The Carel IR33+ controller has a two-level menu system for programming the operation of the case; Level 1 and Level 2 program settings. Unlike IR33, the IR33+ control system is easier to use with a password. HOW TO CHANGE LEVEL 1 AND 2 CONTROL SETTINGS 1. Press and hold the [PRG] button down until the display shows a flashing "0". 2.. Programming tips Carel controllers 1. Setting the Temperature a. Press the "set " button and hold a few seconds and a number will flash. This number is the current temperature set point. To change, use the "up" or "dn" arrow key. Press the "set" key to lock in the new temperature setting. 2. Changing the temperature calibration.
Overall, the Carel Easy thermostat is a reliable and efficient solution for temperature control in various HVAC applications. With its user-friendly interface, accurate temperature sensing, and programmable settings, it provides comfort and energy savings for residential, commercial, and industrial settings.. View and Download Carel Easy user manual online. electronic digital thermostats with defrost control. easy thermostat pdf manual download.. Display the controller to make it operative. CAREL then recommends to check that the display does not show any alarm signals (see par. "5.1 Table of alarms and signals" on page 31), then set the time.