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CE MARK Declaration of conformity of air handling units withEuropean directives:
„Machinery Directive 98/37/EC“„Low Voltage Directive 2006/95/EC“
GOST R certificates of conformity of air handling units with the standards and technical regulations of Russia:
Certificate of conformity with Safety RegulationsCertificate of conformity for Hygienic design Certificate of conformity for Ex design
EAC Declaration of the Customs Union of Russia for air handling units
Evidence of conformity of air handling units with the requirements of DIN 1946-4 standard Air conditioning in health care facilities „VAC systems in buildings and rooms used in the health care sector“
Sertifikati
AIR HANDLING UNITSTable of contents
About us ....................................................................................................Characteristics of air handling units .........................................................Types and designs of air handling units ...................................................Dimensions and cross-section shape ......................................................Table of cross-section sizes .....................................................................Selection diagram .....................................................................................Construction and design ..........................................................................Functional sections and selection program AirCalc ++ ........................... Fan section ............................................................................................. Filter section ............................................................................................ Heating section ...................................................................................... Cooling section ....................................................................................... Heat recovery section ............................................................................. Humidification section ............................................................................ Siphons and sound attenuation section ................................................. Dampers and flexible connections ......................................................... Lengths of functional sections ................................................................Compact air handling units with integrated cooling system .....................Air handling unit marking ..........................................................................Standard configurations ...........................................................................Automatic control of air handling unit operation .......................................
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ABOUT US
SOKO INŽINJERING company was founded in 1992. The core activity of the company is manufacturing, design, installation and servicing of equipment and systems in the field of HVAC and complete construction of mechanical, electrical and water supply systems. Since 2006, manufacturing takes place in a factory of 4000 m² in Krnjesevci near Belgrade (25 km). We have been manufacturing air handling units since 1996.
During the twenty years of work on the development of air handling units, thanks to the knowledge andprofessionalism, we have reached an enviable level in the construction solutions and quality of manufacturing. Professional, creative and flexible team is always ready for the further step in the development and applicationof new knowledge in the field of air preparation in air conditioning systems.
The space available for production and storage, as well as good organization of manufacturing processes guarantee efficiency and observance of delivery deadlines.Equipment used in the production process guaranteesa high technological level of workmanship.
The company owns the Integrated Management Systems Certificate according to the standards:ISO 9001:2008, ISO 14001:2004, OHSAS 18001:2007
MAIN CHARACTERISTICS OF MODULAR AIR HANDLING UNITS
Modular air-handling units are designed for central air preparation in air conditioning and ventilation systems in office premises, industrial buildings, warehouses, supermarkets, shopping centers, retail spaces,restaurants, hotels, residential buildings, hospitals, clinical centers etc.Air handling units provide the required purity,temperature and humidity of air through basic functions: filtration, ventilation, heating, cooling, humidification, dehumidification, heat recovery and regeneration,...
Using high quality materials in manufacturingComponents that are incorporated in air handling units are supplied by renowned world manufacturers.
48 sizes are available - with cross sections of air handling units for air flow rates from 1,000 m /h to100,000 m /h. Such a large number of sizes and modular systemallow for selection of air handling units for the needs of any building in terms of functionality and dimensions. They are characterized by excellent strength, thermal and sound insulation, minimal air leakage[D1 (M); L1 (M) and L2 (M); F9 (M); T2 and T3; TB2 and TB3] according to EN 1886 standard.
TYPES AND DESIGNS OF AIR HANDLING UNITS
Types of air handling units (according to purpose)
Intended for air conditioning and ventilation ofcommercial premises, industrial buildings, warehouses, supermarkets, retail spaces, hotels, restaurants, residential buildings, workshops, etc. Level of air filtration meets the requirements from G3to a maximum of F7. The interior of air handling unit is made of galvanized sheet metal DX51+ Zn275
STANDARD UNITS
HYGIENIC UNITS
SWIMMING POOL UNITS
Intended for air-conditioning of hospitals, clinical centers, laboratories, in pharmaceutical industry,food industry and the like. Inner surfaces of air handling units are completely smooth, with access provided to every detail for the purpose of cleaning. Interior of air handling units is made of plasticized galvanized sheet metal and (or) stainless steel. Level of air filtration is up to F9 as a standard, and atthe request absolute filters E10 to H14, UV lampsand bipolar ionizers also are installed. The design is in accordance with the standard DIN 1946.
Intended to maintain a climate in indoor swimming pools in accordance with VDI 2089. Swimming pool air handling units are supplied complete, with associated equipment to manage and control the operation. The interior of the air handling unit and all internal parts are protected with epoxy.
TYPES AND DESIGNS OF MODULAR AIR HANDLING UNITS
Designs of air handling units
HORIZONTAL DESIGN
DOUBLE HEIGHT DESIGN - Two stage units
PARALEL DESIGN - side by side units
VERTICAL DESIGN
Sections are arranged horizontally, one behindthe other, in the order of functions.
Groups of sections are arranged one above the other.
Sections (functional units) are arranged vertically,one above the other in the order of functions.
Groups of sections are arranged next to each other.
All air handling units can be adapted for outdoor mounting and can be in ATEX version.
OUTDOOR INSTALLATION ATEX VERSION
DIM
ENSI
ON
S AN
D SH
APE
OF
CRO
SS S
ECTI
ON
S
48 s
izes
of c
ross
sec
tions
are
ava
ilabl
e
Dim
ensio
ns o
f cle
ar c
ross
-sec
tion
(cle
ar in
side
dim
ensio
n) a
re d
efin
ed b
y a
mod
ular
sys
tem
, with
mod
ules
appr
ox. 3
00m
m (d
imen
sion
of th
e sm
alle
st fi
lter)
Desig
natio
n of
air
hand
ling
unit
size
repr
esen
ts th
e nu
mbe
r of m
odul
es a
long
the
widt
h an
d he
ight
of c
lear
insid
e di
men
sions
of a
ir ha
ndlin
g un
it Se
lect
ion
of th
e siz
e of
cro
ss s
ectio
n is
dete
rmin
ed b
y th
e am
ount
of a
ir th
at s
houl
d be
pre
pare
d by
air
hand
ling
unit,
co
mpl
ying
with
the
reco
mm
enda
tions
for t
he s
peed
of a
ir flo
w th
roug
h th
e cl
ear i
nsid
e di
men
sions
and
the
heat
exc
hang
ers
b x
h - d
imen
sion
of c
lear
cro
ss-s
ectio
n
S10-7
S9-7
S8-7
S7-7
S6-7
S45
S40
S35
S30
S5-6
S8-5
S7-5
S6-5
S5-5
S4-5
S25
S20
S50
2273
2273
2273
2273
2273
1978
1978
1978
1978
1978
1978
3070
2765
2475
2170
1880
3070
2475
2765
2170
1575
1880
2475
2170
1880
1575
1280
1880
1778
1675
1675
1675
1675
1675
1573
S6-4
S5-4
S4-4
S7-4
S15
S12
S3-4
S6-3
S5-3
S4-3
S3-3
S2-3
S5
S3-2
S3 S
2
S4
S7
S9
2170
1880
1670
1575
1365
1280
1280
1880
1575
1280
980
690
1280
1080
980
875
690
980
1280
1354
1354
1354
1354
1354
1354
1354
1153
1049
1049
1049
1049
1049
758
758
758
758
758
758
S12-9
S11-
9
S10-9
S9-9
S8-9
S11-8
S10-8
S9-8
S8-82587
2587
2877
2877
2877
2877
2877
2587
2587
2587
3705
3400
3112
2807
2517
3400
3112
2807
2517
2212
S7-8
1880
S5-2 1575
948
b h B HS2 606 638 690 758 440 600 1S3 791 638 875 758 625 600 1 1
S3-2 896 638 980 758 730 600 1 1S4 996 638 1080 758 815 600 2
S4-2(5) 1196 638 1280 758 1015 600 2S5-2 1491 638 1575 758 1310 600 2 1S7 22767510184908218286911
S2-3 117680449401096929606S3-3 896 929 980 1049 715 867 1 1 1 1S4-3 22768099940108219296911S5-3 1491 929 1575 1049 1285 867 2 1 2 1S6-3 337680951940108819296971S9 47690993511082133016911
S3-4 896 1234 980 1354 715 1167 2 2S4-4 1196 1234 1280 1354 990 1167 4S12 1281 1234 1365 1354 1075 1167 4 2S5-4 1491 1234 1575 1354 1285 1167 4 2S15 1586 1234 1670 1354 1380 1167 2 4S6-4 1796 1234 1880 1354 1590 1167 6S7-4 2086 1234 2170 1354 1880 1167 6 2S20 1796 1433 1880 1573 1590 1367 3 3 3S4-5 2476410995761082153516911S5-5 1491 1535 1575 1675 1285 1467 4 2 2 1S6-5 36764104515761088153516971S7-5 2086 1535 2170 1675 1830 1467 6 2 3 1S8-5 48764153125761574253511932S25 1796 1638 1880 1778 1540 1567 3 6S5-6 1491 1838 1575 1978 1285 1767 6 3
S6-6(30) 1796 1838 1880 1978 1540 1767 9S7-6(35) 2086 1838 2170 1978 1830 1767 9 3S8-6(40) 2391 1838 2475 1978 2135 1767 12S9-6(45) 2681 1838 2765 1978 2425 1767 12 3
S10-6(50) 2986 1838 3070 1978 2730 1767 15S6-7 39760204513722088133126971S7-7 2086 2133 2170 2273 1830 2067 9 3 3 1S8-7 421760253123722574233121932S9-7 2681 2133 2765 2273 2425 2067 12 3 4 1
S10-7 551760253723722070333126892S7-8 2086 2427 2212 2587 1830 2367 12 4S8-8 2391 2427 2517 2587 2135 2367 16S9-8 2681 2427 2807 2587 2425 2367 16 4
S10-8 2986 2427 3112 2587 2730 2367 20S11-8 3274 2427 3400 2587 3020 2367 20 4S8-9 461436253127782715271721932S9-9 2681 2717 2807 2877 2425 2634 16 4 4 1
S10-9 502436203727782211371726892S11-9 3274 2717 3400 2877 3020 2634 20 4 5 1S12-9 642436252337782507371729753
592x
592
490x
592
287x
592
592x
490
592x
287
287x
287
AIRHANDLING UNIT SIZE
TABLE OF SIZES BY AIR HANDLING UNIT CROSS SECTION
DIMENSIONS OF FRONTALCROSS-SECTION
CLEARCROSS-SECTIONOF EXCHANGER
SIZES AND NUMBER OF FILTERS
inside outsidelength height
SELECTION DIAGRAM FOR AIR HANDLING UNITS
This diagram is used for quick selection of appropriate size of air handling unit, depending on the amount of airand the recommended air flow velocity across clear cross-section (inside dimensions), cooling coil, heating coil..Recommended velocities are: Clear cross-section - up to 3.2 m/s
Heating coil - up to 4 m/sCooling coil - up to 3 m/sHeat exchanger - up to 3.5 m/s
Rotary heat exchanger - up to 3 m/sSteam humidifier - up to 3.5 m/sHoney comb humidifier - up to 2.8 m/s
Air velocity through the exchangerI - cooling without eliminatorII - cooling with eliminatorIII - heating
AIR FLOW RATE
AIR FLOW RATE
CONSTRUCTION AND DESIGN
Casing of air handling units
Results of the check according to EN 1886 arean indication of extraordinary strength, excellent sealing, excellent thermal and sound insulationand maximum air stream through the filters Outstanding corrosion protection: • Galvanized metal sheets are DX51+275Zn (thickness Zn19μm) • Painted metal sheets are DX51+275Zn + painted + protective film
FRAMES of casing are made of extruded aluminum profiles with associated angles. Four sizes are used, depending onthe size of air handling unit (30, 40, 50, 60 mm).The profiles are with or without thermal bridge.
BASES are made of galvanized, curved profilesand adjustable feet of adequate carrying capacity.Base height allows for installation of a siphon todrain water for all values of underpressure and overpressure in the unit.
Cross section of the casing with a display of all details:frame, floor, roof, panels, drip tray and method of sealing.
40
42
60 50
42
70 60 80
63
30
25
25
K [W/m²K] K [W/m²K]
25 0,79 25 0,79
60 0,36 42 0,50
70 0,31 42 0,50
80 0,27 63 0,34
25 1,15 25 1,15
60 0,54 42 0,75
70 0,47 42 0,75
80 0,42 63 0,52
30
90kg/m³
Insulation material [mm]
40
50
60
40
50
60
30
44kg/m³
Profile 30 Profile 40 Profile 50 Profile 60
CONSTRUCTION AND DESIGN
PANELS of air handling units are sandwich panels(on both sides, sheet metal with a filler of insulating material).Metal sheets of the panels are typically galvanized as a standard (painted or unpainted) thickness of 0.6 mm. In the hygienic design, they are typically galvanized and painted and (or) made of stainless steel.Insulating materials are: Polyurethane, density of 44 kg/mᵌ, flammability classB2 according to DIN 4102;Rock mineral wool, density of 90 kg/mᵌ with transverselyoriented fibers between the metal sheets.
Thicknesses of panels are:for the profile 40 - 42 mm vertical, 60 mm horizontal, average 50 mm for the profile 50 - 42 mm vertical, 70 mm horizontal, average 55 mm for the profile 60 - 63 mm vertical, 80 mm horizontal,average 70 mm for the profile 30 - all panels are 25 mm
THERMAL CHARACTERISTICS OF THE PANELS
Thicknessmm
Thicknessmm
HORIZONTAL PANELS VERTICAL PANELSSize of aluminum profile
POLYURETHANE
ROCK MINERAL WOOL
Connection between the outer and inner sheet metal panels is a PVC profile, which is the carrier of rubber strips and performs the interruption of thermal bridge.
CONSTRUCTION AND DESIGN
LOCKS, HINGES AND HANDLES are placed on the service side. They provide excellent tightening of rubber sealing strips (profiles). They enable easy and quick access to all the elements of air handling unit.
SIGHT GLASSES are placed on the service panels of filter, fan and humidifier sections.
SERVICE - SAFETY SWITCHES AND LIGHTING SWITCHES are mounted on the front fixed panel of the fan and humidifier section.
LIGHTING is installed in the interior of the fan,humidifier and optionally filter section.
CONNECTION SYSTEM Special connecting elements and adjustable feet allow for quick and easy connection of the sections.
FUNCTIONAL SECTIONS AND SELECTION PROGRAM AirCalc + +
The figure shows an example of air handling unit with its functional units (sections). Selection of functional sections is made in the software program "AirCalc++"
Filter Recuperator Fan Sound attenuator
Heater Steam humidifier Cooler Fan
AirCalc + is a multilingual program for the selection and calculation of air handling units. The program enables easy and quick way to choose an appropriate size, type and composition of air handling unit. Integrated calculations provide a range of valuable and necessary information about the device. Technical data provided by the program are: drawings in dwg and pdf format, specifications, energy efficiency class, display of thermodynamic processes in the h-x diagram, characteristic curves of fans, noise levels, weights...
FUNCTIONAL SECTIONS
Fan section
Fans installed in air handling units are centrifugal/radial fans, and by type:Fans with belt driveFans with direct driveFree-rotating fans without a spiral housing – Plug In fans
Main criterion for selecting the type and size of a fanis the maximum level of efficiency, which means the minimum required power of electric motor,the lowest noise level for the required amount of airand necessary pressure.
All the fans are selected using the manufacturer's certified program, which is an integral part of the AirCalc++ software.
RADIAL FANS WITH SPIRAL HOUSING AND BELT DRIVEBlades curved forward are used for lower pressures Blades curved backward are used for medium and high pressures. The fan and electric motor with pulleys and drive belts are placed on a common stand that is connected to the housing through rubber shock absorbers and flexible connections at the fan outlet. Electric motors are three-phase, asynchronous motors, type B3, protection IP55, class IE2 and IE3 according to the standard DIN EN 50347.For transmission of power, pulleys with V-belts are used (SPZ, SPA, SPB, SPC).
FREE-ROTATING FANS (Plug-in) Radial fans without spiral housing are installed with backward curved blades and direct drive, balanced according to ISO1940, with the quality grade G2.5/G6.3, and with electric motor complying with the requirements of EU/CE-MEP (ErP regul.), optimized by power, protection IP55, class IE2 and IE3. The motors are adapted for variable speed drive.
EC-FREE-ROTATING FANS (Plug-In)Unlike the previous fans, these fans have electric motor class IE4 and integrated control electronic circuitry with the possibility to control the number of revolutions by voltage using a potentiometer (10kQ) or low voltage signal (0 -10 Vdc).
ATEX
SCHOKABSORBERDETAIL
FUNCTIONAL SECTIONS
Filter section
Filters installed in air handling units in order toensure adequate purity of air, and they can bearranged in one or more stages of filtration. According to the type, filters can be: panel, bag,compact, absolute filters and active carbon filters.According to the class, filters of the class fromG2 to F9 are typically installed in compliance withthe standard EN 779; on special request, absolutefilters E10 to H14, active carbon filters, metal grease extraction filters and other filters can also be mounted. All sizes of air handling units use a combination of standard dimension filters. Filter materials can be: glass fibers, syntheticfibers and cloth.
FILTER HOLDERS with rubber gaskets (built intothe filter unit housing) ensure high class sealingof the filter F9 (M).
Detail of tightening the filter
TYPES OF FILTERS that are installed:
Panel filters Bag filters Long bag filters Compact filters Absolute filters Active carbon filters
FUNCTIONAL SECTIONS
Heating section
HEATING WITH WARM (OR HOT) WATER Heat exchangers, water (or a glycol mixture) – air,are of counter-flow type and made of copper tubes ø12mm (29x33) or ø16 mm (30x60) with aluminum fins with a spacing of 2 to 4 mm. Number of rows is 2 or greater.All parameters are calculated using a certifiedmanufacturer's program.Collecting pipes are made of steel or copper with connections up to the thread diameter of DN50 and DN50 through a flange joint. Heat exchanger frame is galvanized - as a standard,but it can be painted or made of some other material. Heaters are equipped with connections for air venting and water discharge. The tightness is checked with nitrogen under pressure of 2.5 Mpa. Maximum water temperature is 130 C. With warm-water heater, a frame - thermostat holder is delivered forfrost protection.
Flange connection Frost thermostat
ELECTRIC HEATERS Electric heaters are ribbed tubular heaters placed in a special housing made of sheet metal, together with all the necessary
elements for connection, power supply and protection.Terminal box is constructed and mounted on the outside
panel of air handling unit. They are connected to the voltage of 3x380 V/50 Hz.
Electrical wiring and connecting can be carried out for a steppedor silicon-controlled rectifier (SCR) i.e. thyristor power control.
STEAM HEATERS They use saturated steam as a medium, with absolute pressure up to 1.7 Mpa and temperatures up to 200 C. Heat exchangers are usually finned, most frequently made of galvanized steel tubes (but they can also be made of copper tubes) and aluminum fins (plates).
GAS HEATERS Heat exchangers with tubular burners and with automatic ignition
system are placed in air handling units as packaged units. These packaged units contain all the necessary operating and safety
components and fittings, which include: control gas valves, flame detector, fan that provides air for combustion and flue gas exhaust,
control panel for operating the heater. They have high energy efficiency.
All gas regulations and standards are complied with.
FUNCTIONAL SECTIONS
Cooling section
COOLING COIL WITH COLD WATER Heat exchangers, water (or a glycol mixture) – air, they are ofcounter-flow type and made of copper tubes ø12mm (29x33) orø16 mm (30x60) and aluminum fins (plates) with a spacing of 2.2to 4mm. Number of rows is 2 or greater.All parameters are calculated using a certified manufacturer's program.Collecting pipes are made of steel or copper with connections up tothe thread diameter of DN50 and DN50 through a flange joint. The heat exchanger frame is galvanized sheet metal - as a standard, but can be painted or made of other materials. Coolers are equipped with connections for air venting and water discharge.The tightness is checked with nitrogen under pressure of 2.5 Mpa.
Cooler with droplet eliminator
This unit is equipped with a drip-tray (with insulation on the bottom side) for condensate drain, made of stainless steel, and witha connection to siphon at the lowest point. For air velocities through the cooler, which are higher than2.2 m/s, a droplet eliminator is fitted behind the cooler.
DX COOLING COIL - EVAPORATOR Evaporator is made of copper tubes ø12 mm (29x33) andaluminum fins (plates) with a spacing of 2.2 to 4mm.Number of rows is 2 or greater.All parameters are calculated using a certifiedmanufacturer's program.Collecting pipes are made of copper with soldered joints.Heat exchanger frame is typically galvanized (painted forhygienic design).The tightness is checked with nitrogen under pressureof 2.5 Mpa.As a refrigerant, freon R407C, R410A, R134A, or R404A is used. Electronic or mechanical thermostatic expansion valves aremounted on evaporators.
FUNCTIONAL SECTIONS
Heat recovery section
Heat recovery section are used to save energy by extracting heat from exhaust air and delivering it to fresh air. The degree of heat recovery depends on the kind, type and size of these heat exchangers. Selection is made by certified manufacturer's programs, which are integrated in AirCalc++ software. This unit consists of a heat exchanger, fresh air filter, droplet eliminator (as required and for velocities higher than 2m/s), connection for condensate drain and "bypass" blinds (if necessary). Types of the used heat recovery systems are: plate heat exchangers, rotary heat exchangers and Coil Loop System using circulation of water and glycol mixture (run-around coils).
PLATE HEAT EXCHANGERPlate heat exchanger structure is made of specially designed fins (plates) which can be made of aluminum, painted aluminum orstainless steel, without mixing of airflows, without exchange of moisture and with or without bypass "blinds" used for frost protection. They can be of two types:cross-flow Plate heat exchanger (efficiency up to 70%) counter-flow Plate heat exchanger (efficiency up to 90%)
ROTARY HEAT EXCHANGER – Heat WheelRotaru heat exchanger structure consists of a rotating wheel(accumulation mass), electric motor with power transmission elements, and the controller of rotation speed of heat recovery wheel. They can be of two types: Condensing heat wheel with accumulation mass made of corrugated aluminum strips, and they exchange only sensible heat. Enthalpy heat wheel with a hygroscopic accumulation mass allow forthe exchange of sensible and latent heat.Efficiency depends on the speed of rotation of heat recovery wheeland reaches up to 85 %. They are suitable for large amounts of air.
Coil Loop SystemSystem with water-glycol mixturecirculation in a closed loop consists of two finned exchangers, pumps, three-way valves and other associated fittings.These are counter-flow exchangers, made from copper tubes ribbed with aluminum plates - fins with a spacing of 2.2 to 4 mm, usually from 4 to 12 rows of tubes. One heat exchanger is in the exhaust airflow and the other exchanger is in the fresh airflow. The advantage of these recuperators is that they provide completely separated flows of fresh and exhaust air, which is a basic requirement for air handling units in hygienic design.The efficiency reaches up to 55 %.
SYSTEM WITH WATER – GLYCOL CIRCULATION
Exhaust air
Exhaust air
Fresh air
Fresh air
Deliveryair
Deliveryair
Compressor
Recilculationair
Recilculationair
Evaporator
Condenser
HEAT PUMPOne more form of heat recovery with integrated freon loop. Heat of condensation is used for heating the fresh air.
FUNCTIONAL SECTIONS
Humidification section
Humidification section is part of the air handling unit where air humidification is carried out in one of the following ways:Using steam humidifiers with autonomous steam generator or with central steam preparationAdiabatic direct contact humidification(honeycomb humidifiers)Adiabatic high - pressure humidification Selection is made by certified manufacturer's programs, which are integrated in AirCalc++ software.
STEAM HUMIDIFIERSAir is humidified by direct mixing of air flow and steam. In the autonomous humidification, a steam generator is placed on the air handling unit or nextto it, steam distributor is in the air flow, whereasthese are connected by the steam supply hose.In the central steam preparation, for steam injection into the air handling unit, steam distributor with a valve and electric motor drive and with a separator is used. Steam distributors are made of stainless steel.This section is of sufficient length so that the steam is absorbed, whereas collected water droplets are drained through the drip-tray and the siphon.
ADIABATIC CONTACT HUMIDIFICATION(honeycomb humidifiers) Air humidification is achieved by the contact of air witha large wet surface, where the water evaporates.Humidifier consists of a honeycomb, system of water distribution through the honeycomb, collecting tank, pump, float valve, drain valve and droplet eliminator. It is necessary to provide connection to the system with prepared (softened) water.
HIGH-PRESSURE ADIABATIC HUMIDIFICATION High pressure water is sprayed through nozzles into the air flow. This humidification system consists of a pump station with operation controller, an assembly of nozzles and droplet eliminators. Pump station provides water pressure of 4-15 bar or 25-75 bar, depending on the type of humidifier. By means of hoses, the station is connected with an assembly of nozzles in the air handling unit. This unit section is of sufficient length to allow the air to receive dispersed droplets of water, and it is completely water-tight, with drip-tray and siphon. It is necessary to provide a connection to the system of prepared (softened) water.
With the central preparation of steam
Steam distributor
Steam generator
High-pressure humidification
SIPHONSSiphons are installed in all sections where the processes of cooling, humidification and heat recovery take place, serving for smooth drainage of water generated in these processes.The siphon height depends on the value of overpressure or underpressure in the section from which wateris discharged and it is determined by thefollowing expressions:
For overpressure zones H1 = 35 mmHs = p + 35 mm
For underpressure zones H1 = p + 35 mmHs = p x 0.6 mm
Where: p = pressure at the place of installation (mmVS) 1 mmVS = 10 Pa
PVC pipes and rubber seals are used.
Sound attenuation sectionSound attenuator splitters (silencer splitters) are made of rock wool (which is an effective sound absorber)incorporated in the frame of galvanized sheet metal and are individually mounted in the sound attenuator section. Outer surface of rock wool panels is resistant to tearing-off the pieces. On the front side of the splitters, air deflectors are mounted providing better air flow. They are made in three thicknesses: 100mm, 200mm and less frequently 300mm, for all sizes of air handling units. Lengths of splitters (depending on the desired degree of attenuation) can be 450mm to 1800mm, with a spacing of 150mm. Air speeds between the splitters are up to 15 m/s.
For overpressure
For underpressure
FUNCTIONAL SECTIONS
Mixing box
Dampers
Dampers are available with high-class sealing(class 2 according to the standard EN1751).
Flexible connections
Flexible connections prevent transmission of vibration from the air handling unit tothe duct distribution system. They are placed on all connections for air. It consists of a plastic-coated cloth with frames of galvanized MEZ-profile 20mm or 30mm (with seal and corresponding angles), length of 80mm or 30mm (when installed).
The blades are made of aluminum, with aerodynamic shape, mounted in aluminum frame with a flange. Blades are rotated slowly, with a system of gears made of injected/molded plastic, through brass squares. Excellent sealing with rubber profiles fitted on each blade and frame. For low temperature areas, gears are made of special plastic and damper heaters are also installed. Easy installation of damper actuator, as well as coupled drive in the mixing box.
FUNCTIONAL SECTIONS
S2-2(2) 690 758 240 790 840 390 550 505 705 1050 1050 1140 370
S3 875 758 240 790 840 390 550 505 705 1120 1090 1290 420
S3-2 980 758 240 790 840 390 550 505 705 1190 1090 1290 420
S4 1080 758 240 790 840 390 550 505 705 1190 1090 1290 420
S4-2(5) 1280 758 240 790 840 390 550 505 705 1190 1190 1290 440
S5-2 1575 758 240 790 840 390 550 505 705 1190 1190 1290 440
S7 1280 948 240 790 840 390 550 505 705 1190 1190 1290 440
S2-3 690 1049 240 790 840 390 550 505 705 1190 1190 1290 440
S3-3 980 1049 240 790 840 390 550 505 705 1340 1390 1490 440
S4-3 1280 1049 240 790 840 390 550 505 705 1490 1390 1540 540
S5-3 1575 1049 240 790 840 390 550 505 705 1490 1390 1540 540
S6-3 1880 1049 240 790 840 390 550 505 705 1490 1390 1540 540
S9 1280 1153 240 790 840 390 550 505 705 1540 1390 1540 590
S3-4 980 1354 240 790 840 390 550 505 705 1540 1390 1540 590
S4-4 1280 1354 240 790 840 390 550 505 705 1640 1390 1640 590
S12 1365 1354 240 790 840 390 550 505 705 1790 1690 1640 690
S5-4 1575 1354 240 790 840 390 550 505 705 1790 1690 1640 690
S15 1670 1354 240 790 840 390 550 505 705 1790 1690 1640 690
S6-4 1880 1354 240 790 840 450 550 505 705 1800 1690 1640 700
S7-4 2170 1354 240 790 840 450 550 505 705 1800 1690 1640 700
S20 1880 1573 250 800 850 500 600 550 750 1900 2200 1840 800
S4-5 1280 1675 250 800 850 500 600 550 750 2050 2200 1840 800
S5-5 1575 1675 250 800 850 500 600 550 750 2050 2200 2000 800
S6-5 1880 1675 250 800 850 500 600 550 750 2050 2200 2000 850
S7-5 2170 1675 250 800 850 500 600 550 750 2050 2200 2150 850
S8-5 2475 1675 250 800 850 500 600 550 750 2050 2200 2150 850
S25 1880 1778 250 800 850 500 600 550 750 2050 2200 2150 850
S5-6 1575 1978 250 800 850 500 600 550 750 2050 2700 2150 850
S6-6(30) 1880 1978 250 800 850 500 600 550 750 2050 2700 2300 850
S7-6(35) 2170 1978 250 800 850 500 600 550 750 2350 2700 2300 1050
S8-6(40) 2475 1978 250 800 850 500 600 550 750 2350 2700 2300 1050
S9-6(45) 2765 1978 250 800 850 500 600 550 750 2350 2700 2300 1050
S10-6(50) 3070 1978 250 800 850 500 600 550 750 2350 2700 2300 1050
S6-7 1880 2273 320 810 910 560 650 600 800 2400 2760 2360 1050
S7-7 2170 2273 320 810 910 560 650 600 800 2400 2760 2360 1050
S8-7 2475 2273 320 810 910 560 650 600 800 2660 2760 2810 1160
S9-7 2765 2273 320 810 910 560 650 600 800 2660 2760 2810 1160
S10-7 3070 2273 320 810 910 560 650 600 800 2660 2760 2810 1160
S7-8 2212 2587 320 810 910 560 650 600 800 2660 2760 2810 1160
S8-8 2517 2587 320 810 910 560 650 600 800 2660 2760 2810 1160
S9-8 2807 2587 320 810 910 560 650 600 800 2660 2760 2810 1160
S10-8 3112 2587 320 810 910 560 650 600 800 2660 2760 2810 1160
S11-8 3400 2587 320 810 910 560 650 600 800 2660 2760 2810 1160
S8-9 2517 2877 320 810 910 560 650 600 800 2660 2760 2810 1160
S9-9 2807 2877 320 810 910 560 650 600 800 2660 2760 2810 1160
S10-9 3112 2877 320 810 910 560 650 600 800 2660 2760 2810 1160
S11-9 3400 2877 320 810 910 560 650 600 800 2660 2760 2810 1160
S12-9 3705 2877 320 810 910 560 650 600 800 2660 2760 2810 1160
AIRHANDLING UNIT SIZE
LENGTHS OF FUNCTIONAL SECTIONS
FILTER SECTION HEATING ELECTRIC COOLING FAN SECTION DIFFUSER SECTION HEATER SECTION
FUNCTIONALSECTIONS
mm mm mm mm mm mm mm mm mm mm mm mm mm
FH FT FTH EW EE KW KW VR VR VF D
B H
S2-2(2) 690 758 220 490 740 350 400 1040 1240 1440 1140 x 1490 890 400 700 500 670
S3 875 758 220 490 740 350 400 1040 1240 1440 1140 x 1490 890 400 700 500 670
S3-2 980 758 220 490 740 350 400 1040 1240 1440 1140 x 1490 890 400 700 500 670
S4 1080 758 220 490 740 350 400 1040 1240 1440 1140 1040 1490 890 400 700 500 670
S4-2(5) 1280 758 220 490 740 350 400 1040 1240 1440 1140 1040 1490 890 400 700 500 670
S5-2 1575 758 220 490 740 350 400 1040 1240 1440 1140 1040 1490 890 400 700 500 670
S7 1280 948 220 490 960 450 400 1040 1240 1440 1140 1040 1640 940 400 700 500 670
S2-3 690 1049 220 490 960 450 400 1040 1240 1440 1140 x 1640 940 400 700 500 670
S3-3 980 1049 220 590 960 550 400 1040 1240 1440 1140 1040 1890 940 400 700 500 670
S4-3 1280 1049 220 590 960 550 400 1040 1240 1440 1140 1040 1890 940 400 700 500 670
S5-3 1575 1049 220 690 1160 550 400 1040 1240 1440 1140 1040 1890 940 400 700 500 670
S6-3 1880 1049 220 690 1160 550 400 1040 1240 1440 1140 1040 1890 940 400 700 500 670
S9 1280 1153 220 690 1160 550 400 1040 1240 1440 1140 1040 1890 940 400 700 500 670
S3-4 980 1354 220 790 1160 550 400 1040 1240 1440 1140 1040 1890 940 400 700 500 670
S4-4 1280 1354 220 790 1160 550 400 1040 1240 1440 1140 1040 1890 940 400 700 500 670
S12 1365 1354 220 790 1160 550 400 1040 1240 1440 1140 1040 2490 1150 400 700 500 670
S5-4 1575 1354 220 790 1160 860 400 1040 1240 1440 1140 1040 2490 1150 400 700 500 670
S15 1670 1354 220 790 1160 860 400 1040 1240 1440 1140 1040 2490 1150 400 700 500 670
S6-4 1880 1354 220 810 1160 860 400 1040 1240 1440 1140 1040 2490 1150 400 700 500 670
S7-4 2170 1354 220 810 1160 860 400 1040 1240 1440 1140 1040 2490 1150 400 700 500 670
S20 1880 1573 325 910 1360 860 400 800 1000 1150 1150 1050 2500 1200 450 750 550 800
S4-5 1280 1675 325 910 1360 860 400 800 1000 1150 1150 1050 2500 1200 450 750 550 800
S5-5 1575 1675 325 1010 1360 860 400 800 1000 1150 1150 1050 2500 1200 450 750 550 800
S6-5 1880 1675 325 1010 1360 860 400 800 1000 1150 1150 1050 2500 1200 450 750 550 800
S7-5 2170 1675 325 1010 1360 860 400 800 1000 1150 1150 1050 2500 1200 450 750 550 800
S8-5 2475 1675 325 1110 1360 860 400 800 1000 1150 1150 1050 2500 1200 450 750 550 800
S25 1880 1778 325 1110 1360 1060 400 800 1000 1150 1150 1050 2500 1200 450 750 550 800
S5-6 1575 1978 325 1210 1360 1060 400 800 1000 1150 1150 1050 2500 1200 450 750 550 800
S6-6(30) 1880 1978 325 1210 1360 1060 400 800 1000 1150 1150 1050 2660 1200 450 750 550 800
S7-6(35) 2170 1978 325 1210 1360 1060 400 800 1000 1150 1150 1050 2660 1200 450 750 550 800
S8-6(40) 2475 1978 325 1210 1360 1060 400 800 1000 1150 1150 1050 2660 1200 450 750 550 800
S9-6(45) 2765 1978 325 1210 1360 1060 400 800 1000 1150 1150 1050 2660 1200 450 750 550 800
S10-6(50) 3070 1978 325 1210 1360 1060 400 800 1000 1150 1150 1050 2660 1200 450 750 550 800
S6-7 1880 2273 430 1430 2030 1290 400 860 1000 1160 1160 1060 2660 1400 500 800 600 800
S7-7 2170 2273 430 1430 2030 1290 400 860 1000 1160 1160 1060 2660 1400 500 800 600 800
S8-7 2475 2273 430 1430 2030 1290 400 860 1000 1160 1160 1060 2660 1400 500 800 600 800
S9-7 2765 2273 430 1430 2030 1290 400 860 1000 1160 1160 1060 2660 1400 500 800 600 800
S10-7 3070 2273 430 1430 2630 1290 400 860 1000 1160 1160 1060 2660 1400 500 800 600 800
S7-8 2212 2587 630 1530 2630 1290 400 860 1000 1160 1160 1060 2660 1400 500 800 600 800
S8-8 2517 2587 630 1530 2630 1290 400 860 1000 1160 1160 1060 2660 1400 500 800 600 800
S9-8 2807 2587 630 1530 2630 1290 400 860 1000 1160 1160 1060 2660 1400 500 800 600 800
S10-8 3112 2587 630 1530 2630 1290 400 860 1000 1160 1160 1060 2660 1400 500 800 600 800
S11-8 3400 2587 630 1530 2630 1290 400 860 1000 1160 1160 1060 2660 1400 500 800 600 800
S8-9 2517 2877 630 1530 2630 1290 400 860 1000 1160 1160 1060 2660 1400 500 800 600 800
S9-9 2807 2877 630 1530 2630 1290 400 860 1000 1160 1160 1060 2660 1400 500 800 600 800
S10-9 3112 2877 630 1530 2630 1290 400 860 1000 1160 1160 1060 2660 1400 500 800 600 800
S11-9 3400 2877 630 1530 2630 1290 400 860 1000 1160 1160 1060 2660 1400 500 800 600 800
S12-9 3705 2877 630 1530 2630 1290 400 860 1000 1160 1160 1060 2660 1400 500 800 600 800
AIR
HANDLING UNIT SIZE
FUNCTIONAL SECTIONS
SUCTIONDISCHARGEMIXING BOX
DOUBLEMIXING BOX
EMPTYUNIT
SOUNDATTENUATOR
STEAMHUMIDIF.
HONEYCOMBHUMID.
PLATERECUPER.
ROTARYRECUPER.
FINNEDRECUPERATOR
FINNEDRECUPERATOR
LENGTHS OF FUNCTIONAL SECTIONS
mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm
A M M2 M2K L S DB WB PTD RT ERH ERC ERH ERC
B H 18dB 22dB 26dB
Compact air handling units are factory packaged devices, which in addition to basic functional componentshave an integrated cooling system. These devices are equipped with all the necessary elements for self-control and monitoring of operation. All the elements are factory connected and tested, which simplifies field work andsignificantly reduces the installation time. These are highly energy-efficient systems. They are available in alltypes and designs, the same as standard modular air handling units. They can have integrated gas heaters.We divide them into two basic types:
Compact air handling units with direct expansion (dx-cooler) with complete packaged cooling loop (compressor, evaporator and condenser). In one variant, besides dx-cooling, for the air preparation process condensation heat (heat pump) is also used and this group includes pool air handling units. In the other variant, the heat from condensation is dissipated outside. In this type, the alternative with turning the freon loop (heat pump) is also used. With regard to freon, R407C, R410A, R134A and R404A are used.Compact air handling units with integrated chiller forcold water preparation for the cooler in the air handling unit.
All these systems, with the use of heat recovery and with an intelligent controller, ensure very high efficiency.
Pool air handling unit (run-around coil)
Compressors in air handling unit
Condensation heat is discharged to the outside
Air handling unit withintegrated chiller
Delivery side
Exhaust side
Waste air
COMPACT AIR HANDLING UNITS with integrated cooling system
Fresh air
Functional sections that form the air handling unit in the order in airflow direction
Fan section belt drive
Fan section direct drive
Fan section direct drive free
rotating fan
Flexible connection
Suction/discharge section with one
damper
Mixing box with two/three dampers
Mixing box with three dampers
Air calming section
Sound attenuator
Empty section
Water / glycol heating coil
Steam heating coil
Electric heater
Condenser
Gas heater with direct burner
Gas heater with indirect burner
Water / glycol cooler cooling coil
Evaporator
Section with compressor
Section with droplet eliminator
Steam humidifier
Adiabatic humidifier
Honeycomb humidifier
Cassette type / panel filters
Bag filter
Bag filter with pre-filter
Absolute filter
Active carbon filter
Finned recuperator -heater
Finned recuperator - cooler
Plate recuperator - diagonal
Rotary recuperator / regenerator
Assembly designation that most closely defines the required air handling unit. page 25, 26 and 27
Series S
Standard
Hygienic
Swim. pool
Indoor mounting
Outdoor mounting
horizontal
double-height
vertical
parallel
Size
Design
Type
Intallation type
Service side L - left
D - right
Panel variants Pl - polyurethane
Mv - mineral wool
MARKING OF MODULAR AIR HANDLING UNITS
EXAMPLE OF MARKING
CONFIGURATIONS
HORIZONTAL DESIGN
DOUBLE-HEIGHT AND PARALLEL DESIGN
CONFIGURATIONS
DOUBLE-HEIGHTAND PARALLEL DESIGN WITH PLATE RECUPERATOR
CONFIGURATIONS
DOUBLE-HEIGHTAND PARALLEL DESIGN WITH ROTARY RECUPERATOR
DOUBLE-HEIGHT AND PARALLEL DESIGN WITH RUN-AROUND COIL
Content of humidity (g/kg)
Tem
pera
ture
AUTOMATIC CONTROL OF THE OPERATION of air handling units
FEC series of Johnson Controls controllers
APPLICATION DIAGRAM (example) for one system as a basis for the design of automation and selection of controllers.
Processes in h-x diagram
P1 mixing winterP2 mixing summerP3 heatingP4 coolingP5 humidification by steamP6 heatingP7 adiabatic humidification
PCO series of Carel controllers
The essence of a quality air-conditioning system is that with appropriate air flow and quality (the required purity, temperature, humidity...), desired parameters of comfort are achieved in the air-conditioned space.This is achieved by combining basic processes of air treatment and well-designed automation system.
Air conditioning is now more demanding so that control of the operation of air handling units becomesincreasingly complex.We offer air handling units with full automation for system management and control according to the appropriate application diagram, with possibility of connecting to the central monitoring and control system. The management and control system consists of a digital, freely programmable controller, local automation and electric cabinet which houses the controller and other electrical equipment.
CONTROLLERS with their application program provide reliable system operation, minimal energy consumption, compliance with design parameters in the system and can be connected to the central monitoring and control system. We have chosen:
FAC/FEC Series - Johnson Controls controllers PCO series - Carel controllers
On request, we use controllers from other manufacturers (Siemens, Sauter..).
AUTOMATIC CONTROL OF THE OPERATION of air handling units
Basic functions of application programs
FUNCTIONS OF REGULATION• Setting the parameters • Control of air handling units according to the outside temperature• Cascade control of the temperature and humidity, from minimum to maximum, in the space, on supply and exhaust. • Control of temperature and moisture of the supply air. • Control of temperature and humidity by processes, in cascade manner (mixing, heat recovery, heating, cooling, humidification)• Automatic switching of operation mode. • Special day operation modes
CONTROL AND MONITORING FUNCTIONS• Monitoring of fans (frequency converters) • Pump control • Operation in the modes (comfort, economy) • Free cooling • ON/OFF or modulated control and of adiabatic and isothermal humidifiers • Air quality control with CO2 and VOC sensors
PROTECTION FUNCTIONS• Soiling of filters• Frost protection• Fire protection, monitoring and alarming • Interruption of airflow • Alarms (from humidifiers, from frequency converters) • Testing of inputs/outputs CONNECTION to BMS
Differential pressure switch Frost thermostat
Damper actuator
Control quantities are measured by duct and (or) space temperature (T) and humidity (Rh) sensors.
A part of other control equipment:
An example of the display
Electrical cabinet with a controller
Room sensor T and Rh Duct sensor T Duct sensor Rh
Flow switch Three-way valve with drive Valve actuator
AUTOMATION ELEMENTS MOUNTED ON AIR HANDLING UNITS Differential pressure switches (for filters and fans), frost thermostats, damper actuators, operating and protective thermostats of el. heaters, mainly supplied as mounted on air handling units.
AUTOMATIC CONTROL OF THE OPERATION of air handling units
Monitoring system
CENTRAL CONTROL AND MONITORING SYSTEM (CCMS - BMS) is a computer integrated system whose basic functions are control, management, monitoring and optimization of all systems in one building.Controllers that control air handling units (which are an integral part of the air conditioning system), can beeasily integrated into BMS system using open standard protocols (BACnet, LonWorks and ModBus).
Fan-filter section in side by side air handling units Service-safety switches for fan section
Rotary heat recovery section, wheel diameter2.500 mm..
Cooling section Q= 455KW.
Filter section 98.000 m3/h Fan section 4x24.500 m3/h
Fan section with the single dampers for each fan Fan section with two fans, air flow 2x30.000 m3 / h
Sections of horizontal air handling units Swimming pool air handling units for smaller indoor pools 1900 m3/h
Packaging and transport AHU
Content of humidityTe
mpe
ratu
re
SOKO INŽINJERINGDirectorateBulevar Arsenija Čarnojevića 12511070 Novi BeogradSrbija+381 11 635 19 [email protected]
FactoryPartizanski put bb (Industrijska zona), 22314 KrnjesevciSrbija+ 381 22 215 07 [email protected]
ServicePartizanski put bb (Industrijska zona), 22314 KrnjesevciSrbija+ 381 22 215 07 [email protected]
