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Old 02-03-2018, 02:13 PM   #641
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anything with a compressor in it has the potential for damage if it is turned upside down for too long.. if you are leaning it at an angle to get it under the bus then setting it upright directly after you shouldnt have an issue.. laying it down has several possible complications..

1. the compressor sits on isolators and springs.. too much movement of the compressor can stress one ofthe internal freon lines..

2. oil from the compressor will flow out of the compressor, if you tried to use the unit right away after words you can break a valve plate.. but your unit will be sitting upright for some-time befire it gets turned on..

if theres any way you can keep the tilt to a minimum i would.

from a complete off-the-record view of it, i dont think you'll damage it.. but the potential exists.

thats actually the one thing I never did in my HVAC lab was turn one on its back, then set it up and try to use it..

-Christopher

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Old 02-03-2018, 02:59 PM   #642
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Many years ago when we would carry a refrigerator or upright freezer in a pickup truck, with the appliance laying down, the story was that it should be put in place in its proper position and allowed to sit without being plugged in for three solid days. After that it could be used as normal. Something about the fluids draining back down to where they're supposed to be. Sounds like the same thing.
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Old 02-03-2018, 04:29 PM   #643
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I have done it several times with several types of units sides ways,upside down trying to get units in through access hatches or all kinds of other places and also had a Mitsubishi unit a little bigger than the one that you are using but identical set up that I was trying to put up on a roof off of a 24' extension ladder.
About halfway up I dropped it and me cause I tried to catch it anyway it landed on one of its top corners from about 10' up on asphalt.
It dented the corner on the compressor side pretty good. Pulled up on the roof with a rope.had it piped. Evacuated,and wired about three hours later and ready to run but the building didn't have power for two more days but it fired up just fine two days later and has been working 24/7 for about 1-1/2 years now.
Like the others have said. Minimize the tilt time and let it set upright for a few days.
Good luck
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Old 02-03-2018, 10:35 PM   #644
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Well I got one under without tipping it. Bus is parked where there is natural valley between axles and dogs had already kind of dug a hole. 2 min with a shovel and it slid under just fine. Planning to actually hang it/them tomorrow. I want to run the power to these tomorrow as well. Does anyone know what termination and support hardware I need for the liquidtight conduit that the instructions call for?


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Old 02-04-2018, 10:50 AM   #645
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4 ratchet straps as crude hoist.


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Old 02-04-2018, 10:51 AM   #646
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Behold!


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Old 02-04-2018, 10:52 AM   #647
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Will it fit?


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Old 02-04-2018, 10:53 AM   #648
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It will! At least 1/4” to spare after removing grill!


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Old 02-04-2018, 11:07 AM   #649
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One question I have is regarding road dirt/hazards. Are you concerned about it? Will you just have to keep a watchful eye on the dirt level? What about debris? Any kind of additional protective screen?

John

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Old 02-04-2018, 11:11 AM   #650
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Are you planning any road spray protection? I would think a nice metal deflector angled rearward would help keep the coils protected. When I travel the interstates, I see vehicle hitting crap all the time. It's usually tire remnants from commercial trucks.
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Old 02-04-2018, 11:40 AM   #651
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I would wrap the cage with some type of screening, EXCEPT the front of the unit where the Fan is.. that fan you dont want to be behind anything, but esp the 2 sides with exposed condensor you want that screened with a coarse screening that you can remove easily for cleaning of the unit.. you dont want fine screen as it will restrict the airflow too much.

the copper tubes in these things are THIN.. (as me how I know)..
-Christopher
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Old 02-04-2018, 12:09 PM   #652
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For the liquatight you will have to use the same name brand of connectors. Normally you need a straight box connector that goes from the liquatight flex to a 1/2"/3/4" male with a lock ring.
In the pic those look like 3/4" knockouts so you have a few options. You can use the knockout and run 3/4" connectors or you can run 1/2" and also pick up reducing washers to fit the 3/4" knockout to 1/2" connectors or if you have a universal bit/step bit or a big enough drill bit you can leave the knockout in and drill it out to fit the 1/2" connector.
Sometimes for the indoor unit is a pain to get any kind of liquatight flex much less a connector in the unit itself because of very limited space restrictions but you can stop the flex at the wall with a connector and use either a rubber or plastic wire bushing at the box opening in the unit itself.
If I have to wire the units also I usually find it easier to run the extra 20 or so inches of pipe to the opposite side of the unit than the electrical so you have more room to work the electrical.
Looks like you are having fun
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Old 02-04-2018, 12:25 PM   #653
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Ok so I noticed a huge label on the box for the outdoor unit: this side up or permanent irreversible damage will occur. Does anyone know the technical details? If I lean it over to get it under the skirt of the bus is it going to be ruined? If so I guess I’ll have to break out the shovels...


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No, you can lean-it over for a minute. Just let it settle for few hours before firing it up.
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Old 02-04-2018, 04:15 PM   #654
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Front of the rear unit.


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Old 02-04-2018, 04:16 PM   #655
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Front of front unit.


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Old 02-04-2018, 04:17 PM   #656
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Front of bus (unit doesn’t show)


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Old 02-04-2018, 04:18 PM   #657
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Hmmm... I wonder if they should be protected?


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Old 02-04-2018, 04:21 PM   #658
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Another view of the front unit. Will reroute coolant lines seen at top left.


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Old 02-04-2018, 04:28 PM   #659
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Quote:
Originally Posted by johnbloem1974 View Post
One question I have is regarding road dirt/hazards. Are you concerned about it? Will you just have to keep a watchful eye on the dirt level? What about debris? Any kind of additional protective screen?

John

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I guess I have a couple of thoughts about it but the short version is that yes I plan to add a protective screen.

The second answer is that even though I’m going to do it I’m not convinced it would get damaged if I didn’t. I have a Honda fit which when I first bought it folks on forums said that the condenser core was susceptible to road hazards and that it needed additional protection. I went ahead and covered the opening in the air dam with a mesh to prevent road hazards from damaging the condenser core. After a few years the zip ties that I used to secure the mesh failed. I’ve never to taking the time to replace it and have yet to have any problem with it.

Many cars if you look at the location of the condenser core it is every bit as vulnerable as mine are in this approach. And this is also not too different to what OEMs do in bus AC sometimes.

So yeah I guess my answer is two fold I’m not that concerned but I do plan to add additional safety measures just for peace of mind.


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Old 02-06-2018, 06:53 AM   #660
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Hi all,

Sorry if I came across as overly sensitive about the protection for the condenser coils. I think one thing that that we don't talk about that much here - and maybe for the better - is how exhausting and frustrating these projects can be.

I have made many mistakes along the way, probably the biggest of which was underestimating how hard it would be to get the project done well, on a budget, with little assistance, and by a deadline. As Christopher said in another post, deadlines lead to half-assery, which I'm trying to avoid, but there is no doubt the the temptation increases when you're working on a calendar.

I know all of you are just looking out for me and wanting to make sure all this effort and investment don't culminate in a refrigerant dump somewhere on the interstate.

That could well happen. Hopefully not...

Maybe I'll change my mind after the units are up and running, but I don't think I would choose mini splits again. I ridiculously underestimated how much more of a can of worms it is do install these vs. traditional rooftop units. The irony is that I've got a rooftop unit sitting in my garage ready to install, but I'd already decided to use the splits.

I do worry that since they are not made for this application the vibration or lack of reliably level parking/driving will do them in over time, maybe rendering this all a frustrating and expensive learning experience.

We'll see.

Anyway, thanks to all for your feedback. Even if I'm not always receptive I probably always need to hear it. My greatest fear is that the whole project was a bad idea, but I've made it this far...
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