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03-23-2016, 01:59 PM
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#1
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3 Rivet Member
2016 30' Classic
Sammamish
, Washington
Join Date: Feb 2010
Posts: 119
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Running 50A Airstream on 30A
We just traded in our 27' 2010 Classic Limited with 30A service on a 30' 2016 Classic with 50A service. Since the new AS has 2 AC units and I do visit at RV parks with 30A or boondock with 2 Honda 2000W generators I would like to know how to manage the potential AC loads. For example, can I program the thermostat to run only one AC unit and if so, how?
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03-23-2016, 02:49 PM
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#2
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Rivet Master
2005 39' Land Yacht 390 XL 396
Common Sense
, Texas
Join Date: Sep 2007
Posts: 5,319
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We run our 50A motorhome on 30 amp service all the time. Really the only reason you need 50A is to run both air conditioners at the same time.
What you need to do is turn the rear air (usually zone 2) to off, and then make sure the compressor on the front air conditioner is off before you use the microwave oven. It also helps to not use the water heater on AC, but on propane.
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Regards,
Steve
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03-23-2016, 05:21 PM
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#3
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New Member
2014 27' FB International
Brattleboro
, Vermont
Join Date: Sep 2014
Posts: 4
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30A is more than adequate for running everything in your AS other than running both ACs at once. We typically set one AC thermostat to 74 and the second one higher (around 84) as a fallback in case the primary one fails. (We have a 125lb dog that we don't want to cook while we're out.) Other than in the hottest areas of the country, in the heat of summer you're unlikely to need both ACs. But it's great to have them in case of a unit failure (which we've experienced). Be sure you have the 50A to 30A adapter for your power cord.
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03-23-2016, 08:47 PM
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#4
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Rivet Master
Tavares
, Florida
Join Date: Jun 2015
Posts: 1,052
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Pretty much what they said ^^^
Our 2016 27 FC FB has 2 ACs and 50A service. We also lost the front 30A additional power inlet, suggesting adding a genny to the service plug is a no go.
Our thermostat has two zones. Zone 1 is where our thermostat is, in our case, the bedroom. There is a thermometer in Zone 2 as well. You just select the zone, then program what you want (Off, AC, Fan, Heat Pump, etc.)
The propane furnace is on Zone 2 for us.
We wanted two ACs because last year we cooked in our SOB Class B out west.
__________________
“Character is doing the right thing when nobody’s looking. There are too many people who think that the only thing that’s right is to get by, and the only thing that’s wrong is to get caught.” - J.C. Watts Jr.
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03-23-2016, 09:59 PM
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#5
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Some Guy
1968 26' Overlander
2021 25' Globetrotter
Nashville
, Tennessee
Join Date: May 2015
Posts: 406
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You can use the two Honda 2000's (if tethered together) - to run 30 amp. As stated above, don't run but one AC. Set Fridge and Water Heater to LP.
D
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The Jarretts
Nashville, Tennessee
1968 26' Overlander
2019 RAM PowerWagon TV-Petrol Hemi
WBCCI # 22342
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03-23-2016, 11:11 PM
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#6
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3 Rivet Member
2016 30' Classic
Sammamish
, Washington
Join Date: Feb 2010
Posts: 119
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Thank you all for the replies. I do have 2 Honda 2000's and a Marinco 124ARV-25 power cord (a 25 foot cord with a 50A locking female plug and a 30A standard male plug -- no adapters necessary). Now all I have to do is remember to not use the second air conditioner.
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03-24-2016, 04:37 AM
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#7
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Rivet Master
2020 28' Flying Cloud
Upper St Clair
, Pennsylvania
Join Date: Aug 2011
Posts: 2,943
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Does not matter which A/C you use, we use both when plugged into 30A, but not at the same time. Usually the front during the day and the rear bedroom at night.
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2020 28' Twin Flying Cloud
2021 F350 6.7 King Ranch
USAF Master Training Instructor (TI) & (MTI)- 68-72
Volunteer K9 Rehabilitator & Trainer
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03-24-2016, 10:50 AM
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#8
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TinCan
2016 30' Classic
Apache Junction
, Arizona
Join Date: Aug 2011
Posts: 880
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I do it all the time. Only 1 AC at a time. Just use a little caution when making coffee, heating water etc. You can essentially use everything but with a little time management.
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TinCan
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03-24-2016, 10:57 AM
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#9
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Rivet Master
1999 34' Excella
Currently Looking...
Hillsboro
, Texas
Join Date: Feb 2013
Posts: 6,406
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Well.. if you prefer your own bath for hair dryer, curling iron, etc, most of the other electrical should be 'off'.. running either AC, when my bride fires those appliances up, it is a real strain...
Previous owner of our AS ran much of the electrical, on a 15 AMP outlet... absolutely no problem... only power consumers were the Converter and their coffee pot.. yet, the plug was melted pretty good when we bought the AS... so..... something else must have been accidentally turned on... perhaps when they were plugged into a 20AMP?
__________________
Peace and Blessings..
Channing
WBCCI# 30676
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03-24-2016, 11:28 AM
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#10
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Rivet Master
Currently Looking...
Currently Looking...
Currently Looking...
2022 Atlas
Homosassa
, Florida
Join Date: Nov 2010
Posts: 729
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The thermostat should be set up to allow you to select zones. Mine is zone 1 front a/c and zone 2 rear. Just make sure one is off when running the other. Also, with 30 amp manage you other electrical components wisely to prevent overload. Refrigerator, 12v converter/charger, water heater, hair dryer, coffer maker, grill and anything else plugged in. If you are used to 30 amp I doubt that you will have a problem.
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03-24-2016, 06:02 PM
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#11
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3 Rivet Member
Currently Looking...
belen
, New Mexico
Join Date: Jan 2012
Posts: 191
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im surprised NEW ones are NOT more equipped! My 05 Diesel pusher senses what im plugged into and turns things off to keep up with my demand. I have a panel on the wall and I can see it right now that says im drawing 9 amps. the one thing that makes it go nuts is my upright vac. When plugged into 30 and turn on the vacuum it shuts off the ac.
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03-24-2016, 06:19 PM
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#12
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Rivet Master
Commercial Member
Vintage Kin Owner
Naples
, Florida
Join Date: Dec 2005
Posts: 7,508
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That's called 'load shed' and you probably have a sensing board and relays made by Intellitec in your breaker box.
The Airstream Interstate vans use a similar system for a 30 amp service made Precision Circuits Inc.
They both use similar current sensing technology and relays to shut circuits in a pre-determine order to no overdraw your electrical system.
The downside of NOT having a system like this........... You flip a breaker! 😄
Lew Farber
RVIA/RVDA Nationally Certified Master Tech
ABYC Certified Master Marine Electrician
Master Tech Energy Systems, Inc.
AM Solar Certified Installation Center*AMS Lithium Batteries
Lifeline AGM Batteries**Magnum Inverters
541-490-6357
__________________
lewster
Solar Tech Energy Systems, Inc.
Victron Solar Components and Inverters, Zamp Solar Panels, LiFeBlue and Battle Born Lithium Batteries, Lifeline AGM Batteries
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