Reply
 
Thread Tools Search this Thread Display Modes
 
Old 09-06-2017, 09:31 AM   #1
4 Rivet Member
 
Pat Cassity's Avatar
 
2015 27' FB International
Montgomery , Texas
Join Date: Jul 2013
Posts: 294
Images: 1
Another 50A/30A Question

I have a 27FB with 2 ACs. I regularly use a 50a to 30a adapter from the AS, so that I can use a 30A cord instead of the massive 50A cord when using two ACs isn't necessary. I always make sure that I only use one AC at a time when doing so. Also, I have found that at times the AC's fan is sufficient for cooling, especially at night when sleeping. Two questions. 1. Does running the AC's fan continuously (6 to 8 hrs at a time) significantly shorten it or the AC's life? 2. When connected to a 30A connection, can I run one AC in the cool mode and run one AC in the fan mode without overloading or damaging the system?
__________________
Retirement! Every day's a Saturday and Monday's no longer exist!
Pat Cassity is offline   Reply With Quote
Old 09-06-2017, 09:43 AM   #2
Rivet Master
 
HowieE's Avatar
 
1991 34' Excella
Princeton , New Jersey
Join Date: Aug 2003
Posts: 7,061
Images: 12
Running the fan only will not effect the life of the refrigeration side of your AC. Fan motors draw minimal current and should not overload the 30 supply while running the other AC.

That said what else are you running in the trailer? Electric hot water heater that uses excessive current? Frig on electric as opposed to gas? Microwave?

You have 30 amps to play with know the current draw of your devices and plan accordingly.
__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles

HowieE is offline   Reply With Quote
Old 09-06-2017, 09:45 AM   #3
Rivet Master
 
Mollysdad's Avatar

 
2017 26' Flying Cloud
Tampa , Florida
Join Date: Feb 2017
Posts: 5,032
Blog Entries: 1
Probably. Make sure other things are off.

30 amp is 3600w. An AC might be 2800w. That should leave you 800 watts to run other stuff. The catch is when starting, the compressor has a spike, the converter/charger is using some power, etc, etc.

Stand by as people cue up to tell you you need a Micro-Air. I'm not going to do that.
Mollysdad is offline   Reply With Quote
Old 09-06-2017, 09:50 AM   #4
Half a Rivet Short
 
2017 30' Classic
Carlisle , Pennsylvania
Join Date: May 2017
Posts: 8,903
Hi

AC fans do wear out. The do so for a variety of reasons. The good news is that they are one of the few things you *can* replace without breaking the bank. On most units, you have an "inside" and an "outside" fan. The outside fan runs when the compressor operates. It likely will die of rust eventually. The inside fan moves the air around in the trailer. Neither one pulls a lot of current. Both are a bit noisy. A small fan from the local Target is another option that may be a bit less noisy.

Bob
uncle_bob is offline   Reply With Quote
Old 09-06-2017, 10:12 AM   #5
Rivet Master
 
HowieE's Avatar
 
1991 34' Excella
Princeton , New Jersey
Join Date: Aug 2003
Posts: 7,061
Images: 12
I don't know of any trailer AC that ever had 2 fan motors. The motor has a common shaft that spins both inside fan blade and outside fan blade at the same time. Historically that type of motor would last 20+ years. Now that said the cheaper junk being used today it is an open question but not one that should limit the use of the fan.
__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles

HowieE is offline   Reply With Quote
Old 09-06-2017, 10:16 AM   #6
Half a Rivet Short
 
2017 30' Classic
Carlisle , Pennsylvania
Join Date: May 2017
Posts: 8,903
Quote:
Originally Posted by HowieE View Post
I don't know of any trailer AC that ever had 2 fan motors. The motor has a common shaft that spins both inside fan blade and outside fan blade at the same time. Historically that type of motor would last 20+ years. Now that said the cheaper junk being used today it is an open question but not one that should limit the use of the fan.
Hi

I've pulled at least one off that was set up that way. Horizontal shaft on the motor so no real way to get anything "inside" to move air.

Bob
uncle_bob is offline   Reply With Quote
Old 09-06-2017, 10:55 AM   #7
Rivet Master
 
HowieE's Avatar
 
1991 34' Excella
Princeton , New Jersey
Join Date: Aug 2003
Posts: 7,061
Images: 12
This may illiterate my point. Ship in about half way to miss the ads.
__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles

HowieE is offline   Reply With Quote
Old 09-06-2017, 11:01 AM   #8
Half a Rivet Short
 
2017 30' Classic
Carlisle , Pennsylvania
Join Date: May 2017
Posts: 8,903
Hi

I don't have pictures, but there are models where the inside fan is on a separate motor. I suspect part of it is to allow you to vary the speed of the inside fan without slowing down the fan on the outside.

Bob
uncle_bob 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
50A at 30A site question MWBishop Batteries, Univolts, Converters & Inverters 9 02-20-2017 09:31 AM
50A to 30A Adapter Roadtech Electrical - Systems, Generators, Batteries & Solar 20 07-29-2015 02:17 PM
Using a 30A cord with a 50A shore power terminal thebreezeman Electrical - Systems, Generators, Batteries & Solar 46 02-08-2015 07:12 PM
50a AS at a 30a campsite bunni Electrical - Systems, Generators, Batteries & Solar 4 09-02-2013 06:05 AM
30A to 50A cord? Bambi_Bandit Electrical - Systems, Generators, Batteries & Solar 9 02-04-2009 03:57 PM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.



All times are GMT -6. The time now is 12:30 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.