Type Of Temperature Adjustment Modes - ABB 2CLA234009N234001 Instrucciones De Instalación, Uso Y Mantenimiento

CONFIGURATION MENU

12.5 Type of temperature adjustment modes

The chronothermostat operates (by default) in ON/OFF TEMPERATURE DIFFERENTIAL mode with a temperature differential
(hysteresis) value preset at 0.3 °C.
Note: values adjustable from 0.2 °C to 1.2 °C (from 0.3 °F to 2.1 °F). The hysteresis value must be adjusted according to the
equipment's thermal inertia: a low value is recommended for equipment with radiators (e.g. made of cast iron) and a high
value for equipment with fan coils.
As an alternative to the Temperature Differential it is possible to control the temperature in MODULATING PROPORTIONAL
(PrOP) mode; the duration of the cycle is adjustable from 7 to 20 minutes (factory setting 10 minutes). This system allows the
required temperature to maintained more stably, increasing the user's sensation of comfort and saving on energy consumption.
A long cycle is advised for equipment with high thermal inertia (cast iron radiators, floor equipment) and a short cycle for
equipment with low thermal inertia (fan coil).
Example of differential type control
overtemperatura due to the
thermal inerti of the heating body
isteresi
Chapter 12
Example of modulating proportional type control
tempo
overtemperatura due to the thermal
inerti of the heating body
ABB
tempo
59 59