Humidity Setpoint - Lennox CLIMATIC series User Manual

AIR MANAGEMENT
HUMIDITY SET POINT (OPTION)
Function
The CLIMATIC offers in option, the possibility to manage the relative humidity. The controller is programmed to maintain an humidity
as comfortable as possible with the most economic usage of the unit.
Description
The relative humidity is maintained between 2 thresholds (a minimum threshold corresponding to the point of humidifi cation and a
maximum threshold corresponding to the point of dehumidifi cation).
During dehumidifying mode:
• The fan speed is forced on low speed threshold (2329).
• If the Outside humidity is high (> dehumidifying setpoint (2271) - 10.0%hr) then Free-Cooling or Free-Heating is disabled and
the fresh air damper is closed.
During Humidifi cation mode:
• If the outside humidity is low (<humidifying setpoint (2272) + 10.0%hr) then Free-Cooling or FreeHeating is Disabled and the
damper is closed.
Humidity mode
The dehumidifi cation is ensured by the compressors in cooling mode or during the dead zone.
Note that if this function is activated, priority is given to the romm humidity contrôol instead of the room temperature control.
The humidifi cation is ensured by a 0/10V signal controlled by a PI algorithm.
The humidifi cation and deshumidifi cation thresholds can be specifi ed according to the scheduling and can take different mode for each
schedule mode (Night, Day, Day I, Day II and BMS).
9h
Day I mode
Settings
The different settings to adjust the fl ow control are available in the menu:
Setpoint to activate function
(3241):
set point of dehumidifi cation
(2271):
set point of humidifi cation
(2272):
(3244): integral time control for dehumidifi cation
(3245): integral time control for humidifi cation
• 12 •
30
2271
12h/0h
Day mode
60
3h
Night mode
20
50
6h
50
Ambient humidity % (HR)
2272
12h/24h
Night mode
20
Day mode
60
21h
Day II mode
Day I mode
30
50
18h
15h
CLIMATIC RT_UNITARY-IOM-1508-E