Casing Construction

The casing construction is in accordance with Eurovent per EN 1886 complying the following requirements.

• Casing leakage test L1 (-400 pa)
• Casing leakage test L1 (+700 pa)
• Casing strength D1 (2500 Pa)
• Thermal Bridging TB2
• Thermal Transmittance T2
• Filter Bypass leakage F9 ( -400 pa)
• Filter Bypass leakage F9 ( +700 pa)

Aluminium Frame

Structure is made from hollow extruded heavy aluminum profiles with internal radius coving profile which restricts water stagnation in the corner to avoid mold and fungus formation, anodized for extra anti corrosion protection. Frame provides excellent rigidity and stability to the structure along with the good aesthetics. These profiles are specially designed for HVAC applications, Profiles are connected by means of special die cast Glass filled nylon corner piece to form the air handling unit sections.
Frame sizes for panels of various thickness such us 25mm and 50mm are also available. 50mm thermal break profile has an excellent thermal bridging and least thermal transmittance properties which are in accordance to EN1886.
Following are the features of this construction:

• Aluminium frame construction with internal coving structure
• Good mechanical strength
• Perfect appearance and precise dimensions
• Quick and precise installation of the interior components
• Can be easily dismantled and assembled at minimum time and cost
• Flexibility of Construction

Panel

Panels are sandwich double skin type with outer sheet as Pre painted galvanized steel and inner as galvanized sheet.
Polyurethane form insulation is injected between the two sheets to make sandwich panels. A minimum density of 40kg/m3 is
maintained however higher density up to 48kg/m3 can also be achieved. Stainless steel 304, Stainless steel 316 or Aluminium sheets can be provided for double skin panels as an option. The Polyurethane injected panels have an excellent heat insulation and noise reduction properties and add extra mechanical strength and rigidity to the structure. The factory injected PUF is CFC & HFC free and self extinguishing type. The maximum heat transfer coefficient for 25 mm, 50 mm and 50 mm thermal break is U = 0.73 w/m3K an 0.35w/m3K respectively. Panel are fixed to profile with high quality gasket which has excellent sealing properties and good resistance to compression stress and temperature.

Base Frame

Base Frame is constructed out of the sendzimir Galvanized sheet steel with factory applied epoxy paint & heavy duty lifting holes.
Mild steel channel frames are also provided for larger capacity units. 100 mm high Base frame is provided for the floor mounted units.
Hanging supports are provided for the ceiling suspended units to hang the units.

Fans

The unit consist of AMCA certified fans- DIDW, SISW belt driven and Plenum/ Plug type backward curved fans with motors directly coupled to the fan. The Fans are AMCA certified for the Sound & Air Performance and Fan grade efficiency. All impellers are statically and dynamically balanced to ISO1940 and AMCA 204 – G2.5 standards. Plenum fans with high energy efficiency EC motors are also available with low noise, low power consumption and longer durability. Clients looking for high energy efficient units can opt for AHU’s with EC fans, which can save up to 30 to 50% of power consumption as compared to conventional fans.

Motors

Standard Foot mounted, TEFC, 3 phase induction motors are provided with standard efficiency EFF-2, High energy efficiency EFF-1 & premium efficiency motor can also be supplied. All the motors are standard foot mounted TEFC, IP 54, Class F Insulation with temperature rise to class B. Motors for special application can be provided like Flame proof or explosion proof. Permanent magnet motors can also be provided.

Fan and Motor Assembly

Fan and motor are mounted on heavy gauge galvanized steel base frame with high efficiency vibration isolators (Spring Isolators or Rubber mounts) ensures no vibration is transmitted to the unit casing. The Isolators are designed for 92 % efficiency. The Isolators are selected on the basis of weight of the fan and motor assembly and the higher value of RPM of the Fan or Motor.

Pulley and V Belts

Cast iron pulley with balancing equals to G2.5 is used with minimum of 2 grooves, SPA and SPB type of pulleys are used based on the motor capacity. V belts used are of high grade, anti static and oil resistance type.

Droplet Eliminators

Droplet eliminators are provided where the coil face velocity exceeds 2.54 m/s as an option. The droplet eliminator can be provided in Aluminum or PVC or Stainless steel construction.

Cooling & Heating Coils

Standard Chilled water coils are made in either 3/8”, 1/2” & 5/8”dia. seamless copper tubes which are mechanically expanded with
rippled aluminum fins. Th is ensures high heat transfer efficiency, low air resistance and longer coil life. The cooling coil are designed as per AHRI-410 standard. Hydrophilic Aluminum or Copper fins are also available. An additional option of anti-corrosive coatings such as Heresite™ or blygold™ are also available. All Coils are provided with Copper /Mild steel headers. Coils are provided with Brass threaded male adaptors / connectors. Refrigerant coils are provided with brass distributors. Air & Drain vents made of brass are standard for water coils. The standard casing material for all coils is Galvanized Steel. Casing can also be manufactured with Stainless Steel.

Drain Pan

Drain pan is made from corrosion resistant Stainless Steel 304 grade as a standard feature. Multi slope drain pans are designed as per ASHRAE 62 which ensures that all the condensate is drained and there is no microbial growth inside the unit hence maintains the Indoor Air Quality. The Drain pan is insulated externally with 10 mm closed cell Elastomeric foam to avoid surface condensate from outside. Stainless Steel 316 grade drain pan can be provide as an option.

Filters- Pre Filters

Filter sections are suitable for insertion of various types of filters. Filter sections are equipped with easily removable panels to permit and fasten the filters aft er the inspection and replacement. A complete line of filters are available to meet all kinds of filtration efficiency and requirements. Single or multi station filtration to suit different application conforming to the latest ASHRAE & EUROVENT standards are provided. The filters are arranged in the grid in heavy–duty specially designed galvanized sheet steel frame to avoid air bypass and are removable and washable type.

Filters-Metallic Filters

• Grease or Metallic filter are suitable for kitchen extract
• Metal Series for heavy duty & coarse filtration
• Washable filter
• G2 Grade
• High Dust holding capacity filters METALLIC FILTER
• Bag, pocket type
• Non woven synthetic or Glass fiber media
• Flange type construction
• UL classified media
• Low pressure drop and longer life
• Available in depth option of 300mm , 500mm & 600mm

Filters-Soft Bag Filter

• Bag, pocket type
• Non woven synthetic or Glass fiber media
• Flange type construction
• UL classified media
• Low pressure drop and longer life
• Available in depth option of 300mm , 500mm & 600mm
• Used for filtration of particles from 5 microns up to 1 micron

Filters-Rigid V Cell Filter

• Mini pleat rigid bag filter
• Microfine glass fiber media
• Flange type construction
• Low initial pressure drop
• UL certified media
• Large surface area
• Available in wide range of effi ciencies from F6 to F9 grade
• Used for filtration of particles from 5 microns up to 1 micron

Filters-Hepa Filters

• High Efficiency Particulate Air Filters are made of Glass fibers
• Used for Filtration of Particles of size up to 0.3 microns
• Efficiency of filters is 99.97%
• HEPA Filter are generally 300 mm in depth
• Used in Operation theaters, Clean room Applications

Filters-Carbon Filters

• Odour filtration is done by using activated carbon to remove volatile organic compounds in the air
• Filters are made of activated carbon impregnated granules filled in deep bed panels arranged in a V shape and encased in metallic box
• Used for odour control
• Also use to treat some of the harmful gases in the air

Filters-UV Emitter

Ultra violet lamps are factory fitted as an option in the Air handling units to prevent the microbial growth and other air borne contamination. The UV lamps can be placed upstream or downstream of the cooling coil. The UV lamps are also used in the ecology unit to minimize emission of the harmful gases in the air.

Heat Recovery Wheel (HW)

The thermal wheel is used to recover the energy from the exhaust air and subsequently bring down the overall cooling load.
The thermal wheels are air to air rotary heat exchanger and can recover energy up to 80% without spoiling the IAQ. The heat wheel can recover both the sensible as well as latent heat thus reducing the load on the main cooling coil by around 30 % Two basic types of Wheels are available. Sensible heat recovery wheel – for sensible heat recovery only Enthalpy heat recovery wheel – for Sensible and latent recovery The thermal wheel is a revolving cylinder divided into a number of parallel flutes.

Heat Pipe (HP)

The horse shoe coil is self sustaining coil, which operates on the ambient temperature without any external source of energy.
The Horse shoe coil are used as dehumidifier which helps to maintain the humidity and maintains the indoor air condition.

Sound Attenuators (SAT)

Sound Attenuators can be provided as integral part of AHU, they can be placed both in supply and return air stream for noise
reduction generated by fans. Square and rectangular bull nose construction SAT are designed to handle maximum air capacities and sound vibrations at minimum pressure drop. Noise radiated is minimized by double skin construction and bull nose design of splitter at the air inlet providing good aerodynamics. Attenuator provided are manufactured from high quality Galvanized sheet of thickness conforming to JIS 3302 or BS 2989 (Stainless steel and Aluminum can also be provided as an option)
Acoustic material is of inorganic non hygroscopic mineral fiber incombustible with class 1 Fire rating conforming to BS 476. Sound attenuators are conforming to international standard.

Electric Heater (EH)

Electric heaters are used for sensible or reheating purpose to control the temperature and humidity respectively. Stainless steel finned tubular heating elements which are safe and durable are used.Stainless steel fins are brazed to stainless steel tubular sheath which includes 80/20 nickel chrome resistance wire connected to terminal pins. The electric heaters with different capacities can be provided with different watt density as per the requirement. The heater can be provided in 3 phase or single phase as per the
specifications. Heater can be provided with magnetic contactors, thyristor controller and disconnect switch (optional feature).

Configuration

• Single Tier
• Double Tier
• Horizontal Floor Mounted unit
• Ceiling Suspended units
• Horizontal Floor Mounted units
• Vertical Floor mounted units

Products:
Fresh Air handling units
Air handling units
Heat recovery Air handling units
Heat recovery ventilators
Heat recovery and heat pipe units
Ecology Units
Ventilation units
DX type Air handling Units

Fresh Air Handling Units- SK50T (T- Thermal break)

SK50T – Series are Horizontal Floor mounted Fresh Air handling units capable of handling the air volume from 1700 CMH to 60000 CMH and handling external static pressure of up to 1000 pa. The casing consist of 50 mm thick profile with Thermal bridge which ensures that no condensation takes place on the surface of AHU The panels are of 50 mm thick insulated with CFC free PUF with uniform density of 40 kg/m3 The unit consists of following components

• Intake section with G.I powder coated sand trap louvers (optional)
• Combination filter section with pre and bag filters
• Cooling coil ( CHW or DX type)
• Forward or Backward curved blower
• 3 phase foot mounted induction motor.

Fresh Air Handling Units – SK50T-PO (P-Heat pipe)

SK50T-PO – Series are Horizontal Floor mounted Fresh Air handling units capable of handling the air volume from 1700 CMH to 60000 CMH and handling external static pressure of up to 1000 pa. The casing consist of 50 mm thick profile with Thermal bridge which ensures that no condensation takes place on the surface of AHU. The panels are of 50 mm thick insulated with CFC free PUF with uniform density of 40 kg/m3. The unit consists of following components

• Intake section with G.I powder coated sand trap louvers (optional)
• Combination filter section with pre and bag filters
• Horse shoe heat pipe for energy recovery and cooling and de humidification
• Cooling coil ( CHW or DX type)
• Forward or Backward curved blower
• 3 phase foot mounted induction motor.

Fresh Air Handling Units – SK50T-WO (W- Heat wheel)

SK50T-WO-Series are Fresh Air handling units capable of handling the air volume from 1700 CMH to 60000 CMH and handling external static pressure of up to 1000 pa. The casing consist of 50 mm thick profile with Thermal bridge which ensures that no condensation takes place on the surface of AHU. The panels are of 50 mm thick insulated with CFC free PUF with uniform density of 40 kg/m3 The unit consists of following components:
Double tier units with supply section on lower side and return/exhaust on upper side Supply Section:

• Intake section with G.I powder coated sand trap louvers (optional)
• Combination filter section with pre and bag filters
• Rotary heat recovery wheel or PHE or HPHR for energy recovery
• Forward or Backward curved blower
• 3 phase foot mounted induction motor

Return Section:

• Intake section
• Pre filter
• Rotary heat recovery wheel for energy recovery
• Forward or Backward curved blower
• 3 phase foot mounted induction motor

Fresh Air Handling Units – SK50T-PW (with heat exchanger and heat pipe)

SK50T-PW- Series are Fresh Air handling units capable of handling the air volume from 1700 CMH to 60000 CMH and handling external static pressure of up to 1000 pa. The casing consist of 50 mm thick profile with Thermal bridge which ensures that no condensation takes place on the surface of AHU. The panels are of 50 mm thick insulated with CFC free PUF with uniform density of 40 kg/m3. The unit consists of following components. Double tier units with supply section on lower side and return/exhaust on upper side

Supply Section:

• Intake section with G.I powder coated sand trap louvers (optional)
• Combination filter section with pre and bag filters
• Rotary heat recovery wheel for energy recovery
• Horse shoe heat pipe for energy recovery and cooling and de humidification
• Cooling coil ( CHW or DX type)
• Forward or Backward curved blower
• 3 phase foot mounted induction motor

Return Section:

• Intake section
• Pre filter
• Rotary heat recovery wheel for energy recovery
• Forward or Backward curved blower
• 3 phase foot mounted induction motor

Air Handling Units – RSK-25-FM/CS ( Non Eurovent Series)

Standard Air handling are of two types – Floor mounted (FM) and Ceiling suspended (CS) which are also known as recirculating AHU.
Horizontal Floor Mounted units (FM). RSK-25-FM series consist of the 25 mm thick profile without thermal Indoor applications are insulated with double skin CFC free PUF with uniform Density of 40 Kg/m3
The unit consists of following components

• Pre filter section
• Cooling coil section
• Forward or backward curved blower
• 3 phase induction motor
• Mixing box can be provided, if required