Lennox CLIMATIC series User Manual page 24

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
(2823):
set point of maximum fresh air
(3822):
(3825):
state of calibration function
(3831):
setpoint for activation operation of function free cooling
(3832):
outside lower temperature threshold, unload free cooling
(3833):
outside upper temperature threshold, unload free cooling
(3841):
setpoint for activation operation of function free heating
(3842):
outside lower temperature threshold, unload free heating
(3843):
outside upper temperature threshold, unload free heating
(3853):
minimum threshold for control
(3854):
maximum threshold for control
(3855):
upper air quality threshold of alarm
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