VTS – Air handling unit – VENTUS VVS

Specification

• Casing:  The steel skin of Ventus VVS casing coated with aluzinic AZ150. The skin panels made of rigid polyurethane foam. With special design, unique in the market, C Panel which makes high rigidity, zero leakage, less cold bridge. Working temperature: (-40)°C ÷ (+90)°C. Panel thickness: 40mm. Thermal conductivity PPU λ= 0,022 W/mK. Casing fire resistance: non-flamable, non fire spreading (NRO). Moisture absorption: 0,04%. PPU density: ρ= 42kg/m³. Mechanical strength of casing: -1000 Pa ÷ 1000 Pa < 2mm (D1), casing tightness: (MB): (-400) Pa - 0,05 l/sm², (+700) Pa - 0,13 l/sm² (L1); (RU): (+400) Pa - 0,93 l/sm², casing heat transfer coefficient: K= 0,6 W/m²K (T2) thermal bridges coefficient: Kb =0,52 (TB3).

• Canopy: The canopy is made of 0.5mm steel sheet, double side coated with 185um of zinc (DX51D AZ185). Canopy is assembled of modules equipped with self-latching grooves securing perfect tightness of the joints. Modular structure of the canopy ensures its easy and safe assembly.
• Fan: Low and medium pressure ventilation systems with fan static pressure not exceeding 2000 Pa. Maximum fan set working temperature: 60°C. Impeller made of SAN (styrene/acrylonitryle) construction material with 20% glass fiber. Equipped with AC or EC motor.
  • AC motor: Fan and motor mounted on common housing, separated from AHU casing by set of rubber vibration absorbing mounts. Motors of TEFC type. Motors fitted for IEC standard. Available Energy classes: IE2, IE3. Motor winding insulation class: F (fitted for VFD operations). Bearings lifetime: L10= 20000h / L50 = 100000h. Protection degree: IP55. Maximum working ambient temperature: 60°C.
  • EC motor: Ventus VVS 's EC motors are Permanent Magnet motor, higher efficiency vs traditional inductive AC motors. Available Energy classes: IE4. Motor widing insulation class: F. Protection degree: IP54. Maximum working ambient temperature: 55°C. Lifespan: 70000 hours at load not exceeding 70% of nominal capacity at ambient temperature not exceeding 35°C, 30000 hours at 100% capacity load at ambient temperature not exceeding 55°C.
• Filters:
  • Panel filter: Pleated filtration fabric shielded by steel net, installed in 50 mm thick frame. Filtration fabric made of polyester fibres. Applied as initial air filtration stage. Working temperature: max (+70)°C, 100% RH. Type: G4.
  • Bag filter: Filtration fabric made of polyester fibres. Bags fixed to to 25 mm thick frame. Filters of class M5 - bags length: 300 mm, filters of class F7 ~ F9 - bags length: 600 mm. Applied as initial, secondary of final air filtration stage. Working temperature: max (+70)°C, 100% RH.
• Rotary heat wheel: Up to 86% of energy recovery, depending on airflow rate and its velocity in the heat wheel window.
• Counterflow hexagonal recuperator: Energy recovery at very high supply and exhaust air stream separation (reaching 99,9%). Heat recovery reaching up to 93% depending on flow rate face velocity of the air passing the recuperator.
• Crossflow plate heat recuperator: Energy recovery at very high supply and exhaust air stream separation (reaching 99,9%). Heat recovery reaching up to 80% depending on flow rate face velocity of the air passing the recuperator.
• Run-around coil: Indirect Energy recovery (sensible heat) at 100% supply and exhaust airstreams separation. Max heat-transfer fluid operation pressure: 1,6MPa=16bar (tested 21 bar). Max glycol concentration: 50%.
• Mixing section: Ventus VVS 's Section equipped with two air inlets/outlets aided with dampers, enabling regulation of fresh and recirculation air share (recirculation). Direct Energy recovery (sensible and latent heat) resulting from partial mixing of fresh air with return one. Control of fresh air share in entire airflow supplied to handled spaces. Working temperature range: -40 ÷ +70°C.
• Water heater: Max glycol concentration: 50%. Max medium temperature: 150°C. Max medium working pressure: 1,6MPa = 16bar (test: 21bar). Heating capacity: parameter resulting from individual performance calculaation of selected unit (CCOL). Medium side pressure drop – parameter resulting from individual performance calculation of selected unit (CCOL).
• Electric heater: Max permissible ambient temperature around heating elements: 65°C.
• Direct expansion coil as condenser in heat pump circuit: Max medium temperature: 60°C. Max medium working pressure: 3,84MPa = 38,4bar (test: 50bar). Heating capacity: parameter resulting from individual performance calculaation of selected unit (CCOL).
• Water cooler: Max glyccol concentration: 50%. Min supplying medium temperature: +2°C. max medium working pressure: 1,6MPa = 16bar (test: 21bar). Cooling capacity: parameter resulting from individual parameters of selected unit (CCOL). Medium pressure drop / flow rate: parameter resulting from individual performance calculation of selected unit (CCOL). For reversed operationg mode (heating) max medium working temperature: 140°C.
• DX cooling coil: Min. Refrigerant evaporation temperature: +3°C. Max refrigerant working pressure: 2,2MPa=22bar (test: 29 bar). Cooling capacity - parameter resulting from individual performance calculation of selected unit (CCOL).
• Evaporative humidifier: Max air face velocity across the humidifier pad: 3,00 m/s (VS 21-VS 55); 4,00 m/s (VS 75-VS 650). Water pressure range: 0,15 ÷ 0,75 MPa. Requirements regarding water quality – standard tap water.
• Sound attenuating section: Max air face velocity: v=5m/s. 
• Internal light: Working conditions: -40 ÷ +70°C.
• Air damper: Air leakage at closted damper: 50 m3/h*m2 - at 100 Pascals of pressure difference. Workint temperature range: -40 ÷ +70°C.
• Flexible connection: Max air face velocity: 5m/s. Working conditions: -40 ÷ +70°C.
• Air intake and discharg louvers: Max air face velocity: 5m/s. Working conditions: -40 ÷ +70°C.