DPD Air Conditioning for type 2 bus? FAQ

[TheOrangeBus]

[69BahamaYellow]

Perhaps I'm mis-understanding what you are saying. Scooping air up from the bottom with the louvers pointing forward while blowing air down from the top with fans setup as "pushers" seems like it would create stagnant air in the condenser. I would "switch" (if that's what you mean) or verify the polarity of your fan wiring to run them as "pullers" to suck air up through the condenser and out the top; that would complement the airflow that gets scooped up from the louvers.


If you run a condenser fan as a "pusher", there's really no need for a shroud, but since there is a shroud, it probably means the factory intended the fans to "pull" air, so the flow would be from bottom to top. A puller fan with a shroud is much more efficient than a pusher fan (with or without a shroud)

[TheOrangeBus]

[TheOrangeBus]

I recently finished converting my 1973 VW Westfalia over to ATO fuses. I'm posting this here because there is no infomation that I have found about this on buses and the fact that it is a major improvement over the original fuse box in current flow and safety. Especially, if you have AC and/or the accessories I have which are fresh air fans, 50 watt radio, CB radio, and coming soon fog lights.

Does anyone know how I should mount a 12v idle solenoid to work with dual Weber 40 IDFs with a bellcrank linkage from https://www.csp-shop.com/en/engine/type-4-bellcran...8236a.html

[69BahamaYellow]

[69BahamaYellow]

You should also make a copy of that wiring diagram and put it inside a pocket on the back of your kick panel or something. That's a lot of wire you have there

[RocketSurgeon]

Anyone make an estimate on oil capacity for a dpd system? I just finished my install in a Subaru conversion and I had to make a guess on the oil capacity. I have about 18-20oz of pag100 in the system now. I bought some “oil checkers” from amazon and it’s indicating low oil. But it doesn’t look like the most scientific test haha.

So any more info on oil capacity?
_________________
69 Westy

[skills@eurocarsplus]

take the DPD system oil and figure the difference between the Subaru comp and the one they used.

if you over oil it, you will hate life
_________________

[69BahamaYellow]

[AWOL]

Not a very active topic, but still alive. I got a bus that is a ‘74 Westfalia and it has the DPD under dash A/C. The bus is in a good condition but been sitting for years. So it needs some TLC. The AC is not the top of the list, but it is my intend to have it working again sooner or later, For the preparation before working on it, do these DPD units run on R134a or do they need R12? And what belt fits proper between the compressor wheel and the blower? Many thanks.
_________________
‘69 panelvan
‘69 tintop Westy
‘77 Westy

[skills@eurocarsplus]

you'll need to do a 12 to 134 conversion. I would shitcan that piston compressor too.

honestly, I would get a parallel flow condenser and change all the lines. flush the evaporator, replace the TXV and so on...

basically....I would only re-use the dash unit. you can use red-tek which is a R12 substitute...but why?
_________________

[AWOL]

How is a R134 conversion done? And are those compressors that bad? I was planning to replace the lines. And other things like the dryer etc.
_________________
‘69 panelvan
‘69 tintop Westy
‘77 Westy

[69BahamaYellow]

X2 on What Skills said.

Can’t help you on your belt question, but if you decide to upgrade your compressor, I’m in the process of having some 4 rib serpentine pulleys machined to fit type 4 engine crankshafts for a Porsche 914 project. I plan to use the same Style Denso compressor and mount I made for my bus, so Depending on which pulley I use, I’ll post the extras here on the classifieds. I’m making a few different diameter ones ranging from 4” to 4.75” to see which combo of compressor displacement and pulleys work best for the small cabin of a Porsche

I found that changing the V-belt drive to serpentine is a far superior setup. It has never slipped or needed adjustment. If you stick with your York recip compressor, you’ll have no choice but to use a V-belt. Also be aware the original v-belt pulleys you have are an odd angle compared to the belt angle you get on most V-belts today

[AWOL]

Thanks. As said its a very early stage, but better to start orientating early and as you said the V-belts are different these days, so thats why I was wondering which belt to use now for the compressor.
_________________
‘69 panelvan
‘69 tintop Westy
‘77 Westy

[skills@eurocarsplus]

those York compressors are kind of horrible and prone to leaks around the shaft. they are heavy, suck a LOT of power and are generally inefficient. I mean it's literally a piston compressor that just bangs away while in use. I would be looking at a sanden SD series compressor myself.

I would pony up for the mastercool crimp tool as well and buy all the hoses I needed and a selection of fittings. 200 bux will get you a lot of hose and fittings shipped to your door. one hose made locally for example can run you 100 bux.

when I did Daveark's install I was running back and forth to a hose place that sucked ass and spent more time traveling back and forth than it was worth. it was a total shit show.

when you're done with the tool sell it. even if you got 1/2 the initial cost, you'll be $$ ahead in frustration.
_________________

[Cvannoy]

So I am wanting to set up an AC system that runs both when the engine is running and when it is not. Thoughts on using a hybrid vehicle (like Honda's) belt driven and electrically driven AC compressor? This way the AC compressor will be running when the engine is running but when I am at a campsite with shore power and don't want to run my engine all night to cool things down then I can just use the power provided to keep the AC running.

Currently I have a DPD under dash unit but after seeing what 69BahamaYellow did with the overhead unit I am wondering if I can set up an overhead unit in my hightop. I'm not certain it will work though because tootype2crazy mentioned earlier in this thread that he has multiple different overhead AC units and none of them work with his sunroof. I'm assuming that my hightop has cuts that are the same size if not significantly larger than the sunroof cuts. But it would be nice to have airflow to the rear passengers and not just to the people up front.
_________________
1974 Safare Custom Camper
1978 Datsun 280z

[Fairmounter]

[Fairmounter]

I have been thinking a DC compressor using power from the alternator when driving. It would probably take too many batteries to be practical, but possibly off battery power when camping.
_________________
1973 Westy Tintop

[skills@eurocarsplus]

[Fairmounter]