Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-20-2017, 12:28 PM   #1
3 Rivet Member
 
1971 31' Sovereign
Christine , North Dakota
Join Date: Jun 2015
Posts: 136
Need guidance swapping univolt out for Intellivolt 65amp

My 1971 Airstream has a fully functional Univolt still humming in the corner and it it is working just fine. But I want to upgrade to a newer smarter unit.

My build thread
My 1971 31ft Sovereign -- Airforums

The original setup takes up a lot of space and it has everything compacted into one box, which is nice but its also a pain.

The entire mess sprawled across the floor.







This is the WFCO WF-9865 that I bought locally from an RV dealership.


I searched for a 1971 wiring diagram for a while and turned up a 1972 manual.

*if* I were to reuse (or continue using) the stock fuse box, where would the new power converter/charger connect into this.


I'm thinking about making a cradle that holds the new charger/converter and a pair of battery boxes. In those boxes a pair of Exide group 24 AGM deep cycle batteries (I already have them)

Ideally I'd mount a new fuse box to the shell of the AS permanently where the stock 12v wiring converges.

Then I'd use some sort of quick disconnect (like a winch) to hook up between the batteries and the fuse box.

I don't want to lose or compromise any of the stock functionality
ammeter shunt
12v power from the tow vehicle

This thread looks promising.
Photos Of Converting From Univolt To Intellipower/New Converter -- Airforums.com
__________________

__________________
phlegm is offline   Reply With Quote
Old 06-20-2017, 12:48 PM   #2
Rivet Master
 
Lumatic's Avatar

 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 6,495
Images: 16
Blog Entries: 1
This is what I did
Attached Images
 
__________________

__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic is offline   Reply With Quote
Old 06-20-2017, 12:58 PM   #3
3 Rivet Member
 
1971 31' Sovereign
Christine , North Dakota
Join Date: Jun 2015
Posts: 136
I saw that pic in the thread I linked to.
But my question is which connections on the original univolt do I hook up the new charger/converter to?
__________________
phlegm is offline   Reply With Quote
Old 06-20-2017, 01:12 PM   #4
Rivet Master
 
TG Twinkie's Avatar
 
1974 Argosy 26
Morrill , Nebraska
Join Date: Nov 2009
Posts: 5,099
Images: 2
Blog Entries: 5
As I recall the Univolt connected to the back of the fuse panel.
The positive side of your new converter will connect to the buss which is connected to all of the fuses.
The negative side will connect to the terminal labelled negative load.
If you could post a pic of the back side of the fuse panel perhaps we could confirm the connection points.
It's been 8 years since I replaced the converter in my Argosy. My memory may not be exact. But a pic would help.
__________________
Knowledge: "A gift to be shared. A treasure to receive."
TG Twinkie is offline   Reply With Quote
Old 06-20-2017, 02:08 PM   #5
Rivet Master
 
Lumatic's Avatar

 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 6,495
Images: 16
Blog Entries: 1
If you did not get instructions from the converter manufacturer for instructions can you contact them?

Typically, the chain is: shore power is hooked up to the converter, the converter charges the battery and the battery is connected to the fuse panel. Also the charge line from the tow vehicle is hooked up to the fuse panel. These connections are plainly labeled on the Univolt fuse panel. The converter may also need to be grounded to the trailer body.
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic is offline   Reply With Quote
Old 06-20-2017, 02:15 PM   #6
Rivet Master
 
Lumatic's Avatar

 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 6,495
Images: 16
Blog Entries: 1
Quote:
Originally Posted by phlegm View Post
I saw that pic in the thread I linked to.
But my question is which connections on the original univolt do I hook up the new charger/converter to?
Take this with a hefty dose of salt. in other words confirm confirm confirm. The converter does not attach to the fuse panel directly. The converter attaches to the batteries. The battery attaches to the fuse panel. I think this is how I did it, but it was awhile ago

Twinkle seems to describe a different chain. More than one way to skin the cat.

Randy at Best Converter is a good person to talk to.
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic is offline   Reply With Quote
Old 06-20-2017, 02:42 PM   #7
Rivet Master
 
Lumatic's Avatar

 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 6,495
Images: 16
Blog Entries: 1
Maybe this will help.

By the way, the glass fuses are getting hard to find, Especially the 40 amp. If I were to do it over again now, I would get a new panel.

BTW There is no 71 Service Manual. First manual was 72.
Attached Thumbnails
Click image for larger version

Name:	Univolt.jpg
Views:	28
Size:	258.8 KB
ID:	287876  
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic is offline   Reply With Quote
Old 06-20-2017, 02:54 PM   #8
3 Rivet Member
 
1971 31' Sovereign
Christine , North Dakota
Join Date: Jun 2015
Posts: 136
Thanks for the picture Lumatic

Right now I don't have any batteries hooked up, I haven't left the yard with it.
I *assumed* that the power out of the univolt was split with a feed going to the batteries and a feed going to the fuse box.

I haven't taken it apart yet to get to the nitty gritty.

I bought it used so it did not come with instructions.
I could call WFCO or Randy, but I'd feel bad calling Randy since I have no plans to buy from him.

WFCO has the manuals online
Installation.
http://wfcoelectronics.com/wp-conten...ion-Manual.pdf

Operation
http://wfcoelectronics.com/wp-conten...ors-Manual.pdf

It looks like they suggest that the positive out does indeed "T" through the power distribution center to the battery(ies)


The only experience I have with onboard chargers and multiple batteries was on my pontoon.

That power path was easy as it didn't have any power from the tow vehicle.
shore power plug -> battery charger -> batteries
Then power from the batteries -> battery selector -> fuse box

I think the extra space between components made it easier to plan the path, you weren't trying to compact so many things into one small corner. That was part of the reason I wanted to attach the fuse box to the AS and then use the heavy duty quick connect for easy servicing. Another reason I wanted to make it into separate components is because I am still remodeling and if separate I only have to change the length of the wires in between.

I think I am overthinking it.
I need to do what I always do..
Pull it out, dissect it, make it better.

Thanks everybody.
-ron
__________________
phlegm is offline   Reply With Quote
Old 06-20-2017, 03:20 PM   #9
Rivet Master
 
Lumatic's Avatar

 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 6,495
Images: 16
Blog Entries: 1
Be careful messing with the innards of the Univolt. There are a couple of capacitors that can get your attention even unpowered.

I think Randy would be happy to speak to yu. Future customer you know.
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic is offline   Reply With Quote
Old 06-22-2017, 01:05 PM   #10
3 Rivet Member
 
1971 31' Sovereign
Christine , North Dakota
Join Date: Jun 2015
Posts: 136
Last night I completely removed the original Univolt and its fuse box.

Take a pic of the existing wiring first in case anything goes awry.


My stock gauges don't work anyhow so no real reason to worry about them right now.

I built a wooden box to mount the charger/converter and mounted a 6 circuit ATC fuse block.

Hookup was simple.

Battery positive, AS blue wire, and a 2g wire from the charger were all connected at the new fuse block.

Battery negative, converter negative, and a negative wire from the AS were all connected together with a small bolt/nut/washers.



I still need to cleanup/organize the wiring a bit and add the second battery.
__________________
phlegm is offline   Reply With Quote
Old 06-23-2017, 11:27 AM   #11
3 Rivet Member
 
1971 31' Sovereign
Christine , North Dakota
Join Date: Jun 2015
Posts: 136
I finished up last night.
The electrical outlet says it is a 20amp. It was the only one that had the pins in the correct orientation, sadly it was only available in what I consider an ugly color.




I just re-read the installation manual (OEM Installation Manual For use with WFCO ULTRA III Deckmount Converter WF-9800 Series) and it looks like the WFCO9865 has a max amp draw of 13.9amps, so there is a GOOD chance I was wrong about the plug being 30a.

I can turn on every single LED in my Airstream as well as the LED door light and 'standard' bulb in the 'scare light' and the charger makes no noise.

But the moment I turn on the light fixture that was in the original bathroom above the sink, even by itself, I can hear the charger fan kick on.

That fixture has (3) 1156 filament bulbs in it, the only interior light that I haven't swapped out yet with LED.

I still need to pick up a second battery box and cables to connect the 2.

FWIW, the place I bought the used one also had new ones for considerably more.
__________________

__________________
phlegm is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
swapping out RM 66E and in RM 2510 apltrez Refrigerators 0 05-17-2015 10:53 AM
Any issues swapping out hitch types? IanPoulin Hitches, Couplers & Balls 8 04-02-2014 05:42 AM
Need Guidance Joe O'D Member Introductions 3 06-01-2010 07:16 PM
Upgrading to New TV - Need Guidance Stephen Mick Tow Vehicles 45 11-09-2008 10:18 PM
Swapping out conv/micro for gas oven tport40 2007 Safari SE 6 08-29-2008 04:03 PM


Virginia Campgrounds

Reviews provided by



Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:24 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.