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TF7128_A_NOT_INST_DXR230_EXC_MB
Aereco S.A.
4) SETTINGS :
This menu allows to configure Automatic mode, free cooling/free warming mode, Boost mode,
Absence mode and Stop mode within a choice of airflows set points and duration set points.
REGULATION RULES :
- Supply airflow = exhaust airflow
- Customer may choice within a list of different exhaust pressure measured in the compensation
valve (60Pa, 80Pa, 100Pa or 120Pa).
- Dampers in the hub open according to the relevant IAQ sensor.
AUTOMATIC MODE
, the DXR unit drives the exhaust fan motor in such a way that:
- Exhaust fan motor proceedes a constant pressure within the compensation valve (-60 Pa, -80 Pa,
-100 Pa, or -120 Pa).
- Supply fan, motor ensure a supply airflow = exhaust airflow
- Hub damper open in such a way that according to the dedicated room air quality, room supply
airflow ≥ 8 m
3
/h if air quality is good, and room supply airflow encreases up to 28 m
3
/h if room air
quality is not enough.
- Compensation valve opens when the need of supply airflow is higher than current exhaust airflow.
ABSENCE MODE,
We’ve been asked to provide an absence mode as an additional mode of regulation. This mode has
to be started with a human action (customer has to press on a button) and then, the customer has
to choose within a durations list (1 day, 2-3-4-5-6 days, 1,2,3,4 weeks).
Absence mode run a constant 40m
3
/h airflow regulation.
OVER VENTILATION MODE,
Over ventilation mode allows to increase ventilations airflows with the use of bypass rules. Over
modulation mode has to be started with a human action (customer has to press on a button) and
then, the customer will have to choose within a duration list (1-2-3-4-5-6-12-18-24 hours).
During an over ventilation period, bypass is running like if the DX system was in an automatic
mode, but all dampers (in the HUB and in the compensation valve) open in such a way that supply
airflows are:
- 28m
3
/h in each pipe for HUB 6x75mm and HUB 8x75mm
- 40m
3
/h in each pipe for HUB 6x100mm.
FREE COOLING / FREE WARMING MODE,
Free Cooling mode allows to increase ventilations airflows with a Bypass ON. To enable the free
cooling mode, the external T° has to be compliant with the free cooling regulation rules (need to
refresh inside, and outside T° < inside T° with outside T° > 15°C minimum to prevent condensate
phenomenon (the 15°C threshold can be set). If not, the device enables the automatic regulation
waiting for the outside T° to be compliant with the free cooling mode.
To enable the free warming mode, the external T° has to be compliant with the free warming
regulation rules (need to warm inside, and outside T° > inside T°). If not, the device enables the
automatic regulation waiting for the outside T° to be compliant with the free warming mode.
Free Cooling / free warming mode has to be started with a human action (customer has to press on
a button) and then, the customer will have to choose within a duration list (1-2-3-4-5-6-12-18-24
hours). During a free cooling / free warming period, bypass is ON, and all dampers (in the HUB and
in the compensation valve) open in such a way that supply airflows are:
- 28m
3
/h in each pipe for HUB 6x75mm and HUB 8x75mm
- 40m
3
/h in each pipe for HUB 6x100mm.
STOP MODE
, this mode allows to stop the 2 fan motors. This mode may be very useful, especially
when works are poceeded in the dwelling. This mode allows not to clog the filters.