Seat Ventilation Harness

[SkyDweller]

Hi All, first time posting for help, hope I’m in the right place!

I purchased a RV-9A earlier this year (first plane had to be an RV!). It came with 6 ventilation fans built into each seat, though they are not hooked up. I was provided two harnesses by the owner.

There three wires which need to be connected to the airplane for these fans to function. Red and black, which are pretty self explanatory, but each harness also has a blue wire. Each harness has a single switch and 3 different fans speeds so I imagine this blue wire has something to do with this feature. Any guidance would be greatly appreciated!

 

[bjdecker]

Found this via Google Lens --- see pic.

 

[kirkbauer]

I'm curious how effective the ventilation is as I have never been in an airplane with ventilated seats.

 

[SkyDweller]

Found this via Google Lens --- see pic.

View attachment 69450

Thanks for the reply. Does this possibly suggest that the blue wire is not needed? Sounds like I need to run to the hangar and check to see which pins are wired to that connector (if it’s the same one I have)

 

[SkyDweller]

I'm curious how effective the ventilation is as I have never been in an airplane with ventilated seats.

Hopefully one day soon I can report back! Doubt it’ll be as good as air conditioned seats in modern cars, but it’s to be worth something. Here in FL I’ll take anything even if it’s just a puff of air.

 

[DeltaRomeo]

You're in the right place <g>. Welcome and thanks for reaching out.
v/r,dr

 

[BH1166]

Contact Lemke, looks like their kit, includes 6 fans.

Lemke Autosattlerei & Möbelpolsterei - Qualtiät nach Maß

Wir reparieren, restaurieren und erstellen Polster und Bezüge für Fahrzeuge, Experimental- Flugzeuge oder Polstermöbel. Wir stehen für Qualität und Kreativität.

www.lemke-polsterei.com

My guess blue is signal eg: speed selection, red and black / power ground, blue speed via the speed controller, the small box , pic#3

 

[SkyDweller]

Contact Lemke, looks like their kit, includes 6 fans.

Lemke Autosattlerei & Möbelpolsterei - Qualtiät nach Maß

Wir reparieren, restaurieren und erstellen Polster und Bezüge für Fahrzeuge, Experimental- Flugzeuge oder Polstermöbel. Wir stehen für Qualität und Kreativität.

www.lemke-polsterei.com

My guess blue is signal eg: speed selection, red and black / power ground, blue speed via the speed controller, the small box , pic#3

It is actually a Lemke kit, good eye! I found the invoice for the interior in with the harnesses. I tried calling them, but they’re out of office until September 10th. What would you connect the blue wire to, a power source along with the red lead?

 

[Mike S]

What would you connect the blue wire to, a power source along with the red lead?

Until I was sure of the blue wire function, I would not connect it to anything.

 

[Derek.plough]

If I remember correctly, red is always hot and blue is switched for the relay.

 

[BH1166]

Here you go….a good company to do business with like many favored by RVer’s
Enjoy your RV !

 

[SkyDweller]

Here you go….a good company to do business with like many favored by RVer’s
Enjoy your RV !

View attachment 69490

This forum is incredible. Thank you sir! Any idea how many amps these fans pull? I have power right underneath my panel on the pilot side. I don’t have seat heaters, but assume the direction is still applicable.

 

[Mich48041]

Mike S gave the best reply. "Until I was sure of the blue wire function, I would not connect it to anything."
What if that blue wire outputs a 5 volt signal? Connecting 12 volts could damage something.

 

[SkyDweller]

Officially resolved. I wanted to confirm with Lemke because I do not have seat heaters and it was mentioned in the email/screenshot provided here yesterday.

Thank you, @BH1166 and I apologize you did respond to another thread where I asked this same question which I forgot about. Your input was accurate then, but didn’t quite confirm how I should wire it.

Thanks all for the guidance!

 

[SkyDweller]

Just to leave some final results info for the forum. Everything was wired successfully. However, when pressure is applied to the seat you can hear the fans binding or hitting material. When enough pressure is applied (just with my hand) the fans sound as though they even come to a complete stop.

I don’t like the idea of power being supplied to a fan which may be unable to spin or meeting resistance. Sounds like a good way to overheat the fan motors to me.

If you do have the ventilated seat option from Lemke, have you experienced any noise coming from these fans when sitting in the seat or applying pressure to them.

Leaning more toward just pulling the system back out altogether. Fortunately I made a mount for the fan buttons rather than drilling them into my panel.