VAL Avionics NAV 2000 Przewodnik Instalacji Pobierz pdf (Strona 143)

SV-EMS-220/221 Installation and Configuration

SkyView System Installation Guide - Revision R 7-35

Rotax 914

The 914 uses threaded EGT probes that screw into bosses provided on the 914-specific exhaust

manifold. Two probes that should work are the Westach 712-4D6K and UMA 2B30. These

sensors are not available from Dynon Avionics.

Most Other Engines

Once you have determined the appropriate EGT locations for your engine, drill 1/8” diameter

holes 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 exhaust

manifold, as this provides a better fit for the hose clamps. For best results, mount all probes the

same distance from each cylinder.

 Make sure the hole is placed to ensure that the probe does not interfere with the cowl or

spark plug. Also, when making holes, keep in mind that the probe could inhibit the ability to

perform routine maintenance if placed incorrectly.

 Place probe in exhaust manifold, and secure it by tightening the clamp with a flathead

screwdriver. Make sure the clamp is tight and provides a secure fit, but do not over-tighten

such 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. All

thermocouple harnesses supplied by Dynon have each function (e.g., CHT1, EGT1) labeled on

each thermocouple pair.

A loose probe could allow exhaust to leak. This can lead to carbon monoxide

poisoning in the cabin and/or a potential fire. Have a knowledgeable mechanic

inspect the installation.

The probe can come loose during flight, and could potentially come in contact

with rotating engine parts or the propeller. We suggest a safety wire to keep the

probe in place.

Cylinder Head Temperature (CHT) Probes

Wire length of CHT/EGT harnesses supplied by Dynon is not critical. It is acceptable

to cut the thermocouple (brown) wire of the CHT/EGT harness to shorten the

appropriate 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.

CHT wire may be extended as well, provided that:

1) Type J thermocouple is used for the extension wire. (this is different than EGT

wire)

2) There is no temperature change across the connection between the junction

that is created. For example, do not create a junction across the firewall.

If either of the above guidelines are not followed, your CHT readings will be

1 2 ... 138 139 140 141 142 143 144 145 146 147 148 ... 400 401

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VAL Avionics NAV 2000 Przewodnik Instalacji Strona 143