Air Handling Units 39FD, FX 220-7100 Quality Management System Approval 39FD, FX 280 l/s to 27000 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 27000 l/s. Features 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 Contents Symbols .................................................................................................................................................................................................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 .............................................................................................................................................................19 2 Symbols List of base components Air flow from left to right Component Code Empty box Component Code 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 Active silencer SA Fan: supply or exhaust fan VS Bag filter: soft or rigid Roll filter Symbol Symbol FP FR FD VE 3 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 39 F D 4 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. 5 0 Carrier air handling unit Model F Unit serial number 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 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 450 - length 12 modules: L = 3830 mm; l = 1625 mm and H = 1310 mm 39FD 454 - length 12 modules: L = 3830 mm; l 0 = 1625 mm and l 4 = l 0 + 195 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 Width in modules M 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 l Height (H) Width ( 0) Speed (m/s) mm mm 1.5 2.6 Speed (m/s) 3.15 4.5 1.5 2.6 Maximum length (L) 3.15 4.5 Modules mm Flow (m3/h) Flow (l/s) 220 230 240 680 680 680 680 995 1310 290 510 720 500 890 1260 610 1080 1520 860 1540 2170 1040 1850 2600 1800 3210 4520 2180 3890 5470 3110 5560 7810 12 12 12 3830 3830 3830 330 340 350 360 370 995 995 995 995 995 995 1310 1625 1940 2255 840 1180 1580 1910 2280 1450 2040 2730 3320 3960 1760 2470 3310 4020 4790 2510 3530 4720 5740 6840 3010 4230 5670 6890 8210 5220 7340 9820 11940 14240 6320 8890 11900 14460 17250 9030 12700 17000 20660 24640 12 12 12 12 12 3830 3830 3830 3830 3830 440 450 460 470 480 1310 1310 1310 1310 1310 1310 1625 1940 2255 2570 1630 2180 2650 3160 3670 2820 3780 4590 5480 6360 3420 4580 5560 6630 7710 4880 6540 7950 9480 11010 5860 7840 9540 11370 13210 10160 13600 16530 19710 22900 12310 16470 20020 23880 27740 17580 23530 28610 34120 39630 12 12 12 12 7 3830 3830 3830 3830 2255 550 560 570 580 1625 1625 1625 1625 1625 1940 2255 2570 2910 3530 4210 4890 5040 6120 7300 8480 6100 7420 8840 10280 8720 10590 12640 14680 10460 12710 15160 17610 18130 22040 26280 30530 21960 26700 31840 36990 31380 38140 45490 52840 12 12 12 7 3830 3830 3830 2255 660 670 680 1940 1940 1940 1940 2255 2570 4270 5090 5910 7400 8820 10250 8960 10690 12410 12800 15270 17740 15360 18320 21280 26630 31760 36890 32260 38480 44690 46090 54970 63850 10 10 7 3200 3200 2255 770 780 7100 2255 2255 2255 2255 2570 3200 5970 6930 8860 10340 12010 15360 12530 14560 18600 17900 20790 26580 21480 24950 31890 37230 43250 55280 45110 52400 66970 64440 74850 95670 10 7 7 3200 2255 2255 External header l4 H 224 234 244 680 680 680 835 1150 1465 410 640 860 710 1110 1500 860 1340 1810 1230 1910 2590 1480 2290 3110 2560 3980 5390 3100 4820 6530 4430 6880 9330 12 12 12 3830 3830 3830 334 344 354 364 374 995 995 995 995 995 1150 1465 1820 2135 2450 1040 1400 1770 2140 2510 1790 2430 3070 3710 4350 2180 2950 3720 4500 5270 3110 4210 5320 6420 7530 3730 5050 6380 7710 9030 6460 8760 11060 13360 15660 7830 10610 13400 16190 18970 11180 15160 19140 23120 27100 12 12 12 12 12 3830 3830 3830 3830 3830 444 454 464 474 484 1310 1310 1310 1310 1310 1465 1820 2135 2450 2765 1940 2460 2960 3480 3990 3370 4250 5140 6020 6910 4080 5150 6230 7300 8370 5830 7360 8890 10430 11960 7000 8840 10670 12510 14350 12130 15310 18500 21680 24870 14700 18550 22410 26270 30130 21000 26510 32020 37530 43040 12 12 12 12 7 3830 3830 3830 3830 2255 554 564 574 584 1625 1625 1625 1625 1820 2135 2450 2765 3270 3950 4630 5310 5670 6850 8030 9210 6870 8300 9730 11160 9820 11860 13900 15940 11780 14230 16680 19130 20420 24670 28910 33160 24740 29880 35030 40170 35340 42690 50040 57390 12 12 12 7 3830 3830 3830 2255 664 674 684 1940 1940 1940 2135 2450 2765 4780 5600 6420 8280 9700 11130 10030 11760 13480 14330 16790 19260 17190 20150 23110 29800 34930 40060 36110 42320 48540 51580 60460 69340 10 10 7 3200 3200 2255 774 784 7104 2255 2255 2255 2450 2765 3395 6560 7530 9460 11380 13050 16390 13780 15810 19860 19690 22580 28370 23630 27100 34040 40960 46970 59000 49620 56910 71480 70890 81300 102120 10 7 7 3200 2255 2255 5 Casings General 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. Features 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/m3, non-flammable class M0, in accordance with CSTB. Symbols L = length in modules 6 Options ■ Insulation Fibreglass 48 kg/m3 (50 mm thickness) Rock wool 60 kg/m3 (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.) Technical data Technical tightness, mechanical, thermal and acoustical data for the air handling unit casings. Type of air handling unit Insulation thickness (mm) Insulation type Insulation density (kg/m3) 39FD 39FX 25 50 Glass wool Glass wool 32 32 Compliance 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 9 12 19 125 250 16 500 21 24 1k 27 29 2k 27 24 4k 26 30 For acoustical calculations of the complete machine refer to the selection software values (and not only to the values given here) Note: These values are nominal values for standard machines, please consult the factory for specific applications. Carrier laboratory European test laboratory, approved by COFRAC 7 Dampers General ■ These have the following main functions: - Closing off (antifreeze) - Two-way or three-way mixing - Bypass - Multizone Features ■ ■ ■ ■ ■ 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. Symbols L = length in modules (directly linked to the dimensions of the damper, which change depending on the air flow) Example of application 8 ■ No maintenance Low torque requirement Opposed blades Precise control Corrosion resistant Low sound level Options ■ Power-assisted motor ■ Flexible sleeve (1) ■ Air inlet hood (2) Filters General ■ 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 ■ ■ Features ■ In slide rail or in frame ■ In normal commercial sizes ■ Bag filters with large filtration surface ■ Long life span Options 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 ASHRAE 52-76 Gravimetric Opacimetric DOP 50 Gravimetric Opacimetric DOP 50 Mil std 282 Efficiency scale % 65 80 90 40 95 50 60 70 80 90 95 98 95 99.9 99.97 99.99 99.999 98 95 99.9 99.97 99.99 99.999 AFNOR NF x 44012 NF x 44013 EUROVENT 4/5 EUROVENT 4/4 EN 779 pr EN 1822 Gravimetric Opacimetric NaCl Coarse Fine HEPA 65 EU1 80 EU2 90 40 EU3 95 50 EU4 EU5 60 70 EU6 80 90 EU7 95 EU8 EU9 EU10 EU11 EU12 EU13 EU14 G1 G2 G3 G4 F5 F6 F7 F8 F9 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 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Smog Haze Mist Drizzle Rain Oil fire smoke Fly-ashes Tobacco smoke Ashes Metallic dust Soot Cement dust Gas molecules Pigments Pollen Suspended dust Precipitating dust Heavy industrial dust Viruses Bacteria Hair Lung damaging dust Filters of average efficiency “G” Filters of high efficiency “F” Filters of very high efficiency “DOP” Activated carbon filters Symbols L = length in modules (for general guidance only) 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 Heat recovery systems Heat recovery system comparison table Heat recovery type Plate Enthalpic rotary Coils Caloduc (special manufacture) Machine type Supply source Control Air flow Apparent efficiency Advantages Single-piece None Freeze-up Independent 40 to 60% - static element - easy cleaning Latent transfer Average Single-piece Electric Freeze-up and rotational speed Communicating 60 to 80% - latent transfer - compact Flow contamination High Independent Electric Freeze-up and pump Independent 40 to 60% - flexible installation Single-piece (cycle reversal version) Electric (summer/winter version) Freeze-up Independent 40 to 70% - very compact - frost threshold very low Reduced application range Low Limitations Price guide Reduced efficiency High Plate heat recovery systems General ■ 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. Features ■ Efficiency of 40 to 55% ■ No electrical connection ■ Air flow completely separate ■ Low investment ■ Low maintenance Standards compliance ■ EUROVENT 10/1 ■ ENV 308 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. ■ ■ Symbols L = length in modules, directly linked to the size of the heat recovery coil used. 10 ■ Three models are offered ES: Standard efficiency EH: High efficiency EP: With air bypass Rotary recovery systems General ■ 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. Features ■ ■ ■ ■ ■ Efficiency of 60 to 80% Compact size Adjustable capacity Hygroscopic recovery possible No risk of freeze-up Diagram Options ■ Variable speed Two models are available: ■ WT = thermal recovery coil ■ WH = hygroscopic recovery coil Symbols 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 Run-around coils General ■ 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) Features ■ 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 Symbols L = length in modules Electric heating coils General ■ 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. 12 Features ■ Slide-rail installation ■ Safety thermostat with manual reset ■ Sheathed stainless-steel pipes ■ Anti-radiation screen for sensitive elements Symbols L = length in modules Coils General ■ The coils are heat exchangers, made of copper tubes with aluminium fins. Several models are offered: - Water coils - Direct-expansion coils - Steam coils Features Standards compliance ■ Performance calculation according to ARI 410 Options ■ 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 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. ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Counter-flow operation Performance calculations in accordance with ARI standards Coils mounted on rails Inclined condensate pan Cooling coil: manifold outlets insulated Anti-corrosion treatment Plastic eliminator Defrost thermostat Various fluids and refrigerants External manifolds 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. * Except steam coils Symbols L = length in modules 13 Spray humidifiers General ■ 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. Features ■ Efficiency ■ Reduced operating cost ■ Low maintenance ■ Contributes to the cleaning of the air ■ Symbols L = length in modules Dimensions in mm Short Long 14 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%. ■ Options ■ 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. Active silencers General ■ 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. ■ Features ■ ■ ■ ■ ■ ■ 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 Passive silencers General ■ 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. ■ Features ■ Static ■ Efficient at high frequencies ■ Variable length, depending on the attenuation Options ■ Perforated double-skin casing/casing protected against salting-out ■ Baffle with launchers ■ Baffle with perforated sheet metal and cover to protect against salting-out Symbols L = length in modules Options Active sound attenuation: High efficiency Very high efficiency Very high efficiency IAQ (Indoor Air Quality) ■ Symbols L= length in modules 15 Ventilation A - Fans General ■ 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) n1 2 p2 = p1 ( n2 ) The absorbed power (Pabs) changes with the cube of the speed (n) n1 3 Pw2 = Pw1 ( n2 ) Q = volume, n = speed, p = pressure, Pw = power. The fan curves refer to air of a specific weight of 1.2 kg/m3 at a temperature of 20°C and at atmospheric pressure of 101325 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 1940. 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 1000. ■ 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 1000. Air flow direction 16 Features ■ 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 Revolution speed Optimum efficiency Features and utilisation Medium Low 65% Cost Acoustics Air conditioning Low High High 75% Variable flow Air conditioning Very high High 80% Variable flow Industrial applications High Price indication Medium Options ■ ■ ■ ■ 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 B - Motors General 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 Options ■ Standby motor Installed opposite the main motor and furnished with a transmission (belts not fitted). ■ Frequency variation ■ PTC protection Symbols L = length in modules The length varies depending on the fan size, motor capacity and air handling unit configuration. C - Drives General 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 37141 (belt length) ■ NFT 47144 (trapezoidal sections) ■ Options ■ 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 Integrated numerical control General ■ 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. Features ■ 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 60 204-1 EMC (electromagnetic compatibility) EN 50 081-2 (emission) EN 50 082-2 (immunity) Options ■ 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. Features ■ Conformance certificate ■ Ready to use ■ Single power connection ■ Configuration flexibility ■ Preset single-piece assembly ■ External communication capability ■ System energy optimisation Static duct pressure sensor Exhaust air OUTSIDE Fresh air Air flow low pressure switch Filter dirty differential pressure switch Control box Duct high pressure switch Electronic modules Relay Disconnect switch Contactor Main switch Temperature sensor Ambient temperature sensor Defrost temperature sensor Outdoor air temperature sensor Relative ambient humidity sensor Supply air Relative duct humidity sensor High relative duct humidity sensor INSIDE Smoke detector Return air Actuator Supplied, ready to install Factory supplied, installed and pre-wired Valve 18 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 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. 13990-20, November 1998. Supersedes order No. 13990-20, May 1998. 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.