CAREL IR33B93MP20 IR33 Series Refrigeration Controller

Overview

The CAREL IR33B93MP20 is a panel-mounted refrigeration controller from the CAREL IR33 parameter controller series. The CAREL IR33B93MP20 reads temperature signals from NTC sensors and executes compressor regulation, defrost control, evaporator fan management and alarm output for refrigerated cabinets, cold rooms and beverage cooling units. The CAREL IR33B93MP20 features digital LED display and local keypad for on-site parameter setting, and supports configuration via VPM software and parameter key. It is widely stocked as spare control unit for commercial refrigeration equipment and cold storage automation maintenance.

Features

The CAREL IR33B93MP20 supports multiple control logics including direct cooling and reverse heating, with adjustable defrost modes such as electric defrost and hot gas defrost. The CAREL IR33B93MP20 integrates relay outputs for compressor, defrost heater, evaporator fan and auxiliary alarm. It carries built-in temperature alarm, probe fault detection and anti-short-cycle protection for the compressor. The CAREL IR33B93MP20 adopts standard DIN panel cutout mounting and supports HACCP data recording for food refrigeration applications. The unit is powered by AC mains and uses original pinout definition for direct replacement of the same IR33 series controllers.

Specs

Device Type: Refrigeration parameter controller Model: CAREL IR33B93MP20 Series: IR33 Sensor Input: NTC temperature probe Display: Digital LED display Control Functions: Compressor control, defrost, evaporator fan, alarm relay Configuration: Local keypad, VPM software, parameter key Mounting: Standard panel cutout Protection Grade: IP54 front panel, IP20 rear side Operating Temperature: -10°C to +55°C Application: Refrigerated display cabinet, cold storage room, beverage cooler, ice machine, commercial refrigeration unit

Principle

The CAREL IR33B93MP20 continuously samples temperature signals from NTC probes installed inside the refrigeration chamber and evaporator. The internal microprocessor compares the measured temperature with the set target value, then switches the relay outputs to start or stop the compressor, trigger defrost cycle and control fan operation. The CAREL IR33B93MP20 monitors probe disconnection and out-of-limit temperature, and activates alarm relay when abnormal conditions occur.

Applications

The CAREL IR33B93MP20 is used for temperature control of supermarket refrigerated showcases, cold storage rooms and beverage cooling equipment. It serves automatic refrigeration cycle management and temperature monitoring for food preservation equipment. The CAREL IR33B93MP20 applies to spare stock and emergency repair of legacy CAREL IR33 refrigeration control assemblies. It also supports refrigeration equipment renovation and parameter resetting projects.