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Old 06-22-2016, 09:43 AM   #1
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Smile Ducted A/C in International Series

Hi,

In which model year did Airstream introduce ducted air conditioning into the International Series?

How difficult is it to install an additional A/C unit to a model that has ducted A/C?

Can a 30 amp system be upgraded to a 50 amps system to handle the additional load from the second A/C?

Thanks
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Old 06-22-2016, 09:19 PM   #2
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Ducted air was introduced in the 2015 model year. Joe
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Old 06-22-2016, 09:24 PM   #3
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I am not an expert, but I don't think you can easily convert a 30a AS to 50a. If you want 50a, better buy it that way.

Can a 30 amp system be upgraded to a 50 amps system to handle the additional load from the second A/C?
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Old 06-22-2016, 11:57 PM   #4
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I am not an expert, but I don't think you can easily convert a 30a AS to 50a. If you want 50a, better buy it that way.

Can a 30 amp system be upgraded to a 50 amps system to handle the additional load from the second A/C?
It's not that difficult to upgrade Airstream's 30 amp 120VAC service to 50 amp service. It is a bit invasive, however, as you need to replace a bunch of electrical items like the plug-in connector, new (and heavier) power cord and a new breaker box at minimum.

It IS extremely difficult to run the required power and communication cables into the fan location that will be serving as the new A/C spot. If you want to have a second Dometic A/C unit run from your existing thermostat, you will not only need a 120VAC circuit @20 amps run from your new breaker box to the new A/C location, You will also need a 4 conductor phone-type data cable run from the existing A/C to the new one so they can both 'talk' to the same t/stat.
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Old 06-23-2016, 06:11 AM   #5
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You will also need a 4 conductor phone-type data cable run from the existing A/C to the new one so they can both 'talk' to the same t/stat.
That may be the toughest part of the whole operation, depending on how "factory" a person wants to be.
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Old 06-23-2016, 11:50 PM   #6
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I've done service panels before but one thing that kind of gets me confused is how the rest of the AS would be wired. 50 amp service is two phased, with 50 amp each on red and black, right? All fine and dandy, but many RV parks only have 30 amp service, which is single phase. So does this mean if I use an adapter to plug in a 50 amp plug into 30 amp, one bar in the 50 amp panel is not going to be energized and any breakers connected to it won't get any power?
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Old 06-25-2016, 05:15 AM   #7
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I've done service panels before but one thing that kind of gets me confused is how the rest of the AS would be wired. 50 amp service is two phased, with 50 amp each on red and black, right? All fine and dandy, but many RV parks only have 30 amp service, which is single phase. So does this mean if I use an adapter to plug in a 50 amp plug into 30 amp, one bar in the 50 amp panel is not going to be energized and any breakers connected to it won't get any power?
Don't know where you got your information from, but that isn't correct. 50 amp RV power is either 30 amp/20 amp, each on a separate leg (preferred)240v, or a 30/20, both on one leg, 120v. Both are single phase.
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Old 06-26-2016, 08:03 AM   #8
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Don't know where you got your information from, but that isn't correct. 50 amp RV power is either 30 amp/20 amp, each on a separate leg (preferred)240v, or a 30/20, both on one leg, 120v. Both are single phase.
http://www.bobhatch.com/electricStuff/whats_it_mean.htm

I don't know this guy or how reliable he is but he seems pretty sure.
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Old 06-26-2016, 07:43 PM   #9
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http://www.bobhatch.com/electricStuff/whats_it_mean.htm

I don't know this guy or how reliable he is but he seems pretty sure.
Looks like almost exactly what I said, down to the 120v x2 on a single leg not being preferable. It is single phase, 120/240v.
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Old 06-26-2016, 10:23 PM   #10
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Almost every 50 amp RV electrical service that I have worked on is a FULL 50 amps to each side of the breaker box. The umbilical cord is 6AWG, as is the connecting cable from the power inlet on the sidewall of the coach to the split breaker box.

Each side of these breaker boxes uses a 50 amp tandem inlet breaker usually placed at the center of the panel. The bus bars alternate so each adjacent breaker is on either #1 bus or #2 bus.......essentially 2 - 50 amp breakers with their levers joined so all power to both busses is disconnected at the same time. The power is also fed using a 6/3 cable with ground where the grounded cable is 8 AWG per NEC specifications. They also share a common neutral.

Here is a shot of an Airstream 50 amp breaker box. Notice the 6AWG cables (black and red) feeding the 50 amp tandem breaker at the center of the box, which then distributes the 120VAC to both sides of the bus bars. You can also see the 6AWG white neutral and the 8AWG solid copper ground coming into the box thru the same portal.

This is an untouched Airstream wiring job.....rat's nest courtesy of the factory ?????
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