ETC-974.REF. Temperature Controller.Double-Sensor.
The ETC-974 is a high-performance, double-sensor microcomputer temperature controller specifically designed for medium and low-temperature refrigeration units. It manages cooling, defrosting, and fan functions independently.
Technical Specifications
- Measurement Range: -50.0°C to 150°C.
- Control Range: -50.0°C to 120°C.
- Accuracy: ±1°C (-30°C to 50°C); ±2°C for other ranges
- Resolution: 0.1°C or 1°C [8].
- Power Supply: 230VAC ±10%, 50/60Hz
- Output Capacity (3 Relays):
- Refrigeration: 8A / 220VAC.
- Defrost: 8A / 220VAC.
- Fan: 8A / 220VAC.
- Sensors: Two NTC sensors included (one for room/cabinet temperature, one for the evaporator/defrost termination
Key Features
- Independent Controls: Manages the compressor, defrost heaters, and evaporator fans separately for optimized cooling
- Defrost Management: Supports multiple defrost termination modes (based on time or temperature) and types (electric or hot gas)
- Protection: Includes a compressor start-up delay and a front panel rated IP65 (water and dust resistant)
- Safety Alarms: Visual and audible alerts for over-temperature limits and sensor failures (E1 or E2)
- Copy Card Port: Allows for rapid parameter duplication across multiple units for batch installations
Basic Operation
- Access User Menu: Press and release the SET key to view and modify the target temperature.
- Access Administrator Menu: Press and hold SET for more than 5 seconds. If prompted for a password (PA1), the factory default is usually 000 or 111.
- Manual Defrost: Press and hold the UP (▲) key for 5 seconds to manually initiate a defrost cycle.
Wiring Overview
- Terminals 1 & 2: Power supply input (230VAC).
- Terminal 3: Common line for relays.
- Terminal 4: Refrigeration (Compressor) output.
- Terminal 5: Defrosting output.
- Terminal 6: Fan output.
- Terminals 7–10: Inputs for the two NTC temperature probes.
Description
Description
The ETC-974 is a high-performance, double-sensor microcomputer temperature controller specifically designed for medium and low-temperature refrigeration units. It manages cooling, defrosting, and fan functions independently.
Technical Specifications
- Measurement Range: -50.0°C to 150°C.
- Control Range: -50.0°C to 120°C.
- Accuracy: ±1°C (-30°C to 50°C); ±2°C for other ranges
- Resolution: 0.1°C or 1°C [8].
- Power Supply: 230VAC ±10%, 50/60Hz
- Output Capacity (3 Relays):
- Refrigeration: 8A / 220VAC.
- Defrost: 8A / 220VAC.
- Fan: 8A / 220VAC.
- Sensors: Two NTC sensors included (one for room/cabinet temperature, one for the evaporator/defrost termination
Key Features
- Independent Controls: Manages the compressor, defrost heaters, and evaporator fans separately for optimized cooling
- Defrost Management: Supports multiple defrost termination modes (based on time or temperature) and types (electric or hot gas)
- Protection: Includes a compressor start-up delay and a front panel rated IP65 (water and dust resistant)
- Safety Alarms: Visual and audible alerts for over-temperature limits and sensor failures (E1 or E2)
- Copy Card Port: Allows for rapid parameter duplication across multiple units for batch installations
Basic Operation
- Access User Menu: Press and release the SET key to view and modify the target temperature.
- Access Administrator Menu: Press and hold SET for more than 5 seconds. If prompted for a password (PA1), the factory default is usually 000 or 111.
- Manual Defrost: Press and hold the UP (▲) key for 5 seconds to manually initiate a defrost cycle.
Wiring Overview
- Terminals 1 & 2: Power supply input (230VAC).
- Terminal 3: Common line for relays.
- Terminal 4: Refrigeration (Compressor) output.
- Terminal 5: Defrosting output.
- Terminal 6: Fan output.
- Terminals 7–10: Inputs for the two NTC temperature probes.
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