CLIMATIC™ 50 User manual - Lennox

THERMOSTAT / HYGROSTAT – Set points
SET POINTS, TEMPERATURE
Function
Climatic is programmed in order to maintain a temperature as comfortable as possible with the most economic usage
of the unit.
Description
The room temperature is maintained between a minimum
threshold - corresponding to the heating point - and a maximum
threshold - corresponding to the cooling point. The regulation
“dead zone” is defined between these two thresholds.
In order to be user friendly, one temperature set point is used.
This set point is in the middle of the dead zone.
If this set point is modified, it has priority on the 2 thresholds, but
the dead zone range remains defined by the difference between
the 2 thresholds.
If the Thresholds 3322 and 3323 are modified, set point 3311 is
automatically calculated to their average value.
3311 � Customer temperature set point (°C), adjustment by zone.
3322 � Cooling temperature threshold (°C), adjustment by zone.
3323 � Heating temperature threshold (°C), adjustment by zone.
Set point modification by an external signal
The set point can be remotely modified with a signal 4-20mA (see CUSTOMIZED INPUT / OUTPUT)
For a 4 mA signal the temperature set point is decreased by 5°k
For a 20 mA signal the temperature set point is increased by 5°k
A linear rule is applied between the two signals.
DYNAMIC SET POINT
Function
Cooling Threshold (3322)
Customer set point (3311)
Heating Threshold (3323)
CLIMATIC50 – IOM – Rooftops/ Aircoolair CL50-ROOFTOPS-IOM-1107-E 15
Dead zone
∆
∆
Cooling Mode
Heating Mode
This function allows to obtain a proportional shift of the cooling threshold according to the outside temperature.
Description
The cooling threshold starts to increase once the outside air temperature is over the cooling threshold plus the value of
the dynamic set point.
If you don’t wish to use this function, allot to the option dynamic set point the value 99.9°c
Example:
If the cooling threshold is equal to 25°C and that the dynamic set point is equal to 6K
The cooling threshold drift will start for an outside temperature of 31°C (25°C + 6K) and then the threshold will follow the
outside temperature evolution keeping a 6K difference.
3321 � Dynamic set point (K), adjustment by zone.
Ambient Temp °C