Dynon Avionics SkyView System Installation Guide - Manual (Page 157)

SV-EMS-220/221 Installation and Configuration
SkyView System Installation Guide – Revision S 7-45
must not be installed directly to the engine due to potential vibration problems. Next, connect
the fuel sensor to the engine using appropriate hoses and fittings. Its pressure port has a 1/8-27
NPT pipe thread fitting; you may need adapters to
connect to the pressure port on your engine. Locate the
correct fuel pressure port for your engine. This port
must have a pressure fitting with a restrictor hole in it.
This restrictor hole ensures that, in the event of a
sensor failure, fuel leakage rate is minimized, allowing
time for an 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 Harness or another ground source such as a local
engine ground. Crimp another ¼” female Faston onto a general purpose input pin wire. Push
the two Fastons onto the two terminals on the fuel pressure sensor. Polarity is not important. If
you are converting from a GRT EIS system, you must disconnect the external resistor pull-up
from the fuel pressure output. This will make the sensor 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 ring
terminal onto the SV-EMS-220/221 general purpose input wire of your choice. Unscrew the
stud cap from the threaded stud. Place the ring terminal on the stud and secure the cap down
sandwiching the ring terminal. If the connection between the sensor and your engine is non-
metallic, you must connect the sensor case to ground through other means. The best way to
accomplish this is by sandwiching a ground-connected ring terminal between the sensor and
the mating fitting.
Due to vibration issues, never connect the sensor directly to the engine.
For Dynon Avionics P/N 100411-000 and P/N 100411-001 pressure sensors, if
Teflon tape or other sealant is used, ensure the sensor casing still maintains a
good connection to ground.
Rotax 914 Differential Fuel Pressure Sensor
The fuel pressure sensors that Dynon Avionics sells are not suitable for use with
the Rotax 914 engine, as Rotax specifies that fuel pressure on the 914 engine be
measured with respect to the air box pressure. All fuel pressure sensors sold by
Dynon Avionics are only capable of measuring fuel pressure against ambient air
pressure.
1/8-27 NPT
0-30 PSI
1/8-27 NPT
0-80 PSI
Figure 40 – Example Fuel
Pressure Sensors