OpenTherm WFSTAT Manual

App / WiFi GUIDE
The OPTIMUM VIBE - Model WFSTAT incorporates both radio frequency and WiFi connectivity.
The control set - when configured for T.P.I. control - meets the UK Government BEIS Department's criteria for Class IV
control, contributing 2% to the energy efficiency of the system. If your heating appliance is Open Therm® compatible, the
receiver's Open Therm connections can be used. Open Therm control will enable flame modulation, and this is classified as
a Class VI control, contributing 4% to system efficiency. You do not need to configure Open Therm function; connection to
the Open Therm terminals in the receiver will automatically initiate Open Therm operation.
The transmitter is battery-powered (2 x AAA alkaline); the receiver is mains-powered, with volt-free switching and optional
Open Therm® output.
The control set uses the license - free 868 MHz radio band to communicate between transmitter and receiver. The receiver
incorporates both 868MHz RF and 2.4GHz WiFi communications. The Optimum Connect C-Home App (or the Tuya Smart
App) will allow control of the thermostat and receiver wherever you are, from your smart phone via your WiFi router.
Install the C-Home App on your iOS or Android mobile
phone - scan the QR code for your device below, or
search C-Home on the iOS App or Google Play Store
C-Home
Load the App and follow the instructions to create your user account.
Before adding the thermostat in the App, make sure that you first connect the receiver via ON/OFF or Open Therm termi-
nals, and power-up the receiver. Then add the device as noted below. It will load as an ON/OFF or Open Therm controller
accordingly. If necessary, delete the device from the App, connect the receiver as described, then add the device in the
App once more. The receiver must first be connected as intended, for the App to load the correct functionality.
Once the App is installed on your smart phone you can add the VIBE - WFSTAT. If you have a dual-band WiFi router,
make sure that your phone is connected to the 2.4GHz network. You may have to separate the 2.4 GHz and 5 GHz
networks in the home page of your router to do so, as smart phones will often connect to
the 5GHz network by default.
In the App home screen touch the + icon (top RH corner) to add a device.
Select 'Small Home Appliances' in the left-hand column
Select 'Thermostat' from the list of devices; you may have to scroll down to find the
Thermostat icon—see the partial screenshot here
Re-enter your router password (if prompted) .
Press and hold the receiver manual button until the Red Heating on LED flashes rapidly *.
Release the button (the LED should continue flashing rapidly)
On the App, press 'Confirm' - the App will load the device. The LED will stop flashing.
The WFSTAT will display in the App Home Screen with the icon as shown here.
* Notes on LED function:
The Red 'Heating on' LED is ON or OFF indicating the output state. It flashes quickly when in Wifi or RF configuration
mode. It flashes slowly if WiFi is offline or RF communication has failed.
The Green 'Power' LED is ON when connected to an Open Therm appliance, and ON - but flashes once
per second - when connected to a regular ON/OFF boiler via the receiver's volt-free terminals.
- WFSTAT
OPTIMUM VIBE WiFi PROGRAMMABLE THERMOSTAT
Transmitter
Receiver
The Tuya Smart App can also be used to control
your Optimum Connect devices.