EPH CP4 (COMBIPACK4) - OpenTherm Programmable RF Thermostat v2

The EPH CP4V2 is a wireless, programmable, and OpenTherm-compatible room thermostat and receiver kit. It is the updated version of the popular CP4 thermostat.

Here's a breakdown of its key features and purpose:

• Wireless (RF - Radio Frequency): The kit consists of two main parts: a thermostat unit that you place in a room and a separate receiver unit that is wired to your boiler. They communicate wirelessly, which allows you to place the thermostat in the most optimal location for temperature sensing without being restricted by wiring.

• Programmable: It allows you to set specific time and temperature schedules for your home's heating. You can typically choose between 7-day, 5/2-day, or 24-hour programming with up to six different time and temperature settings per day. This helps to save energy by only heating your home when you need it.

• OpenTherm Compatibility: This is a significant feature. OpenTherm is a communication protocol that allows the thermostat and the boiler to "talk" to each other. Instead of simply turning the boiler on or off, an OpenTherm thermostat can tell the boiler exactly how much heat is needed. This allows the boiler to modulate its heat output, making it much more efficient and helping to maintain a more stable room temperature.

• "Boiler Plus" Compliant: The CP4V2 meets the UK's "Boiler Plus" regulations, which require certain new boiler installations to include a modern heating control.

• Key Features:

  • 30-minute Boost Function: A quick and easy way to turn on the heat for a short period outside of the set schedule.

  • Large Backlit LCD Screen: Provides a clear display for easy reading and programming.

  • Holiday Mode: Allows you to set a lower temperature for a specific duration to save energy while you are away.

  • Frost Protection: Prevents the temperature from dropping to a level that could cause pipes to freeze.

  • Receiver: The new version of the receiver is designed to fit a standard 6-pin backplate, making it easier for installers to replace older controls.

• Upgrade to Smart Control: The system can be upgraded to a "smart" thermostat with the addition of a separate GW04 gateway device, allowing you to control your heating via a mobile app.