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Old 07-05-2013, 09:15 AM   #31
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Re: Lets talk AC again

Alright, I've been out and done an experiment for you today Opus.

Temperature 'round here was 90 F with 30% humidity yesterday. My workshop/shed has a window A/C unit installed through the wall for days like that.. It's a Kenmore unit of unknown age and is tagged 8,000 BTU. Through the louvers on the outside I can read the label on the compressor; it's marked LRA 48. Translation: LRA means "locked rotor amps." Basically that's a measure of the current needed to get the compressor motor started; once it's running the current draw drops dramatically.

I fired up the EU2000 genny and let it warm for a minute or so and turned off the Eco throttle mode. Plugged in the A/C and crossed my fingers. It starts, but by the sound of it, there's not much margin left over! I don't know whether it would support anything else at the same time (like a refrigerator or serious battery charger for example!). I let it run from 10 am to 1:30 pm and it did alright, though I do feel slightly badly about socking this generator with a heavy load like that. Maybe there's hope for running that combination in the bus while underway. The next test will be how much of the bus it'll be able to cool -- in other words, whether a divider hung somewhere near the front reduces the heat load enough that this A/C can keep it under control.
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Old 07-05-2013, 11:12 AM   #32
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Re: Lets talk AC again

Well cool [excuse pun]! I wonder what the "difference" would be if it were a 10-12,000 BTU unit. Could you go buy one along with a bigger generator and let me know how it goes, please? ;)
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Old 07-05-2013, 08:42 PM   #33
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Re: Lets talk AC again

You may want to buy... get... borrow a clamp on amp meter Or a multimeter that has a clamp on option. This will show you the amp draw of what its using at various times of operation. Some of the higher end models will have a the highest value able to be recalled. I have a fieldpiece model that I use for HVAC work in the field. I know most wont need it once your set up electrically but in the HVAC world a good multimeter is one of the most used devices for troubleshooting.

Most compressors will have all the technical data that you will need to know about amp draw to see if your generator will be able to power it.

I can tell I need to get the onan mounted up and make a video of this so others may be able to see how to make sure you do not overload a leg of your generator. I can only assume that the Honda EU will only have one output leg on it.
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Old 07-05-2013, 10:39 PM   #34
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Re: Lets talk AC again

Speaking of Onan, I have one I need to sell. Thanks for the reminder.
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Old 07-05-2013, 11:03 PM   #35
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Re: Lets talk AC again

Why you selling it if I can ask. Any issues? It seems they are either very good or very bad?
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Old 07-05-2013, 11:12 PM   #36
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Re: Lets talk AC again

No, its excellent, not a thing wrong with it. Been de-carboned, new fuel pump, muffler, 4kw. I have a military genset to go too. I have nowhere to mount a generator on my bus without a lot of work. What little we use one for we have a Champion 3500 we throw on the ground.
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Old 07-06-2013, 06:51 AM   #37
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Re: Lets talk AC again

Makes sense. Hope it works out. I know Im going to have to work up on mine to get it in... well the way I want it to....will be with some work but I have all the metal tools to do that. Plasma cutter..mig welder....etc
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Old 07-06-2013, 10:49 AM   #38
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Re: Lets talk AC again

Quote:
Originally Posted by bapos
Makes sense. Hope it works out. I know Im going to have to work up on mine to get it in... well the way I want it to....will be with some work but I have all the metal tools to do that. Plasma cutter..mig welder....etc
If you ever need an extra set of hands, I'm in Irving and could probably be convinced to help a fellow skoolie!!
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Old 07-06-2013, 12:19 PM   #39
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Re: Lets talk AC again

I have access to whatever tools I dont have. By the time I mounted it, and built a box for it, added a battery tray and a gas tank, cut a hole in the side panel of the bus, build a door....I'm tired already.
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Old 07-06-2013, 11:43 PM   #40
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Re: Lets talk AC again

Quote:
Originally Posted by opus
Well cool [excuse pun]! I wonder what the "difference" would be if it were a 10-12,000 BTU unit. Could you go buy one along with a bigger generator and let me know how it goes, please? ;)
Actually... I do have a 14,700 BTU window shaker here in the house. I've been wondering what it could do for the bus; the problem is how to power it going down the road. The EU2000 didn't even try to start this monster -- it just lit up the overload lamp and said "forget about it!"

I do have a larger generator on hand too: it's an 8kW running/12kW peak set and surely will handle the 14,700 A/C. But that thing is NOISY! I just couldn't live with myself (and no fellow camper could either) if I ran that thing for any length of time. Doubt that it'd be much more bearable while rumbling down the road. Unfortunately liquid-cooled gensets seem to be out of my price range as are the 3-6kW inverter types. Sooo, I've been pondering what might be done to dampen, absorb, and otherwise reduce the ruckus made by this genset I've already got. Stay tuned for some experiments on that front.

In the mean time.. I need to get a divider wall built in my bus so I can evaluate whether 8,000 BTU is going to at least cool the front 15ft well enough for this summer's trip! We have another 99 F day scheduled for this coming Wednesday; hopefully I can get out that afternoon to test a few things.
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