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Author Topic: Aircon overhaul?  (Read 10376 times)

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cdx25

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Re: Aircon overhaul?
« Reply #30 on: 19 April 2007, 15:33:20 »
>> Well you won’t get it on with the "ECO" switch on, "mechanic" says "he did not know anything about that".  

On some cars the ECO button reduces the duty cycle of the AC compressor to save fuel, so they might have thought ECO did that as it can be a way of introducing the gas at a slower rate.  (One of those ideas thats great in theory but in practice doesnt always work like that...)

Knowing what the Omega ECO switch does is kinda important though as its different!  That must have taken ages of charging with nothing being drawn in after the first few grammes...  Wups.  No wonder there was much head scratching.

Jon
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Marks DTM Calib

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Re: Aircon overhaul?
« Reply #31 on: 19 April 2007, 16:15:42 »
The Omega aircon doesn't vary its duty cycle (not seen one that does that since the R12 stuff), it has a variable squish plate internal to the pump ......

Why would any aircon person work on aircon with eco enabled.....surely you want to monitor the high side pressure on max cool....
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Kevin Wood

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Re: Aircon overhaul?
« Reply #32 on: 19 April 2007, 16:33:30 »
Does anyone know what the variable squish plate does / how it works?

If doesn't get any feedback of the car's internal temperature or the demand for cold air so does it just maintain a constant refrigerant flow rate / pressure difference regardless of RPM, temperature, etc?

Kevin
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cdx25

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Re: Aircon overhaul?
« Reply #33 on: 19 April 2007, 17:02:12 »
>> The Omega aircon doesn't vary its duty cycle (not seen one that does that since the R12 stuff), it has a variable squish plate internal to the pump ......

Sorry - I should have said 'other' and 'old' cars in my original post!  Wasnt suggesting the Omega did this.
 
>> Why would any aircon person work on aircon with eco enabled.....surely you want to monitor the high side pressure on max cool....

Some techs take the view that you stick (a non omega type) eco button on to do the charging at a slower rate but if you are charging with gas only I cant see how this matters as there are other limiting factors to the rate of on-gassing.  So I agree, no point.

Jon
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Marks DTM Calib

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Re: Aircon overhaul?
« Reply #34 on: 19 April 2007, 17:13:47 »
Poor training I guess......the gas is only going to go in as fast the cannister etc will allow.....unless you turn it upside down to get liquid in but, I guess you risk buggering the pump then if its running....

Which reminds me, need to get a condenser for my V plate and get it sorted before the temp goes up much more.....
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Bo Bo

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Re: Aircon overhaul?
« Reply #35 on: 19 April 2007, 17:24:13 »
Well I went to Kwikfit & was pretty impressed.
The guy seemed to know his stuff & explained the process as it went through (even though I didn't really want to know).
There was only 150g in mine & very little oil, it's freezing now 8-)

Actually he said his BMW takes 2000g as opposed th the Omega's 950 & has a fridge in the rear armrest  :-?
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Gaffers

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Re: Aircon overhaul?
« Reply #36 on: 19 April 2007, 18:11:41 »
Quote
...Actually he said his BMW takes 2000g as opposed th the Omega's 950 & has a fridge in the rear armrest  :-?

Dont forget the glove box cooling vent on the meegas (as long as you open it)

For longer picnic drives I keep a AC cooler box on the back seat plugged into the rear cigarette lighter port...  8-)
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TheBoy

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Re: Aircon overhaul?
« Reply #37 on: 19 April 2007, 18:51:54 »
Quote
Well I went to Kwikfit & was pretty impressed.
The guy seemed to know his stuff & explained the process as it went through (even though I didn't really want to know).
There was only 150g in mine & very little oil, it's freezing now 8-)

Actually he said his BMW takes 2000g as opposed th the Omega's 950 & has a fridge in the rear armrest  :-?
Which Sh!t F!t did you go to, might take tractor there. Not sure if I have a leak - I am undecided if its cold due to speed, or actually (slightly) chilled....
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Bo Bo

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Re: Aircon overhaul?
« Reply #38 on: 19 April 2007, 18:56:15 »
Quote
Quote
...Actually he said his BMW takes 2000g as opposed th the Omega's 950 & has a fridge in the rear armrest  :-?

Dont forget the glove box cooling vent on the meegas (as long as you open it)

For longer picnic drives I keep a AC cooler box on the back seat plugged into the rear cigarette lighter port...  8-)
Haven't got one in mine, think it must have been done away with on the mini-facelift  :-/ used to use it on my '95...
« Last Edit: 19 April 2007, 18:57:04 by paulmccristall »
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Bo Bo

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Re: Aircon overhaul?
« Reply #39 on: 19 April 2007, 18:58:51 »
Quote
Quote
Well I went to Kwikfit & was pretty impressed.
The guy seemed to know his stuff & explained the process as it went through (even though I didn't really want to know).
There was only 150g in mine & very little oil, it's freezing now 8-)

Actually he said his BMW takes 2000g as opposed th the Omega's 950 & has a fridge in the rear armrest  :-?
Which Sh!t F!t did you go to, might take tractor there. Not sure if I have a leak - I am undecided if its cold due to speed, or actually (slightly) chilled....
My local one, they've got a new m/c that checks pressure & for leaks & won't re-gas if it fails....
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TheBoy

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Re: Aircon overhaul?
« Reply #40 on: 19 April 2007, 19:38:41 »
Quote
Quote
Quote
...Actually he said his BMW takes 2000g as opposed th the Omega's 950 & has a fridge in the rear armrest  :-?

Dont forget the glove box cooling vent on the meegas (as long as you open it)

For longer picnic drives I keep a AC cooler box on the back seat plugged into the rear cigarette lighter port...  8-)
Haven't got one in mine, think it must have been done away with on the mini-facelift  :-/ used to use it on my '95...
I think the glovebox a/c has been removed from later cars - neither my MV6 nor the tractor have it, both 98MY
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Andy B

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Re: Aircon overhaul?
« Reply #41 on: 19 April 2007, 21:51:19 »
Quote
.....
 think it must have been done away with on the mini-facelift  :-/ used to use it on my '95...

It was for some strange reason. I used to like the that feature in my Senator (when the A/C worked  ;) )
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gofwb

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Re: Aircon overhaul?
« Reply #42 on: 20 April 2007, 04:54:52 »
 :) Got mine back from Kwikfit this time no problems, mine is also now freezing, just need some hot weather in the frozen north to take advantage of it.

Frank.
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Marks DTM Calib

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Re: Aircon overhaul?
« Reply #43 on: 20 April 2007, 04:56:06 »
Quote
Does anyone know what the variable squish plate does / how it works?

If doesn't get any feedback of the car's internal temperature or the demand for cold air so does it just maintain a constant refrigerant flow rate / pressure difference regardless of RPM, temperature, etc?

Kevin

It trys to maintain a constant pressure/difference in the coolant lines.......
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Kevin Wood

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Re: Aircon overhaul?
« Reply #44 on: 20 April 2007, 11:13:44 »
Well, I'm off to Kwik Fit with mine at lunch time. We'll see what happens.

Kevin
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