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Old 06-12-2017, 03:29 PM   #1
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Mounting huge mini split system

So my 12k btu unit came in today ... I know I looked at the dimensions before I purchased but wow .... This unit is huge. Specs are 21.75in tall, 31.5in wide, 13.125in deep. I worked my way under the bus and while there are certainly a few places it'd fit I'm more worried about it getting filthy and beat up. When installed snug against the inner frame and behind the rear wheels I'll have just 14" or so of clearance between the bottom of the unit and the road. I know aerodynamically it would be a bad idea to mount it right on the side of the bus, but is this a bad option otherwise? It would make for a real easy install. Not too concerned with theft ... I'll mount it up high should I go that route. I know somewhereinusa is running their rig with two mounted underneath but not quite sure if their units are as big as mine. It is huge...

Suggestions appreciated. I'll update my build thread once I get this thing mounted!
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Old 06-12-2017, 05:00 PM   #2
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thats the right size... I have 3 in my house and 2 of them are that size and one is larger..
-Christopher
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Old 06-12-2017, 06:01 PM   #3
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Are you talking about the outdoor unit or the unit that should be indoor?
The install instructions are what is best for the unit. Not saying they can't be fudged a little.
Make model style of unit would be nice?
Might have already posted what you bought but time wise for us/me would help if you posted your exact set up and idea's gain?
New stuff and intended locations please.
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Old 06-12-2017, 06:10 PM   #4
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Originally Posted by Jolly Roger View Post
Are you talking about the outdoor unit or the unit that should be indoor?
The install instructions are what is best for the unit. Not saying they can't be fudged a little.
Make model style of unit would be nice?
Might have already posted what you bought but time wise for us/me would help if you posted your exact set up and idea's gain?
New stuff and intended locations please.
http://m.ebay.com/itm/PIONEER-12000-BTU-22-SEER-Inverter-Ductless-Mini-Split-Heat-Pump-120V-10-39-Kit-/111902477753?txnId=1668702210001

Specifically referring to the outdoor half, haha. Thanks!
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Old 06-13-2017, 09:46 AM   #5
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I should also specify that I originally intended to mount it on the back bumper, then under the bus ... I'm now intending on mounting it right to the side if the bus, over my last and rear skinned window on the drivers side, about 4 or 5 feet up. It would make the total width of my bus almost 9 ft .... I know this is slightly illegal and not ideal but it would only extend 4 inches past my drivers mirrors.
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Old 06-13-2017, 10:36 AM   #6
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thats a really bad place for a minisplit to be.. its likely going to be in the direct wind so much that the unit cant control its head pressure.. or impede the condensor fan and set an error code (shuts down the unit).. at road speed.. plus there has to be I think its 8-12" or more rearward clearance for sirflow.. you cant mount it right up against the side of the bus..
-Christopher
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Old 06-13-2017, 11:12 AM   #7
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Originally Posted by cadillackid View Post
thats a really bad place for a minisplit to be.. its likely going to be in the direct wind so much that the unit cant control its head pressure.. or impede the condensor fan and set an error code (shuts down the unit).. at road speed.. plus there has to be I think its 8-12" or more rearward clearance for sirflow.. you cant mount it right up against the side of the bus..
-Christopher
None of the pre-fab'd mounts have 8-12" clearance behind the unit. It looks like the mounts go right up against the wall, giving the unit only a few inches of clearance ... any ideas on how I should tackle this?
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Old 06-13-2017, 11:49 AM   #8
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Quote:
Originally Posted by warewolff View Post
None of the pre-fab'd mounts have 8-12" clearance behind the unit. It looks like the mounts go right up against the wall, giving the unit only a few inches of clearance ... any ideas on how I should tackle this?
does your bus sit so low to ground or is it super crowded underneath where it cant go underside?

the prefab brackets im not a fan of.. they DO work, I juast know these units want every bit of airflow you can give them.. but it had to be somewhat controlled.. at least underside its not direct wind blowing at them.. its filtered to some extent ..

I just think side mounting is just asking for a DOT stop..

I think it can hang under the skirting a little and bot hurt anything, only other clean method I can think of is back porch style mounting.. ive seen it done before and it looks pretty good.
-Christopher
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Old 06-13-2017, 12:45 PM   #9
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Quote:
Originally Posted by warewolff View Post
So my 12k btu unit came in today ... I know I looked at the dimensions before I purchased but wow .... This unit is huge. Specs are 21.75in tall, 31.5in wide, 13.125in deep.
For what it's worth, that's smaller than my OEM basement lockers. They are 25" high, 80" something long and 28" deep I think? I wrote it down somewhere. Would fit in a single bin. So unless you filled your entire under skirt there should be plenty of room for it.
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Old 06-13-2017, 01:03 PM   #10
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The best spot for it underneath without running 20 ft of refrigerant line is behind the rear wheels. I was worried about dirt and grime building up on the unit in that space. I suppose I could mount it underneath the bus -- the unit wouldn't come down lower than my rear axle. Still, 15 inches between the bottom of the unit and the pavement doesn't seem like a lot of clearance if I go over a speed bump with a loaded rear.

Lastly, cadillac, I have a friend that can weld some custom brackets but if the ones I have already work you think that would be a bad idea? With it hanging below my frame it would have air flow for sure. I'm just not confident I wouldn't have the same problems with head pressure underneath as it'll be getting wind down there too. I thought somewhereintheusa is still doing this with no problems?
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