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Sets the temperature point at which the refrigeration cycle begins.
Sets the temperature point at which the refrigeration cycle stops.
Adjusts the sensor reading to match a known reference temperature.
Defines a delay before the compressor can restart after stopping.
Sets the threshold for an alarm when temperature exceeds a limit.
Sets a delay before the alarm is triggered after the condition is met.
Configures the duration between defrosting cycles.
Sets the maximum duration for each defrosting cycle.
Defines the target temperature range for refrigeration operation.
Procedure for modifying parameter values using the device buttons.
Steps to save modified settings and return to normal monitoring.
The STC-8080H Thermostat is a specialized electronic device designed for precise temperature control in refrigeration and defrosting applications. It functions as a defrosting thermostat, equipped with a single sensor for temperature detection and two independent output relays. These relays are crucial for controlling two distinct components: the refrigeration unit and the defrosting unit, allowing for comprehensive management of cold storage environments.
One of the key features of the STC-8080H is its ability to manage both cooling and defrosting cycles. The device is programmed to initiate refrigeration when the temperature rises above a user-defined set point, ensuring that the refrigerated space maintains its desired coldness. Conversely, it stops refrigeration once the temperature drops to another specified set point, preventing overcooling and conserving energy. This dual-point control system offers flexibility and precision in maintaining optimal conditions for stored goods.
The defrosting function is equally critical for the efficient operation of refrigeration systems. The STC-8080H manages defrosting based on a configurable cycle or interval time, ensuring that ice buildup on evaporator coils is regularly cleared. This prevents reduced cooling efficiency and potential damage to the refrigeration unit. The duration of each defrosting cycle is also user-adjustable, allowing for customization based on the specific needs of the application and environmental conditions. Unlike some more advanced models, this unit controls defrosting solely by time, rather than by evaporator temperature, which simplifies its operation and setup.
The thermostat incorporates an over-temperature alarm function, providing an essential safety and monitoring feature. This alarm is triggered if the temperature in the refrigerated space exceeds a predefined threshold, alerting users to potential issues that could compromise the stored contents. An adjustable delay time for this alarm helps prevent false alarms due to minor, temporary temperature fluctuations, ensuring that alerts are only issued for significant and persistent deviations.
For calibration and fine-tuning, the STC-8080H offers a temperature calibration feature. This allows users to adjust the temperature readings to match an external reference, ensuring accuracy and reliability in temperature monitoring. This is particularly important in applications where precise temperature control is paramount.
Another practical feature is the compressor delay time. This function protects the compressor from short cycling, which can occur if the compressor is rapidly turned on and off. By introducing a delay before the compressor restarts, the STC-8080H helps extend the lifespan of the refrigeration unit and improves its overall efficiency.
The device's user interface is designed for straightforward configuration and monitoring. The function menu provides access to various parameters, each identified by a unique code (e.g., F1 for refrigeration start temperature, F2 for refrigeration stop temperature, F3 for temperature calibration, F4 for compressor delay time, F5 for over-temperature alarm trigger, F6 for alarm delay time, F7 for defrosting cycle/interval time, and F8 for defrosting lasting time). Users can navigate this menu to view and modify settings.
To configure the device, users typically hold a "Set" key for a few seconds to enter the configuration mode. Once in this mode, they can use arrow keys (up/down) to select the desired function to update. Pressing the "Set" key again allows them to check the existing value of the selected parameter. To change a value, they use the arrow keys to adjust it and then press "Set" again to confirm. After configuring all necessary values, a "Rst" (Reset/Save) key is pressed to save the data and return to the normal monitoring status. An important maintenance feature is that if no operation is performed within 30 seconds during configuration, the modified values are automatically saved, and the device reverts to its normal status, preventing accidental data loss.
The STC-8080H also includes a "Forced Refrigeration" mode, which can be activated by holding a specific key for three seconds. This mode allows users to manually initiate a defrosting cycle, which can be useful for maintenance or specific operational needs. The same action can be used to stop the forced defrosting.
Regarding its electrical characteristics, the STC-8080H does not output AC electricity directly. This means that users must wire all live and null (neutral) wires to each port. The manual suggests using jumper wires for convenience during installation, simplifying the wiring process and ensuring proper electrical connections. This wiring approach requires a basic understanding of electrical circuits but is designed to be manageable for those familiar with such installations.
In summary, the STC-8080H Thermostat is a reliable and user-friendly device for managing refrigeration and defrosting. Its core functions include precise temperature control, timed defrosting, over-temperature alarming, temperature calibration, and compressor protection. The intuitive menu system and configuration process make it accessible for various applications, while its robust design ensures consistent performance in maintaining optimal cold storage conditions. The emphasis on timed defrosting and the requirement for external wiring of live and null connections are key operational and maintenance considerations for users.
General| Accuracy | ±1°C |
|---|---|
| Relay Capacity | 10A/220V AC |
| Power Supply | 220V AC ±10%, 50/60Hz |
| Power Consumption | ≤3W |
| Temperature Measuring Range | -50°C to 99°C |
| Sensor Type | NTC Sensor |
| Relative Humidity | 20% to 85% (non-condensing) |
| Mounting size | 71mm x 29mm |
| Control Output | Relay Output |
| Dimensions | 75mm x 34.5mm x 85mm |
