Subzero CRC-1200
Sub-Zero CRC-1200 Cold Room Controller
Advanced cold-room controller for refrigeration systems with defrost management, evaporator control, fault logs, RS485 Modbus connectivity, and Quick Freeze mode. Ideal for walk-in chillers and cold storage facilities.
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The Sub-Zero CRC-1200 is an advanced cold-room controller designed for commercial refrigeration systems. It supports intelligent defrost cycles, Quick Freeze mode, evaporator fan control, and safety interlocks, ensuring precise temperature control and energy-efficient operation in cold storage applications.
Key Features
Supports time-based and temperature-based defrost
Quick Freeze mode with temporary low setpoint
RS485 Modbus RTU communication for BMS/SCADA integration
LCD + 7-segment display for real-time system status
Supports heater defrost or hot gas defrost
The last 10 fault logs stored in memory
Door input, high/low pressure inputs
Evaporator fan control based on coil temperature
Post-drip and pre-drip logic for efficient defrost drainage
Pump-down mode for solenoid valve control
Keypad lock to prevent unauthorized changes
Rugged ABS housing designed for cold & humid environments
Technical Specifications (Table)
(Extracted from pages 9–11)
| Parameter | Specification |
|---|---|
| Power Supply | 230 VAC ±15%, 50 Hz |
| Digital Inputs | 4 (3×230VAC + 1×Potential Free) |
| Inputs | Room & Coil Sensors (NTC) |
| Temp Range | –50°C to +35°C |
| Display | 2-digit 7-seg + 16×2 LCD |
| Communication | RS485 (Modbus RTU), 9600 baud |
| Digital Outputs | 7 relays (8A/250VAC) |
| Controlled Loads | Compressor, Condenser Fan, Evaporator Fan, Heater, Solenoid (Pump Down), Alarm, Lamp |
| Quick Freeze | Time-based operation |
| Defrost Modes | Heater or Hot Gas |
| Defrost Frequency | 1–12 hours |
| Defrost Duration | 0–45 min |
| Housing | ABS + Polycarbonate front |
| Dimensions | 227 × 200 × 93 mm |
| Mounting | Wall/Panel mount |
| Fault Logging | Last 10 logs |
| Protection | Software lock + relay protection |
| Sensor Accuracy | ±1°C |
Applications
Walk-in cold rooms
Commercial refrigeration
Food storage & warehousing
Pharmaceuticals cold rooms
Cold-chain logistics
Supermarket chilling rooms
Blast chillers (with Quick Freeze mode)
Industrial refrigeration plants
What’s in the Box
Sub-Zero CRC-1200 Cold Room Controller
Room Sensor (NTC) – 5 m
Coil Sensor (NTC) – 3 m
User Manual
Mounting Screws
FAQ
1. Does the CRC-1200 support hot-gas defrost?
Yes. Select Defrost Type = Hot Gas (1) for compressor-based defrost.
2. Can I monitor the controller remotely?
Yes. CRC-1200 supports RS485 Modbus RTU for BMS/SCADA integration.
3. Is Quick Freeze mode automatic?
Quick Freeze activates by holding the UP key for 4 seconds and runs for the programmed duration.
4. What happens during a probe failure?
The controller supports Compressor ON modes during probe failure to protect the system.
5. Does the controller have a keypad lock?
Yes. The keypad can be locked to prevent parameter tampering.