1. Introduction and Overview
This manual provides essential information for the proper installation, operation, and maintenance of the Norlake 139799S Programmed Dixell Control for Model XR70. This unit is an OEM replacement part designed for commercial refrigeration systems, ensuring precise temperature management and reliable performance.
The Dixell XR70 control is a sophisticated electronic controller optimized for refrigeration applications, featuring a digital display and user-friendly interface for setting and monitoring system parameters.
2. Product Features
- OEM replacement part, ensuring compatibility and performance.
- Programmed for specific Norlake XR70 applications.
- Digital display for clear temperature readings and status indicators.
- Adjustable temperature control for precise refrigeration management.
- Compact form factor for easy integration into existing systems.
- Designed for reliability in commercial foodservice environments.
3. Specifications
| Specification | Value |
|---|---|
| Model Name | XR70 |
| Item Model Number | 139799S |
| Brand | Norlake |
| Product Dimensions | 6"D x 5"W x 9"H (approx. 15.24 x 12.7 x 22.86 cm) |
| Item Weight | 0.7 Pounds (approx. 0.32 kg) |
| Country of Origin | Italy |
| Power Supply | 120V/230V (as per unit labeling) |
| Probe Type | NTC-pic |
| Max Power Consumption | 4VA MAX |
4. Setup and Installation
Installation of the Norlake 139799S Dixell Control XR70 should only be performed by qualified personnel, adhering to all local and national electrical codes. Ensure the main power supply to the refrigeration unit is disconnected before beginning any installation work.
4.1 Physical Installation
The control unit is designed for panel mounting. Carefully insert the controller into the designated opening in the control panel. Secure it using the provided mounting clips or screws, ensuring a snug fit to prevent vibration.
4.2 Electrical Connections
Refer to the wiring diagram printed on the side of the control unit for precise terminal connections. Common connections include:
- Power Supply: Connect the main power supply (120V or 230V, as appropriate for your model) to the designated terminals.
- Probes: Connect the NTC temperature probes to the specified probe input terminals. Ensure correct polarity if applicable.
- Compressor Output: Connect the compressor load to the appropriate relay output terminals.
- Fan Output: Connect the evaporator fan load to its respective relay output.
- Defrost Heater Output: Connect the defrost heater load to its relay output.
- Alarm/Auxiliary Outputs: Connect any alarm or auxiliary devices as required by your system configuration.
Double-check all connections for tightness and correct wiring before restoring power. Improper wiring can damage the unit or lead to unsafe operating conditions.
This image displays the Norlake 139799S Dixell Control XR70, highlighting its digital display, control buttons (SET, up, down, light/fan), and the terminal block for electrical connections and sensor inputs. The unit is designed for panel mounting and includes a white plastic bracket for securing it.
5. Operating Instructions
The Norlake 139799S Dixell Control XR70 is pre-programmed for specific Norlake refrigeration applications. Basic operation involves monitoring the display and making minor adjustments as needed.
5.1 Display and Indicators
The digital display shows the current temperature. Various icons may illuminate to indicate the status of the compressor, defrost cycle, fan, or alarms.
5.2 Setting the Setpoint Temperature
- Press the SET button once. The current setpoint temperature will flash on the display.
- Use the UP (▲) or DOWN (▼) arrow buttons to adjust the setpoint to the desired temperature.
- Press the SET button again to confirm and save the new setpoint. If no button is pressed for a few seconds, the display will revert to showing the current temperature without saving changes.
5.3 Manual Defrost
To initiate a manual defrost cycle (if enabled in the programming), press and hold the DEFROST button (often indicated by a snowflake icon) for approximately 3-5 seconds until the defrost indicator illuminates.
5.4 Accessing Parameters (Advanced)
Accessing and modifying advanced parameters requires specific knowledge of Dixell programming codes and the Norlake system. Incorrect parameter changes can lead to system malfunction or damage. Refer to specific Dixell XR70 programming manuals or consult a qualified technician for advanced settings.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your Norlake 139799S Dixell Control XR70.
- Cleaning: Periodically wipe the display and control buttons with a soft, damp cloth. Do not use abrasive cleaners or solvents, as these can damage the plastic and display. Ensure no liquid enters the unit.
- Connections Check: Annually, or as part of routine system maintenance, inspect all electrical connections to the control unit to ensure they are secure and free from corrosion.
- Probe Inspection: Verify that temperature probes are securely in place and their wiring is intact. Damaged probes can lead to inaccurate readings and improper system operation.
- Environmental Conditions: Ensure the control unit operates within its specified environmental conditions (e.g., humidity 20-85% RH, temperature 0-60°C).
Always disconnect power to the refrigeration unit before performing any maintenance or inspection.
7. Troubleshooting
This section provides basic troubleshooting steps for common issues. For complex problems, contact a qualified refrigeration technician.
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank | No power to the unit; loose connection. | Check power supply to the refrigeration unit. Verify all electrical connections to the control unit are secure. |
| Temperature reading is inaccurate or 'P1'/'P2' error | Faulty or disconnected temperature probe. | Inspect probe wiring and connections. Replace the probe if damaged or faulty. |
| Compressor not running | Setpoint not met; high-pressure lockout; faulty compressor; control unit issue. | Check setpoint. Verify system pressures. If other components are fine, consult a technician for control unit diagnosis. |
| Unit constantly defrosting or not defrosting | Defrost sensor issue; parameter settings. | Check defrost probe. Verify defrost parameters (requires advanced access). |
If the problem persists after attempting these solutions, it is recommended to contact a certified refrigeration technician or the product manufacturer for further assistance.
8. Warranty and Support
This Norlake 139799S Programmed Dixell Control XR70 is an OEM replacement part. For specific warranty information, please refer to the original purchase documentation or contact your supplier. Warranty terms typically cover manufacturing defects under normal operating conditions.
For technical support, replacement parts, or service inquiries, please contact your authorized Norlake distributor or the seller from whom the product was purchased. Provide your model number (XR70) and part number (139799S) when seeking support to ensure accurate assistance.