1. Introduction
The Ranco ETC-112000-000 is a microprocessor-based electronic temperature control designed for precise on/off temperature regulation in commercial heating, cooling, air conditioning, and refrigeration systems. This versatile thermostat offers a wide temperature range, single or dual-stage operation, and selectable heating or cooling modes, making it suitable for various applications. Its user-friendly digital display and keypad simplify setup and adjustment.
2. Key Features
- Microprocessor-Based Control: Ensures accurate and reliable temperature management.
- Wide Temperature Range: Operates from -30°F to 220°F (-34°C to 104°C).
- Single or Two-Stage Capability: Supports complex heating and cooling requirements.
- Selectable Modes: Easily switch between heating and cooling applications.
- Digital Display and Keypad: Provides clear temperature readout and intuitive programming with 1-degree resolution.
- Remote Temperature Sensing: Sensor can be located up to 400 feet from the control unit using standard 22 gauge wire.
- Diagnostic Programs: Built-in diagnostics identify hardware, software, or system issues with error codes.
- Keypad Lockout: Prevents unauthorized changes to settings.
- Multi-Voltage Input: Compatible with various power supplies.
- Switch Type: SPDT (Single Pole Double Throw).
- Switch Action: Open/Close on Rise.
3. Package Contents
Upon unpacking, verify that the following item is included:
- 1 x Ranco ETC-112000-000 Line Voltage Thermostat Unit
- 1 x Temperature Sensor
Image: The Ranco ETC-112000-000 Line Voltage Thermostat unit, showing the digital display, control buttons, and the attached temperature sensor cable.
4. Specifications
| Brand | Ranco |
| Model | ETC-112000-000 |
| Control Range | -30°F to 220°F (-34°C to 104°C) |
| Voltage | 24 Volts AC |
| Switch Type | SPDT |
| Switch Action | Open/Close on Rise |
| Controller Type | Hand Control, Digital |
| Display Type | Digital with Backlight |
| Mounting Type | Wall Mount |
| Connectivity Technology | BACnet MS/TP |
| Item Weight | 15.52 ounces (approx. 440 grams) |
| Product Dimensions | 30"D x 8"W x 6"H (Note: These dimensions may refer to packaging) |
5. Installation
Installation of the Ranco ETC-112000-000 thermostat should be performed by a qualified technician in accordance with all local and national electrical codes. Ensure power is disconnected before beginning installation.
- Mounting: Securely mount the thermostat unit to a wall in a suitable location, away from direct heat sources, drafts, or other factors that could affect temperature readings.
- Wiring: Connect the line voltage wiring to the appropriate terminals as indicated in the wiring diagram (refer to the diagram provided with the physical product). Ensure all connections are secure and insulated. The unit operates on 24 VAC.
- Sensor Placement: Position the temperature sensor in the area where temperature control is required. The sensor can be extended up to 400 feet using standard 22 gauge sensor wire. Avoid placing the sensor near heat-generating equipment or in direct sunlight.
- Power Connection: Once all wiring is complete and verified, restore power to the unit.
Important: Incorrect wiring can damage the unit or connected equipment. Always consult the detailed wiring diagram included with your product for specific connection instructions.
6. Operation
The Ranco ETC-112000-000 features a digital display and keypad for easy programming and monitoring.
6.1. Initial Power-Up
Upon initial power-up, the display will show the current temperature detected by the sensor. Annunciators on the liquid crystal display will indicate when the relay is energized.
6.2. Adjusting Temperature Settings
- Press the SET button to enter programming mode.
- Use the UP (↑) and DOWN (↓) arrow buttons to adjust the setpoint temperature. The resolution is 1 degree.
- Press SET again to confirm the setpoint and move to the next parameter (e.g., differential, mode of operation).
- Repeat the process to adjust other parameters as needed.
- Exit programming mode by waiting for a few seconds without input, or by pressing SET until the display returns to showing the current temperature.
6.3. Selecting Heating/Cooling Mode
The mode of operation (heating or cooling) can be selected through the programming menu. Refer to the product's specific programming guide for detailed steps on mode selection and differential settings, especially for two-stage models.
6.4. Keypad Lockout
The unit includes a keypad lockout switch to prevent unauthorized personnel from tampering with the control settings. Consult the product's detailed manual for instructions on how to activate and deactivate this feature.
7. Maintenance
The Ranco ETC-112000-000 thermostat is designed for reliable operation with minimal maintenance. Regular checks can help ensure optimal performance.
- Cleaning: Periodically wipe the exterior of the unit with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Sensor Inspection: Ensure the temperature sensor is clean and free from debris. Verify its placement has not been disturbed.
- Wiring Check: Annually, or as part of routine system maintenance, inspect all wiring connections for tightness and signs of wear or corrosion. Ensure power is off before inspection.
- Calibration: The ETC display temperature cannot be calibrated in the field. If you suspect inaccurate readings, consult the troubleshooting section or contact technical support.
8. Troubleshooting
The ETC model is equipped with diagnostic programs that check for hardware, software, or system problems and display different error codes to indicate where the trouble is. Refer to the table below for common issues and their potential solutions.
| Problem/Error Code | Possible Cause | Solution |
|---|---|---|
| Display is blank | No power to the unit; loose wiring connection. | Check power supply and all wiring connections. Ensure circuit breaker is on. |
| Incorrect temperature reading | Sensor improperly placed; damaged sensor; sensor wiring issue. | Verify sensor placement is away from drafts or heat sources. Inspect sensor and wiring for damage. The display cannot be field calibrated. |
| Unit not responding to settings | Keypad lockout active; incorrect programming; internal fault. | Check keypad lockout switch. Review programming settings. If issue persists, contact technical support. |
| Error Code (e.g., E1, E2) | Hardware, software, or system problem detected by diagnostics. | Consult the full product manual for specific error code definitions and troubleshooting steps. If unable to resolve, contact technical support. |
For detailed error code explanations and advanced troubleshooting, please refer to the complete Ranco ETC product manual or contact Ranco technical support.
9. Warranty and Support
Information regarding the specific warranty period and terms for the Ranco ETC-112000-000 Line Voltage Thermostat was not available in the provided product details. For warranty claims, technical assistance, or to obtain a complete copy of the product manual, please contact Ranco customer support directly or visit their official website.
Always ensure you have your product model number (ETC-112000-000) and purchase date available when contacting support.
