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Old 04-18-2014, 06:34 PM   #1
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How to install new converter '72 Ambassador

I just received my new progressive Dynamics Intellipower 9245 and cannot figure out how to install it.
I am replacing the original univolt and plan to reuse the fuse block (or DC distribution panel ? )
I have searched for over an hour and still have no clear idea how to wire this thing in my '72 Ambassador.
A diagram would be great,any help appreciated.
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Old 04-18-2014, 07:24 PM   #2
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I don't think I've seen a diagram, but it has been done a time or two for sure. It is pretty basic. Cut off the fuse and distro part of the univolt and add the PD 9245. You'll have to know some basic electrical principles, but it is pretty straightforward. There are only two outputs from the converter, positive and negative.
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Old 04-18-2014, 08:57 PM   #3
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If you look in my images section, you'll see what I did. The wiring is fairly straight forward. I used a new fuse panel combined with the old one to keep the ammeter shunt and allow for future expansion. Mounted the whole thing in an old Makita drill box to get the electrics covered. The fuse at the top is the 50 amp neg batt fuse that was mounted on the wall beside the access hatch. You can just see the edge of the converter on the far left of the photo on the shelf where the old one was mounted. Everything works fine.....Phil.
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Old 04-18-2014, 09:00 PM   #4
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I don't think I've seen a diagram, but it has been done a time or two for sure. It is pretty basic. Cut off the fuse and distro part of the univolt and add the PD 9245. You'll have to know some basic electrical principles, but it is pretty straightforward. There are only two outputs from the converter, positive and negative.
There is also an important "ground" connection, that should be used for safety.

Andy
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Old 04-19-2014, 08:24 AM   #5
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still lost

the two wires that go into the new unit.
this should be the pos and neg cables coming from the battery ?
Do they need to still hook into the original fuse block first then wire jumpers to the new unit or bypass the fuse block and directly wire the battery cables to the new unit ?

I dont want to do this wrong and burn it up,but so far I have not found a clear concise way to install it.
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Old 04-19-2014, 12:44 PM   #6
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here's where I am at so far:
Now I need to know which wires go to the PD9245
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Old 04-19-2014, 12:48 PM   #7
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here's where I am at so far:
Now I need to know which wires go to the PD9245
The black wire on the fuse panel goes to minus.

The red wire on the fuse panel goes to positive.

That's all there is to it.

Andy
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Old 04-19-2014, 01:51 PM   #8
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I don't know vintage trailers or univolts, but.....

What does the univolt converter look like? How many DC wires on it and where do they go? If only two, then take them off the univolt and put them on the new converter, observing polarity. Disconnect the univolt from ac and connect the new converter. There may also be a ground wire, perhaps bare, that will connect to the ground lug on the ac end of the pd converter. I just replaced the magnetek converter in my trailer with the pd9260 and that's all I had to do.

The item at the bottom of your picture adjacent to the fuses is the shunt that provides the capability to measure the current drain. My trailer didn't have one. If that goes to the univolt then you have more research to do. If it goes to a status panel then you will want to leave it in place.



Al
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Old 04-19-2014, 02:12 PM   #9
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I wish it was that simple.....

I removed that original fuse block from the univolt then hooked up all the wires the way they were.

Now I need to know which two wires go in to new charger.

this was supposed to be easy and plug and play,it is far from that......

and ruining my weekend
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Old 04-19-2014, 02:54 PM   #10
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The instructions that came with mine show the pd 9260 connected direct to the battery. But, as i said, i don't have the shunt. It looks like the shunt is between the trailer and the negative side of the battery. If your system as connected now operates normally from the battery, then just connect the plus terminal to either end of the wire from the plus terminal of the battery. To have your ammeter read only battery current ( ammeter reads -50 to 0 to +50 or so), connect the minus side of the converter to the end of the shunt that goes to the trailer. If you want to know how much current the trailer is drawing regardless of where it is coming from (ammeter reads 0 to 50 or so), connect the minus side of the converter to the side of the shunt that goes to the battery. This connection also preserves the accuracy of the converter battery charging voltage. The other way may be ok, but without knowing the value of the shunt I can't say. In either case, don't remove any of the existing wiring, just connect the pd in parallel with what is already there. Pd website may also have some advice.

To be sure, I'm guessing that either the big black or white wire connected to the shunt at the bottom of your picture goes to battery minus, and either the red or blue go to battery plus, probably red. Understand I'm trying to figure this out from first principles, not from any knowledge of vintage trailers, so YMMV, etc.

Al
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Old 04-19-2014, 02:57 PM   #11
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Sorry, part of that not clear. Where I said connect the plus terminal to either end....I meant to say connect the plus terminal of the converter.....

And, i should have noted that the wires from the converter to the rest should be the same size as the largest in the system, e.g. The red, black, or white.

And thanks for helping me get my third rivet (100th) post. :-)

Al
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Old 04-19-2014, 03:19 PM   #12
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Thanks for every ones help so far.

Does this look like its hooked up correctly ?

If so,do I need to upgrade any of the original fuse sizes to larger ones for any reason ?
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Old 04-19-2014, 03:38 PM   #13
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What gauge are the new red wires? They look too small. One of those fuses is a 50 amp, so you should be using wire rated for 50 amps, probably number 6 or larger.

But the connections look right to me.


Al
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Old 04-19-2014, 04:02 PM   #14
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its 10 GA

if I need to use 6 ga wire there is no way two 6 ga wires will fit in the holes......

do I need to upgrade any of the fuses to larger ? what about the fuse that goes to the neg. side of the battery,should that be larger than the original 30 ?

thanks !
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