1. Introduction
The Harvia C150 is a digital control unit designed for managing electric sauna heaters in both family and community saunas, supporting heaters with a maximum power output of 17 kW. This unit provides precise control over sauna temperature and operating time, ensuring a safe and enjoyable sauna experience. This manual outlines the essential steps for installation, operation, and maintenance of your Harvia C150 control unit.
2. Package Contents
Upon unpacking, please verify that all components are present and undamaged:
- Harvia C150 Control Unit
- Temperature Sensor with approximately 4 meters of cable
If any items are missing or damaged, please contact your retailer.
3. Setup and Installation
Installation of the Harvia C150 control unit and its components should be performed by a qualified electrician in accordance with local electrical codes and regulations. Incorrect installation can lead to electrical shock or fire hazards.
3.1 Control Unit Placement
The control unit should be mounted in a dry location outside the sauna room, easily accessible for operation. Ensure adequate ventilation around the unit.
Image: Side view of the Harvia C150 Control Unit, illustrating its compact form factor and potential mounting orientation.
3.2 Temperature Sensor Installation
The temperature sensor housing contains both the temperature sensor and a resettable overheat protection circuit. It must be installed inside the sauna room according to the sauna heater manufacturer's instructions, typically on the wall above the heater at a specified distance from the ceiling.
Image: The temperature sensor for the Harvia C150, including its housing and the approximately 4-meter connection cable.
The sensor cable, approximately 4 meters long, connects the sensor to the control unit. Ensure the cable is routed safely and protected from damage or excessive heat.
4. Operating Instructions
The Harvia C150 control unit features a digital display and intuitive controls for setting your desired sauna conditions.
Image: Front panel of the Harvia C150 Control Unit, highlighting the user interface with its digital display and operational controls.
4.1 Powering On/Off
Use the main power switch on the control unit to turn the sauna heater on or off.
4.2 Temperature Setting
The digital display shows the current temperature, up to a maximum of +125 °C. The temperature setting range is from +40 °C to +110 °C, with a setting precision of +/-1 °C. Use the temperature adjustment knob to set your desired sauna temperature.
4.3 Operating Time
The control unit allows you to select the maximum operating time for the heater, ranging from 1 to 12 hours. The factory default setting is 4 hours.
- For family saunas, the maximum operating time is 6 hours.
- For collective (community) saunas, the maximum operating time can be set up to 12 hours.
4.4 Programming Pre-setting
The unit can be programmed to start heating after a delay, from 0 to 12 hours in advance. Refer to the detailed programming instructions in the full installation manual for specific steps.
5. Maintenance
The Harvia C150 control unit is designed for reliable operation with minimal maintenance. To ensure longevity and proper function:
- Keep the control unit clean and free from dust and moisture. Wipe with a dry or slightly damp cloth; do not use abrasive cleaners.
- Periodically inspect the temperature sensor and its cable for any signs of damage.
- Ensure all electrical connections remain secure. Any electrical work should only be performed by a qualified professional.
6. Troubleshooting
The control unit is equipped with diagnostic features to assist in identifying potential issues. If an error occurs, the heater will be switched off, and the control panel will display an error message.
6.1 Error Messages
The control unit may display the following error codes:
- Er1: Indicates a specific fault.
- Er2: Indicates a specific fault.
- Er3: Indicates a specific fault.
These error messages assist in diagnosing the cause of the problem. The error message will disappear once the fault has been repaired. If an error persists after basic troubleshooting, contact a qualified service technician.
6.2 Overheat Protection
The temperature sensor includes a resettable overheat protection. If the sauna temperature exceeds safe limits, this protection will activate, shutting down the heater. Allow the sauna to cool down, then reset the overheat protection as per the full installation instructions.
7. Specifications
| Feature | Specification |
|---|---|
| Model Number | C150400 |
| Brand | Harvia |
| Max. Heater Power | 17 kW |
| Voltage | 400V 3N |
| Temperature Setting Range | 40 °C to 110 °C |
| Temperature Display Max | 125 °C |
| Operating Time Limit | 1-12 hours (Factory default: 4 hours) |
| Programmable Pre-setting | 0-12 hours |
| Control Unit Dimensions (W x H x D) | 250 mm x 223 mm x 70 mm (approx.) |
| Control Unit Weight | 1.4 kg (for C150) |
| Temperature Sensor Type | NTC thermistor (22 kΩ/T=25 °C) |
| Temperature Sensor Cable Length | Approx. 4 meters |
8. Warranty and Support
For warranty information, please refer to the documentation provided with your purchase or contact your retailer. For technical support or service inquiries, please contact Harvia customer service or an authorized service partner. Always provide your product model (C150) and serial number when seeking support.
