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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.
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