SkyView System Installation Guide - Dynon Avionics

SV-EMS-220/221 Installation and Configurationensures that, in the event of a sensor failure, fuel leakage rate is minimized, allowing time foran emergency landing.Carbureted engines–Use the 0-30 PSI sensor (Dynon P/N 100411-000). Crimp a standard ¼”female Faston onto one of the ground wires coming from the EMS 37-pin Main Sensor Harnessor another ground source such as a local engine ground. Crimp another ¼” female Faston ontoa general purpose input pin wire. Push the two Fastons onto the two terminals on the fuelpressure sensor. Polarity is not important. If you are converting from a GRT EIS system, youmust disconnect the external resistor pull-up from the fuel pressure output. This will make thesensor output equivalent to the sensor supplied by Dynon Avionics.Injected engines–Use the 0-80 PSI sensor (Dynon P/N 100411-001). Crimp a standard #8 ringterminal onto the SV-EMS-220/221 general purpose input wire of your choice. Unscrew thestud cap from the threaded stud. Place the ring terminal on the stud and secure the cap downsandwiching the ring terminal. If the connection between the sensor and your engine is nonmetallic,you must connect the sensor case to ground through other means. The best way toaccomplish this is by sandwiching a ground-connected ring terminal between the sensor andthe mating fitting.Due to vibration issues, never connect the sensor directly to the engine.If you use Teflon tape or other seal, ensure the sensor casing still maintains a goodconnection to ground.Rotax 914 Differential Fuel Pressure SensorThe fuel pressure sensors that Dynon Avionics sells are not suitable for use with theRotax 914 engine, as Rotax specifies that fuel pressure on the 914 engine bemeasured with respect to the air box pressure. All fuel pressure sensors sold byDynon Avionics are only capable of measuring fuel pressure against ambient airpressure.The UMA N1EU007D sensor is a third-party differential pressure sensor which measures fuelpressure with respect to air box pressure as required by the 914 engine. This sensor is notsupplied by Dynon Avionics, but it is supported by SkyView.Install the differential fuel pressure sender in an area convenient to the connections on theengine. The mounting threads are 5/8-18. Connect side of sender marked with a “W” to the fuelline close to the carburetors. Use 1/8-27 pipe thread fitting. Connect the other side of sender tothe air box. This can be done by inserting a “T” in the carb vent lines that go to the air box. Usea 1/8-27 pipe thread, barbed insert into the sender. Make sure all fittings on the air box linesare tight using spring clamps or tie wraps.SkyView System Installation Guide - Revision O 7-39