Description
The OP‑WFSTAT is a compact, battery‑powered room thermostat that combines local radio control with direct Wi‑Fi connectivity so you can run a simple scheduled programme from the wall or control the heating remotely through a smartphone app. It is sold as a paired system: a touch‑screen transmitter (the room stat) and a small mains‑powered receiver that is intended to be mounted adjacent to the boiler. The design is aimed at domestic and light‑commercial single‑zone heating systems where a wireless room stat and basic app control are useful without the cost or complexity of a full smart hub.
Key specifications
- Tx (room stat) dimensions: 120 × 85 × 22.5 mm; Rx (receiver) approx. 85 × 85 × 25 mm.
- Power: Tx uses 2 × AAA alkaline; Rx mains 230 V AC, 50 Hz.
- Outputs: volt‑free relay switching (10 A resistive @ 230 V) plus OpenTherm terminals with auto‑recognition.
- Communications: 868 MHz licence‑free RF link (pre‑paired) and 2.4 GHz Wi‑Fi for app control.
- Scheduling: four adjustable temperature periods per 24 hours; weekday/weekend grouping supported.
How it works and who it suits
The user interface is deliberately simple: the transmitter has a large blue backlit touchscreen with on‑screen up/down controls and an easy programme profile that you can customise into four periods per day. The receiver translates the wireless commands into a conventional boiler demand — either a simple volt‑free contact that closes to call for heat or, where the boiler supports it, an OpenTherm connection for modulation. That means the product will appeal to households that want a sensible step from a mechanical stat to a remotely accessible programmable stat without committing to a bigger, subscription‑driven smart ecosystem.
Controls, modes and everyday use
On the transmitter you set a weekly schedule (5+2 grouping) or use manual override when required. Temperature regulation modes are selectable: traditional ON/OFF, an Optimising mode (often called “optimum start”) and T.P.I. (time‑proportional/integral) for finer control on systems that respond better to short cycling. There’s also a frost‑protection setting (adjustable between about 5°C and 15°C). When linked to the Smart Life app you get remote on/off, scheduling and the ability to trigger temporary boosts or holiday mode via your phone, provided the transmitter is connected to your 2.4 GHz home Wi‑Fi network.
Installation and compatibility notes
The receiver is intended to be sited close to the boiler and must be wired into a 230 V AC supply; the device provides volt‑free switching to the boiler (COM / NO terminals) and separate OpenTherm terminals where modulation is required. The receiver includes LEDs to show power and load state and a manual override push‑button for on‑site control. OpenTherm is supported and the receiver attempts auto‑recognition, but OpenTherm only functions if your boiler supports the OpenTherm protocol and is wired correctly — installers should check the boiler manual and the stat’s wiring diagram before choosing OpenTherm over simple relay switching. The receiver’s load rating is 10 A resistive, so it is suitable for direct control of most domestic boilers but not for switching high‑current loads without an appropriate relay or contactor.
Practical advantages and limitations
- Advantages: straightforward touchscreen plus app control gives a good balance between local simplicity and remote convenience; OpenTherm support allows modulating boilers to operate more efficiently when supported; factory pre‑linking of RF reduces commissioning time for the wireless link.
- Limitations: the thermostat only works on 2.4 GHz Wi‑Fi (not 5 GHz), the receiver needs a 230 V supply and correct wiring, and some advanced app features depend on using the Smart Life app and keeping firmware/current vendor support up to date. The resistive load limit is 10 A — for larger loads you will need an intermediate relay.
For installers: follow the wiring diagram in the installation instructions carefully (do not wire the volt‑free relay into mains L/N), take earthing and isolation precautions before working on the boiler wiring, and verify whether OpenTherm is the correct choice for the installed boiler. The product’s simple pairing and on‑device manual override make it an easy replacement for older mechanical stats and many battery‑powered wireless thermostats, and it will usually be installed in a single‑zone configuration rather than as part of a multi‑zone controller system.
Overall, the OP‑WFSTAT is a practical, budget‑minded Wi‑Fi + RF thermostat for anyone who wants basic remote control, straightforward weekly programming and optional boiler modulation where supported. It isn’t a full home‑automation hub, but it covers the typical needs of single‑zone home heating with sensible installer features such as OpenTherm terminals and volt‑free switching for compatibility with a wide range of boilers.
(Product and technical details confirmed from the manufacturer/distributor specification and installation documentation.)
