for a considerable reduction of the supply air temperature which, in turn, reduces the air conditioning

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1 AIR HANDLING UNITS WITH HEAT RECOVERY Series VENTS enthalpy membrane in the warm season. This allows for a considerable reduction of the supply air temperature and humidity which, in turn, reduces the air conditioning load. Air handling units in heatand sound-insulated casing. Air flow up to 300 m 3 /h. Heat recovery efficiency up to 98 % Description The air handling units are the fully featured ventilation units with heat recovery for air filtration, fresh air supply and stale air extract. During operation the extract air heat is transferred to the supply air stream by the highly efficient plate heat exchanger. The units are designed for energy efficient ventilation of cottages and flats and are compatible with round air ducts (Ø 125 mm). Casing The casing is made of expanded polypropylene (EPP) with high heat and sound insulation characteristics (panel thickness mm). Filter Supply and exhaust air flows are purified through panel filters with filtering class G4. A replaceable filter with filtering class F8 is optionally available. Motor The units are equipped with high-efficient EC motors with an external rotor and a centrifugal impeller with backward curved blades. These state-of-the-art motors offer the very best in energy efficiency today. EC motors are characterised with high performance and optimum control across the entire speed range. In addition to that the efficiency of the electronically commutated motor reaches very impressive levels of up to 90 %. Heat exchanger The VUT 270 V5B EC units are equipped with a counter-flow polystyrene heat exchanger. In the cold season the extract air heat is captured and transferred to the supply air stream which reduces the ventilation-generated heat losses. This can lead to formation of condensate that is collected in a special drain pan and discharged into the sewage system. In the warm season the ambient air heat is transferred to the exhaust air stream. This allows for a considerable reduction of the supply air temperature which, in turn, reduces the air conditioning load. The VUE 270 V5B EC units are equipped with a counter-flow heat exchanger with an enthalpy membrane at the core. In the cold season the extract air heat and moisture are transferred to the supply air stream through the enthalpy membrane reducing the heat losses from ventilation. Consequently, it is the ambient air heat and moisture transferred to the exhaust air stream through the Bypass The units are equipped with a bypass for summer ventilation (cooling of the premise with a cool outside air). Control and automation The units are equipped with an A14 automation. The A14 models have the A14 sensor control panel with LED indication. Freeze protection Supply fan stopping. The heat exchanger freeze protection operates as follows: in case of freezing danger determined by the temperature sensor the supply fan is turned off to let extract air warm up the heat exchanger. After freezing danger is no longer imminent, the unit reverts to the standard operation mode. Installation The units are designed for suspended or floor mounting. The access for unit and filter maintenance is available from the front panel. The service panel can be installed on the left or on the right side depending on installation type. Designation key Series Rated air flow [m 3 /h] Installation type Casing design Bypass Motor type Control VUT: ventilation with heat recovery VUE: ventilation with energy recovery 270 V: vertical 5: expanded polypropylene (EPP) B: bypass EC: synchronous electronically commutated motor A14: sensor control panel with LED indication

2 A14 Functions Control functions Switching the unit on and off + Low, Medium or High speed selection + Filter maintenance indication + Emergency indicator + Bypass control Speed setting from 0 to % + Built-in humidity sensor Normally open contacts for a kitchen hood, a humidity sensor and a CO 2 sensor Normally closed contacts for a fire alarm panel + Air damper contacts + manual option + D Overall dimensions Dimensions [mm] Model Ø D B H L A H Unit design Exhaust air Intake air Extract air Supply air Spigots Cable slots EC supply fan EC extract fan Bypass Control unit G4 extract filter G4 supply filter Heat exchanger F8 extract filter (option) Drain pan

3 AIR HANDLING UNITS WITH HEAT RECOVERY Accessories for air handling units Model G4 supply panel filter F8 supply panel filter Indoor humidity sensor CO 2 sensor with indication CO 2 sensor Humidity sensor U-trap kit Air damper Electric actuator VUT 270 V5B EC A14 VUE 270 V5B EC A14 SF 182x254x18 G4 SF 182x254x18 F8 HV2 CO2-1 CO2-2 HR-S SH-32 KRV 125 LF230 Technical data VUT 270 V5B EC A14 VUE 270 V5B EC A14 Unit voltage [V/50 (60) Hz] 1~ 230 Maximum power [W] 162 Maximum current [A] 1,2 Maximum air flow [m 3 /h] 300 RPM [min -1 ] 3200 Sound pressure level at 3 m distance [dba] 34 Transported air temperature [ С] Casing material expanded polypropylene (EPP) Insulation EPP mm Extract filter G4 Supply filter G4 (optional F8) Connected air duct diameter [mm] Ø125 Weight [kg] 13 13,5 Heat recovery efficiency [%] from 87 up to 98 from 72 up to 94 Heat exchanger type counter-flow Heat exchanger material polystyrene enthalpy membrane Energy efficiency class for A14 A+ A+

4 Static pressure ΔP [Pa] VENTS SFP 0.6 W/l/s SFP 0.8 W/l/s SFP 1.0 W/l/s SFP 1.2 W/l/s SFP 1.4 W/l/s SFP 1.6 W/l/s SFP 1.8 W/l/s SFP 2.0 W/l/s Point Power [W] Sound pressure level at 3 m distance [dba] (44) (44) (43) (40) (39) (38) (37) (33) (33) Heat recovery efficiency [%] Heat recovery efficiency [%] 0 VUT 270 V5B EC VUE 270 V5B EC A-weighted sound power level 70 Gen. Octave frequency band, Hz LpA, 3 m dba dba L wa to supply inlet dba LwA to supply outlet dba LwA to exhaust inlet dba LwA to exhaust outlet dba L wa environment dba LpA, 1 m dba Calculation of air temperature at heat exchanger outlet: t = t outd + k hr * (t extr - t outd ) /, where t outd outdoor air temperature [ C] t extr extract air temperature [ C] k hr heat exchanger efficiency (according to the diagram) [%]

5 AIR HANDLING UNITS WITH HEAT RECOVERY Application options Ventilation hood Floor plenum with a grille Ceiling plenum with an anemostat FlexiVent air duct Isovent 150 insulated air duct Air handling unit Collector