Description
VUT EH EC air handling units with the electric heater are the complete ventilation units designed to provide both supply and exhaust ventilation, air filtration and cleaning as well as removal of contaminated exhaust air. The exhaust air energy is transferred to supply air through the plate heat exchanger. Applied in ventilation and conditioning systems for various premises requiring economic solution and controllable air exchange. EC motors reduce energy consumption by 1.5-3 times and ensure high efficiency and low noise level at the same time. All the models are compatible with Ø 150, 160 and 200 mm round ducts.
Modifications
VUT EH EC – a range of compact Energy saving Air Handling Units (AHU) equipped with intake and exhaust centrifugal fans with EC motors, counter-flow heat recovery elements, electric heater and air filters.
Casing
The casing is manufactured from aluminum-zinc compound with internal 25 mm mineral wool heat- and sound- insulating layer.
Filter
Two incorporated G4 panel filters for extract air ventilation and F7 filters for supply air ventilation are supplied with the unit.
Fans
The double inlet impellers with forward curved blades are powered by high efficient electronically commutated (EC) direct current motors with external rotor. As of today, such motor type is the most advanced solution for energy saving. EC-motors are featured with high efficiency and the best control over the whole fan speed range. Premium efficiency (reaching 90%) is an absolute advantage of the electronically commutated motors.
Heat recovery
The units are equipped with the high efficient heat exchangers reaching up to 95%. VUT EH EC models are fitted with the counter-flow heat exchangers made of polystyrene. The unit is equipped with the drain pan at the bottom of the heat exchanger for condensate drainage.
Heater
The electric heater at outlet from the heat exchanger is designed for warming up of supply air up to the set level if heat recovery is not enough to attain the set supply air temperature.
Control and automation
The unit incorporates an integrated automation and control system with a multi-functional control panel with LCD display. The standard delivery set includes 10 m connection cable for connection to the remote control panel. The unit has the freezing protection function to prevent the heat exchanger freezing by means of actuating the bypass damper and controlling water heater. As the temperature sensor warns of the freezing danger, the bypass air damper is opened and the intake air is directed through the air duct beside the heat exchanger. As the heat exchanger is warmed the supply air temperature rises up to the set level while passing through the heater. Meanwhile the warm extract air warms up the heat exchanger. After the freezing danger is no longer imminent, the bypass damper shuts the bypass duct and the unit reverts to the standard operation mode.
VUT EH EC control and protection functions
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control from the control panel: switching on/off, speed selection, timer, faults;
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maintaining the set room temperature by the sensor on the control panel – smooth heating capacity control;
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three-speed fan speed control (low-mediumhigh);
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unit operation according to daily and week schedule (timer adjustable from the control panel);
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safe start-up/shutdown of the fans;
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electric heater overheating protection by the temperature sensor installed in the supply air duct and by two overheating thermostats, one thermostat activated at 60 °C with automatic reset and another thermostat activated at 90 °C with manual reset. Blowing of the heating elements for heat removing at the end of the heating cycle;
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filter clogging control by engine hours.
Offered options to the units
 |
|
SF |
|
Type |
G4 replaceable filter (panel filter) |
F7 replaceable filter (panel filter) |
|---|
|
VUT 300-1 EH EC |
SF VUT 300-600 EH/WH G4 |
SF VUT 300-600 EH/WH F7 |
|
VUT 300-2 EH EC |
|
VUT 400 EH EC |
|
VUT 600 EH EC |
Mounting
Air handling unit is mounted on the floor, suspended to the ceiling by means of a seat angle with inserted vibration-damping element or attached to a wall with brackets. The unit can be mounted either in service spaces or in main premises above the suspended ceiling, in the pocket or the unit can be placed directly in the room. Mounting in any position shall provide the correct condensate drainage. Access for the unit maintenance and filter cleaning shall be reserved on the pane side.
VENTS VUT EH EC ventilation and air exchange example in the cottage
Accessories
For attenuation of sound generated by the fans it is recommended to install the duct silencer (refer SR) from inside before the unit. For vibration absorbing it is recommended to install the flexible anti-vibration connectors (refer VVG) on both sides of the unit.