The EPH CP4D RF Programmable Dial Thermostat is a wireless OpenTherm programmable room thermostat with intuitive dial control, paired with an RF receiver for single-zone boiler control. It combines a large backlit display and handwheel temperature adjustment with Boiler Plus compliant load-compensating control, helping improve comfort and efficiency. Why Buy the EPH CP4D RF Thermostat? Intuitive handwheel dial for quick, precise temperature changes with a clear digital display. OpenTherm modulation and TPI control to reduce boiler cycling and optimise efficiency. Fully programmable RF thermostat with multiple time and temperature periods each day. Boiler Plus compliant control strategy meeting current efficiency regulations. Frost protection, boost and holiday modes for all-season protection and convenience. Pre‑paired thermostat and receiver for straightforward wireless installation. Suitable For Combi and system boilers needing an OpenTherm‑capable wireless programmable stat. Users who prefer dial-based temperature control with modern programmable features. Retrofit upgrades from basic on/off stats to Boiler Plus compliant RF controls. Homes aiming to improve efficiency and comfort with time/temperature zoning on a main circuit. Technical Specifications Specification Details Product Type Wireless programmable dial room thermostat with RF receiver Control Range Approx. 5–35°C adjustable setpoint Control Modes Automatic, manual, off, holiday, boost with TPI and OpenTherm options. Programming Multiple daily time/temperature periods with 24‑hour, 5/2‑day or 7‑day modes. Frost Protection Adjustable frost setting active in off and holiday modes. Thermostat Power Battery powered with AA alkaline cells, low‑battery indication. Receiver Power Mains‑powered RF receiver for boiler switching. Output Contacts Volt‑free contacts suitable for most boilers and OpenTherm terminals. Display Large backlit LCD showing setpoint, room temperature and status. Installation Wall‑mounted thermostat and receiver, portable use possible with stand where supplied. Typical Warranty Extended multi‑year manufacturer warranty (check pack for exact duration).
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