Another 50A/30A Question

[Pat Cassity]

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?

[HowieE]

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.

[Mollysdad]

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.

[uncle_bob]

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

[HowieE]

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.

[uncle_bob]

Originally Posted by HowieE

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

[HowieE]

This may illiterate my point. Ship in about half way to miss the ads.

https://www.youtube.com/watch?v=21JfU3nRMCQ

[uncle_bob]

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