IR33Z7HR20 TEMPERATURE CONTROLLER

Product Description

The IR33Z7HR20 is a CAREL IR33 series universal electronic temperature controller designed for precise regulation of temperature in HVAC, refrigeration, and industrial systems. It uses advanced PID and ON/OFF control logic to manage cooling, heating, defrost, and fan operations. The controller features multiple relay outputs and is widely used in commercial refrigeration units, cold rooms, display cabinets, and industrial cooling systems.

Key Features

• High-precision electronic temperature control system
• Multi-output relay control for compressor, fan, and defrost functions
• Supports NTC, PTC, and other temperature sensor inputs
• Advanced PID / ON-OFF control logic
• Auto-tuning for stable and efficient operation
• Built-in alarm and fault monitoring system
• Panel-mount compact industrial design
• Optional communication interface (RS485 module support)
• Suitable for refrigeration, HVAC, and industrial automation
• IP65 front protection for harsh environments

Specifications

1. Product Type: Digital Temperature Controller
2. Model: IR33Z7HR20
3. Brand: CAREL
4. Series: IR33 Universal / IR33-DN33
5. Display: Single-line LED display
6. Control Method: PID / ON-OFF control
7. Input Types: NTC, PTC, PT1000 (variant dependent)
8. Output Type: 4 relay outputs (compressor, fan, defrost, alarm functions)
9. Supply Voltage: 115–230V AC, 50/60 Hz
10. Temperature Range: -50°C to +150°C (sensor dependent)
11. Mounting Type: Panel mount (76.2 × 34.2 mm cut-out)
12. Protection Rating: IP65 front panel
13. Operating Temperature: -10°C to +60°C
14. Communication: Optional RS485 module support
15. Application: Refrigeration systems, cold rooms, display cabinets, HVAC systems, industrial cooling and heating control