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Old 07-16-2018, 09:34 AM   #1
Mini-Skoolie
 
Join Date: Jun 2017
Location: Southeastern Missouri
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Year: 1995
Chassis: International AmTran Genesis
Engine: DT466
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I知 not finding where this has been covered before.

I値l admit I seem to be challenged when it comes to the search engine on this site. So apologies if this information already exists.

I have a 1995 International AmTran Genesis FE flat nose. DT466/MT643 with 190,000 miles. It was a church bus from down south. So, no rust issues.

IMG_1863.JPGIMG_1920.JPGI have noticed most skoolie conversions involve removing the factory heaters and air conditioning units. My bus has three split AC units. The ones that are midship and in the rear get 田ool but not enough to really help in 90+ degree weather. The third is located just behind the driver and it got cool for a couple of minutes then began blowing hot air. The bus also has the heat and defrost for the drivers area in the dash plus midship and rear under seat heaters that appear to use hot water from the engine cooling system to heat exchangers with electric fans for circulation of warm air.

I have plans to put solar on part of the roof and a deck on the rear of the roof. That makes the split AC units that do not go through the roof attractive to me (I think) if they can be fixed for a reasonable investment. However, if I am going to do the traditional 堵utting of the interior, it will be difficult to work around these wall/ceiling mounted AC units. Does anyone have any links to or personal experience with bus conversions that deal specifically with this issue?

Next for heat I was wondering if anyone has used a diesel fired heater like the Dickinson units with the water loops to not only tap into the factory heater water lines to preheat the engine and heaters but also plumb into underfloor hydronic radiant heat tubing? Again anyone know of project links or have personal experience doing this?

I知 just getting started and would like to have a solid plan before beginning the demo phase. Any help or advice will be greatly appreciated.

Thanks
John
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Old 07-16-2018, 09:59 AM   #2
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Following this thread because I also have an A/C unit that needs to be uninstalled and reinstalled for insulation purposes.

Sweet bus BTW. Good find.
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Old 07-16-2018, 11:14 AM   #3
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because the factory A/C units are so large and bulky and inefficient they are usually removed and replaced with smaller mini splits, window or roof A/C.
The same with the heaters, remove the 2 rear ones but loop the coolant hoses back to the front heat/defrpst.
I believe cost was a limiting factor on the diesel heaters. Though having heat without adding another fuel source is always a good thing.
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Old 07-16-2018, 11:54 AM   #4
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Those factory AC units require the engine to be running. My build thread as info and pictures about in floor heat.
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Old 07-16-2018, 12:16 PM   #5
Mini-Skoolie
 
Join Date: Jun 2017
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Chassis: International AmTran Genesis
Engine: DT466
Rated Cap: 48
Quote:
Originally Posted by djdalfaro View Post
Following this thread because I also have an A/C unit that needs to be uninstalled and reinstalled for insulation purposes.



Sweet bus BTW. Good find.


Thanks djdalfaro
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Old 07-16-2018, 12:19 PM   #6
Mini-Skoolie
 
Join Date: Jun 2017
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Year: 1995
Chassis: International AmTran Genesis
Engine: DT466
Rated Cap: 48
Olmarc

My idea was to use them while on the road and maybe on occasion while sitting. The other systems you mentioned, can they be used while driving?
Thanks
John
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Old 07-16-2018, 12:23 PM   #7
Mini-Skoolie
 
Join Date: Jun 2017
Location: Southeastern Missouri
Posts: 12
Year: 1995
Chassis: International AmTran Genesis
Engine: DT466
Rated Cap: 48
Quote:
Originally Posted by somewhereinusa View Post
Those factory AC units require the engine to be running. My build thread as info and pictures about in floor heat.


Thank you.

I found a short thread that had your heating system in it. WOW!!!! That is an incredible piece of engineering and craftsmanship. Extremely impressive. I知 going to have to spend some time digesting all of that.

One question. I cannot find a build thread for your bus. Does one exist? If so, I壇 really appreciate a link. Again I have to apologize for my terrible search engine skills on this site.

John
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Old 07-16-2018, 12:35 PM   #8
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The factory AC units are probably HUGE capacity units. I have dual air in both my buses, and anyone who suggests I remove them would get a swift kick in the bean bag. You may need to do some maintenance on them to get them nice and cold (I ended up doing quite a bit of this!) but it's relatively straight forward. Christopher helped me a LOT with figuring out my issues.

One thing that really helped was getting a set of manifold gauges from Harbor Freight. if you only have the low pressure side (the single gauges you get otherwise) you only get a small part of the story. i also needed to upgrade my condenser fans and the electric supply running to them, now my bus gets COLD when it's hot out.
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Old 07-16-2018, 01:28 PM   #9
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heaters and air conditioning

I dont have a large bus. Calculated at 648 cubic feet. I am going to have a dash air conditioning/heating/defroster unit in the front.

I am going to have a biggish, ceiling mount, engine driven, air conditioning unit that does not go through the roof at the rear. The condensers for the rear a/c will be skirt mounted. I still dont know if I will have one or two a/c compressors.I will have two heaters (heatexchanger) with fans, one mid ships, one rear. I will be using a webasto heater. It has a built in water pump and fuel pump. This uses the engine coolant, and engine fuel, diesel, and thus is plumbed into the engine also. I will have shut off valves in the engine compartment for drivers heat, and shut off valves next to the driver for rear cabin heat. Actually the valve is going to be under floor and the control next to the driver. In this summer heat I do not think I could keep 7 to ten people comfortably cool on the road.

I will have to run the engine for cooling, not a big deal for me, because most of the time the needed cooling will for driving on the road. Heat does not need the engine running but that is likely to be used more during stand still.

Sounds to me, your a/c systems are working correctly, but need some refrigerant added. One of the systems may have a leak. Time to call in an a/c guy and get things inspected, diagnosed, and estimate for repairs/service. then go from there.

william
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Old 07-16-2018, 07:32 PM   #10
Mini-Skoolie
 
Join Date: Jun 2017
Location: Southeastern Missouri
Posts: 12
Year: 1995
Chassis: International AmTran Genesis
Engine: DT466
Rated Cap: 48
Quote:
Originally Posted by brokedown View Post
The factory AC units are probably HUGE capacity units. I have dual air in both my buses, and anyone who suggests I remove them would get a swift kick in the bean bag. You may need to do some maintenance on them to get them nice and cold (I ended up doing quite a bit of this!) but it's relatively straight forward. Christopher helped me a LOT with figuring out my issues.

One thing that really helped was getting a set of manifold gauges from Harbor Freight. if you only have the low pressure side (the single gauges you get otherwise) you only get a small part of the story. i also needed to upgrade my condenser fans and the electric supply running to them, now my bus gets COLD when it's hot out.


Broke down,
I was thinking if I can get them to work that it sure would be nice to ride down the highway in cool comfort. I have a 95. Any idea of what kind of refrigerant it most like would have in it?

And if you have a bus build thread I壇 love to see how you handled the ac units. It looks like in my bus it値l take major surgery to strip the interior and insulate with these wall/ceiling mounted units.

Thanks
John
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