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Old 06-09-2008, 08:02 AM   #29
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Fred, I'm curious does your coach have any mounting holes that might have been used by a 2nd transfer switch? The holes would be under the passenger side closet in the compartment with the pull down door. Ours is bolted to the top of the fender towards the front of the coach.

Did the one generator lead ONLY feed the univolt or did it feed the rest of the coach as well?

When I get home this weekend I'll try and remember to take a couple of pictures and post them.

Glad you got something worked out!

Brad
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Old 06-10-2008, 10:38 PM   #30
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The missing box

Quote,
"Fred, I'm curious does your coach have any mounting holes that might have been used by a 2nd transfer switch?

Did the one generator lead ONLY feed the Univolt or did it feed the rest of the coach as well?"



Brad, I've looked high and low for any sign of a second box, or any sign that a second box had even been there. I've looked in the location under the closet where your's is and found nothing, not even a screw hole where it might have been. The second lead from the generator did feed the rest of the coach as well as the Univolt system
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Old 06-11-2008, 07:22 AM   #31
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1989 34.5' Airstream 345
boca raton , Florida
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missing electric box

If your coach is at all wired the same as my 89 345LE, look in the gen compartment. Both the 30 and 20 amp leads go to a 4x4 junction box on the right side of the compartment. The power solution system I installed gives you all the directions as to how to tap into the box with changes and an additional box on top of the existing. Basically the modifications allow you to use the 20 amp gen circut and add a additional shore power cord when docked. I have been using mine for a couple of years without any problems.
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Old 06-28-2008, 09:20 PM   #32
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Fred,

Just to show I wasn't making up the the transfer switch and circuit breaker on our 84 310, here are some pictures to prove it

Its a real mystery to me why Airstream would use two different (at least two) wiring schemes on the same year and model motorhome

30 amp Circuit Breaker box.
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Rear A/C transfer switch.
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Rear A/C wiring under passenger side closet.
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Glad you got your system sorted out. If you're like me its one more item you can cross off your to-do list

Brad
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Old 07-02-2008, 07:10 PM   #33
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Dual AC

Gentlemen: I have been reading this with some interest. Of course, our 350 is wired differently than anything mentioned here, in that only the REAR AC works when plugged in to shore power. Running both AC in the 350, if I read the AS manual that came with the vehicle correctly, appears to require running the generator. I do not remember anything in the manual about both AC actually running off the generator when it is running--but I suppose that this is quite possible for a 7K watt generator.

Is there a work-around to allow running both AC off shore power without the use of an additional 20 amp power cord? (pluging into 2 discrete shore power recepticles?) Does the running of both AC units at the same time (although not started at the same time) on the same shore power circuit require 50 amps?

We spend a goodly amount of time on weekends in places where only 30 amp service is available, and additional 20 amp circuits are not. I like using the genny only for emergencies, not routine use.

It's late, I'm tired, and I'm probably missing something--somebody please straighten me out!!

Best to all,

R
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Old 07-02-2008, 10:36 PM   #34
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our 345

The genny will run both the front and rear AC; when on shore power with NO modifications you can only chose to run one option: microwave, nutone, front air, rear air, etc. on our 85 345.
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Old 07-16-2009, 10:53 PM   #35
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Idiot Proof

I wanted the same, but must be cheap, simple, idiot proof.

A 12ga. extension cord was added directlt to the AC power supply point.
The cord runs down the wall behind the acordian door, then into the rear storage box.
The cord stays in box until needed, then is run out and under to 20 amp power supply.
A double throw/double posistion switch is installed at power supply point too.
This totaly isolates AC from either Generator/30amp switch above stove, and the 20amp power cord.
Never can power come from both directions, and never any feed back to the generator.

A = Center connecters are power supply out to the AC
C = 12ga extension cord (red)
G = Power from generator or 30 amp with switch over stove set to rear AC




To locate switch center











Of course after all this work, I find a nice hole alread in place on the shroud.
The shroud was painted white while it was down.
Krylon plastic does good, but so many colors, white seems dull.
Forward is Gen
Rear is cord



Tested in very hot Florida during the 4th.
I let both run all day and night.
Camera would fog up when taken outside.
And sleeping under blankets was nice.

A nice extra is that if one breaker trips while I am away, the other is a kinda back-up.

Plus now I can use microwave and keep the rear AC going.
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Old 07-16-2009, 11:38 PM   #36
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Don't panic...the DPDT switch is rated at 20amps 120volts.
(with a center 'off' position, is that a triple throw?)

Left this out...
If your diffusers don't stay put...a small O-ring on the end of one side works great.

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Old 05-07-2015, 01:12 PM   #37
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Question Power Solutions?

This is a great thread, but I know it's a little on the stale side. I figured this question was worth a try, though.

I called Power Solutions to see if they still sold that kit, but the phone was disconnected. Does anyone happen to know if they became another company and are still selling it? Or whether anyone else is selling it?

I suspect this will be harder to find as 30 amp rigs are less common (aren't they?), but I still have this 1986 345 moho and I am still hoping to run both a/cs on shore power!

Thanks!
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Old 05-07-2015, 01:58 PM   #38
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Jenni,

There are a lot of threads on Airforums discussing the various methods for upgrading to allow the rear air to run at the same time as the front when on shore power.

As mentioned above I did it to the 310. Are you planning on doing the work yourself or having someone else do it?

Brad
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Old 05-07-2015, 02:22 PM   #39
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running two a/cs threads

Hi Brad,

I was planning on having a mechanic or technician do it.

I just found this thread, from someone's recommendation on a thread I started, lamely. I'm slammed at work, so I just went with this one.

What were you thinking about it?

Thanks,
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Old 05-07-2015, 02:38 PM   #40
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There are a variety of ways to tackle the problem. The easiest (to me anyway!) is the way I did it on the 310.

Below is the thread with the sketches I made.

310 Rear AC mod

The only thing I changed was instead of using a 3-prong plug I actually installed a double pole 30-amp switch. When the switch is one direction a new shore power cord is tied to the rear AC. When it's switched the other direction the rear AC power comes from the generator or the selector switch up in the kitchen area as originally set up from the factory.

From what I remember about the 345 wiring it shouldn't be any more difficult than the 310 was.

Take a look at the sketches I attached in the linked thread and let me know what you think.

Brad
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Old 05-07-2015, 02:43 PM   #41
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two plugs for shore power

Hey Brad,

this looks great. I did see that you had a fix. My problem with the 345 is that I'm already using 30 amp plug for the shore power post and would need a second 20 am plug, I guess a heavy 3-prong extension cord, for what you often find in campgrounds, that second standard outlet alongside a 30 amp outlet. But otherwise, the idea is the same, from what i can tell. But I really haven't had time to examine your post carefully yet because of many other pressures.

Thanks! I'll post what I end up doing!
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Old 05-08-2015, 06:53 AM   #42
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Jenniflow,

It's been a long time since posting, but the power solutions I purchased from went out of business a long time ago. The system was easy to install. Have not had my 345 for a couple of years (moved to a 45" Prevost). I believe about 10 or so years ago I posted the full manual, needed parts list and how to wire from Power solutions (With their permission as they had closed their business. Check my old posts and it might have been put in the sticky thread. I no longer have the paper work but will look if I still have the files that I scanned. If I do will forward them to you.
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