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Old 04-23-2016, 05:43 PM   #201
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Year: 1991
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Chassis: International S3800
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I definitely love this build.. Custom HVAC (even down to building my own boards and writing my own controls software) is a passion of mine.. so im totally into any info you post about how it works and what not.. Love this stuff!
-Christopher
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Old 04-23-2016, 06:17 PM   #202
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You must work for YORK now? Not trying to be disrespectful. Just installer for years experience on govt install?
LOVE me some BRADY/TRANE including the Mitsubishi VRF syststems versuses the others
1-800-Mitsubishi? I have a lot of tech numbers? But full support.
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Old 04-23-2016, 06:29 PM   #203
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Sorry
Did we hi-jack the 98 VanHool thread because he asked a question?
Maybe we need this advanced AC in it's own class?
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Old 05-11-2016, 07:24 PM   #204
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Chassis: VanHool T945
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So if your ever building a custom DIY chiller and order TXV valves - make sure they are adjustable!! So the stupid ones I originally ordered 3ton TXVs were NOT adjustable. Even my Hvac guy helping was surprised and hadn't seen a fixed valve before... Wow... So new valves were ordered from Danfoss and I have one in and its operating great! 40deg plates and pumping 45deg water all day long... Almost finished pex plumbing to the rooftop coil - this weekend I should have 3 zones up and running - got lots of fan wiring and 12v thermostats to wire in. I'll be driving bus to CA tomorrow night, excited to work her on the highway again
Pics of rooftop coil...
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Old 05-11-2016, 07:27 PM   #205
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Old 05-11-2016, 07:30 PM   #206
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Also major purchase for bus as I finally got the generator I wanted - 8kw Powertech with a Perkins / Cat Diesel engine.. 1800 rpm continuous duty unit... AWESOME!!!!
Making brackets for a slide mount in my bay this weekend - as soon as I get the yellow beast in (500lbs) I can go on a trip boondocking!!! Rock!
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Old 05-11-2016, 07:32 PM   #207
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Got it in my bay, but not mounted or hooked up yet - so excited...
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Old 05-11-2016, 07:38 PM   #208
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I could use some input on creative ideas for a slide mechanism to hold this 500 pounds and it should be able to extend at least 3 feet. I was looking on forums for truck bed sliders and people making their own with skate bearings and Steel so I was toying with that kind of idea.
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Old 05-11-2016, 07:52 PM   #209
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Those Joey beds would work best for what you're doing. There are used ones occasionally. More people use them in suburbans than trucks. I have no idea what the weight limits are. They should be just short of four feet wide and I'd guess about 6-7 feet long. I believe they slide on side rails, like a drawer. Seems like it would be perfect for your application.
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Old 05-11-2016, 07:52 PM   #210
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Join Date: May 2009
Location: Columbus Ohio
Posts: 4,252
Year: 1991
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Chassis: International S3800
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Rated Cap: 7 Row Handicap
those look similar to the air handlers I built for my zoned House system.. I used EEV's for mine so they can be controlled via computer.. I could vary the superheat and expansion and thus the capacity / load of the system by electronically adjusting the valve. unless your chiller has a variable inverter compressor or has a variable slide valve it will have trouble in Low demand situations..

ive never seen fixed mechanical valves.. every one of them i ever got was adjustable.. and dependong on the application... like in my last bus I had 3 evaporators on 1 compressor I placed a pressure regulator on the output to keep comnstant suction pressure across each coil..

40 degree plates should do you nicely.. though in really humid conditions you may want to run the plates down to 36-38 and pump 40-42 degree glycol to better yank the humidity.. in a bus I found humidity was a tough pull.. t onot over-cool it and still make it nice n dry.. / not clammy...

at a 36 degree plate you shouldnt send any liquid back to the compressor as long as your TxV doesnt open and dump into the coil...

fun stuff you are doing!!! Love it!!

-Christopher
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