> ## Documentation Index
> Fetch the complete documentation index at: https://docs.voltic.one/llms.txt
> Use this file to discover all available pages before exploring further.

# Standalone FrostLine Operation

> Configure and use the Voltic FrostLine thermostat in homes with a VolticHub or a Tuya Zigbee Hub.

FrostLine can operate locally from the thermostat or remotely through a VolticHub or a Tuya-compatible Zigbee Hub. The interface, menu names, and available features may vary by Hub and firmware.

## Initial setup

<Steps>
  <Step title="Check the wiring and power the device">
    Verify that the diagram matches your installation and that protections are in place. Power-up must be performed by a qualified electrician.
  </Step>

  <Step title="Pair FrostLine with the selected Hub">
    Add the device from the Voltic platform or Tuya Smart / Smart Life, depending on the installed Hub. Follow that Hub's inclusion procedure.
  </Step>

  <Step title="Select the HVAC scenario">
    Configure the installation type (2-pipe, 4-pipe, or fan coil with underfloor heating) only if it is available for your version and matches the validated diagram.
  </Step>

  <Step title="Set the temperature and fan control">
    Set heating or cooling, the temperature setpoint, and fan speed. For 4-pipe or combined installations, also check each circuit's priorities.
  </Step>

  <Step title="Test each output">
    Test the valve, V1/V2/V3 fan speeds, and, where present, the underfloor actuator separately. Do not approve the installation just because the display turns on.
  </Step>
</Steps>

## Scenario behavior

| Installation                           | What to verify                                                                            |
| -------------------------------------- | ----------------------------------------------------------------------------------------- |
| 2-pipe fan coil                        | Heating/cooling changeover, valve opening, and V1/V2/V3 response.                         |
| 4-pipe fan coil                        | Independent heating and cooling selection, both valves, and the project-defined priority. |
| Fan coil + hydronic underfloor heating | Fan-coil demand, underfloor-actuator demand, and the agreed priority or sequence.         |

The actual sequence depends on the approved diagram; check [the compatibility matrix](/en/frostline/compatibility) before changing it.

## Daily use

* Change the setpoint from the thermostat or the Hub app.
* Select heating or cooling according to the season and installation configuration.
* Adjust fan speed when supported by your model.
* Use schedules or Hub automations when they are available for your model.
* Allow the measured temperature to stabilize before changing several setpoints in succession.

## If something does not work

1. Check that FrostLine appears connected on the selected platform.
2. Verify that the Hub is online and the device is not paired to another account.
3. Review terminal mapping and each load's voltage without energizing the circuit during inspection.
4. Test one output at a time and record the result.
5. Contact [Voltic support](/en/support/contact) with the device reference, firmware, Hub, and installation diagram.


## Related topics

- [Install the Voltic FrostLine](/en/installation/voltic-frostline.md)
- [Voltic FrostLine](/en/frostline/index.md)
- [Frequently Asked Questions About the Voltic System](/en/support/faq.md)