Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-15-2012, 06:21 PM   #225
Figment of My Imagination
 
Protagonist's Avatar
 
2012 Interstate Coach
Metairie , Louisiana
Join Date: Dec 2011
Posts: 9,089
Quote:
Originally Posted by Voyager407 View Post
Both of the following statements are found in the 2006 Interstate manual on page H-11:

"If the generator is accidentally started, the box will sense the generator, points will switch, cutting the shoreline connection and establishing the generator connection. This protects the system from a possible overload."

and

"3. If you’re plugged into city and you start the generator, city power has the priority, so the current flow is C to A."

These statements are clearly contradictory. (What a way to write a manual!) Which one is correct?
If your setup is like later models, the generator only puts out 20 amps, vs. 30 amps for shore power. That being the case, it seems that the shore power would have priority. I haven't tried it to verify, however, and don't intend to, except by accident.
__________________

__________________
WBCCI #1105
TAC LA-4

Engineering: Finding complex solutions to simple problems you didn't even know you had.
Protagonist is offline   Reply With Quote
Old 06-16-2012, 09:21 PM   #226
2 Rivet Member
 
Voyager407's Avatar
 
2006 22' Interstate
Orlando , Florida
Join Date: Feb 2007
Posts: 24
Quote:
Originally Posted by Protagonist View Post
If your setup is like later models, the generator only puts out 20 amps, vs. 30 amps for shore power. That being the case, it seems that the shore power would have priority. I haven't tried it to verify, however, and don't intend to, except by accident.
The first paragraph on page H-11 clearly indicates just the opposite. I've never tried starting the generator while hooked to shore power, and like you, I don't intend to. But those conflicting statements in the manual have me wondering. BTW, I've asked two different Airstream servicemen at different times. One said one thing, and the other said another. Terrific!!

I have no idea how many amps my generator puts out. If I ever get the van out of the repair shop, I'll have to check that out. (They're still looking for a source of replacement glass for my rearmost driver side window. They've only had it since March 9.)
__________________

__________________
Voyager407 is offline   Reply With Quote
Old 06-18-2012, 05:48 AM   #227
Figment of My Imagination
 
Protagonist's Avatar
 
2012 Interstate Coach
Metairie , Louisiana
Join Date: Dec 2011
Posts: 9,089
Quote:
Originally Posted by Voyager407 View Post
They're still looking for a source of replacement glass for my rearmost driver side window. They've only had it since March 9.
Try here… CRL Sprinter Van Windows

According to the Sprinter Forums, Atwood used to make the glass for Sprinter-based van conversions. All of them, not just Airstream. Makes sense; Atwood makes half the fittings in my Interstate.

In 2009, Atwood sold their van conversion window division to CR Laurence, who still makes the windows for Airstream Interstates. The Atwood Windows legacy web page gave me the link to the CR Laurence site, and following the links on the CR Laurence site brought me to the page with replacement glass for every model year, that I listed above.

I bookmarked the site for future reference in case I need to get glass replaced for mine.
__________________
WBCCI #1105
TAC LA-4

Engineering: Finding complex solutions to simple problems you didn't even know you had.
Protagonist is offline   Reply With Quote
Old 06-18-2012, 07:13 AM   #228
Rivet Master
 
Skater's Avatar
 
1995 30' Excella
Bowie , Maryland
Join Date: Apr 2005
Posts: 2,343
I used to start the B190's generator while hooked to shore power all the time. This is what a transfer switch does. It should be completely safe to do so. If you really want to be sure, disconnect shore power, start the gen, then measure the voltage on the terminals of your shore power cord. You shouldn't have any.

In the B190, the priority was the generator over shore power - that is, if you started the generator, it took over from shore power, then when you shut down it went back to shore power. In my case, you could easily hear the transfer switch clicking when it switched over, then clicking again when you shut off the generator.
__________________
1995 Airstream Classic 30' Excella 1000
2014 Ram 2500 Crew Cab with Cummins 6.7L Diesel

Sold but not forgotten: 1991 Airstream B190
Sold: 2006 F-250 6.0L Powerstroke Supercab
Skater is offline   Reply With Quote
Old 06-18-2012, 08:25 AM   #229
Figment of My Imagination
 
Protagonist's Avatar
 
2012 Interstate Coach
Metairie , Louisiana
Join Date: Dec 2011
Posts: 9,089
Quote:
Originally Posted by Skater View Post
I used to start the B190's generator while hooked to shore power all the time. This is what a transfer switch does. It should be completely safe to do so. If you really want to be sure, disconnect shore power, start the gen, then measure the voltage on the terminals of your shore power cord. You shouldn't have any.

In the B190, the priority was the generator over shore power - that is, if you started the generator, it took over from shore power, then when you shut down it went back to shore power. In my case, you could easily hear the transfer switch clicking when it switched over, then clicking again when you shut off the generator.
It's that way with late-model Interstates as well, but it shouldn't be. I'll try to explain why I think so…

For late-model Interstates, here are the conditions that apply…
1 - Shore power is nominally 30 amps.
2 - The Cummins Onan 2.5kW propane generator puts out 20 amps.
3 - The owner's manual recommends letting the generator warm up for about a minute before applying loads.
4 - The Energy Management System sheds loads in a specific sequernce when the amperage draw exceeds the amperage available.

Based on these criteria, the way the transfer SHOULD work is this…
A - If you're on shore power and start the generator, the generator should start, but run at idle with no load, until and unless you manually interrupt the shore power.
B - If you're running the generator and connect the shore power, the load should automatically switch to the shore power and leave the generator running at idle with no load until you manually shut down the generator.
C - If the generator is already running at idle and shore power is lost, the load should automatically switch to the generator, with the Energy Management System shedding excess loads as necessary.

The reason for this recommended arrangement, you never have to shed loads when switching from a lower-amperage source to a higher-amperage source. Also, shore power doesn't need a minute to warm up as does a generator, and so can instantly take over.

The 2012 Interstate owner's manual clearly states that the generator has priority over shore power (they fixed the contradiction that was in the older manuals). It's exactly backwards from what common sense says, as outlined above. So, if you start the generator, the loads automatically switch to the generator, even if you're drawing more amperage than the generator will supply, even if you've still got perfectly good shore power available, and even if the generator hasn't warmed up yet.

One thing I would fix if I had my druthers, but not until after the warranty expires.
__________________
WBCCI #1105
TAC LA-4

Engineering: Finding complex solutions to simple problems you didn't even know you had.
Protagonist is offline   Reply With Quote
Old 06-18-2012, 01:20 PM   #230
Rivet Master
 
Skater's Avatar
 
1995 30' Excella
Bowie , Maryland
Join Date: Apr 2005
Posts: 2,343
I don't disagree with you. It always seemed a touch strange to me, too.

It's probably not that hard to rewire the transfer switch to do that; just a matter of changing a few wires around. Or replace the automatic transfer switch with a manual transfer switch.

There may be code reasons that it's wired the way it is, though - I have no idea about that. Might want to double check with an electrician in case there is a really good safety reason to wire it the way it currently is that we're not thinking of.
__________________
1995 Airstream Classic 30' Excella 1000
2014 Ram 2500 Crew Cab with Cummins 6.7L Diesel

Sold but not forgotten: 1991 Airstream B190
Sold: 2006 F-250 6.0L Powerstroke Supercab
Skater is offline   Reply With Quote
Old 06-19-2012, 03:54 PM   #231
Rivet Master
 
73shark's Avatar
 
2011 Interstate Coach
Overland Park , Kansas
Join Date: Aug 2011
Posts: 2,607
I'll bet Jim Parrott at Airstream could tell us why it's that way.
__________________
Glass half full or half empty to an engineer is the glass is twice as big as it needs to be.

PM me for sale info on my 2011. SOLD!
73shark is offline   Reply With Quote
Old 06-20-2012, 01:02 AM   #232
Rivet Master
 
wayneskid's Avatar

 
2010 22' Interstate
Anchorage , Alaska
Join Date: Mar 2010
Posts: 514
Images: 1
Quote:
Originally Posted by 73shark
I'll bet Jim Parrott at Airstream could tell us why it's that way.
I bet he could. Also, I doubt he's sensitive about it but it's Parrett.
__________________
- wayne
2010 Interstate 3500 Twin Bed
(2008 Freightliner CRD Sprinter)
AIR #44779
TAC AK-1 !!
wayneskid is offline   Reply With Quote
Old 06-21-2012, 12:20 PM   #233
Rivet Master
 
73shark's Avatar
 
2011 Interstate Coach
Overland Park , Kansas
Join Date: Aug 2011
Posts: 2,607
My bad. Remembered the double 't's tho.
__________________
Glass half full or half empty to an engineer is the glass is twice as big as it needs to be.

PM me for sale info on my 2011. SOLD!
73shark is offline   Reply With Quote
Old 06-22-2012, 08:05 PM   #234
4 Rivet Member
 
Teamaron's Avatar
 
Currently Looking...
2014 Interstate Ext. Coach
Boca Raton , Florida
Join Date: Jul 2011
Posts: 290
Hi
Rolling along on our 1st trip traveling from Florida to DC and wandering with the heat why the recirculating button on AC won't stay on and switches back to fresh air?

It seems to stay cooler with recirculating mode.

Also being our first trip what is the 'ideal' cruising speed? We've been running about 70 and averaging around 18-19 mpg.

But I have to tell everyone my family loves it and it is the only way to travel!
__________________
Teamaron is offline   Reply With Quote
Old 06-23-2012, 04:30 AM   #235
3 Rivet Member
 
ben322's Avatar
 
2009 Interstate
Bethesda , Maryland
Join Date: Oct 2009
Posts: 105
The recirculation switch is a MB Sprinter oddity. I spoke to a Sprinter tech about it and it is programmed to switch to outside air after a certain amount of time. The cars don't have this feature so I suspect it's possible to modify at the MB dealer.
__________________
2009 Airstream Interstate
ben322 is offline   Reply With Quote
Old 06-23-2012, 07:14 AM   #236
Site Team
 
Lily&Me's Avatar

 
2006 22' Interstate
Normal , Illinois
Join Date: Jan 2009
Posts: 12,159
I always thought it was to improve and stabilize the inside temperature.

We use it with the ac, only, which removes the humidity nicely.


Maggie
__________________
🏡 🚐 Cherish and appreciate those you love. This moment could be your last.🌹🐚❤️
Lily&Me is offline   Reply With Quote
Old 06-25-2012, 02:07 PM   #237
Rivet Master
 
73shark's Avatar
 
2011 Interstate Coach
Overland Park , Kansas
Join Date: Aug 2011
Posts: 2,607
Quote:
Originally Posted by Teamaron View Post
Hi
Rolling along on our 1st trip traveling from Florida to DC and wandering with the heat why the recirculating button on AC won't stay on and switches back to fresh air?

It seems to stay cooler with recirculating mode.

Also being our first trip what is the 'ideal' cruising speed? We've been running about 70 and averaging around 18-19 mpg.

But I have to tell everyone my family loves it and it is the only way to travel!
Maybe they do this because when it's in Recirc, there's no provision to mix any outside air in to prevent CO2 overload. I know that most cars/trucks allow about 10% outside air in when in Recirc mode.

I get about 19 @ 60-65 and it falls off at 70 & above. That's still better than my Tahoe.
__________________
Glass half full or half empty to an engineer is the glass is twice as big as it needs to be.

PM me for sale info on my 2011. SOLD!
73shark is offline   Reply With Quote
Old 06-25-2012, 04:03 PM   #238
Site Team
 
Lily&Me's Avatar

 
2006 22' Interstate
Normal , Illinois
Join Date: Jan 2009
Posts: 12,159
We cruise off the main highways whenever possible, like to stay in the 50-55mph range and get a good, solid 25 mpg.

On the highways, at 70 or so, we get about 23 mpg.



Maggie
__________________

__________________
🏡 🚐 Cherish and appreciate those you love. This moment could be your last.🌹🐚❤️
Lily&Me 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
NEW: 5th Wheel Airstream Airtrekker Boondocking 38 06-25-2016 09:52 PM
2005 Airstream Interstate 22' eBay Watch Airstreams on eBay 0 03-06-2011 07:20 PM
2006 Airstream 22 INTERSTATE eBay Watch Airstreams on eBay 0 02-04-2011 02:30 PM
2010 Airstream Interstate Mercedes Benz Motorhome eBay Watch Airstreams on eBay 0 01-29-2011 03:00 PM
2009 Airstream Interstate 3500 Mercedes Benz Diesel eBay Watch Airstreams on eBay 0 01-08-2011 01:20 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 08:33 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.