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I've got a VW T25, and I've bought a mk3 Golf GTi, and I'm going to put the engine out of it into the van.
I noticed the golf has air-con which I quite like the idea of, and if I've got most of the tackle to fit it, I might as well have a try?
If I cobble the evaporator into my heater box (and do something about condensation drainage), mount the condenser behind the front grille and get some long pipes made up to the pump on the engine, will the distance be a problem? The pipes will be about 4 meters long, instead of the 75cm long that they are as standard.
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Shouldn't be - domestic and commercial air con often has very long pipes.
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wont be a problem. is it the pump lines youll be extending? if so, youll need to make sure you use high pressure line (ie couple of hundred psi) and youll probably need a bit more charge in the system than standard. Also take care with the routing as the oil is carried round the system in the refrigerant and you don't want to starve the pump.
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Great news!
I was planning to be able to keep all the pipework OE apart from the pipes to and from the pump.
Would I be able to get away with extending the hoses with barbs and jubilee clips? It works for 200psi air hoses fine? Or should I just bite the bullet and get proper hoses made at a hydraulics place (I presume I could take the existing hoses in and just as them to copy them. but make them 4m longer?)
EDIT: Oh, and would I be OK pressure testing it with normal air before taking it to get vacced and filled?
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Last Edit: Mar 7, 2012 12:26:44 GMT by cobblers
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I wouldn't extend them with hose & clips as the pressure can get a lot higher than that. Assuming it's on R134a of course.
Discharge pressure is dependent on quantity of charge, ambient outside temperature (condensing pressure), and suction pressure. These factors all control discharge pressure in a normally operating system.
For vehicles currently running with freon R-134a only
Outside-----low side-------High side------Center vent temp
60 F -----28-38 psi----130-190 psi ----44-46 F
70 F ------30-40 psi ---190-220 psi ----44-48 F
80 F ------30-40 psi ---190-220 psi ----43-48 F
90 F ------35-40 psi ---190-225 psi ----44-50 F
100 F -----40-50 psi ---200-250 psi ----52-60 F
110 F -----50-60 psi ---250-300 psi ----68-74 F
120 F -----55-65 psi ---320-350 psi ----70-75 F
Most vehicles will have fan cut-in around 200-220 psi.
If you can test with OFn it would be better.
Apparently R134a is supposed to be phased out by 2017.
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Todos con Lorca
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Thanks for that. I'll see if I can just get the existing hoses extended then. I sort of know a chap who makes hydraulic hoses, he should be able to make something that'll handle those pressures easily.
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Hi, the correct hose is PTFE lined which is used for air con and foodstuffs. The fittings are different to hydraulic, but that doesn't matter because you have them already. The hose is attached to the fittings the same way hydraulic hoses are, a crimped on sleeve. So try going to an air con company and asking them to replace the hose with one the length you require, one that does air con repairs to commercials and plant because they are always having to make up hoses.
By the way, when you dismantle the system on the car tape up all the connections straight away to stop air getting in because the water vapour is not good for it. Gaffer tape will do.
Hope this helps!!
Colin
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That does help Colin - Thanks mate!
I know a bloke that does aircon and refrigeration work for pubs etc, I'll get him on the blower and see if he knows anyone for hoses.
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you can use copper lines - that may be your cheapest bet rather than buying premade hoses, and braze the correct fittings on either end to keep the rest of the pipework as standard. You can get the fittings either locally or theres a couple of ebay sellers with a decent range.
don't use jubes and flexy pipe!
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Mar 10, 2012 21:30:05 GMT
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Just wondering, would it be easier having the evaporator in the back of the van and ducting the cold air forwards? Just looking at it from a different angle  John. |
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Hi, yes that will work. Coaches usually have the evap half way along the overhead rack and duct it fore and aft and they are 40' long.
Colin
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megzy
Part of things
Posts: 364
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Mar 11, 2012 22:25:34 GMT
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can you not buy the pipes from VW i though the T25 that were made in brazil all had air con?
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