Night Cooling (Bypass); Timer; Recirculation - Helios AIR1 XC 500 L Notice De Montage Et D'entretien

Installation and Operating Instructions
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NOTE
Compact Ventilation Units AIR1 XC
VOD stop time: As soon as the ventilation unit has been operating at the "intensive" ventilation stage for longer than 2
hours, the sensor-controlled operation will stop for the set overrun time. 0 hours means that the sensor-controlled
operation will not stop due to a high sensor requirement.
→ Timer VOD
Timer recirculation
Holiday
Overrun
Timer VOD
Monday
Per 1: XX:XX – XX:XX
Per 2: XX:XX – XX:XX
4�1�4 Recirculation
All extract air is returned to the supply air in recirculation mode.
A separate temperature setpoint and fan offset are available in recirculation mode.
The commissioning assistant must first be activated in order to use the ventilation mode.
Settings for the ventilation mode:
• Log on as User or Administrator
• Call up the "Temperature" menu
• Set the setpoint (temperature) for recirculation
• Set supply air fan offset (deviation)
→ Temperature
Fan control

Timer

Access rights
Temp. setpoint for
recirculation (supply air /
extract air / room))
XX.X °C
SAF offset for
frequency regulation
Recirculation: XX.X m³/h
The recirculation mode can be set as follows:
• Using the recirculation timer
• Using the external switch contact DI8
If the VOD timer and recirculation timer are active at the same time and no air quality sensors reach the sensor limits
(intensive ventilation), the unit will switch to recirculation mode.
If a connected sensor reaches the sensor limit, the recirculation mode will stop and the unit will run in sensor-controlled
operation (VOD).
If the sensor signal reaches the sensor limit, the unit will switch back to recirculation mode.
The recirculation mode will not work if the minimal, normal or intensive timers are running at the same time, since it has
a lower priority.
4�1�5 Bypass
The bypass function contains 3 different scenarios:
– Night cooling
– Free cooling / Free heating
– Prevention of pressure losses
Night cooling
The bypass function can also be used for so-called "night cooling" in the summer months. This function takes advanta-
ge of cool outside temperatures at night to cool the room during the night. The night cooling effect is heavily dependent
on the temperature differences between the intake air/supply and room air, the volume flow and the required cooling
loads.
Night cooling never replaces air conditioning!
Start conditions:
Free night cooling is only activated if all of the following start conditions are met.
– The system has not been deactivated for less than 4 days.
– The outside temperature exceeded the set limit value (e.g. 22 °C) during the last operation.
– It is a certain time of day. E.g. 1 am to 6 am (adjustable).
– One of the following ventilation level is active: Manual minimal, Manual off (standby) or Timer minimal.
– A timer function will be active in the next 24 hours.
↑
OK OK
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↑
OK OK
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↑
OK OK
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38
OK OK
OK OK
OK OK
EN