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Wiring RV7 with Z13 diagram (2 alternators, 1 battery)

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carrollswa(at)gmail.com
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Posted: Tue Oct 21, 2014 3:49 pm Post subject: Wiring RV7 with Z13 diagram (2 alternators, 1 battery)

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!





Sorry for any typos, this message was sent via a smartphone.

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fvalarm(at)rapidnet.net
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Posted: Tue Oct 21, 2014 11:35 pm Post subject: Wiring RV7 with Z13 diagram (2 alternators, 1 battery)

I'm assuming Z13/8 since you mention 2  alternators.

  

 Need to know more about...

  

 Your primary flying mission?, ($100 hamburgers, frequent long  cross country, aerobatic, low speed local fun flying, over in hospitable  terrain/open water etc)

  

 Type of EI?  (Pmag, SDS, Lightspeed  etc)

  

 Do you have a mechanical fuel pump in addition to the two  electrics?

  

 Do your EI have their own power backup?

  

 Z13/8 shows specific architecture showing how the busses and  systems are laid out.  Are you changing the basic  architecture?

  

  Will you use fuses, resettable breakers, switched breakers for  the EI and pumps?

  

 That's just a start.

  

 Bevan



  

  

  



   From:  owner-aeroelectric-list-server(at)matronics.com  [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of Clark  Carroll

Sent: Tuesday, October 21, 2014 4:47 PM

To:  aeroelectric-list(at)matronics.com

Subject: Wiring RV7  with Z13 diagram (2 alternators, 1 battery)

 

 



 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!

 



 



Sorry for any  typos, this message was sent via a smartphone.�~�   [quote][b]

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user9253

Joined: 28 Mar 2008
Posts: 1908
Location: Riley TWP Michigan

Posted: Wed Oct 22, 2014 3:37 am Post subject: Re: Wiring RV7 with Z13 diagram (2 alternators, 1 battery)

Both fuel pumps should NOT be controlled by one switch because that switch will eventually fail.  How about two separate switches with a mechanical interlock so that only one switch can be turned on at a time?  Is this a fuel injected system with high pressure fuel pumps?  Can the fuel pressure regulator handle the flow from two pumps?  When designing the electrical system, ask what will happen if this connection fails?  Then either have a backup plan or make sure the connection is highly unlikely to ever fail.

Joe

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Joe Gores

carrollcw

Joined: 22 Oct 2014
Posts: 8
Location: Friendswood, TX

Posted: Thu Oct 23, 2014 5:54 am Post subject: Re: Wiring RV7 with Z13 diagram (2 alternators, 1 battery)

For now, I just want to get it in the air for day/vfr/acro only.  However, I will later make it fully night IFR.  



I am running the dual EFII ignition and fuel injection.  Although I will have a mechanical pump, at least one electric pump must be running to sepply sufficient pressure.



EI does not have its own power backup.  After speaking with Robert at EFII, I am planning on wiring the 2 ECU's, 2 Ignitions, and 2 Fuel pumps to the always hot battery bus with switches for each of them, although I was planning on wiring the fuel pumps with a single dual pole switch.



Basic architecture staying the same.  Breakers for e-bus, fuses for everything else.



Thanks for the help!

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jmjones2000(at)mindspring
Guest

Posted: Sat Oct 25, 2014 4:45 pm Post subject: Wiring RV7 with Z13 diagram (2 alternators, 1 battery)

I also have the EFII system with redundant ecus. 



Make sure you talk with Robert about the mechanical fuel pump in the EFII system. The issue I see with placing a mechanical fuel pump in the system would be pressurizing it with an electric fuel pump. The head pressure put out by the EFII pump module can damage the mechanical pump diaphragms. If one or both diaphragms begin to leak, you will loose fuel pressure to your injectors and they will fail to inject fuel into the cylinders, resulting in engine failure. 



If you MUST have the mechanical pump in the system, I would suggest that the fuel from the tanks run thru the mechanical fuel pump first, then thru the EFII electrical fuel pump module.  More plumbing but much safer. I'm sure Robert Paisley will have an opinion as well. 

 

Hope this helps



Justin



 	  Quote: 	
		   On Oct 23, 2014, at 07:54, carrollcw <carrollswa(at)gmail.com> wrote:

 

 

 

 For now, I just want to get it in the air for day/vfr/acro only.  However, I will later make it fully night IFR.  

 

 I am running the dual EFII ignition and fuel injection.  Although I will have a mechanical pump, at least one electric pump must be running to sepply sufficient pressure.

 

 EI does not have its own power backup.  After speaking with Robert at EFII, I am planning on wiring the 2 ECU's, 2 Ignitions, and 2 Fuel pumps to the always hot battery bus with switches for each of them, although I was planning on wiring the fuel pumps with a single dual pole switch.

 

 Basic architecture staying the same.  Breakers for e-bus, fuses for everything else.

 

 Thanks for the help!

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=432174#432174

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