aircon re-gas points

[DaveE320CDI]

Hi, Can anyone please help with the two valves for the air con re-gas? can find one easy but not the other, reason being a friend that will offer to re-gas the car cant find the other valve, cheers Dave

 

[230K]

Hi

On my E300 TD there is a little plastic cover to the top right of the radiator (when looking from front to back), there is a valve under this black plastic cover.

Hope this helps

230K

 

[Andy Wr]

If your friend cant find the valves perhaps he is not the right person to be doing the job, sorry.

 

[wscheffer]

Low Side is on top coming off the dehydrator and the High Side is down by the grill in between the condenser and the dehydrator.

Hope This Helps!

 

[Glenn Smith]

low side down near compressor, high side L/H side of front grill on the condensor.

 

[Andy Wr]

Low Side is on top coming off the dehydrator

The dehydrator is the liquid receiver which contains high pressure liquid refrigerant so it cant be that.

 

[wscheffer]

The dehydrator is the liquid receiver which contains high pressure liquid refrigerant so it cant be that.

dehydrator going to expansion valve is Low Side at least that is the way it is on my car. I did not think that thier would be much change over the years.

 

[DaveE320CDI]

Thanks for the replys chaps! I will pass the info on to him, and Andy its not on my car! I agree if the guy whos doing the job does not know! well i would not trust him either Cheers Dave

 

[Andy Wr]

dehydrator going to expansion valve is Low Side at least that is the way it is on my car. I did not think that thier would be much change over the years.

LOL, the basic principle, the compressor compresses low vapour gas to high pressure gas (now hot) the high pressure high temperature gas passes through the condenser where air is drawn across it cooling the high temperature gas, this infact condenses from a vapour to a liquid, this liquid then travels from the condenser to the dehydrator also known as the drier / receiver still in liquid form, this solid colum of liquid enters the expansion valve which consists of a tint orifice, the liquid by passing through this orifice, the orifice causes a pressure drop and as refrigerant gasses are pressure temperature related this drop in pressure creates a drop in temperature, this pressure dropped refrigerant entering the evaporator is boiled off and evaporates to a low pressure vapour, the low pressure vapour returning to the compressor is compressesd to an high pressure vapour and the cycle begins again .......... well it was when I started in the refrigeration industry 29 years ago.

 

[Andy Wr]

dehydrator going to expansion valve is Low Side at least that is the way it is on my car. I did not think that thier would be much change over the years.

LOL, the basic principle, the compressor compresses low vapour gas to high pressure gas (now hot) the high pressure high temperature gas passes through the condenser where air is drawn across it cooling the high temperature gas, this infact condenses from a vapour to a liquid, this liquid then travels from the condenser to the dehydrator also known as the drier / receiver still in liquid form, this solid colum of liquid enters the expansion valve which consists of a tint orifice, the liquid by passing through this orifice, the orifice causes a pressure drop and as refrigerant gasses are pressure temperature related this drop in pressure creates a drop in temperature, this pressure dropped refrigerant entering the evaporator is boiled off and evaporates to a low pressure vapour, the low pressure vapour returning to the compressor is compressesd to an high pressure vapour and the cycle begins again .......... well it was when I started in the refrigeration industry 29 years ago.

Here is an explanation from a car manual.