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Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: Tikvah on October 27, 2012, 04:27:25 AM



Title: Looking for Mini-Splits
Post by: Tikvah on October 27, 2012, 04:27:25 AM
Funny time of year to be looking, but that is where I am in the conversion process.

I'm looking for two mini-splits.  One about 9000 and the other 12,000  (one in the bedroom, and the other above the windshield).

Ideally, with a heat and cool heat-pumps, and I like the inverter technology.   (Do "Heat Pump" units always have heat?)
Also, they need to be 110-115 voltage.  I only have an RV generator for now.

Trying to stay on a tight budget.  Anyone know where I can get a good deal?

Dave


Title: Re: Looking for Mini-Splits
Post by: robertglines1 on October 27, 2012, 07:33:44 AM
one stop mini-split shop    is one. I used Soleus inverter Type   But shop around for deals and call for free shipping on two or free line sets.  good time of year to deal.   Ebay is good source just compare apples top apples  410 refrigerant is a must to get high performance with low amp use.  Just my experience  fasten all lines secure and you should be good to go. Mine are not road tested. My friends are for over 5 years and doing fine.   Bob   


Title: Re: Looking for Mini-Splits
Post by: Tikvah on October 27, 2012, 08:28:02 AM
Just doing a comparison on the 9000 unit.  Solace Brand.

The Heat Pump is 800W and 7.3A for $439
The Inverter is 730W and 6.5A  for $725

That seems like a small power difference for a big price difference.  Tell me why I want the Inverter.
Also, the 12,000 unit is not available in the 115V with the Inverter... ???

Dave


Title: Re: Looking for Mini-Splits
Post by: Melbo on October 27, 2012, 08:34:00 AM
No hard starts and power spikes with the inverter

HTH

Melbo


Title: Re: Looking for Mini-Splits
Post by: Tikvah on October 27, 2012, 03:11:33 PM
Here is a "Premium" mini-split
http://www.highseer.com/19-seer-inverter-mini-split-ductless/ductless-mini-split-heat-pump-wyb012am9.html (http://www.highseer.com/19-seer-inverter-mini-split-ductless/ductless-mini-split-heat-pump-wyb012am9.html)

I'm shy of the name Pioneer.

But it is 12,000 with 115V.... says it is "Variable Speed"    hmmmm

???  ???  ???
Dave


Title: Re: Looking for Mini-Splits
Post by: Melbo on October 27, 2012, 03:42:28 PM
The inverter changes the AC current to DC current so instead of hard starts and only one speed the compressor runs on DC and just ramps up the speed as necessary to supply the cooling or heating called for from the remote unit.

Just the way it was explained to me.

HTH

Melbo


Title: Re: Looking for Mini-Splits
Post by: jjrbus on October 28, 2012, 04:25:59 AM
I am toying with the idea of adding a mini to the main part of my house.   The concern I have is finding parts and service, a minor problem could be the end of an unsupported unit.

I have no doubts about using a mini they are used every where in Asia.

 Buying a name brand would use up any savings, but buying two chepo's and keeping one for a replacement or parts might be an option?

   Just thinking in print.                                                  JIm


Title: Re: Looking for Mini-Splits
Post by: sledhead on October 28, 2012, 05:59:56 AM
As my heating buddy put it. There are all the same crap inside so save your money and buy a unit that you can get locally at a good price and when it craps out in 4-5 years the new replacement one will be even cheaper then the first.Thanks china for all the low prices . just add a soft start capacitor ( about 20 bucks )         dave   


Title: Re: Looking for Mini-Splits
Post by: robertglines1 on October 28, 2012, 06:44:48 AM
In Evansville Ind for the same model # from over internet. The wholesale supplier wants twice the money..I believe in buy local! But at twice the $ takes the zing out of it.   Bob I have a 24000 Inverter style  Klimaire in home now. 2600sq ft plus basement Midwest over 100 for several weeks.  My elect bill is 55% of what it was last year over same 5 month period and replaced a 5ton and a 3 ton heat pump.  At 108 degree it got to 78 in our home. I am thinking of adding another 12000 next year.(maybe)  The reason I used in home is because of how well they worked in coach. Again I'm on a long term build so have not been road tested.On the other side I have a friend that has been running his for over 5 years.(two)  I have three installed and very seldom run more that one sitting still except for initial cool down or warm up. range from single digets to 100F  Bob


Title: Re: Looking for Mini-Splits
Post by: luvrbus on October 28, 2012, 07:20:30 AM
I was at Sigler a Carrier distributor they had a mini split American made with the Copeland compressor wholesale price on the 12,000 btu was 2800 bucks twice the price of a China made unit 

I have no idea if there is any truth in what I was told but the heavier in weight in a AC unit the better the unit,I did fall for it though and bought 3 six ton roof mounts for the restaurant the Carriers were about 30 lbs heavier than a Goodman the same size 

good luck


Title: Re: Looking for Mini-Splits
Post by: jjrbus on October 28, 2012, 09:01:29 AM
In my search one thing I thing that is brought up often is that a well installed cheap unit will outlast a poorly installed quality unit.  I read it on the internet so it must be true!

 Our resident expert claims that the mini's are not as effective  at removing humidity, like living in a cool sponge was the term used.  I never noticed that in the tropic's.

 How would a soft start capacitor be added?                                JIm


Title: Re: Looking for Mini-Splits
Post by: Oonrahnjay on October 28, 2012, 09:09:21 AM
(snip)   How would a soft start capacitor be added?                                JIm 

     Yeah, if "soft start" is the big thing for a $1700 unit versus a $900 version, I'd like to know that, too.

     BTW, super woodwork in your bus, JJ.  And is there info on your webpage about your leveling system?  Do you use the suspension airbags or separate air jacks?  And what air conditioner do you have installed now? 


Title: Re: Looking for Mini-Splits
Post by: luvrbus on October 28, 2012, 09:16:29 AM
Just remove the capacitor and replace it with a soft start all they do is spike the voltage I replace 200 v capacitors with 300 v all the time that will start one take the laboring out of starting lol

good luck 


Title: Re: Looking for Mini-Splits
Post by: sledhead on October 28, 2012, 11:53:42 AM
On my unit in the bus the soft start kit (capacitor ) you add to the org. capacitor piggy back wires came in the kit can't remember the name .just ask were you buy the a/c . My a/c in the bus is a 9000 BTU cool 10,000 BTU heat comfort aire by heat controller inc jackson mi . Wholesale price $675. + tax.1/4 " and 3/8 " lines extra approx $100. bucks                               dave


Title: Re: Looking for Mini-Splits
Post by: Tikvah on October 28, 2012, 02:11:21 PM
When you talk about soft-start capacitors, are you still talking about mini-splits?   I'm understanding that the Inverter type wouldn't need the soft-start....  they already are ???

How many of you are already using mini-split in your coach?

How many units and what size?

How did you set up the outside unit?

Pictures???

Dave


Title: Re: Looking for Mini-Splits
Post by: jjrbus on October 28, 2012, 03:11:29 PM
(snip)   How would a soft start capacitor be added?                                JIm  

     Yeah, if "soft start" is the big thing for a $1700 unit versus a $900 version, I'd like to know that, too.

     BTW, super woodwork in your bus, JJ.  And is there info on your webpage about your leveling system?  Do you use the suspension airbags or separate air jacks?  And what air conditioner do you have installed now?  

Thanks, sold the bus, had roof air.   

 The air system is super easy to do, or very complicated!  I used the original airbags, unhooked but left the original system in place. Would be better to start a different thread, lots of good idea's out there.   JIm


Title: Re: Looking for Mini-Splits
Post by: Tikvah on October 30, 2012, 06:12:45 AM
Bob, or anyone else with a mini-split, I would really like to know how you set up your outside units.  Two are too wide for a bay, did you stager them?  How do you get enough air movement?

Dave


Title: Re: Looking for Mini-Splits
Post by: robertglines1 on October 30, 2012, 10:34:09 AM
Dave; mci8 tin tent  staggered 2 in one bay and added a cheap fan from wall mart to suck extra air in from under floor. secret is to get fan circle about 18inch diameter to blow outside bus. not hard for outside one but might need a little duct work for inside one.  I also put my front one in spare tire compartment. Vented thru floor of that compartment and added  vents for air intake. When you get one you will notice the exhaust side of fan is only about 18 inches in diameter.(condensor)  If you go to prevostcommunity  web site under HVAC  prob page 3 or 4 there are some inside pictures of my install also google  robertglines1 photobucket pictures.   All is there is bus pictures. I think there might be some of the 98 mini-split pic there. Will try to do better with pictures.   Bob


Title: Re: Looking for Mini-Splits
Post by: Seangie on October 31, 2012, 05:57:20 PM
Dave,

Not sure about others but I am in the market for mini-splits and can share what I have learned.  After spending way to many hours to finally found the perfect unit it arrived damaged....more on that later.

First things first - Really make sure you measure and think through where the inside and outside units are going.  Go to a local AC supplier and take a look at the inside and outside units.  Every manufacturer makes a different size outdoor and indoor units.  The number of zones make a difference in the size of the outside unit as well.  Make sure you have room to run the lines.  Think 3" of lines and electrical (same diameter as your black tank dump).  Make sure you have a plan to run the drain from the evaporator (inside unit).  For the outside unit make sure you have enough airflow in and out of the bay the outside unit will live in (see the CFM specs for the unit)

If you are looking at using more than one unit it may just make more sense to have a single outside unit and 2 zones for the inside.  Keep in mind that 2 outside units take up quite a bit of space (think airflow) Also - Better to get 220 than 110 unless you are going to try to run off your inverter.  I would warn you though that if you don't have a true sine wave inverter you will have problems.  Also - Even if you do have a true sine wave inverter the demand from an AC unit may take a toll on the inverter unit.  (I am not an expert but know enough to be dangerous - ask around if you plan on using your inverter)

Most of the manufacturers use the same compressors.  Controller boards may be slightly different but they all have the same basic make up.  I think for our purposes of using in a Motor Coach the cheaper the better. Only because you'll have to replace it again anyways and if you are not living 24/7 in the motor coach you'll most likely never notice a difference.  Through conversations with AC techs, installers and sales people I have found that the Mitsubishi Mr. Slim is the Creme de la Creme and the cost and size of units is represented through this. Also the cheaper units don't have as many "FRU" parts (field replaceable) so when they die not all parts are replaceable as opposed to the more expensive units that you can order parts for.

Most installers have told me that the electronics for mini-split units are very sensitive to fluctuations in voltage.  Make sure to install a line conditioner in line with the unit and your electronics will thank you and the unit may last as many as 2-3 years longer.

Get a variable speed "inverter" unit.  The reason the non-inverter units are cheaper is that they are no longer being made (for the most part) and manufacturers are dumping them.  An inverter (converts AC to DC power) allows the  AC compressor to run at variable speeds so that when it's 80 degrees outside and your AC is set to 75 the compressor will run slower and save power and when it gets up to 95 the compressor ramps up and keeps up with the demand.  A non-inverter unit will click the compressor on at full speed until the air gets down to 75 and then click off, then click on at full speed again when the air needs to come back on.  It causes higher demand on the electrical system of the mini-split and the electrical system of the motor coach.

As far who to order from - I can only speak from my experience.  I really searched long and hard for the smallest inside unit I could find (these units can be huge) I found a manufacturer (grunaire) that made inside units that were 30" wide.  Perfect for where we needed to place them.  After asking a ton of questions I ordered through acwholesalers.com. (hvacstores.com - all the same company)  The units arrived within 5 days.  I was quite surprised.  When I opened them though the outside unit was completely damaged, like it had been dropped.  The first thing I thought was that I was going to get completely hosed and it would be a long hard battle to get either a new unit or refund from this company (cheapest prices on the web that I could find).  I called them immediately and sent an email as well as filling out a complaint form from their website.  Come monday morning, I was called at 9am from the company and they were amazing through the whole process.  They apologized and accepted the return without me having to pay a cent. The person I spoke with said that they would not be able to replace the unit as it was no longer being made and they had no more in stock.  They offered a deal that was great but unfortunately it would have required 2 outside units and that wouldn't work with our setup.  They did take care of all shipping costs to and from our house.  I would say that it was the best experience I have ever had with an online store.

Good luck in your adventure and make sure to take lots of pictures and tell us all about the install.  Remember - If we dont see pictures then it never happened ;0

-Sean
www.herdofturtles.org (http://www.herdofturtles.org)




Title: Re: Looking for Mini-Splits
Post by: luvrbus on October 31, 2012, 06:16:45 PM
I hope the mini splits workout for you guys I been told over and over by Hvac contractorshe  they do not like generator power and I have seen it up close in a friends bus and at Taylors Coach in Phoenix sucking on a power pole I think they would be ok

 I see different manufactures of the inverter compressors they don't all use the same compressor if you are impressed with the inverter compressor roof tops have those also

 I saw a American Eagle with the inverter compressor with Aislu roof tops I thought they were Coleman  I thought damn the Chinese can copy good  


Title: Re: Looking for Mini-Splits
Post by: pvcces on October 31, 2012, 11:00:26 PM
For what it's worth, we just placed our 14th Chinese heat pump into service. So far, the problems have been tolerable. A small unit developed a slow leak in the inside coil; we replaced it. One small compressor quit pumping and we replaced it with a waranteed unit. A large unit had a misconnected wire in the indoor unit. This was an easy fix, once we identified the problem. We have had two capacitor failures, quick and easy fixes.

The first one went into service 4 years ago; most have been the only source of heat down to about 5 degrees. We have a mix of brands and almost all of the parts are interchangeable. All were bought for well under $1,000, including shipping.

We have not installed any in a bus, so we can't predict what problems that might cause.

We are planning to install another ten or so.

Good luck.

Tom Caffrey


Title: Re: Looking for Mini-Splits
Post by: sledhead on November 01, 2012, 05:40:26 AM
Dave  I have a split unit and it works fine so far no problems at all (just over a year now) . In side unit 9000 btu 9 amps is over the front win 30 " wide 10" high 8" deep .I ran the 1/4 " and the 3/8" line inside 28' to the outside unit in 1st compartment . I installed all and when it was finished I payed a ac guy to test and add 410 ref. for the extra line run $99 bucks. total cost of all inc extra fan $1200.00 . 18" filtered intake from the side (old ac compartment behind driver side front wheel ) used custom made duct off standard outdoor unit to a 8" in line fan through floor witch turns on with org. unit fan and is controlled with a dimmer switch for speed.I use a 2000 watt inverter off batteries or run off my 3500 watt inverter gene. or off the pole. Lots of ac while we are parked but on the road need more after outside is over 95 deg. work in progress    dave   


Title: Re: Looking for Mini-Splits
Post by: luvrbus on November 01, 2012, 05:51:54 AM
Talking to my Hvac contractor all heat pumps now days with the 410 under the high pressure and new type compressors will heat down to colder temps in any unit,

The new Carrier 6 ton roof tops he is installing for us 16 seer units 3 phrase say 20 degrees but he says they will heat at lower than 20 degrees  

Lol I told him I didn't care for the heat part just cool baby,cool baby for Az in August that is what I am looking for I could care less about heat


Title: Re: Looking for Mini-Splits
Post by: Tikvah on November 01, 2012, 05:57:04 AM
I'm convinced I'm doing this.  I think I'm convinced that I'm going to purchase Soleus 9000btu heat pump inverter type.  I can get them for $725 from MiniSplitShop.com

I'm still unclear how I'll install the outdoor units.  There will be two outdoor units because I don't want to depend on 230V.  I only have 115V.  So, finding a way to install them with good air-flow will be my biggest challenge. 

The inside units should be rather simple.  One above the windshield pointing straight back. And one over the bed pointing straight forward.

So, Thanks for the input so far.  Any additional information and pictures about installation of your outdoor units is helpful.

Dave


Title: Re: Looking for Mini-Splits
Post by: luvrbus on November 01, 2012, 06:11:02 AM
I have to ask as I have read the warranty on the mini splits of different brands  if something happens to unit in a bus under warranty how is that covered do you just tell a story and tell them it not in a mobile environment or what ? 

I hate roof tops so I hope the splits work for you guys but you sure give up space and do a lot of work to install a mini split


Title: Re: Looking for Mini-Splits
Post by: Tikvah on November 01, 2012, 06:14:56 AM
I don't know about warranty, but they are inexpensive enough.

My reasons are:

1.  Quite running.   I hate noise of the rooftop units
2.  No roof warts  (I have four Fantastic Vents)
3.  Great directional air flow
4.  Low Power Draw
5.  Did I mention Quiet
6.  Easy to replace (this is a guess)


Title: Re: Looking for Mini-Splits
Post by: luvrbus on November 01, 2012, 06:24:03 AM
What is the big deal about low amps running on a generator they like running at 3/4 of a load and the mini are inexpensive but how about replacement in a bus after everything is built  

I watched Taylor Tours in Phoenix removing 4 of the mini splits in a Prevost it didn't look like fun to me lol 

I don't know much about the home mini splits but this I do know if they were better and cheaper you could take it to the bank the converters and the marine world would be all over the units like white on rice, me I am going to take a wait and see position myself


Title: Re: Looking for Mini-Splits
Post by: jjrbus on November 01, 2012, 10:11:59 AM
I have been under the impression that the "Professional" converters stole their ideas from the conversion community and were the last ones out with anything?
                                                                                       JIm
                                                                         
                                                                         


Title: Re: Looking for Mini-Splits
Post by: luvrbus on November 01, 2012, 10:30:43 AM
I don't think so lol looks the opposite to me


Title: Re: Looking for Mini-Splits
Post by: Oonrahnjay on November 01, 2012, 10:40:17 AM
My reasons are:
1.  Quite running.   I hate noise of the rooftop units
2.  No roof warts  (I have four Fantastic Vents)
3.  Great directional air flow
4.  Low Power Draw
5.  Did I mention Quiet
6.  Easy to replace (this is a guess)   

     Yeah, I'm pretty big on the Low Power Draw part but (besides the directional air flow), it seems to me that these things put out BIG amounts of cooling air.


Title: Re: Looking for Mini-Splits
Post by: luvrbus on November 01, 2012, 11:32:09 AM
I have been doing a little research on the splits today the same btu output applies to those as any ac or heat pump the 12,000 btu is only achieved with the fan on high speed @ max hp the btu's drop with different setting on fan speed a 12,000 btu unit drops to around 9,000 or less on some on low fan speed

I still don't see why the low amp draw would benefit a rv using a generator anyone care to enlightened on that one


Title: Re: Looking for Mini-Splits
Post by: Oonrahnjay on November 01, 2012, 11:42:53 AM
I have been doing a little research on the splits today the same btu output applies to those as any ac or heat pump the 12,000 btu is only achieved with the fan on high speed @ max hp the btu's drop with different setting on fan speed a 12,000 btu unit drops to around 9,000 or less on some on low fan speed

I still don't see why the low amp draw would benefit a rv using a generator anyone care to enlightened on that one

    If someone has a 15 kW generator, low current draw on two or three units makes not a hill of beans.  I've chosen a much smaller gennie (for a number of reasons -- initial cost, physical size, noise level, fuel consumption, etc.) and three 15 Amp units, in addition other loads, would probably mean that I couldn't run all three units without severe "load reduction".  Or maybe I couldn't run all three at the same time.  The same principle applies to shore power -- we all think "I've got a 50 Amp plug" but many times were restricted by power supply design to 30 Amp or even less.  (And, of course, you can't really pull a constant 30 Amp from a 30 Amp supply socket without being in great danger of blowing fuses or breakers, etc.)

    For some people, the low amp draw doesn't matter; some other people might be able to live with a higher steady draw but blow breakers with startup current; other's might find that their families would rebel at not being able to use electric appliances when the air conditioners are running.  But with my "keep it simple, keep it appropriately sized, keep it small enough to fit in the vehicle" approach, the low amp draw does apply.

    Just my way.    BH  NC   USA


Title: Re: Looking for Mini-Splits
Post by: luvrbus on November 01, 2012, 12:10:41 PM
Now you made my point why have 3 and you can only run 1 a generator is sized to run everything in a RV as most of the time you can run only run 2 roof tops if you are careful on a 50 amp plug but a generator will run all 3 at one time amps should not make a difference when on a generator jmo

It is fashion to have a breaker 2 times the amps draw I read the the 12,000 btu split requires a 20 amp breaker why if you only use 9 amps ?

I also see as Sean posted 220v is the way to go 3 of those would create a problem in most RV parks


Title: Re: Looking for Mini-Splits
Post by: Zeroclearance on November 01, 2012, 12:33:42 PM
It's interesting that most folks are buying the cheap splits..   For a few hundred dollars more you can get a Sanyo which is now Panasonic or a Mitsubishi.   I think that it was Mitsubishi who really started the mini splits.   I have purchased two 1 ton Sanyo's on clearance.   I have seen a Soleous up close and the Sanyo spanks it for construction and materials.   The condensors are thicker and look more heavy duty vs the Soleous unit.   Time will tell.   

Interesting enough the lower priced units are mentioning the Sanyo components.   They don't look the same when you pull the covers off.


Title: Re: Looking for Mini-Splits
Post by: luvrbus on November 01, 2012, 12:41:33 PM
To much of a price difference in the units to be the same to me  IMO


Title: Re: Looking for Mini-Splits
Post by: sledhead on November 01, 2012, 02:57:32 PM
I have a rooftop low profile rv ac in the bedroom that we almost never use too much noise,too much air flow.we use a small fan to move the air from the front split unit to cool the whole bus when camping. I have a 30 amp 120 volt plug,prosine 2000 watt inverter charger ,3500 watt inverter gene that we hardly use.Almost all the state and provincial parks we stay in only have 30 amp plug- ins . When we started the conversion way back in 2006 I tried to build as efficiently as possible .Lots of insulation ,low power draw,simple heating and cooling . How things have changed, original appraisal in 2006 on the rv was   $ 210,000 for insurance. Ha! sold sold sold! In today's world at the price of used bus/rvs I have decided to lower my standards so I have too much invested in it now.But as a hobby I love it                         dave


Title: Re: Looking for Mini-Splits
Post by: belfert on November 01, 2012, 05:01:58 PM
Now you made my point why have 3 and you can only run 1 a generator is sized to run everything in a RV as most of the time you can run only run 2 roof tops if you are careful on a 50 amp plug but a generator will run all 3 at one time amps should not make a difference when on a generator jmo

I ran two 15K BTU rooftops for at least a month this summer on just a 30 amp service.  Only tripped the breaker once when I tried to run too many things at once.  Granted, I didn't have the fridge (or anything else) running, but I did have the inverter running in charge mode.


Title: Re: Looking for Mini-Splits
Post by: luvrbus on November 01, 2012, 05:17:28 PM
Good breaker Belfert 2 will draw more than 30 amps running I have never saw a rv even setup to run 2 on 30 amps most have a switch of some type to change ac units


Title: Re: Looking for Mini-Splits
Post by: jjrbus on November 01, 2012, 07:52:51 PM
I had an electronic dohicky in my RV,  it would run 2 roof air on 30 amp by not allowing them to start at the same time. I gave it to Gerry Jenkinson, don't know what became of it?   JIm


Title: Re: Looking for Mini-Splits
Post by: belfert on November 02, 2012, 05:29:20 AM
Good breaker Belfert 2 will draw more than 30 amps running I have never saw a rv even setup to run 2 on 30 amps most have a switch of some type to change ac units

My bus is wired for 50 amp service.  I use a 50 amp to 30 amp converter at home as my home electric was installed for my previous 30 amp travel trailer.  The specs for the Carrier units show them using under 15 amp each, but we all know specs lie especially when the temps were in the 90s outside.  I don't know why it worked, but it did work.

I wouldn't mind having 50 amp service at home, but the cost and difficulty of running the wires stop me.  Since I can run both rooftops on 30 amps I just postpone the upgrade.


Title: Re: Looking for Mini-Splits
Post by: Mex-Busnut on November 02, 2012, 04:16:12 PM
Tikvah:

So far nobody has said anything about how to install the outside units. Now mind you: I am no expert. Please go to my build thread, page 3, and look at the pictures.

http://www.busconversions.com/bbs/index.php?topic=22081.30 (http://www.busconversions.com/bbs/index.php?topic=22081.30)

I placed one on the driver's side, and one on the passenger side of the same bay. Of course, we had to cut square openings in the cargo bay doors, and protect them with expanded metal. We also built scoops to vent them through the floor. Floor openings were protected with expanded metal. If my pictures there don't help, let me know, and I will take a few million more.

These units we bought here in Mexico take a maximum of 8.5 amps, @ 127 volts. These are one ton (12,000 BTU) units, and also have heating strips. We have a 3 KW nominal (4 KW peak) inverter, which should run them O. K. running down the road.

Also (somebody else give your input) maybe a 9,000 BTU might be small for the driver's area going down the road in the sun. That windshield takes a lot of heat!

I wish you success!


Title: Re: Looking for Mini-Splits
Post by: Tikvah on November 02, 2012, 04:29:00 PM
Dr. Steve,

Thank You.  Those are the first pictures I've seen of mini-split installation.  Pictures are worth so much to me.

You said in your post, "When traveling, there is higher air pressure on the side of the bus, than under the bus".  Is this true?  So, I should pull air from the side and vent down through the floor?  I would have done just the opposite. 

As far as the 9000 BTU size... first, our climate is much cooler than yours.  Second, my coach is heavily insulated with spray foam.  Third, I hope to have driver AC while the engine is running.

Dave


Title: Re: Looking for Mini-Splits
Post by: Midwilshire on November 17, 2012, 05:34:29 PM
Dave, did you pull the trigger on a mini-split yet?  -Mike


Title: Re: Re: Looking for Mini-Splits
Post by: Tikvah on November 17, 2012, 05:36:58 PM
Not yet, but soon
Probably two 9000btu inverter type
I think about $725 each


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Title: Re: Looking for Mini-Splits
Post by: Midwilshire on November 17, 2012, 05:47:29 PM
Where you puttin the forward indoor unit?  Same place as Dr. Steve? 


Title: Re: Re: Looking for Mini-Splits
Post by: Tikvah on November 17, 2012, 06:07:09 PM
Directly over the windshield.
facing straight down the middle.
same with the rear unit, over the bed facing up the hall.


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Title: Re: Looking for Mini-Splits
Post by: Scott & Heather on November 17, 2012, 10:46:53 PM
Am I confused...50 amp service at 240 volts at the park is like 12,000 watts...right?


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Title: Re: Looking for Mini-Splits
Post by: Mex-Busnut on November 18, 2012, 05:02:04 AM
Am I confused...50 amp service at 240 volts at the park is like 12,000 watts...right?


Yes: Volts X Amps = watts.

So say you need 1,000 watts out of your inverter @ 120 VAC, on the D. C. side of that circuit @ 13.8 volts you would theoretically need to provide 72.46 amps per hour of service from your battery bank. In reality, you probably want to make plans to provide an extra 25% (90.57 amps total), as there will always be some ineffeciency in your system.

If you have a 24-volt inverter and battery bank, then your current requirement is cut in half and produces the same watts.


Title: Re: Looking for Mini-Splits
Post by: Midwilshire on December 21, 2012, 06:54:55 AM
Well, I purchased a mini-split, installed it, and did a full write-up in my "Introducing the Silverliner" project thread.  We are very happy with the mini-split so far.  For those who might be interested in going this route, I suggest you check out the write up.  Here's a few pics to pique your interest.

(https://lh5.googleusercontent.com/-K8SW0wj5TlQ/UNRqwuqOXnI/AAAAAAAAAYc/W8L8VSmJ3OQ/s400/AC%2520Mount%252016-sml.jpg)

(https://lh6.googleusercontent.com/-ChPIXC-ee7Q/UNRq0LedOAI/AAAAAAAAAYw/z1kR9jPWIWg/s400/AC%2520Mount%252026-sml.jpg)

(https://lh5.googleusercontent.com/-sZ-mEIVLTAQ/UNRql-HhGwI/AAAAAAAAAXc/zsjnKWUXPYg/s400/AC%2520Final%252010-sml.JPG)

(https://lh4.googleusercontent.com/-99ds1C968aY/UNRq_mvZ63I/AAAAAAAAAZo/SgOzeUCwRaU/s400/Bay%2520Prep%2520for%2520AC%252013-sml.JPG)

(https://lh5.googleusercontent.com/-IFCE6TXyWD0/UNRrF6S9YzI/AAAAAAAAAaI/MUeH1vpSRAE/s400/Bay%2520Prep%2520for%2520AC%252026-sml.JPG)



Title: Re: Re: Looking for Mini-Splits
Post by: Seangie on December 21, 2012, 08:29:41 PM
Mike,

Thanks for the story/pics.  I have a dual zone mini split sitting in the garage waiting to go into the bus.  I'll be sure to post about my adventure with it as well.

-Sean
www.herdofturtles.org (http://www.herdofturtles.org)

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Title: Re: Looking for Mini-Splits
Post by: ArtGill on January 01, 2013, 03:03:26 PM
This fall I put a mini split in the rear of my Eagle.  It has an unused compartment across the rear over the engine where the coach air was.

Look up complaints on Solaris. 

I just up the road from you, so please call me if you have any questions.  An excuse to go to Wilmington would OK.

One suggestion I have is to put drains on both ends of the evaporater.  That way the coach not being level will not cause the bed to be wet.

Art


Title: Re: Looking for Mini-Splits
Post by: pvcces on January 01, 2013, 11:11:14 PM
We just ordered 6, 3 of each. We got them from Quality Matters. The whole works, including shipping to the lower 48, was just over $600 per set.

These will be replaceable for the price of an ordinary refrigerator. Brand has no bearing on available parts that I could see. We have installed 14 SEER 13 units, so far, with four or five different labels. The parts from one work in the others.

We didn't buy any of the Soleus brand because they didn't have good enough specs and they seemed to have some heating limitations that we have not seen in any of the others.

If you can match the model numbers on the metal tags, that will reduce the chance of misfits.

Most of the inverter models are only available in 230 volts, as far as I can tell. If you are interested in good performance, stick with the R410A refrigerant.

Good luck.

Tom Caffrey


Title: Re: Looking for Mini-Splits
Post by: Scott & Heather on January 08, 2013, 05:01:35 AM
Definitely want to say subscribed to this thread. Hoping mini splits will be the new standard in coaches. We already have our heart set on building another coach/truck conversion using a freightliner argosy cabover chassis and we want to do a quality job. Never been happy with roof a/c and looking forward to including mini splits in our build. Sean, please def include pics when you do your install. Those of you who are using them already, how do you like them? Quiet? Cold? Efficient?


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