Wiring a Dual EFII system using Aeroelectric Z-13

[carrollcw]

Hey all,

I am preparing to wire my RV7 iaw the Z13 diagram in Aeroelectric. My question is, what busses and switches are you using for the system?

The dual ignition should be wired to 2 single pole ignition switches. Are you putting them both on the main battery bus, the e-bus, or splitting them between the 2 busses?

There are 2 ECU's. My understanding is there is no need to have them switch activated, but are you all switch activating them anyway? What bus are you putting them on? I am thinking that if I put them on the main battery bus, they should be switch activated. However, if I put them on the e-bus, they don't need to be...

There are 2 fuel pumps: a primary pump and a secondary pump. Only 1 should be running at a time. I am thinking of also putting them on the main battery bus with a single dual pole switch (on-off-on). Any other recommendations?

Thanks!

[crabandy]

I have the dual ECU EFII ignition, I wanted the ability to isolate each ignition so I could verify each ignition was working properly during my runup. If one ignition went haywire in the air I want to be able to shut it off. I wired 1 to my main bus and 1 to my EBUS trying to eliminate a single failure point.
Good luck!

[Mark33]

I just used Roberts wiring harness and wired it according to the schematics. I'm also using his bus manager which makes everything very simple and automated. I do gave a fuel pump selector switch but the bus manager automaticity switchers to the backup pump if low fuel pressure is recognized. I also have the duel ECU setup and my wiring harness came with a toggle switch which allows me to switch to each ECU manually if I want to check each one independently. Don't you guys have the same setup as I do?? Or should I have wired mine up differently for a wider safety margin?

[BushCaddyBuilder]

I have the complete EFII setup with Dual ECUs on my Lyc IO-360. I am wiring one ign, one ecu, and one fuel pump to the Main bus, and the other set to the HOT battery buss adjacent to the battery. I will then run the wires through the appropriate circuit breaker, through a Lever Lock Switch, and into the system.

Here is a pic of my diagram and how I intend to use it.

[AK-Models]

[quote=complete EFII setup with Dual Mags on my Lyc IO-360.[/QUOTE]

Did you mean to say double ECU? Could you e-mail actual size image to me?

[mannanj]

I wired my dual ECU's so I could select either the main buss or an aux. battery. I used two single pole-double throw, three position toggle switches. The up position selects the main buss, the center position is "off" and the down position selects the aux battery.

The aux battery will power both CPU's for several hours, at least long enough to get to an airport in case the main buss fails.

The aux battery is charged from the alternator through a big Shottky diode that allows the current to flow in only one direction and prevents the aux battery from trying to power the failed main buss.

Robert OK'd my schematic before I installed the system.

I'm sure that you're going to love your EFII system! I know I do!

[carrollcw]

I ended up wiring them both to the hot battery bus that is backed up by a standby alternator. They are wired via a single pole switch so I can shut them down and not drain the battery. I like the dual pole idea though.

[Sam Staton]

I have wired mine so that one side is powered thought the VPX, and the other directly from the battery through a fuse. Not flying yet, so don't know if that is the best way, but seems to offer some measure of redundancy.

[BushCaddyBuilder]

Originally Posted by AK-Models

Did you mean to say double ECU? Could you e-mail actual size image to me?

I did mean to say Dual ECU. I will email the full size file to you. Check your PM.

[majuro15]

Would it be possible to run the EFII through a VPX Pro and use the VPX page to isolate the ECU's as part of the run up checklist? I'm trying to avoid extra switches on the panel but still want control to ensure both are working.