier to propose the best technical/quality/price compromise. The technical selection is optimised by the Flex-Air software. Conformity Conformity with applicable European environment and safety standards, and with the European performance standards. 1

2 Contents...3 Identification...4 Quick selection...5 Casings...6 Technical data...7 Dampers...8 Filters...9 Heat recovery systems...10 Plate heat recovery systems...10 Rotary heat recovery systems...11 Run-around coils...12 Electric heating coils...12 Coils...13 Spray humidifiers...14 Passive silencers...15 Active silencers...15 Ventilation...16 A - Fans...16 B - Motors...17 C - Drives...17 Integrated numerical control...18 Specific application examples

3 List of base components Air flow from left to right Component Code Symbol Component Code Symbol Empty box CV Plate heat recovery section with or without bypass ES EH EP Door PO Rotary heat recovery section WT WH Full-face damper RA Run-around coil EB Half-face damper RM Internal damper RI Heating coil BC Two-way mixing box RD Cooling coil BF Three-way mixing box RT Electric heating coil BE Metallic filter FM Spray humidifier with 1 or 2 spray tree(s) HU Pleated filter FI Passive silencer SL Bag filter: soft or rigid FP FR Active silencer SA Roll filter FD Fan: supply or exhaust fan VS VE 3

4 Identification The 39FD, FX line of Carrier air handling units is based on a modular principle. The number of modules respectively in height and in width determines the cross-section available for air flow and encodes the unit size. The unit length is determined by the number and size of the component parts required. The service side (connections and access) is defined as right hand or left hand in the direction of the air flow. 39 F D Carrier air handling unit Unit serial number Model F 0 = cooling coil (2) in the unit 4 = cooling coil (2) with external header D = insulation thickness 25 mm or X = insulation thickness 50 mm Width in modules M Height in modules M Module M = 315 mm n = number of modules P = 25 mm for FD P = 50 mm for FX Examples of nominal dimensions (without damper, without pipes): 39FD length 12 modules: L = 3830 mm; l = 1625 mm and H = 1310 mm 39FD length 12 modules: L = 3830 mm; l 0 = 1625 mm and l 4 = l mm Note: For an installation with external header, the section to the right of the manifold is 155 mm longer, if the air handling unit has a length of l 0 4 modules, and 195 mm longer for l 0 > 4 modules. 4

5 Quick selection The 39FD, FX unit size is determined by the air velocity at the finned coil section: Maximum air flow at finned coil section 39FD Height (H) Width (l 0) Speed (m/s) Speed (m/s) Maximum length (L) mm mm Modules mm Flow (l/s) Flow (m 3 /h) External header H l

6 Casings The casing of 39FD/FX units is formed by: Frame The frame is made up of 3 components: Profiled frame (1) Forms the overall shape of the section and allows panel fixing. Construction: press- formed, galvanised sheet steel, closed and insulated. Corner piece (2) Allows connection of the profiled frames in three planes. Construction: press-formed, painted galvanised sheet. Modular design Painted galvanised sheet metal Double skin Fully insulated Leak tightness class A, in accordance with Eurovent 2/2 Acoustic sound absorption Assembly of sections from the outside Diagrams Intermediate mullions (3) Recessed to accept panels and allows panel fixing. Construction: press-formed galvanised sheet steel - closed and insulated. Panels They are made of: Externally galvanised and painted sheet metal (4). Insulation (5). Internal protection wall galvanised in solid or perforated sheet metal (6). Access door Gives access to the casing to bag filters, fan section, etc. Two module widths. Hinged doors have internal and external handles (complies with CE regulations). Insulation Thermal insulation and sound absorption with fibreglass, density 32 kg/m 3, non-flammable class M0, in accordance with CSTB. L = length in modules Insulation Fibreglass 48 kg/m 3 (50 mm thickness) Rock wool 60 kg/m 3 (50 mm thickness) Galvanised and painted, externally protected steel roofing Made up of several elements, protects the casing against adverse climatic conditions and against the sun. A slip joint assures leak tightness between elements (a). Sub-base, made of painted galvanised sheet steel (b). 100 mm high, permits isolation of the unit base. Adjustable feet can be added. Air inlet hood in galvanised painted sheet metal with theftproof wiremesh screen protection (c) Its size and shape prevent the ingress of water. Air discharge hood in galvanised painted sheet metal with wiremesh safety screen (d) Matches the fan size. Designed to prevent ingress of water. Flexible connections Made of class M1 metal, and connection frame made of galvanized metal. Light The assembly incorporates a bulkhead light, to IP44 or IP55, a switch, and a pre-wired connection box. The access door can include an inspection window. Finish Perforated double skin inside. There are various finishes available (slatted, perforated double skin, painted inside or outside, assembly of sections from the inside etc.) 6

7 Technical data Technical tightness, mechanical, thermal and acoustical data for the air handling unit casings. Type of air handling unit 39FD 39FX Compliance Insulation thickness (mm) Insulation type Glass wool Glass wool Insulation density (kg/m 3 ) Panel deflection Class 2 2 EN 1886 Tightness class Class A A Eurovent 2/2 Class 3A 3A EN 1886 Panel transmission factor (U) Class T3 T2 EN 1886 Casing thermal bridge Class TB3 TB3 EN 1886 Acoustic casing attenuation (db) (based on a static noise) Hz k k k Note: These values are nominal values for standard machines, please consult the factory for specific applications. For acoustical calculations of the complete machine refer to the selection software values (and not only to the values given here) Carrier laboratory European test laboratory, approved by COFRAC 7

8 Dampers These have the following main functions: - Closing off (antifreeze) - Two-way or three-way mixing - Bypass - Multizone Standards compliance: Tightness to DIN 1946/4 Construction Galvanised steel frame and assembly without welding. Blades are galvanised sheet steel of aerodynamic profile. Shafts are made of cadmium-plated steel. Bearings are made of nylon. Actuators: two or three output shafts are available, depending on the damper size. A manual control is installed on the service side. Linkage: interconnection between dampers supplied, not installed. No maintenance Low torque requirement Opposed blades Precise control Corrosion resistant Low sound level Power-assisted motor Flexible sleeve (1) Air inlet hood (2) L = length in modules (directly linked to the dimensions of the damper, which change depending on the air flow) Example of application 8

9 Filters The type and size of the particles suspended in the air must be known for selection of the correct filter systems. Standards compliance Efficiency EN 779 Installation tightness of the filter according to EN 1886 In slide rail or in frame In normal commercial sizes Bag filters with large filtration surface Long life span U-tube pressure gauge (1) Inclined tube pressure gauge (1) Pressure gauge with Magnehelic needle (1) Differential pressure switch, adjustable from 10 to 1250 Pa. (1) Pressure gauges from 0 to 500 Pa. Standards Type of scale Efficiency scale % ASHRAE Gravimetric Opacimetric Mil std 282 DOP AFNOR NF x Gravimetric Opacimetric NF x DOP EUROVENT 4/5 Gravimetric EU1 EU2 EU3 EU4 Opacimetric EU5 EU6 EU7 EU8 EU9 EUROVENT 4/4 NaCl EU10 EU11 EU12 EU13 EU14 EN 779 Coarse G1 G2 G3 G4 Fine F5 F6 F7 F8 F9 pr EN 1822 HEPA H10 H11 H12 H13 H14 Note: The indications given above are intended as comparative values only. Particle size (in microns) A B A Pollutants Filters L = length in modules (for general guidance only) 1 Smog 2 Haze 3 Mist 4 Drizzle 5 Rain 6 Oil fire smoke 7 Fly-ashes 8 Tobacco smoke 9 Ashes 10 Metallic dust 11 Soot 12 Cement dust 13 Gas molecules 14 Pigments 15 Pollen 16 Suspended dust 17 Precipitating dust 18 Heavy industrial dust 19 Viruses 20 Bacteria 21 Hair 22 Lung damaging dust 23 Filters of average efficiency G 24 Filters of high efficiency F 25 Filters of very high efficiency DOP 26 Activated carbon filters Note: Slide-rail mounted The access door does not require any additional length (*) 1M = rigid (**) 2M = soft Note: Frame-mounted An access door, with the length of two modules is recommended to facilitate filter removal. 9

10 Heat recovery systems Heat recovery system comparison table Heat recovery type Plate Enthalpic rotary Coils Caloduc (special manufacture) Machine type Single-piece Single-piece Independent Single-piece (cycle reversal version) Supply source None Electric Electric Electric (summer/winter version) Control Freeze-up Freeze-up and rotational speed Freeze-up and pump Freeze-up Air flow Independent Communicating Independent Independent Apparent efficiency 40 to 60% 60 to 80% 40 to 60% 40 to 70% Advantages - static element - easy cleaning - latent transfer - compact - flexible installation - very compact - frost threshold very low Limitations Latent transfer Flow contamination Reduced efficiency Reduced application range Price guide Average High High Low Plate heat recovery systems The plate heat recovery coil consists of several layers of plates, alternatively folded and plain so that they form flow channels. Each row of channels is arranged perpendicular to the preceding channel, and the fresh air flow and return air flow cross across the heat exchanger. Standards compliance EUROVENT 10/1 ENV 308 Efficiency of 40 to 55% No electrical connection Air flow completely separate Low investment Low maintenance Diagram Construction The heat exchanger consists of aluminium plate assemblies, installed diagonally in the casing. Silicone seals assure complete air tightness. The lower part of the casing forms a water-tight pan to recover possible condensate. Freeze-up Direct intake of fresh air into the unit might cause freezing of the heat exchanger. The critical temperature at which freezing might occur depends on the temperature and the relative humidity of the return air, as well as on the proportion of outside air to return air. The freeze-up zone must not be exceeded. Freezing can be prevented by increasing the fresh air temperature, either with preheat or by recycling a part of the return air or by bypassing a part of the outside air. L = length in modules, directly linked to the size of the heat recovery coil used. Three models are offered ES: Standard efficiency EH: High efficiency EP: With air bypass 10

11 Rotary recovery systems The rotary heat recovery coil consists of several circular layers of wavy plates. The flows created are parallel to the air flow. Standards compliance EUROVENT 10/1 Construction The thermal inertia plate layers form a wheel. This wheel is driven by a geared motor. The rotation speed is determined by the temperature conditions and the required capacity. Efficiency of 60 to 80% Compact size Adjustable capacity Hygroscopic recovery possible No risk of freeze-up Diagram Variable speed Two models are available: WT = thermal recovery coil WH = hygroscopic recovery coil L = length in modules Contaminated air Applications with a rotary recovery coil is not recommended, if no contact between fresh and return air is permitted (hospitals, laboratories). 11

12 Run-around coils Two coils, one located in the return air stream, the other in the fresh air stream are interconnected by pipes in a closed circuit. A field-supplied pump assures circulation of the heat-containing fluid. Standards compliance Performance calculation according to ARI 410 Construction (See coil) Efficiency of 40 to 60% Completely separate air flows Flexible duct arrangement Minimum size Operation possible at outside temperatures below 0 C Simple installation Simple maintenance Diagram L = length in modules Electric heating coils The heating elements are sheathed finned elements. The number of elements is always a multiple of three, for wiring in star or delta arrangement, depending on the operating voltage (230/400 V). Standards compliance CE standards (low voltage) Construction The electric resistance elements are mounted in a galvanised steel frame sized to suit the internal dimensions of the air handling unit. They are prewired and include a terminal board for power and control connections. A safety thermostat with manual reset opens at 90 C and is located on the upper side of the coil frame. If a electric heating coil is located close to a filter bank or an electric motor an antiradiation screen must be inserted. Slide-rail installation Safety thermostat with manual reset Sheathed stainless-steel pipes Anti-radiation screen for sensitive elements L = length in modules 12

13 Coils The coils are heat exchangers, made of copper tubes with aluminium fins. Several models are offered: - Water coils - Direct-expansion coils - Steam coils Standards compliance Performance calculation according to ARI 410 Construction Water coils They are suitable for use with hot and cold water, constructed with copper tubes of 3/8, 1/2 and 5/8 diameter and aluminium fins. Direct expansion coils Direct expansion coils (with one or two superimposed or overlapping circuits) are offered in 1/2 and 5/8 tubing. Steam coils These are made of inclined steel tubes and can also be made of vertical tubes. A number of rows from 1 to 8 and several fin spacings (1.6 to 4 mm) are available for all coils. Maximum operating pressure: 16 bar* Test pressure: 30 bar*. A vent and a purge are used on all water coils. Do not forget to install a trap at the condensate pan outlet. This must have a height of twice the fan pressure. Counter-flow operation Performance calculations in accordance with ARI standards Coils mounted on rails Inclined condensate pan Cooling coil: manifold outlets insulated Drip eliminator The necessity to include a drip eliminator is determined automatically by the Carrier selection software, as a function of: - The humidity of the air - Air flow velocity - Fin spacing - Fin wettability Anti-corrosion treatment Plastic eliminator Defrost thermostat Various fluids and refrigerants External manifolds * Except steam coils L = length in modules 13

14 Spray humidifiers Air humidification by spray humidifiers is obtained at constant enthalpy. Construction The spray humidifier consists of an airtight casing with a single-skin painted, galvanised sheet metal wall, assembled without welding. A constant level water pan with the following necessary connections: - Drain - Overflow - Water feed with float valve - Suction connection with screen One or two counter-flow division plates with atomising plastic spray nozzles providing a fine water mist for maximum efficiency. Vertical galvanised steel eliminator plates, with a single baffle installed upstream or with a double baffle downstream to provide droplet elimination. A recirculating centrifugal pump can be fitted. Water treatment must comply with applicable hygiene regulations, in accordance with the application. Efficiency Reduced operating cost Low maintenance Contributes to the cleaning of the air Two models are offered: Short humidifier With one row of spray nozzles directed against air flow, efficiency lower than 65%. Long humidifier. Two rows of spray nozzles directed against air flow, efficiency higher than 80%. Support feet in galvanised painted sheet metal, 315 mm high, to compensate for the added height due to the humidifier sump. These feet are to be placed at the corners of all other sections. Inspection light to IP55. L = length in modules Dimensions in mm Short Long 14

15 Active silencers Active sound attenuation: Active sound attenuation by emission of an identical sound, opposed to the phase, is very effective in the lowfrequency range (< 500 Hz). Construction Active attenuation The Quieteq system is an acoustic assembly capable of recording the fan noise and emitting an identical sound opposed to the phase direction. Control is fully automatic. It consists of: - Loudspeaker(s) - Input microphones - Output microphones - Controller - microprocessor The controller automatically adjusts the sound level to be emitted. The system can be integrated into the unit or installed separately. Energy savings, compared with a passive silencer Efficiency in low frequencies No maintenance Usable in any environment Optimum use at variable flow Improves the attenuation comfort Active sound attenuation: High efficiency Very high efficiency Very high efficiency IAQ (Indoor Air Quality) Passive silencers Passive sound attenuation: Passive attenuation uses the sound absorption properties of mineral fibres, permitting high-efficiency sound absorption in the high-frequency range (> 500 Hz). Construction Passive attenuation Sound attenuation is achieved with the aid of incombustible mineral wool panels (MO), inserted into galvanised frames placed parallel to the air flow direction. The surfaces exposed to the air currents are treated with glass wool to prevent corrosion. The standard thickness of the baffles is 200 mm. Static Efficient at high frequencies Variable length, depending on the attenuation Perforated double-skin casing/casing protected against salting-out Baffle with launchers Baffle with perforated sheet metal and cover to protect against salting-out L = length in modules L= length in modules 15

16 Ventilation A - Fans Fan laws: The volume (Q) changes as the fan speed (n) changes n1 Q2 = Q1 n2 The pressure (p) changes with the square of the speed (n) p2 = p1 The absorbed power (Pabs) changes with the cube of the speed (n) Pw2 = Pw1 n1 ( n2 ) 2 n1 ( n2 ) 3 Q = volume, n = speed, p = pressure, Pw = power. The fan curves refer to air of a specific weight of 1.2 kg/m 3 at a temperature of 20 C and at atmospheric pressure of Pa and a relative humidity of 50%. Other conditions require correction. Standards compliance All impellers are statically and dynamically balanced G 6.3 in accordance with ISO Construction Fan casings are constructed of galvanised steel sheet without welding, with a series of punched holes or welded nuts to allow the fixing of accessories such as frames or support legs. The impeller is rustproof and securely fixed to the shaft. Fan shafts are of steel machined to close tolerances and protected by anti-corrosive paint. High precision ball bearings are permanently lubricated. Single-row ball bearings are supplied on fan sizes 180 to 710. Permanently lubricated double-row bearings in castiron housings with rubber anti-vibration fittings, fixed to the fan frame, are supplied on sizes 800 to Sizes 16 forward and backward curved impeller sizes are available: 180, 200, 225, 250, 280, 315, 355, 400, 450, 500, 560, 630, 710, 800, 900 and Interchangeable impellers No corrosion Fully adjustable Integrated flexible sleeve Vibration absorption higher than 80% Independent of the housing Fan type Forward curved Backward curved Airfoil Pressure Medium High Very high Revolution speed Low High High Optimum efficiency 65% 75% 80% and utilisation Cost Variable flow Variable flow Acoustics Air conditioning Industrial Air conditioning applications Price indication Low Medium High Inlet guide vanes available on backward-curved fans, allowing a flow variation of 15% to 100%. Drain in the bottom of the fan housing Access door for inspection and cleaning Flow measurement Three double-inlet models are available: Forward curved Backward curved Airfoil Diagram Air flow direction 16

17 B - Motors and construction The motors are: - Three phase - Insulation class: F - Totally-enclosed (IP55) with metal casing, with feet - Forced ventilation - With thermal overload protection (normally closed) Standards compliance European Standard IEC 34.1 Standby motor Installed opposite the main motor and furnished with a transmission (belts not fitted). Frequency variation PTC protection L = length in modules The length varies depending on the fan size, motor capacity and air handling unit configuration. C - Drives and construction Transmission of power from motor to fan is provided by means of a set of fixed-diameter, adjustable-pitch pulleys and matching trapezoidal belts. The calculation of the power to be transmitted takes the following into consideration: - the belt transmission loss coefficient - the effect of the proximity of walls - manufacturing tolerances for each component Standards compliance NFT (belt length) NFT (trapezoidal sections) Transmission box The protection box is made of a galvanised steel grille construction to minimise pressure losses at the fan suction side. Variable-diameter pulley available with a two-groove system and a motor capacity limited to 5.5 kw. Diagrams 17

18 Integrated numerical control The numerical PIC control (PIC - Product-Integrated Control) is standard in all 39FD/FX air handling units from size 330 (external box on the machine for smaller sizes). The PIC control is only installed on indoor units, equipped with factory-mounted motors, selected and calculated by Carrier software. The 39FP control kit and the 39FW power kit offer many control options, including inputs, outputs, sensors, valves, actuators etc. Cooling coil valve control to maintain the temperature at the setpoint value for occupied or unoccupied mode. Heating coil valve control to maintain the temperature at the setpoint value for occupied or unoccupied mode. Inlet guide vane control to maintain the system static pressure (variable air flow). Variable speed controller to maintain the system static pressure (variable air flow). Morning warm-up of the system - optimisation of starts/ stops. Modulating mixing damper control, using either the comparison between the dry-bulb return temperature, the drybulb outdoor temperature and the outdoor air enthalpy contact or by calculation of the enthalpy differences. Two-position fresh air damper control. Free night-time cooling. Clock and calendar with year, date, day of the week, hours and minutes. Unit or remote occupied mode extension. Programming of the unit operating mode for eight occupied/unoccupied periods. Programming of eight occupied/unoccupied periods for supply of the optional dry contact. Programming of holidays (18 periods). Supply air temperature reset (variable flow) as a function of the ambient temperature. Demand limit (only with CCN system). Quick test tool, allowing the technician to test inputs and outputs. Logic output, permitting all-or-nothing control of a device (e.g. two-speed fan) as a function of a setpoint or programmable timer. Configurable alarm thresholds. Standards compliance CE (safety and low voltage) NF EN EMC (electromagnetic compatibility) EN (emission) EN (immunity) Programmable analogue output, allowing control of e.g. a valve or a variable-flow fan. Optional follower fan function, used to control the inlet guide vanes or the variable speed controller of the return air fan to maintain a constant flow differential between supply and return in a variable flow system. The air inlet and outlet pressure sensors must be selected on site in order to correspond to the specific dynamic system pressure. This function can maintain overpressure zones. Humidification control (staged or modulating). Smoke detection, fire extinguishing function. This option includes an ion detector. Unit-mounted user interface or remote. Permits return to the setpoints, reading the unit operating conditions and carrying out a quick test. Filter replacement alarm. Also permits activation of an automatic roll filter. Compatibility with the Carrier Comfort Network, and data transfer options, data storage, demand limiter etc. Conformance certificate Ready to use Single power connection Configuration flexibility Preset single-piece assembly External communication capability System energy optimisation Static duct pressure sensor Air flow low pressure switch Filter dirty differential pressure switch Duct high pressure switch Temperature sensor Ambient temperature sensor Defrost temperature sensor Outdoor air temperature sensor Relative ambient humidity sensor Relative duct humidity sensor High relative duct humidity sensor Smoke detector Actuator Supplied, ready to install Factory supplied, installed and pre-wired Valve Exhaust air Fresh air OUTSIDE Control box Electronic modules Relay Disconnect switch Contactor Main switch Supply air INSIDE Return air 18

19 Specific application examples The modularity and flexibility of the Carrier air handling units is clear from the data given in this document. Our technical consultants are at your disposition for any special requirements, such as packing humidifiers, vertical units etc. Double 39FD unit, adapted to low-height size constraints Dimensions in mm 39FX, including a gas burner, a cooling section and complete communicating control. Dimensions in mm 19

20 39FX fully stainless steel construction 316L, inside and outside. Circular duct connections, hygroscopic rotary heat recovery coil, copper/copper coil, multizone section, integrated control, designed in accordance with VERITAS MARINE standards for special marine applications. Environmental Management System Approval Order No , November Supersedes order No , May Manufacturer reserves the right to change any product specifications without notice. Manufactured by: Carrier, Montluel, France. Printed on Totally Chlorine Free Paper. Printed in the Netherlands.