UTS Carrier AHU Catalouge

1

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 constructionThe 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, par-tially assembled or knocked-down for on-site assembly. Technical on-site assistance from Carrier is available, if required.

■

Solid constructionWith 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 39FD50 mm for model 39FX.

■

Simple connectionThe supply duct is directly connected to the air handling unit, without transition piece.

■

AestheticsThe standard construction features profiled galvanised steel frames, and the panels are painted on the outside.

■

Easy maintenanceThe standardised components are interchangeable. Access to these components is facilitated by easily removable panels and access doors.

■

Optimum product designCarrier, 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 soft-ware.

■

ConformityConformity with applicable European environment and safety standards, and with the European performance standards.

39FD, FX 220-7100

39FD, FX

280 l/s to 27000 l/s

Air Handling Units

Quality Management System Approval

2

Contents

Symbols.................................................................................................................................................................................................3Identification..........................................................................................................................................................................................4Quick selection......................................................................................................................................................................................5Casings..................................................................................................................................................................................................6Technical data........................................................................................................................................................................................7Dampers.................................................................................................................................................................................................8Filters.....................................................................................................................................................................................................9Heat recovery systems.........................................................................................................................................................................10Plate heat recovery systems.................................................................................................................................................................10Rotary heat recovery systems..............................................................................................................................................................11Run-around coils..................................................................................................................................................................................12Electric heating coils...........................................................................................................................................................................12Coils.....................................................................................................................................................................................................13Spray humidifiers................................................................................................................................................................................14Passive silencers..................................................................................................................................................................................15Active silencers....................................................................................................................................................................................15Ventilation...........................................................................................................................................................................................16A - Fans...............................................................................................................................................................................................16B - Motors............................................................................................................................................................................................17C - Drives.............................................................................................................................................................................................17Integrated numerical control................................................................................................................................................................18Specific application examples.............................................................................................................................................................19

3

Symbols

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

ESEHEP

Door PO Rotary heat recovery section WTWH

Full-face damper

Half-face damper

RA

RM

Run-around coil EB

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 orrigid

FP

FR

Active silencer SA

Roll filter FD Fan: supply or exhaust fan

VS

VE

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 availa-ble 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.

Carrier air handling unit

Model F

D = insulation thickness 25 mm or X = insulation thickness 50 mm

Height in modules M

Width in modules M

0 = cooling coil (2) in the unit4 = cooling coil (2) with external header

Unit serial number

39 F D 4 5 0

Module M = 315 mm

n = number of modulesP = 25 mm for FDP = 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 mm39FD 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.

5

Maximum air flow at finned coil section

39FD Height (H)

Width (

l

0) Speed (m/s) Speed (m/s) Maximum length (L)

mm mm 1.5 2.6 3.15 4.5 1.5 2.6 3.15 4.5 Modules mm

Flow (l/s)

Flow (m

3

/h)

220

680 680 290 500 610 860 1040 1800 2180 3110 12 3830

230

680 995 510 890 1080 1540 1850 3210 3890 5560 12 3830

240

680 1310 720 1260 1520 2170 2600 4520 5470 7810 12 3830

330

995 995 840 1450 1760 2510 3010 5220 6320 9030 12 3830

340

995 1310 1180 2040 2470 3530 4230 7340 8890 12700 12 3830

350

995 1625 1580 2730 3310 4720 5670 9820 11900 17000 12 3830

360

995 1940 1910 3320 4020 5740 6890 11940 14460 20660 12 3830

370

995 2255 2280 3960 4790 6840 8210 14240 17250 24640 12 3830

440

1310 1310 1630 2820 3420 4880 5860 10160 12310 17580 12 3830

450

1310 1625 2180 3780 4580 6540 7840 13600 16470 23530 12 3830

460

1310 1940 2650 4590 5560 7950 9540 16530 20020 28610 12 3830

470

1310 2255 3160 5480 6630 9480 11370 19710 23880 34120 12 3830

480

1310 2570 3670 6360 7710 11010 13210 22900 27740 39630 7 2255

550

1625 1625 2910 5040 6100 8720 10460 18130 21960 31380 12 3830

560

1625 1940 3530 6120 7420 10590 12710 22040 26700 38140 12 3830

570

1625 2255 4210 7300 8840 12640 15160 26280 31840 45490 12 3830

580

1625 2570 4890 8480 10280 14680 17610 30530 36990 52840 7 2255

660

1940 1940 4270 7400 8960 12800 15360 26630 32260 46090 10 3200

670

1940 2255 5090 8820 10690 15270 18320 31760 38480 54970 10 3200

680

1940 2570 5910 10250 12410 17740 21280 36890 44690 63850 7 2255

770

2255 2255 5970 10340 12530 17900 21480 37230 45110 64440 10 3200

780

2255 2570 6930 12010 14560 20790 24950 43250 52400 74850 7 2255

7100

2255 3200 8860 15360 18600 26580 31890 55280 66970 95670 7 2255

External header H

l

4

224

680 835 410 710 860 1230 1480 2560 3100 4430 12 3830

234

680 1150 640 1110 1340 1910 2290 3980 4820 6880 12 3830

244

680 1465 860 1500 1810 2590 3110 5390 6530 9330 12 3830

334

995 1150 1040 1790 2180 3110 3730 6460 7830 11180 12 3830

344

995 1465 1400 2430 2950 4210 5050 8760 10610 15160 12 3830

354

995 1820 1770 3070 3720 5320 6380 11060 13400 19140 12 3830

364

995 2135 2140 3710 4500 6420 7710 13360 16190 23120 12 3830

374

995 2450 2510 4350 5270 7530 9030 15660 18970 27100 12 3830

444

1310 1465 1940 3370 4080 5830 7000 12130 14700 21000 12 3830

454

1310 1820 2460 4250 5150 7360 8840 15310 18550 26510 12 3830

464

1310 2135 2960 5140 6230 8890 10670 18500 22410 32020 12 3830

474

1310 2450 3480 6020 7300 10430 12510 21680 26270 37530 12 3830

484

1310 2765 3990 6910 8370 11960 14350 24870 30130 43040 7 2255

554

1625 1820 3270 5670 6870 9820 11780 20420 24740 35340 12 3830

564

1625 2135 3950 6850 8300 11860 14230 24670 29880 42690 12 3830

574

1625 2450 4630 8030 9730 13900 16680 28910 35030 50040 12 3830

584

1625 2765 5310 9210 11160 15940 19130 33160 40170 57390 7 2255

664

1940 2135 4780 8280 10030 14330 17190 29800 36110 51580 10 3200

674

1940 2450 5600 9700 11760 16790 20150 34930 42320 60460 10 3200

684

1940 2765 6420 11130 13480 19260 23110 40060 48540 69340 7 2255

774

2255 2450 6560 11380 13780 19690 23630 40960 49620 70890 10 3200

784

2255 2765 7530 13050 15810 22580 27100 46970 56910 81300 7 2255

7104

2255 3395 9460 16390 19860 28370 34040 59000 71480 102120 7 2255

Quick selection

The 39FD, FX unit size is determined by the air velocity at the finned coil section:

6

Casings

General

The casing of 39FD/FX units is formed by:

■

FrameThe frame is made up of 3 components:

Profiled frame (1)Forms the overall shape of the section and allows panel fix-ing.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.

Intermediate mullions (3) Recessed to accept panels and allows panel fixing.Construction: press-formed galvanised sheet steel - closed and insulated.

■

PanelsThey are made of:Externally galvanised and painted sheet metal (4).Insulation (5).Internal protection wall galvanised in solid or perforated sheet metal (6).

■

Access doorGives access to the casing to bag filters, fan section, etc. Two module widths. Hinged doors have internal and exter-nal handles (complies with CE regulations).

■

InsulationThermal insulation and sound absorption with fibreglass, density 32 kg/m

3

, non-flammable class M0, in accordance with CSTB.

Symbols

L = length in modules

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

Options

■

InsulationFibreglass 48 kg/m

3

(50 mm thickness)Rock wool 60 kg/m

3

(50 mm thickness)

■

Galvanised and painted, externally protected steel roofingMade 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 theft-proof 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 connectionsMade of class M1 metal, and connection frame made of galvanized metal.

■

LightThe 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.

■

FinishPerforated double skin inside. There are various finishes available (slatted, perforated double skin, painted inside or outside, assembly of sections from the inside etc.)

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) 25 50

Insulation type

Glass wool Glass wool

Insulation density

(kg/m

3

) 32 32

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 For acoustical calculations of the complete machine refer to the selection software values (and not only to the values given here)

125 9 12

250 16 19

500 21 24

1k 27 29

2k 27 24

4k 26 30

Note: These values are nominal values for standard machines, please consult the factory for specific applications.

Carrier laboratory

European test laboratory, approved by COFRAC

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Dampers

General

■

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, depend-ing on the damper size.

■

A manual control is installed on the service side.

■

Linkage: interconnection between dampers supplied, not installed.

Features

■ 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)

Symbols

L = length in modules (directly linked to the dimensions of the damper, which change depending on the air flow)

Example of application

9

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.

FiltersGeneral

■ 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

Symbols

L = length in modules (for general guidance only)

Note: Slide-rail mountedThe access door does not require any additional length(*) 1M = rigid(**) 2M = soft

Particle size (in microns)

Note: The indications given above are intended as comparative values only.

Standards Type of scale Efficiency scale %

ASHRAE 52-76 Gravimetric 50 65 80 90 95Opacimetric 40 50 60 70 80 90 95 98

Mil std 282 DOP 95 99.9 99.97 99.99 99.999

AFNOR

NF x 44012 Gravimetric 50 65 80 90 95Opacimetric 40 50 60 70 80 90 95 98

NF x 44013 DOP 95 99.9 99.97 99.99 99.999

EUROVENT 4/5 Gravimetric EU1 EU2 EU3 EU4Opacimetric EU5 EU6 EU7 EU8 EU9

EUROVENT 4/4 NaCl EU10 EU11 EU12 EU13 EU14

EN 779 Coarse G1 G2 G3 G4Fine F5 F6 F7 F8 F9

pr EN 1822 HEPA H10 H11 H12 H13 H14

A A PollutantsB Filters

1 Smog 2 Haze 3 Mist 4 Drizzle 5 Rain 6 Oil fire smoke 7 Fly-ashes 8 Tobacco smoke 9 Ashes10 Metallic dust11 Soot12 Cement dust13 Gas molecules14 Pigments15 Pollen16 Suspended dust17 Precipitating dust18 Heavy industrial dust19 Viruses20 Bacteria21 Hair22 Lung damaging dust23 Filters of average efficiency “G”24 Filters of high efficiency “F”25 Filters of very high efficiency “DOP”26 Activated carbon filters

Note: Frame-mountedAn access door, with the length of two modules is recommended to facilitate filter removal.

10

Plate heat recovery systemsGeneral

■ 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

Construction

■ The heat exchanger consists of aluminium plate assem-blies, 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-upDirect 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.

Features

■ Efficiency of 40 to 55%■ No electrical connection■ Air flow completely separate■ Low investment■ Low maintenance

Diagram

Three models are offered■ ES: Standard efficiency■ EH: High efficiency■ EP: With air bypass

Heat recovery systemsHeat 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-upAir flow Independent Communicating Independent IndependentApparent 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 rangePrice guide Average High High Low

11

Rotary recovery systemsGeneral

■ 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.

Options

■ Variable speed

Two models are available:

■ WT = thermal recovery coil■ WH = hygroscopic recovery coil

SymbolsL = length in modules

Features

■ Efficiency of 60 to 80%■ Compact size■ Adjustable capacity■ Hygroscopic recovery possible■ No risk of freeze-up

Diagram

Contaminated air

■ Applications with a rotary recovery coil is not recom-mended, if no contact between fresh and return air is per-mitted (hospitals, laboratories).

12

Run-around coilsGeneral

■ 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)

Symbols

L = length in modules

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

Electric heating coilsGeneral

■ The heating elements are sheathed finned elements. The number of elements is always a multiple of three, for wir-ing in star or delta arrangement, depending on the operat-ing voltage (230/400 V).

Standards compliance

■ CE standards (low voltage)

Construction

■ The electric resistance elements are mounted in a galva-nised steel frame sized to suit the internal dimensions of the air handling unit. They are prewired and include a ter-minal 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 anti-radiation screen must be inserted.

Features

■ Slide-rail installation ■ Safety thermostat with manual reset■ Sheathed stainless-steel pipes■ Anti-radiation screen for sensitive elements

Symbols

L = length in modules

13

CoilsGeneral

■ 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 coilsThey are suitable for use with hot and cold water, con-structed with copper tubes of 3/8”, 1/2” and 5/8” diameter and aluminium fins.

■ Direct expansion coilsDirect expansion coils (with one or two superimposed or overlapping circuits) are offered in 1/2” and 5/8” tubing.

■ Steam coilsThese 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.

* Except steam coils

Symbols

L = length in modules

Features

■ Counter-flow operation■ Performance calculations in accordance with ARI standards■ Coils mounted on rails■ Inclined condensate pan■ Cooling coil: manifold outlets insulated

Options

■ Drip eliminatorThe necessity to include a drip eliminator is determined automatically by the Carrier selection software, as a func-tion 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

14

Features

■ 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, effi-ciency higher than 80%.

Options

■ Support feet in galvanised painted sheet metal, 315 mm high, to compensate for the added height due to the humidi-fier sump. These feet are to be placed at the corners of all other sections.

■ Inspection light to IP55.

Spray humidifiersGeneral

■ Air humidification by spray humidifiers is obtained at con-stant 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 maxi-mum efficiency.Vertical galvanised steel eliminator plates, with a single baffle installed upstream or with a double baffle down-stream to provide droplet elimination.

■ A recirculating centrifugal pump can be fitted.■ Water treatment must comply with applicable hygiene

regulations, in accordance with the application.

Symbols

L = length in modulesDimensions in mm

Short

Long

15

Passive silencersGeneral

■ 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 attenuationSound attenuation is achieved with the aid of incombusti-ble mineral wool panels (MO), inserted into galvanised frames placed parallel to the air flow direction. The sur-faces 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

Active silencersGeneral

■ Active sound attenuation:Active sound attenuation by emission of an identical sound, opposed to the phase, is very effective in the low-frequency range (< 500 Hz).

Construction

■ Active attenuationThe 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 - microprocessorThe 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

Options

■ Active sound attenuation:High efficiencyVery high efficiencyVery high efficiency IAQ (Indoor Air Quality)

Symbols

L= length in modules

16

Features

■ Interchangeable impellers■ No corrosion■ Fully adjustable■ Integrated flexible sleeve■ Vibration absorption higher than 80%■ Independent of the housing

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 curvedBackward curvedAirfoil

Diagram

Fan type Forward curved Backward curved Airfoil

Pressure Medium High Very highRevolution speed Low High HighOptimum efficiency 65% 75% 80%Features and utilisation Cost Variable flow Variable flow

Acoustics Air conditioning IndustrialAir conditioning applications

Price indication Low Medium High

Ventilation

A - Fans

General

■ Fan laws:

The volume (Q) changes as the fan speed (n) changes

Q2 = Q1

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

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 with-out 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 cast-iron housings with rubber anti-vibration fittings, fixed to the fan frame, are supplied on sizes 800 to 1000.

■ Sizes16 forward and backward curved impeller sizes are availa-ble:180, 200, 225, 250, 280, 315, 355, 400, 450, 500, 560, 630, 710, 800, 900 and 1000.

Air flow direction

n1n2

n1n2( )

2

n1n2( )

3

17

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 motorInstalled opposite the main motor and furnished with a transmission (belts not fitted).

■ Frequency variation■ PTC protection

Symbols

L = length in modulesThe length varies depending on the fan size, motor capac-ity 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 fol-lowing 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 boxThe protection box is made of a galvanised steel grille con-struction to minimise pressure losses at the fan suction side.

■ Variable-diameter pulley available with a two-groove sys-tem and a motor capacity limited to 5.5 kW.

Diagrams

18

General

■ The numerical PIC control (PIC - Product-Integrated Con-trol) 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 pres-sure (variable air flow).

■ Variable speed controller to maintain the system static pres-sure (variable air flow).

■ Morning warm-up of the system - optimisation of starts/stops.

■ Modulating mixing damper control, using either the com-parison between the dry-bulb return temperature, the dry-bulb outdoor temperature and the outdoor air enthalpy con-tact 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 occu-

pied/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 program-mable 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 sup-ply 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 sys-tem 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

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

Return air

Supply air

Control box

Electronic modulesRelayDisconnect switchContactorMain switch

INSIDE

OUTSIDE

Integrated numerical control

19

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 constraintsDimensions in mm

39FX, including a gas burner, a cooling section and complete communicating control.Dimensions in mm

Specific application examples

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.

Manufactured by: Carrier, Montluel, France.Order No. 13990-20, November 1998. Supersedes order No. 13990-20, May 1998. Printed on Totally Chlorine Free Paper.Manufacturer reserves the right to change any product specifications without notice. Printed in the Netherlands.

Environmental Management System Approval