EN
UAB AMALVA we reserve the right to make changes without prior notice.
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7.5.2.1. Air quality control
Air quality control is designed according to:
•
CO
2
sensor
1
[0...2000 ppm];
•
air quality sensor VOCq [0...100 %];
•
air pollution sensor VOCp [0...100 %];
•
relative humidity sensor [0...100 %];
•
temperature sensor [0...50 ºC].
Depending on the type of the selected sensor, the value of the air quality func-
tion to be maintained is set, and the air handling unit intensity will be adjusted ac-
cording to that value. Ventilation intensity will be increased automatically in the case
of deviation from the set value and decreased again when it is approached. For
example, if the unit is designed with the CO
2
maintenance function and is equipped
with a CO
2
sensor, after setting value 800 ppm, this set CO
2
level will be maintained
by adjusting ventilation intensity, i.e. ventilation intensity will be increased if the CO
2
level grows and will be decreased when it returns to the previous condition.
The function of air quality operates only if no other below function is
active at the same time:
• summer night cooling;
• min. temperature control;
• outdoor compensated ventilation.
7.5.2.2. Operation on demand
The air handling unit start-up function is designed to start the unit which currently off,
when one of the selected parameters has exceeded the critical limit.
The function provided for the start-up of the unit according to:
•
room CO
2
sensor;
•
room air quality sensor VOCq;
•
room air pollution sensor VOCp;
•
room relative humidity sensor;
•
room temperature sensor.
Operation on demand (start-up / shut-down) is performed by the same
sensor which is used in the control of the “Air quality function”.
A room sensor with the analogue output (0...10 V DC) should be de-
signed for this function.
7.5.2.3. Outdoor compensated ventilation
The ventilation compensation function adjusts the air volume depending on the ex-
isting outdoor temperature. It is possible to enter four temperature points, with two
of them defining winter conditions and the other two defining summer conditions.
When compensation start and end points for both winter and summer seasons are
entered (it is also possible to enter only one of them, example only winter compen-
sation; in this case, the start and the end points of summer compensation should be
the same), the current ventilation intensity will be decreased in proportion according
to the outdoor temperature until it reaches the minimum possible ventilation level
of 20 %.
The ventilation compensation function does not operate when summer
night cooling function is active.
1
Factory setting.
Reset settings
Enable
Setpoint 1
1000 ppm
Setpoint 2
880 ppm
Mode 1
COMFORT 1
Mode 2
COMFORT 2
Air quality control
Reset settings
Enable
Setpoint
1000 ppm
Operation on demand
Reset settings
Enable
Winter stop
-15 °C
Summer start
25 °C
Winter start
5 °C
Summer stop
35 °C
Outdoor compensated ...
