Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-08-2008, 06:58 AM   #1
Stray
 
1987 32' Excella
1978 28' Argosy 28
Springfield , Missouri
Join Date: Sep 2006
Posts: 314
Univolt Switch??

A few years back when I purchased my 1987 Excella trailer I noticed a switch behind the left front curtain labeled "univolt switch". I had always assumed the univolt operation was automatic when plugged in to 110. I, therefore, just left it in the "on" position. The unit did already have a solar system. In subsequent reading about solar systems, I read something that made me think this switch might have something to do with the solar system. Perhaps the "on" position when using solar power would let me use some appliances that I otherwise would not be able to. I experimented with that idea last night, and don't believe that's the case. One thing I have noticed is that if the switch is "off" when plugged into 110 I can use the 110 side of plug ins, but lights appear to get brighter when I turn the switch "on". My two questions after all this rambling are: 1)Does anyone have an idea what this switch does, and 2)In what position should it be on when running off solar vs. 110?
__________________

__________________
Stray
nohillgrish is offline   Reply With Quote
Old 10-08-2008, 09:26 AM   #2
Rivet Master
Commercial Member
 
New Borockton , Alabama
Join Date: Sep 2002
Posts: 1,288
Images: 21
Old Univolts with large transformers will hum. At night its annoying to some people. Its a shut off switch and the lights are dimmer because the battery supplies lower DC volts than the Univolt. It was an option for many years.
When running off solar (or not plugged into shore power) there is no power to the Univolt anyway so in that case it doesn't matter.
__________________

__________________
Randy...Converters, Inverters, Trimetric, Surge Protectors, Zamp Solar, AGM Batteries
www.bestconverter.com
68 Overlander is offline   Reply With Quote
Old 10-08-2008, 10:44 AM   #3
Stray
 
1987 32' Excella
1978 28' Argosy 28
Springfield , Missouri
Join Date: Sep 2006
Posts: 314
Randy,
Thank you very much for prompt reply. Your response makes perfect sense. I have been an active reader of the forum for some time, and can't believe I never thought to ask this question that has been bugging me for so long.
__________________
Stray
nohillgrish is offline   Reply With Quote
Old 10-29-2008, 02:00 PM   #4
2006 F350 V10 Ext. Cab LB
 
Driver1's Avatar
 
1998 30' Excella 1000
Sherwood , Oregon
Join Date: Sep 2006
Posts: 129
Images: 12
Always ON

Hi Stray & Randy,

On reading your posts, I was reminded of something I read in my manual about that switch. I ALWAYS leave it ON.

I found and scanned that part for the attached picture. Notice the caution about blowing radio fuses if the switch is off while plugged into shore power.

Walt
Attached Thumbnails
Click image for larger version

Name:	ConverterSwitch.jpg
Views:	104
Size:	1.02 MB
ID:	70485  
__________________
Driver1 is offline   Reply With Quote
Old 10-29-2008, 02:10 PM   #5
Full Timers/Diesel power.
 
Mike Leary's Avatar
 
1983 31' Airstream310
Cactus Hug , Arizona
Join Date: Mar 2007
Posts: 2,540
Images: 11
Huh, I've been turning off the breaker for the Univolt every night for at least fifteen years
and have blown nothing. It's a GFI breaker, so maybe different in mo/hos.
__________________
"A settled wisdom, plus the itch to be elsewhere"
Mike Leary is offline   Reply With Quote
Old 10-29-2008, 08:42 PM   #6
Rivet Master
Commercial Member
 
New Borockton , Alabama
Join Date: Sep 2002
Posts: 1,288
Images: 21
Maybe somebody can explain this that knows why. What I know is there should be no reason for it and know thousands of Airstreams have this option. My 81 had it but I disabled it when I replaced the converter since the new converters don't hum and I see no reason to disable it, less a disconnect for storage and even that doesn't make sense anymore.
__________________
Randy...Converters, Inverters, Trimetric, Surge Protectors, Zamp Solar, AGM Batteries
www.bestconverter.com
68 Overlander is offline   Reply With Quote
Old 10-29-2008, 09:18 PM   #7
Stray
 
1987 32' Excella
1978 28' Argosy 28
Springfield , Missouri
Join Date: Sep 2006
Posts: 314
Walt, thanks for scanned info on the univolt switch, and thanks Mike for easing my worries about what I may have blown. Everything still seems to work fine so, maybe as Randy suggested, someone may have disabled this system before I got the trailer. I am even more suspect that the original univolt was replaced as the one I have doesn't seem to make any noise at all--whether I have the switch on or off. I really appreciate the insight you fellows have shared.
__________________

__________________
Stray
nohillgrish 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
Switch? excella1976 General Interior Topics 2 01-17-2008 05:10 PM
Can someone ID this switch? djfrantic Electrical - Systems, Generators, Batteries & Solar 7 05-14-2007 05:33 PM
What is this switch for? Silverfly 1960 - 1964 Overlander 8 09-21-2004 03:42 PM
What is A/F switch for? DaveJ Airstream Motorhome Forums 3 10-16-2003 06:01 AM
Which switch is which or what 74Sovereign Electrical - Systems, Generators, Batteries & Solar 6 09-10-2002 09:55 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:44 PM.


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.