The 24 hour programming time switch cycle performs the same sequence of switching operations on each day and can be quickly and easily set using the small manual levers on the dial. A “day omit” device allows you to select any number of days in the week on which the switching cycle can be disabled. A general purpose timeswitch for heating, ventilation and equipment control applications. FEATURES Programming: 24 hour with either 2 or 3 operationsCurrent Rating: 20AConnection Pins: 3Battery Reserve: 100 hoursDay Omit Dial: Yes (Omits the ‘ON’ operation) SPECIFICATIONS Programming 24 hour programme with 2 (S255.2) or 3 (S255.3) ON/OFF operations per dayDisplay 24 hour dialMounting Surface mountingCurrent Rating SPST: 20amp resistiveSupply 230V, 50/60 Hz a.c.Base Type 3 PinReserve 100hrs (providing battery has been charged for 300 hrs)Day Omission Yes (omits the “ON” operation)Temp Override Facility Advance to “OFF”, when program “ON” and will remain “OFF” unit next(Manual Button) “ON” operation and vice versaCable Size 6.0mm2Timing Accuracy 5 mins/yearPower Consumption 0.6W at 230VAmbient Temperature Range Designed to operate over a temperature range of 0°C to 50°C continuousLive Parts Protection This timer is totally protected by its enclosureDirt Protection Normal domestic dust deposits onlyMoisture Protection Ordinary: has no special protection against moistureShock Protection Class 1 (Product must be earthed)Dial Calibration 15 min divisionsSetting Accuracy +/- 3 minutesConforms to BS EN60730Dimensions Height (wall mounted) 136mm, width 105.7mm, projection 82mm, (Total height 146.5mm) WIRING 1 – Live In (Clock & Load)2 – Neutrals3 – Live Out (Load)Earth Posn – Earth DOWNLOADS Q554 Datasheet [PDF] RPTS Standard Instructions [PDF]
