Description
ICM Controls Universal A2L Refrigerant Detection System with R32/R454B Sensor
Automatic Leak Detection, Compressor Protection, and Fan Mitigation Control
The ICM Controls ICM-UA2L-24C-DUAL is an A2L refrigerant detection and mitigation control system designed for equipment using R454B and R32 refrigerants. The system continuously monitors for refrigerant leaks and provides automatic compressor lockout and fan activation when leak conditions are detected, helping support compliance with A2L safety requirements.
Designed for OEM and HVAC/R applications, the control board supports communication with dual refrigerant sensors via Modbus and includes dedicated outputs for fan operation, alarms, and compressor control. Built-in fault monitoring, LED status indicators, and automatic recovery features help simplify system integration and operation. The enclosed assembly includes dual refrigerant sensors and a terminated wiring harness for installation convenience.
Key Features & Benefits
- Detects R454B and R32 A2L refrigerants
- Automatic compressor lockout upon leak detection
- Activates system fan during refrigerant mitigation events
- Modbus communication with refrigerant sensors
- Fault monitoring with automatic recovery
- Status and power LED indicators
- Dry-contact fan output (N.C.) and alarm output (N.O.)
- Dry-contact compressor control (CC) output
- Common 1/4″ quick-connect terminations
- Supports multiple leak detection sensors
- Includes refrigerant sensor and terminated wire harness
Specs
| Working Voltage | 24 VAC, 50/60 Hz Input (SELV/Class 2) |
| Frequency | 50/60 Hz |
| Fault Recovery | Automatic |
| %LFL Trip Point | 14.5% |
| %LFL Recovery Point | 8% |
| Lockout Time (Anti-Short Cycle) | 300 seconds |
| RS-485 Port Output | 80 mA @ 5 VDC per port maximum |
| K1 Relay | Dry Contact SPST |
| K2 Relay | Dry Contact SPDT |
| K1 NO Output | CC Output; Class 2, 100 VA (Nominal 2.5A @ 24V) |
| K2 NC Output | Fan Output; Class 2, 100 VA (Nominal 4A @ 24V) |
| K2 NO Output | Alarm Signal; Class 2, 100 VA (Nominal 4A @ 24V) |
| Operating Temperature | -40°C to 70°C (-40°F to 158°F) |
| Storage Temperature | -40°C to 85°C (-40°F to 185°F), not powered |
| Relative Humidity | 0 to 95% RH |
| Dimensions | 2.75″ x 4″ |
