Warning
This is where the number of operating days is set which must elapse before an
alarm on incipient filter soiling in the outdoor air and extract air filters is signalled.
The factory setting is 100 days.
Alarm
This is where the number of operating days is set which must elapse before an
alarm for changing the outdoor air and extract air filters is signalled. The factory
setting is 100 days.
NB:
When the warning is set to the same number of days as the Alarm, the system will
not signal a warning.
Filter change
In the case of filter change, select "Yes", and the date for filter change will be
saved and the operating hours counter will be zeroised.
Menu 8.1
The same settings that can be configured in Menu 3.1.4 can be configured here.
Menu 3.1.5 - Night-time cooling
Function
Night-time cooling is typically used during hot summer periods in buildings which
are unoccupied during the night. During hot periods it may be desirable to cool
down the building during the night. The aim is to reduce the energy required for
cooling during the day by exploiting the lower night-time temperature combined
with high air replacement. Night-time cooling involves high airflow ventilation, with-
out turning on the cooling unit.
Conditions for
night-time cooling
The control system performs a five-minute "test run" to check the following condi-
tions are met before activating the night-time cooling function:
● Outdoor air temperature must be lower than the room temperature
● Prior to initiating night-time cooling, there must not have been any heating re-
quirement within a time interval defined in the night-time cooling menu
● Heating coils and rotor operation must not be active during night-time cooling
(does not apply during the test run)
● As a factory default setting (set in Menu 3.1.5.9 Operation blocking), the
night-time cooling function can only be activated if Comfort operation is
scheduled for the following day
● Extract air temperature must be higher than the set point
Conditions not met
If the above conditions are not met at the Start time, the control system will per-
form a test run once an hour (until an hour before the Stop time) to check whether
the conditions for starting night-time cooling can now be met.
Override
The following can override the night-time cooling function:
● If the system is controlled by a PIR sensor.
● If the Manual indoor air quality level is active
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Starting up the unit for operation
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Summary of Contents for EXact2 HMI2-350-TOUCH
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