• 22 •
(2823):
(3822):
(3825):
(3831):
(3832):
(3833):
(3841):
(3842):
(3843):
(3853):
(3854):
(3855):
CLIMATIC RT_UNITARY-IOM-1508-E
COMPONENTS
Outdoor temperature
The free cooling and the free heating are also enabled according to the outside air temperature. There are 2 settings (3832) and
(3833) for the free cooling and two settings (3842) and (3843) to defi ne the start and stop temperature thresholds.
Outdoor humidity (Optional)
If humidity control option is selected, the Free-cooling is stopped if the external absolute humidity (water weight) is higher than the
indoor absolute humidity
Free contact (Optional)
Stop of Free-Cooling by closing customized free contacts (see minimum fresh air § above).
[No FreeC] = This function is disabled.
• Contact closed on [No F.A], the unit will close completely the fresh air damper.
• Contact closed on [All F.A], the unit will open completely the fresh air damper.
• Contact closed on [No FreeC] or [No FreeH], the function is disabled.
Settings
The different settings to adjust the fresh air damper are available in the menu:
set point of minimum fresh air
set point of maximum fresh air
state of calibration function
setpoint for activation operation of function free cooling
outside lower temperature threshold, unload free cooling
outside upper temperature threshold, unload free cooling
setpoint for activation operation of function free heating
outside lower temperature threshold, unload free heating
outside upper temperature threshold, unload free heating
minimum threshold for control
maximum threshold for control
upper air quality threshold of alarm
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