Staying 'Cool' this summer.

Topic: Staying 'Cool' this summer. (Read 11729 times) previous topic - next topic

Re: Staying 'Cool' this summer.

Reply #75 – March 31, 2020, 12:42:01 am

Re: Staying 'Cool' this summer.

Reply #76 – March 31, 2020, 12:54:39 am

That would work, the unit sits outside of the area it cools. Works like a roof package unit for a house with supply and return.

Re: Staying 'Cool' this summer.

Reply #77 – March 31, 2020, 01:15:40 am

Quote from: craneman – March 31, 2020, 12:32:45 am

If it is exhausting to the inside it would not cool the coach, and if it exhausts to the outside the vacuum created will pull outside air in to equalize it. Think reversal of pressurizing to find roof leaks.

Two completely separate systems. Cooling side intake tube from coach to evaporator that cools air, then to exhaust tube that returns cool air to coach. Condenser side is outside, Outside unit air blown across condenser to remove heat that stays outside. Much like your roof air, without ducting. Don't forget, unit is outside coach. just like your roof air is outside coach. Inside units are completely different.
Think more like your house system, condenser and compressor outside, heat is rejected outside. Only difference is evaporator is outside and just sucks in warm air from coach, and pushes back in cold air back into coach. Good system, pressure in coach remains constant. Kind of a poor man's mini-split.

Re: Staying 'Cool' this summer.

Reply #78 – March 31, 2020, 10:00:53 am

Quote from: jcus – March 31, 2020, 01:15:40 am

Two completely separate systems. Cooling side intake tube from coach to evaporator that cools air, then to exhaust tube that returns cool air to coach. Condenser side is outside, Outside unit air blown across condenser to remove heat that stays outside. Much like your roof air, without ducting. Don't forget, unit is outside coach. just like your roof air is outside coach. Inside units are completely different.
Think more like your house system, condenser and compressor outside, heat is rejected outside. Only difference is evaporator is outside and just sucks in warm air from coach, and pushes back in cold air back into coach. Good system, pressure in coach remains constant. Kind of a poor man's mini-split.

Thinking of building a insulated box where the muffler was... having this sit in the box and the filter vented through the slats on the grill. The hoses will run through the bed into the bedroom.. just thinking out loud at this point.. havnt plugged it in and tried it yet

Re: Staying 'Cool' this summer.

Reply #79 – March 31, 2020, 11:05:14 am

Don't put it in an insulated area, it will burn up the compressor. The coils have to radiate the heat or cold air pulled from inside. An example I had experience with in the crane business was old condensers were smaller than the new high efficiency ones. The original units were installed in concealed boxes on the roofs for cosmetic reasons. When new condensers replaced the old ones, not enough air could get to the coils and they burned up the compressors.

Re: Staying 'Cool' this summer.

Reply #80 – March 31, 2020, 01:02:02 pm

10,000 btu Portable DIY Air Conditioner & Heater | Shop Now

Looks ideal for a front mount with some through dash hoses.
Maybe better than the minsplit as far as inside space is used.

Re: Staying 'Cool' this summer.

Reply #81 – March 31, 2020, 01:06:10 pm

Here's the finished stand and air handler on the dash. I've got a scrap piece of plywood to even the load with the plastic supports, too. I'll never be able it to center it because of the dash lifting on the left, I'll be able to move it over a little once I get the unit fired to see how the application goes. Making a plywood piece today to fit the slider window with a hole for the return lines, power and drain tube to go down to the condenser, which (I hope) will mount on a pad underneath just in front of the wheels. It's gettin' "warmish" here; I better get movin' !

Re: Staying 'Cool' this summer.

Reply #82 – March 31, 2020, 01:12:32 pm

Quote from: craneman – March 31, 2020, 11:05:14 am

Don't put it in an insulated area, it will burn up the compressor. The coils have to radiate the heat or cold air pulled from inside. An example I had experience with in the crane business was old condensers were smaller than the new high efficiency ones. The original units were installed in concealed boxes on the roofs for cosmetic reasons. When new condensers replaced the old ones, not enough air could get to the coils and they burned up the compressors.

The main insulation was to keep the engine heat off it.... thinking the grill and enough room around it with the filter part facing out should do it.. I think..

Re: Staying 'Cool' this summer.

Reply #83 – March 31, 2020, 01:19:44 pm

In a GV, there is a lot of wasted space up behind the front bumper, both in the middle and the sides. The weight of the big unit is about 69 lbs so not much of a problem building a rack to hold it. Here are the dimensions: 31.25 x 7.25 x 11 in (Indoor Unit) – 35.8 x 15.0 x 23.8 in (Outdoor Unit)

Also like David's idea if you have a resonator installed. Lots of room where the muffler was.

The efficiency is not very good, both for heating as well as cooling. See the energy guide at: 16 SEER 12000 BTU Ductless AC Mini Split Air Conditioner Heat Pump -...

Another option would to mount a high efficiency window AC under the front of a GV and duct the cool air to the main salon. Much easier to bring cool air to the interior than running plumbing. No possibility to use re-circulation this way. These Energy Star rated LGs are available in several 115V BTU ratings: LG Electronics 12,000 BTU 115-Volt Window Air Conditioner with Remote and...

Pierce

Re: Staying 'Cool' this summer.

Reply #84 – March 31, 2020, 01:32:19 pm

Here's what the 12k Mrcool is rated: VERY GOOD! Here's where the condenser will mount.

Re: Staying 'Cool' this summer.

Reply #85 – March 31, 2020, 02:00:43 pm

I lit my new Mr cool 24k unit at the house today. Unbelievably quiet . My fridge might be louder than the inside unit. The smart remote can be set next to you and the temp will correct to wherever you are at.
Looking very hard to find room for the 12k inside unit in the bus. 32in long .

Under the couch appears to be the best use of space . Build a vertical panel set back 7 in with provisions for air flow .

Re: Staying 'Cool' this summer.

Reply #86 – March 31, 2020, 02:16:40 pm

Mike,

Post photos when you get a chance.

I see they are advertised as "high efficiency." The Dept of Energy sticker shows they are about the same as the ebay models. Wonder why the difference?

Pierce

Re: Staying 'Cool' this summer.

Reply #87 – March 31, 2020, 02:45:58 pm

Quote from: Pierce & Gaylie Stewart – March 31, 2020, 02:16:40 pm

Mike,

Post photos when you get a chance.

I see they are advertised as "high efficiency." The Dept of Energy sticker shows they are about the same as the ebay models. Wonder why the difference?

Pierce

Re: Staying 'Cool' this summer.

Reply #88 – March 31, 2020, 02:56:30 pm

Quote from: mike leary – March 31, 2020, 02:45:58 pm

Mike,

You don't have the Dept of Energy sticker off the box do you?

Pierce

Re: Staying 'Cool' this summer.

Reply #89 – March 31, 2020, 03:29:17 pm

Quote from: Texhub – March 30, 2020, 12:40:01 am

I have posted before the intrest I have in utube poster William Prowse (solar,lithium guy). Well one of his most recent videos was yanked.

I say this because I saw it. In the video he took 2 mpp units with 4 battle born batteries. With solar panels. He was able to setup a 220 system with mpp having 120 vac supplying to the appropriate cb panel box. It was so simple. Worked perfect. I have over simplified the setup as there was some kind of link between the 2 mpp units.

Hopefully he will be able to bring it back onto utube.

For the electric pros. Wouldn't this be a way to provide 220 to a ac system in our coachs with a minimal footprint and actually be cost effective with a current solar installation.?

I too am a fan of his. It looks like he will not be putting it up again, his video with a split phase solar system. He yanked it, he feels too much posible danger with 220 volt systems. This is why, go to 22 minutes in on this recent video of his. You will hear why.

I can picture the rv now, with a big warning to firemen down the sides in big print, "Warning, 220 volts". 110 volts is dangerous enough, it sounds like 220 volts is a whole level up.

https://youtu.be/auows4dPvOc

Re: Staying 'Cool' this summer.

Reply #90 – March 31, 2020, 03:50:18 pm

i like the idea of a 120v to 240v stepper ... should be able to hold the current I wonder..

somthing like this thing

Re: Staying 'Cool' this summer.

Reply #91 – March 31, 2020, 03:51:31 pm

Quote from: Texhub – March 30, 2020, 12:40:01 am

I have posted before the intrest I have in utube poster William Prowse (solar,lithium guy). Well one of his most recent videos was yanked.

I say this because I saw it. In the video he took 2 mpp units with 4 battle born batteries. With solar panels. He was able to setup a 220 system with mpp having 120 vac supplying to the appropriate cb panel box. It was so simple. Worked perfect. I have over simplified the setup as there was some kind of link between the 2 mpp units.

Hopefully he will be able to bring it back onto utube.

For the electric pros. Wouldn't this be a way to provide 220 to a ac system in our coachs with a minimal footprint and actually be cost effective with a current solar installation.?

Actually you can get 120 and 240 out of one single inverter, the Magnum 4448, but the input has to be 48 volts, doable but not that easy, on a coach. I use one on my S&B to supply 220 volts to charge my EV. Use the 120 to run fridges and freezers.

Re: Staying 'Cool' this summer.

Reply #92 – March 31, 2020, 04:52:49 pm

Here's mine 24 k in my house .
There seems to be a new version with the inverter fan and possibly compressor motors.
Look for the GEN 3 DIY versions.

Re: Staying 'Cool' this summer.

Reply #93 – March 31, 2020, 05:38:43 pm

Quote from: Pierce & Gaylie Stewart – March 31, 2020, 02:56:30 pm

You don't have the Dept of Energy sticker off the box do you?

Nope, it got cut up and recycled. RV parks frown on big boxes lying around. Good spec sheet if you scroll down: MRCOOL DIY 12,000 BTU Energy Star Mini Split Heat Pump w/ Smart Controller |...

Re: Staying 'Cool' this summer.

Reply #94 – March 31, 2020, 06:25:14 pm

Thank you for that information.

I am in the beginning of learning solar and lithium. Already leaning toward 48 or 24 system. I like the idea of building my own battery. Also like the idea of the used market. My funding is frugal which doesnt really match the Foretravel account. But I will make it all work. Safety always job 1.

Re: Staying 'Cool' this summer.

Reply #95 – March 31, 2020, 06:41:28 pm

Quote from: Texhub – March 31, 2020, 06:25:14 pm

Thank you for that information.

I am in the beginning of learning solar and lithium. Already leaning toward 48 or 24 system. I like the idea of building my own battery. Also like the idea of the used market. My funding is frugal which doesnt really match the Foretravel account. But I will make it all work. Safety always job 1.

Why don't you think your funding is frugal and does not match the Foretravel account? There are lots of members like us that are on a budget. That's the way we like it and we have prospered because of that outlook. You must have seen my solar cost list from a decade ago. $1400 for a first class solar system (plus less than $400 for batteries) is not going to break the bank. Solar panels are cheaper and more efficient today. I don't even look at it any longer, it just keeps on ticking. This is not rocket science even though many shops blow up the rocket in their shops. I can always post the list again with internet address and cost for all the items.

No need to go used for any of the solar components as they are cheap! Used exotic batteries might be the exception.

Pierce

Re: Staying 'Cool' this summer.

Reply #96 – March 31, 2020, 06:49:01 pm

Quote from: Texhub – March 31, 2020, 06:25:14 pm

Thank you for that information.

I am in the beginning of learning solar and lithium. Already leaning toward 48 or 24 system. I like the idea of building my own battery. Also like the idea of the used market. My funding is frugal which doesnt really match the Foretravel account. But I will make it all work. Safety always job 1.

About the same energy storage of 5 Battleborn's.
Nissan Leaf 48v Battery G1 Lithium Ion 7 kWh 132 ah 2 x BMS 60A Lot of 14 | eBay

Re: Staying 'Cool' this summer.

Reply #97 – March 31, 2020, 10:09:24 pm

Y'know, I question the need for a high dollar lithium battery bank. Just not seeing the need when far more efficient systems already are installed in your Foretravel. Propane refrigeration, 12 volt lights, pump etc. Any decent battery bank will carry you with an occasional bump from the genset, or a modest solar panel installation.

I hear people say they are running their microwaves off battery bank to make breakfast.....or run Mr. Coffee. Whaaat? You don't have a propane stove? French press?

A solution looking for a problem.

Re: Staying 'Cool' this summer.

Reply #98 – March 31, 2020, 10:25:15 pm

Quote from: Chuck Pearson – March 31, 2020, 10:09:24 pm

Y'know, I question the need for a high dollar lithium battery bank. Just not seeing the need when far more efficient systems already are installed in your Foretravel. Propane refrigeration, 12 volt lights, pump etc. Any decent battery bank will carry you with an occasional bump from the genset, or a modest solar panel installation.

I hear people say they are running their microwaves off battery bank to make breakfast.....or run Mr. Coffee. Whaaat? You don't have a propane stove? French press?

A solution looking for a problem.

I actually run my ac of the batteries when driving or sitting. I havnt ran them all night yet but should just for fun to see what it does.

Who needs a french anything with LITHIUM?

Re: Staying 'Cool' this summer.

Reply #99 – March 31, 2020, 10:43:46 pm

Quote from: DavidS – March 31, 2020, 10:25:15 pm

I actually run my ac of the batteries when driving or sitting. I havnt ran them all night yet but should just for fun to see what it does

Sure...crank em down to max cold overnight and get back to us.

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