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Old 01-27-2012, 11:40 AM   #1
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Yamaha 2400i SHC and A/C unit?

I've been looking at buying a generator and the Yamaha 2400iSHC is listed saying it will run most 13,500 BTU RV a/c units with 16.7 and 20 amps surge. My AC unit is a Coleman Mach 8000 series and I can't find any amp listing for it . Wondering if this Yamaha generator will do the job of running it.
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Old 01-27-2012, 12:28 PM   #2
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I have tried Yamaha 2400 with 13,500 A/C and it worked fine, as a precuation I put my refrigerator on Gas and did not use any other electrical items. The unit is very quite the only problem is the 70 lbs weight hard to move from TV to the ground.
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Old 01-27-2012, 02:24 PM   #3
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My 2400 works well, and you're right; the weight is there.

You might look into the Honda 2000. I heard others say that it works.

Whatever you decide on, go to Wise for your purchase.
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Old 01-27-2012, 02:31 PM   #4
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Hi, I also have a Yamaha 2400. Mine will run my converter, refrigerator and air conditioner. [11,000 BTU] I can handle the 70 lbs, but it has two handles for a better hold of it or sometimes my wife insists on taking one of the handles, reducing the weight by half. [something to consider]
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Old 01-27-2012, 03:41 PM   #5
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I can confirm our ef2400ishc can start our 15,000/btu a/c and run it all day long (bring lots of fuel). Even on a day with 100+ degrees and full sun. I was also able to run the T.V. and fridge on AC also. This was at an elevation of around 500' above sea level. You'll have less output at higher elevations.

I believe a few years ago, they started putting in the start capacitors into the a/c units and they are smarter about starting the fan a little before the compressor kicks in.

I will say I just had to push my luck (just to see) and tried to switch the hot water heater over to electric and that sent it in to the boost mode with high RPM's, so I switched that off before it tripped.
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Old 01-27-2012, 09:56 PM   #6
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What's the fuel consumption like on these and is it possible to hook it up to a tank so you don't have to keep filling it up? I've considered the two smaller Hondas but this looks like a lot less to mess with and it should be great for running 15 amp power tools.
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Old 01-27-2012, 10:15 PM   #7
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We have the Yamaha 2400 ishc and a 11,000 btu AC and it works great! We used it in Colorado with no problems, It's a little heavy but I can manage by myself just fine. Two people makes it easier.
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Old 01-28-2012, 06:17 AM   #8
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Confused ???

I too have the Yamaha 2400ishc but only have used it to run everything but the AC. In the Feburary Blue Beret on page 12 there is an article that says you should NEVER run a 13500 btu AC with the 2400ishc as it could cause damage to the AC. Could someone please clear this up for me?




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Old 01-28-2012, 09:10 AM   #9
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Yamaha states in ther literature that it will run most 13,500 AC . I still can't find definitive specs for my AC . I think it is 14.5 full load but I'm not sure and I can't find what it is at start up but I've got to believe 20 amps would handle it
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Old 01-28-2012, 08:41 PM   #10
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Our A/C is on a 20 amp breaker, so it's not drawing much more than that for long. The demo at the RV show that sold me on this unit showed it boosting up to 4400 watts (22 x 200 watt bulbs) for a full 10 seconds.

I'm actually getting ready to set my EF2400 up to run off an external (boat) 6.6 gallon fuel tank.
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Old 01-31-2012, 01:26 PM   #11
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There's a column in this month's (Feb 2012) Blue Beret, page 12 about this very issue. Apparently Yamaha's official specs say it won't, but their website says it does.
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Old 01-31-2012, 09:32 PM   #12
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Quote:
Originally Posted by ROBERTSUNRUS View Post
Hi, I also have a Yamaha 2400. Mine will run my converter, refrigerator and air conditioner. [11,000 BTU] I can handle the 70 lbs, but it has two handles for a better hold of it or sometimes my wife insists on taking one of the handles, reducing the weight by half. [something to consider]

Hi, I guess that the Green Hat magazine is correct and all the rest of us, or just me, were merely dreaming that our "Yamaha 2400is", [in my case] was actually running our air conditioners. Oh, and I plug mine [trailer] into my house 20 amp circuit too. I also know of people who's air conditioner had failed and was never plugged into house current or a portable generator.
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Old 02-01-2012, 05:23 AM   #13
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The BB article was transferring info the author got from Yamaha. Just because it is in the BB doesn't mean it is incorrect. Some of you anti WBCCI people need to lighten up. jim
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Old 02-02-2012, 03:36 PM   #14
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I am wondering what would happen to the AC if it is underpowered. Would the start capacitor go bad? Or would the entire AC get fried?


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Old 02-02-2012, 04:06 PM   #15
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I am wondering what would happen to the AC if it is underpowered. Would the start capacitor go bad? Or would the entire AC get fried?


Gary
It will usually result in heating the motor, which can eventually damage insulation, windings, bearings, etc.

I think the difference of opinion about whether the 2400i is suitable comes from how people look at things. The 2400 works if you do everything right and manage your power usage, but there's less margin for error. A pair of 2000s in a parallel setup will offer lots of margin for error, so if you run the microwave while the AC is on and the batteries are charging and the refrigerator is on 120v you'll get away with it more often.
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Old 02-02-2012, 09:45 PM   #16
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I am wondering what would happen to the AC if it is underpowered. Would the start capacitor go bad? Or would the entire AC get fried?


Gary
Hi, I don't think the operation of an RV air conditioner is much different than a house type, portable, or window air conditioner; But when we had a brown out at our house, with only 88 volts from my wall socket, my air conditioners would not cycle back on. The fan stayed on, but the compressor wouldn't kick on. At that point, it was useless to run them so I turned them off. No damage was done to them. I still use them when it gets hot here, which isn't that often. [my experience]
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Old 02-12-2012, 11:07 AM   #17
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The demo at the RV show that sold me on this unit showed it boosting up to 4400 watts (22 x 200 watt bulbs) for a full 10 seconds.
That doesn't prove anything. My EF1000 will run my 15a heat gun just fine, but if you measure the amps and voltage it is putting out 10a at 100w; in line with it's 1000w maximum. Your AC might not survive something like that. (on the house power it measures 13.5a at 120v)
The EF1000 will start my refrigerator that normally requires 1700w to start; I bet it is not real good for the refrigerator though, and I don't intend on doing it again.
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Old 02-12-2012, 11:11 AM   #18
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I am wondering what would happen to the AC if it is underpowered. Would the start capacitor go bad? Or would the entire AC get fried?


Gary
The motor will overheat and hopefully it will trip out until it is cool to prevent damage. If it doesn't, you will melt the windings.
My drum sander trips out all the time if I try to sand off too much; don't know if I want to try it with something not really designed for it.
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Old 02-12-2012, 10:49 PM   #19
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That doesn't prove anything. My EF1000 will run my 15a heat gun just fine, but if you measure the amps and voltage it is putting out 10a at 100w; in line with it's 1000w maximum. Your AC might not survive something like that. (on the house power it measures 13.5a at 120v)
The EF1000 will start my refrigerator that normally requires 1700w to start; I bet it is not real good for the refrigerator though, and I don't intend on doing it again.
If you meant to say your EF1000 puts out 10a at 100 volts, then I believe that (seconds before it tripped?). It's rated for 8.3 amps/120 volts. The EF2400ISHC has no problem putting out 16.7 - 20amps at 120amps and boosting up to 4400 watts. I've ran the 15k/btu a/c for many hot days. volts/amp/watts all verified with Fluke and Extech meters.
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Old 02-13-2012, 03:50 AM   #20
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If you meant to say your EF1000 puts out 10a at 100 volts, then I believe that (seconds before it tripped?). It's rated for 8.3 amps/120 volts. The EF2400ISHC has no problem putting out 16.7 - 20amps at 120amps and boosting up to 4400 watts. I've ran the 15k/btu a/c for many hot days. volts/amp/watts all verified with Fluke and Extech meters.
I believe it did 20a at 120v; that is what it claims it maximum is. But 4400w would be 37a at 120v if it actually light them. Did you confirm this with your meters? If not, I suspect it was actually putting out 25a at 96v, the same as my EU1000 put out a measured 10a at 100v when running the 1500w device. If you actually measured 4440w, then Yamaha should change their ratings.

I don't know what it takes to start your A/C, but it is takes more than 2400w, it started it the same way my EU1000 started my refrigerator that requires 1920w to start; dangerously. (welll, it only dangerous if the device isn't designed to trip out on low voltage; which it hopefully is.)
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