Introduction; Presentation - ABB 2CLA234009N234001 Instrucciones De Instalación, Uso Y Mantenimiento

ABB

INTRODUCTION

1 INTRODUCTION
1.1

Presentation

Dear Customer, Thank you very much for choosing one of our products.
The weekly chronothermostat, suitable for heating and/or air-conditioning equipment, has a clear backlit display for real-time
control of all its functions.
The chronothermostat is factory-programmed and therefore, as soon as you connect it to the power supply, you must set
the current date and time and confirm the automatic conversion to daylight saving time summer/winter hours (EURO = Italy
and Central Europe zone UTC+1), and it will be ready for immediate use displaying the current date and time and a standard
temperature/time profile in winter mode (heating).
Its user-friendly menu-based navigation is its main feature. In fact, while having a wide range of functions, it is very easy to
use. Its permanent memory already has 2 winter programs configured and 2 summer programs with 3 temperature levels +
antifreeze designed to offer maximum comfort, but they can be modified within a matter of seconds and you can choose the
desired temperatures throughout the day (every 30 minutes even!) and for every day of the week. The factory setting for the
chronothermostat is to control the temperature in the Differential ON/OFF mode, and the hysteresis can be set from 0.2 °C to
1.2 °C to adapt to the thermal inertia specific to your equipment. Alternatively, it is possible to select the modulating proportional
mode of functioning with configurable duration cycles (of 7 to 20 minutes): this system allows the desired temperature to be
maintained more stably, increasing the user's sense of comfort, and is especially suited to equipment with high thermal inertia,
like underfloor panel heaters for example.
The configured temperature scale is expressed in degrees centigrade (Celsius) with the possibility of calibrating the room
temperature measurement by establishing an offset value (from -3 to +3 °C). When switching to degrees Fahrenheit, all
temperature displays will be updated according to the new scale.Special attention has been paid to energy saving: provisional
or permanent manual forcing with temperature SET irrespective of the weekly program in progress, the Vacation program,
suspension for housekeeping, optional blocking of the configured Set temperatures (MAX/MIN), the adjustable antifreeze
temperature value, commands through an external contact (e.g. optional telephone programmer), help to avoid wasting energy,
with the ensuing economic saving: see the description of these and other functions on the following pages.
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Chapter 1