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High side service port on the low side

Dereck on Sun July 05, 2009 12:21 PM User is offlineView users profile

Year: 2004
Make: Renault
Model: Laguna
Engine Size: 2200cc
Refrigerant Type: R134a
Ambient Temp: 80
Pressure Low: ~20
Pressure High: N/A
Country of Origin: France

Hi Guys

I had a Renault Laguna come into the shop for an A/C system service and could only find one service port on the low side, no problem I thought as my Robinair machine has an option to only use one service port.

But when I came to hook up my service machine I discovered it was a high side fitting on the suction side of the system, is this normal for systems using only one service port or is it just the French being the French?

Regards

Dereck

Dereck on Wed July 08, 2009 2:56 PM User is offlineView users profile

Hi Guys

I assume by the lack of response it's just the French being the French

Regards

Dereck

TRB on Wed July 08, 2009 4:36 PM User is offlineView users profile

Never worked on one of these but most likely it has an orifice tube before the service port thus making it the high side.

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Karl Hofmann on Wed July 08, 2009 6:23 PM User is offlineView users profile

The service port is on the accumulator... It is pretty much a French thing though I think that there was an Alfa Romeo that used a low side service port as a fuel rail test point

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Dereck on Thu July 09, 2009 2:13 PM User is offlineView users profile

Hi TRB

Quote
Originally posted by: TRB
Never worked on one of these but most likely it has an orifice tube before the service port thus making it the high side.

No orifice tube on this car it has a TXV and the service port was definately the low side.


Hi Karl Hofmann

Quote
Originally posted by: Karl Hofmann
The service port is on the accumulator... It is pretty much a French thing though I think that there was an Alfa Romeo that used a low side service port as a fuel rail test point

Yep the service port is indeed on the accumulator.

Thanks for the replies

Dereck

mk378 on Thu July 09, 2009 4:33 PM User is offline

A low-side accumulator on a TXV system would be another design feature rarely seen outside France.

Karl Hofmann on Thu July 09, 2009 5:10 PM User is offlineView users profile

Hi Dereck.... If we are talking about the Laguna 2 then the expansion is by orifice tube.

The French are really imaginative when it comes to design but their electronics are crap in a way that redefines crap

The only time that I have ever seen an accumulator on a TXV system was on an old Bently Mulsanne turbo, it was a factory fix to prevent liquid refrigerant fom slugging the compressor

-------------------------
Never knock on deaths door... Ring the doorbell and run away, death really hates that!

Dereck on Sun July 12, 2009 5:52 AM User is offlineView users profile

Quote
Originally posted by: Karl Hofmann
Hi Dereck.... If we are talking about the Laguna 2 then the expansion is by orifice tube.

The French are really imaginative when it comes to design but their electronics are crap in a way that redefines crap

The only time that I have ever seen an accumulator on a TXV system was on an old Bently Mulsanne turbo, it was a factory fix to prevent liquid refrigerant fom slugging the compressor

Hi Karl Hoffman

Yes it was a Laguna II and I could have sworn I saw a TVX block up on the firewall, geuss I need to pay more attention.

Regards

Dereck

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