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3 - FEATURES
The calculated compensations are added to the selected setpoint 1 or 2 to give the setpoint value to be used.
270
270,1
270,2
270,3
270,5
270,6
270,7
3.16 - Downgraded fresh air flow rate
A downgraded fresh air flow rate function based on the outdoor temperature is used to limit the flow rate if the outdoor temperature is
low.
This function is only selectable only if the fans control is based on flow rate.
If the downgraded fresh air flow rate function is selected (P271), a downgraded flow rate coefficient is calculated based on the fresh
air temperature, in accordance with the curve below:
The intake flow rate setpoint to be used for control purposes is the selected setpoint 1 or 2 multiplied by the downgrading percentage.
The exhaust flow rate setpoint to be used for control purposes is the selected setpoint 1 or 2 multiplied by the downgrading percentage.
271
271,1
271,2
271,3
3.17 - Time management
The date and time are set using parameters P102 and P103. The date enables annual/monthly/weekly programming to be used and
the time at which a fault occurs to be recorded.
The PLC contains a battery to prevent the time being wiped in the event of a power cut. If the time is not stored after a power cut, the
battery needs to be replaced (service life approximately 10 years – varies according to ambient conditions).
102
103
3.18 - Time schedule
The time schedule is used to change the unit's operating mode (off, setpoints 1, setpoints 2, frost protection, etc.) according to the
time, day of the week or the season.
The PLC authorises 6 weekly programming periods and 6 annual programming periods, which may
overlap and be individually validated.
Requested state
Frost protection
Night cooling (programmed weekly only)
On setpoint 2
Weekly program 1 to 6
Temperature setpoint compensation activation
Heating compensation start fresh air temp
Heating compensation end fresh air temp.
Heating compensation max. setpoint difference (-10.0°C / 10.0°C)
Cooling compensation start fresh air temp.
Cooling compensation end fresh air temp.
Cooling compensation max. setpoint difference (-10.0°C / 10.0°C)
Downgraded coefficient (in%)
100%
P271.3
P271.2
P271.1
Downgraded fresh air flow rate activation
Downgraded mode start fresh air temperature
Downgraded mode end fresh air temperature
% min. flow rate in downgraded mode
Date
Time
Off
Fresh air temperature
Display condition
P154 Target temperature selection = room
P151 Night cooling = with
P160 Setpoint 1/Setpoint 2 selection = terminal or CMS
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