Aircon Anda What's This Question

[ifcho 0]

This was under the dash of a car I'm stripping to bits...

Its a 92 205 1.9 gti, with aircon (not many parts were left from it unfortunately

Anybody know what it is?

 

 

And the second question...now that I have a heater unit from an aircon car...how hard would it be to retro fit an aircon.

I think I need the following parts:

1. compressor (should be easy to find one from a XU engined 306/406, etc?)

2. radiator - (again I can fit any suitable radiator, does not need to be from a 205?)

3. condensor/dehidrator (I'm not sure what this part does, but again, anything that fits in a 205 engine bay should be OK?

4. freon pipes?

5. Dash control? Is there anything specific for the 205 aircon dash control? Can I take one from a 405 for example?

[welshpug 1,657]

clean it up a little and see if there is any writing, might just be a Central locking ECU

[KRISKARRERA 2 1 Cars]

Yeah that's the central locking thingy

[Ryan 99]

And the second question...now that I have a heater unit from an aircon car...how hard would it be to retro fit an aircon.

I think I need the following parts:

1. compressor (should be easy to find one from a XU engined 306/406, etc?)

2. radiator - (again I can fit any suitable radiator, does not need to be from a 205?)

3. condensor/dehidrator (I'm not sure what this part does, but again, anything that fits in a 205 engine bay should be OK?

4. freon pipes?

5. Dash control? Is there anything specific for the 205 aircon dash control? Can I take one from a 405 for example?

 

The main things you'll need:

 

- Compressor

- Condenser (the radiator at the front of the car)

- Drier (the canister on the driver's inner wing)

- Evaporator (the matrix inside the dash) - Guessing you've got this already?

- Pipework

- Pressure switch

- Heater controls

- Aircon switch

- Wiring

- LOTS of misc small parts, although you can improvise most of them if you can't get them.

 

Some of these parts you can get from other models. But you have to make a decision about the gas in the system. Old aircon systems like the 205 used a gas called R12 (aka Freon), which was phased out in 1993-ish and is now virtually impossible to get. It was replaced by a gas called R134 which is used in newer cars. There are R12 substitutes that aircon companies use to fill old systems, but they're not very good to be honest. Since some of the components are specific to the type of gas used (pressure switch, drier canister, compressor) you'll need to decide which gas you're going to use before sourcing components.

 

If you can get the proper 205/309 parts then it's probably easier to build the system as it was from the factory, and use an R12 substitute. If you're having to get parts from other models then R134 parts are 10x more plentiful, and easier to get hold of, but it's more work to get everything installed properly.

Edited May 25, 2008 by Ryan

[2-Pugs 57]

And the second question...now that I have a heater unit from an aircon car...how hard would it be to retro fit an aircon.

I think I need the following parts:

1. compressor (should be easy to find one from a XU engined 306/406, etc?)

2. radiator - (again I can fit any suitable radiator, does not need to be from a 205?)

3. condensor/dehidrator (I'm not sure what this part does, but again, anything that fits in a 205 engine bay should be OK?

4. freon pipes?

5. Dash control? Is there anything specific for the 205 aircon dash control? Can I take one from a 405 for example?

 

 

Your best bet is to try and get as many parts off that scrap 205 that you can, or find another aircon 205/309 that is being broken for spares. Putting it together piecemeal will take ages, as you've got so many odd bits and pieces to find. To continue your list:

 

1. compressor (should be easy to find one from a XU engined 306/406, etc?) - yes, I think any will do but use a 205/309 one to be sure

 

2. radiator - (again I can fit any suitable radiator, does not need to be from a 205?) - the radiator is also different on air con cars, you need the thin (turbo-diesel I think) radiator, the standard one won't fit

 

3. condensor/dehidrator (I'm not sure what this part does, but again, anything that fits in a 205 engine bay should be OK? - ideally, you need the condensor from a 205. The 309 one is different. Whether you can shoehorn in one from another car, I do not know.

 

4. freon pipes? - There are four main pipes which to be honest, you could probably get a hydraulics place to make up. there are also 2 elbows you'll need for the bulkhead.

 

5. Dash control? Is there anything specific for the 205 aircon dash control? Can I take one from a 405 for example? - The air con dash is different to the standard one, it has a built in recirculating mode which admittedly you don't need, strictly speaking. The heater unit has the evaporator built in to (is that the bit you alredy have?)

 

In addition to that lot, you need the following

 

6. Alloy finned sump (alternatley off an mi16), which has the compressor and tensioner mounting points

7. Compressor drivebelt tensioner, which bolts to the sump and of course the drivebelt

8. Double width crankshaft pulley which has extra width for the compressor belt

9. Filter drier and retaining bracket for your inner wing

10. Pressure switch. Which you can get off any Peugeot or Citroen with air con

11. A/C button for your dash, along with the 5-hole trim

12. Remote mounted oil filter and pipes (the oil filter on a normal engine clashes with the radiator)

13. Two fans

14. Fan control relays (off a 205 diesel should work) which switches the fans between low and high speed

15. System control unit, which sits inside the dash and switches the system on and off

16. Wiring loom to join it all up

17. Throttle body with the idle solenoid on top of it to stop it stalling when the aircon is switched on

 

18. In addition you need to cut a hole in your inner wing for the filter/drier and find a new place for your jack to live.

 

So I don't want to sound like I am putting you off, it is certainly possible (I know SuperJosh has retro fitted it to his 205) but it's a big job and trying to get all those parts separately, certainly in the UK, you'd be waiting a very long time

 

Many of the parts are still available from Peugeot but of course, cost a fortune, for instance, the condensor is ~£140.

 

As for the thing in your picture, as the others have said, it's a central locking control unit I believe

 

HTH!?

 

Rob

Edited May 25, 2008 by 2-Pugs

[GLPoomobile 958]

Yeah that's the central locking thingy

 

That is word for word exactly what I just thought out loud to myself! I can never remember what it's called.

[KRISKARRERA 2 1 Cars]

Me neither. All I know is if you keep it in your car and talk into it now and then you can look like Bodie and Doyle in the Professionals!

 

On the Mi16 there's 2 places the aircon tensioner pulley can go - either on the sump or on the spindal bits at the bottom of the block where the alternator adjustor slider thingy is mounted. The latter is preferable in my opinion.

Also on the Mi16 they didn't use a solenoid in the throttlebody, instead when you switch on the aircon the bitron ecu tells the main ecu and that increases the idle. Shame really that it doesn't cut off on full throttle, that's quite a useful thing to have for full throttle.

[Super Josh 4]

As the others have said you should be able to source the parts. You will need a slightly shorter radiator than the standard GTi one, the one listed for a 1.6 auto, it then sits up on a couple of brackets to clear the compressor.

 

To convert to R134a you will need a different pressostat because R134a works at a higher pressure, the one from a 306 should be fine. You will also need to change all of the 'O' rings in the system to HNBR ones. You'll be fitting a new receiver/dryer anyway. An R12 compressor will be fine with R134a, as will the evaporator and condensor.

 

HTH

 

Josh

[ifcho 0]

OK . It doesn't look too hard..but I think I will leave it as a project for the next summer.

 

Do you know if there is a way to test if the evaporator is OK? As it is broken, I ain't gonna give peugeot 600 Euro for it...

[Ryan 99]

They're generally pretty strong, and being hidden away inside the dash they don't get knocked about much. The only sure way to test it is to take to an aircon specialist. They will hook it up to a machine that pressurises it with nitrogen and checks for leaks.