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VUT/VUE 250 VB(E) EC L/R
The unit has the following operating logic: warm stale extract air from the room flows into the unit, where it is filtered by the extract filter,
then air flows through the heat exchanger and is exhausted outside by the extract fan. Cold fresh air from the outside flows into the unit,
where it is cleaned by the supply filter. Then the air flows through the heat exchanger and is directed to the room with the supply fan.
Heat energy of warm extract air is transferred to clean intake fresh air from the outside and warms it up. The air flows are fully separated
while flowing through the heat exchanger. Heat recovery minimizes heat losses, which reduces the cost of space heating in the cold
season.
UNIT DESIGN
VUT/VUE 250 VB(E) EC L
VUT/VUE 250 VB(E) EC R
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1 – SETUP MODE button (for the units with an A21 automation) 2 – control unit 3 – fan unit 4 – counter-flow heat exchanger 5 – supply
filter 6 – extract filter 7 – bypass damper 8 – electric heater (only for VUT/VUE 250 VBE EC L/R units) 9 – drain pipe 10 – humidity sensor
(optional)
The air handling unit is equipped with a front service panel for repair and maintenance operations. The control unit is accessible for installation
and wiring operations through the inspection door on top of the unit. The power cable and ground cable are connected to the control unit
via the electric lead-ins.
The bypass damper is open or closed depending on operation mode of the unit. During the operation of VUT 250 VB(E) EC L/R units the
difference between the supply and extract air flow temperature leads to condensate generation. Condensate is collected in the drain pan
and is removed outside through the drain pipe. The VUE 250 VB(E) EC L/R units are equipped with an enthalpy heat exchanger and do not
require condensate drainage.
Accessories for the unit are available on a separate order.
•
Humidity sensor.
The unit with an installed humidity sensor maintains a set indoor humidity level. As the extract air humidity rises above the set point, the
system automatically switches to the maximum speed. As the humidity drops down below the set point the unit returns to the previous
mode.
•
CO
2
sensor
(connected to the controller).
Measures the level of concentration of carbon dioxide in the room and generates a signal that controls the performance of the fan. Air flow
control based on CO
2
concentration is an efficient energy saving solution.
•
VOC sensor
(connected to the controller).
Qualitative assessment of air saturation with contaminants (cigarette smoke, exhaled air, solvent and detergent vapours).The sensor sensitivity
can be adjusted with regards to the expected maximum level of air pollution. Enables on-demand ventilation which results in considerable
energy savings as air is exchanged only upon reaching the preset level of pollution.
•
NKD duct heater for supply air reheating.
The heater maintains the room temperature set by the user. Heater installation and connection to the unit are described in the heater
user’s manual.
DESIGN AND OPERATING PRINCIPLE
Summary of Contents for VUE 250 VB EC Series
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