SkyView System Installation Guide - Dynon Avionics

SV-EMS-220/221 Installation and ConfigurationConsult the specific engine’s manual for proper EGT locations.Rotax 912 (except 912 iS) EnginesFor carbureted Rotax 912 engines, only two of the four cylinders are typically monitored forEGT. Unlike the CHT probes which are mounted on diagonal cylinders, the EGT probes shouldbe mounted on the two rear cylinders’ exhaust manifolds. It is critical that the EGT probes bemounted to parallel cylinders’ exhaust manifolds for proper temperature comparison.Most Other EnginesOnce you have determined the appropriate EGT locations for your engine, drill 1/8” diameterholes at the specified positions in the exhaust manifold. Usually, this spot is 2 to 8 inches(50mm to 200 mm) from the cylinder. This spot should be on a straight portion of the exhaustmanifold, as this provides a better fit for the hose clamps. For best results, mount all probes thesame distance from each cylinder.Make sure the hole is placed to ensure that the probe does not interfere with the cowlor spark plug. Also, when making holes, keep in mind that the probe could inhibit theability to perform routine maintenance if placed incorrectly.Place probe in exhaust manifold, and secure it by tightening the clamp with a flatheadscrewdriver. Make sure the clamp is tight and provides a secure fit, but do not overtightensuch that visible stress is put on the pipe.Now, plug each thermocouple wire into its corresponding wire on the thermocouple harness.Ensure that you match the wire color pairs on the harness to those on the thermocouple. Allthermocouple harnesses supplied by Dynon have each function (e.g., CHT1, EGT1) labeled oneach thermocouple pair.A loose probe could allow exhaust to leak. This can lead to carbon monoxidepoisoning in the cabin and/or a potential fire. Have a knowledgeable mechanicinspect the installation.The probe can come loose during flight, and could potentially come in contactwith rotating engine parts or the propeller. We suggest a safety wire to keep theprobe in place.Cylinder Head Temperature (CHT) ProbesWire length of CHT/EGT harnesses supplied by Dynon is not critical. It is acceptableto cut the thermocouple (brown) wire of the CHT/EGT harness to shorten theappropriate length for your installation. It is recommended to not cut the“armored” portion of the cable near the probe end of the CHT or EGT probes.7-30 SkyView System Installation Guide - Revision O