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Question on Z-14 System

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Rocketman1988

Joined: 21 Jun 2012
Posts: 63

Posted: Tue Jun 12, 2018 8:04 am Post subject: Question on Z-14 System

I am planning on the Z-14 system in my RV-10.  I have dual alternators, dual batteries, electronic ignition, and electronic fuel injection (Dual EFII System).



Looking at the schematic, it appears that ECU 1 / Fuel Pump 1 would be on the main battery bus and ECU 2 / Fuel Pump 2 would be on the aux battery bus.



This arrangement means power is always available to those items, even when the battery masters are OFF. 



I am planning on fuel pump ON/OFF switches and could also switch the individual ECU power lines.  



Anyone (maybe Bob?) care to weigh in on this arrangement? 



Thanks!

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Robert Reed

Joined: 22 Oct 2009
Posts: 331
Location: Dallas/Ft.Worth

Posted: Tue Jun 12, 2018 10:19 am Post subject: Question on Z-14 System

I am using the same configuration with each of the two power buses on guarded switches and powering only the ECI and Fuel Pumps.  My original configuration was using the FADEC system but have replaced with the Dual FlyEfii system.

Bob Reed

      From: Rocketman1988 <Rocketman(at)etczone.com>

 To: aeroelectric-list(at)matronics.com 

 Sent: Tuesday, June 12, 2018 11:05 AM

 Subject: Question on Z-14 System

I am planning on the Z-14 system in my RV-10.  I have dual alternators, dual batteries, electronic ignition, and electronic fuel injection (Dual EFII System).

Looking at the schematic, it appears that ECU 1 / Fuel Pump 1 would be on the main battery bus and ECU 2 / Fuel Pump 2 would be on the aux battery bus

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nuckolls.bob(at)aeroelect
Guest

Posted: Tue Jun 12, 2018 10:36 am Post subject: Question on Z-14 System

At 11:04 AM 6/12/2018, you wrote:

  	  Quote: 	
		  --> AeroElectric-List message posted by: "Rocketman1988" <Rocketman(at)etczone.com>



 I am planning on the Z-14 system in my RV-10.  I have dual alternators, dual batteries, electronic ignition, and electronic fuel injection (Dual EFII System).



 Looking at the schematic, it appears that ECU 1 / Fuel Pump 1 would be on the main battery bus and ECU 2 / Fuel Pump 2 would be on the aux battery bus.



 This arrangement means power is always available to those items, even when the battery masters are OFF. 



 I am planning on fuel pump ON/OFF switches and could also switch the individual ECU power lines.  



 Anyone (maybe Bob?) care to weigh in on this arrangement? 	


   That's the idea. Electrically dependent engine

   accessories driven from battery busses are avaiable

   even when the electrical system(s) are shut down . . .

   as in case of smoke in the cockpit. The only

   operational concerns to explore are potential

   difficulties if BOTH primary and secondary

   accessories are energized at the same time.



   Had a Z-14 builder some years back with dual

   ECU's sthat would argue with each other if

   energized at the same time. We arranged for a

   little lockout mechanism that prevented a

   BOTH on at the same time. There was no hazard

   for having other dual accessories energized

   at the same time.



   We machined the lock out of a piece of 1/2"

   aluminum. It mounted between the two ECU

   switches on a single screw.



 

 

   Bob . . .

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