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Old 06-15-2012, 06:21 PM   #1
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Angry 110V Switchover Box

Hello you all,
I am paying a $100 hr for the mechanic to locate my generator/Shore Switchover box. Anybody know where it is located on a 26 or 30 ft Landyacht???
Thanks
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Old 06-15-2012, 08:06 PM   #2
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WOW, $100 an hour is a little rude just to look for a transfer switch!
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Old 06-16-2012, 07:28 AM   #3
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Well, I had to get the Generator belt replaced and now there is no 110V power to the coach. According to my Onan Warranty, the Belts and Pullies are covered for "Life of the Generator, parts and labor for the first owner" and I am the Only Owner.
I guess the authorized shop wants to make up the money
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Old 06-17-2012, 05:58 AM   #4
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In my 2004 Land Yacht 30 ft w/slide, I was told by the factory that the transfer switch is in the rear trunk on the right hand side behind a panel. I just found that out this past Monday at Jackson Center, but haven't had tome to check it out. I want to find the box and attempt to add a second 20 amp service cord to run the rear AC while the front AC is running off the 30 amp service.
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Old 06-17-2012, 08:44 AM   #5
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I want to try the same AC thing on our '95 30'. Let us know how the project is going.
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Old 06-18-2012, 09:55 AM   #6
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http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/24041285/srt/pa/pging/1/page/1.cfm

This link takes you to a "how-to" article. I purchased a kit from Power Solutions to do this, but have been searching for over a year on where the transfer switch box is located. I have not have the opportunity to see if the factory was correct on where it is located. I think Power Solutions is no longer in business.
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Old 06-19-2012, 12:52 PM   #7
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Well, I am done with my "ONAN" 5500 repairs. I am the original owner of this coach and my onan warranty says LIFETIME ON BELT PULLIES AND STATOR FOR THE FIRST OWNER. Had to pay the shop to get my RV. Now I am looking for a ambulance chaser(Lawer) to get my money back from ONAN.
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Old 06-26-2012, 10:12 AM   #8
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Quote:
Originally Posted by Airstream12557 View Post
In my 2004 Land Yacht 30 ft w/slide, I was told by the factory that the transfer switch is in the rear trunk on the right hand side behind a panel. I just found that out this past Monday at Jackson Center, but haven't had tome to check it out. I want to find the box and attempt to add a second 20 amp service cord to run the rear AC while the front AC is running off the 30 amp service.
It is not that simple. When I had a 34 ft LY, we did a major rewiring to change the shore power from 30-amp (110 v @ 30 amp) to 50-amp (220 v 1@30amp 1@20amp). This required rewiring the two transfer switches into what was basically one housed in 2 boxes as well as a new shore power cable that has an extra wire in it (from 3-wire to 4-wire). Once done it worked well.

I would caution anyone undertaking this project to be *VERY* well versed in electricity - either as an engineer or electrician. Mine was done by a friend who is an electronics/electrician graduate from the Montreal Institute of Technology. Before undertaking the rewiring, he discussed the circuits and his proposed modifications with CSA (the Canadian equivalent of UL).

I had, some time ago, posted the final circuit diagram to do this on this forum. Pay careful attention to the placement of the time delay relays, as improper placement in the circuit can cause serious damage to the electrical/electronic components of the coach.
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Old 06-27-2012, 07:20 AM   #9
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Quote:
Originally Posted by blkmagikca View Post

I had, some time ago, posted the final circuit diagram to do this on this forum. Pay careful attention to the placement of the time delay relays, as improper placement in the circuit can cause serious damage to the electrical/electronic components of the coach.
Could you post the diagram again?

Thanks
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Old 06-30-2012, 10:08 PM   #10
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Could you post the diagram again?

Thanks
Here it is (again)

http://vsquare.com/howard/photos/air...lectric002.jpg
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Old 07-01-2012, 10:13 AM   #11
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Thanks again. I printed it out this time so I don't loose it again.

If you have time could you take a look at my relay post and tell me what you think?

http://www.airforums.com/forums/f312...ays-93062.html

Thanks
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Old 07-02-2012, 12:10 PM   #12
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50 amp conversion vs extra 20 amp line

There are two solutions here. But in my opinion the easiest and simplist in a LYMH with a generator is to add the the extra 20 amp line. Check out the linkage above. It is well written up with pictures and comments as to how it worked.
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Old 07-02-2012, 11:28 PM   #13
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Originally Posted by BarnacleBill View Post
Thanks again. I printed it out this time so I don't loose it again.

If you have time could you take a look at my relay post and tell me what you think?

http://www.airforums.com/forums/f312...ays-93062.html

Thanks
Bill, you posted the block diagram for the whole coach, while what I posted was the schematic diagram which my friend Ziggy had developed (and discussed with CSA, the Canadian equivalent of UL).

My coach had had two ATS boxes - both had the identical circuit in them. One was for the 30-amp "leg" and the other for the 20-amp "leg" (only the rear air conditioner). These original boxes also switched the neutral wires (i.e., the white wires). CSA told Ziggy that switching the neutral wires was not necessary. Based on this, Ziggy used the existing ATS components to make a single 50-amp ATS circuit spanning both boxes, which is what is shown in the circuit I posted.

The key thing to remember is that there are 60-second time delay relays used to ensure that the power is stable before switching -- this is most important where the switch is to power generated by the generator. The time delay is in addition to the 60-second delay built in to the air conditioners.

As an aside, one of my time delay relays was defective; the rebuild of the circuits allowed me to isolate the malfunctioning relay, which I sourced and replaced.

The shore cable also had to be changed, as the voltage went for 110-volts to 220-volts, thus 4 wires (red, black, white & green). But the shore power change is from 30amps @ 110 volts to 30amps @ 200 volts (OK, I know that it is one leg at 30 amps and the other at 20-amps, but what I'm trying to show is that while there is an increase in the voltage, there is no increase in the current). Thus, there is no need to go to a firehose-sized cable - you can use the same wire gauge cable, but instead of 3 wires it has to be 4. Ziggy was able to source an end-of-roll for me which resulted in my having a 100-foot shore line - I no longer needed any extension cable.

You may want to find a certified electrician to work on this project with you, as any error can be catastrophic.
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Old 07-03-2012, 11:55 AM   #14
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Transfer switch

Quote:
Originally Posted by kmamedia View Post
Hello you all,
I am paying a $100 hr for the mechanic to locate my generator/Shore Switchover box. Anybody know where it is located on a 26 or 30 ft Landyacht???
Thanks
Yip the electronic transfer switch is in the trunk on the right hand side behind a panel. I have two 30 amp sockets installed so I can run both AC units at the same time. I love it.
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