hello there. I recently purchased a 2001 Audi A8L. was going to check the a/c refrigerant pressures because the a/c does not seem to cool very well. was goingto hook up gauges but found low side fitting to be like the old r-12 systems. Was wondering how would i go about hooking up a normal r-134a gauge. also, what is the capacity of refrigerant this vehicle takes? thanks in advance guys!!!!

 

For the amount of refrigerant there should be a little silver label on the hood that will give you how much refrigerant to use in grams. As for the a/c ports, there shouldn't be an R12 fitting anywhere on that vehicle. Both lines should be under the pleanum on the passenger's side.

 

the high side fitting is on the condenser at the front of the vehicle. the only low side fitting i see is one on the drivers side under the vents .and its not the quick connect type, its a threaded type. I realized it is not r-12 size threads. it is bigger. there are no a/c lines running along the intake plenum on passenger side.

 

Give me your VIN number and i will look it up on elsa web.

 

why would a VIN be needed?

 

Elsa web is an internet world repair manual, you need to input the VIN to get repair information for each vehicle. If you're not comfortable posting it you can send me a PM so i can only see it, then i will post you back where the fittings are.

 

Block diagrams for various flushing circuits
Note[/align]


t
The arrows in the following illustrations indicate the direction of refrigerant flow on flushing (during flushing, the refrigerant flows in the direction opposite to that in air conditioner operation; the high-pressure end of the air conditioner service station is thus connected to the low-pressure connection of the refrigerant circuit to the compressor).



t
The block diagrams illustrate a refrigerant circuit with restrictor and reservoir and a refrigerant circuit with expansion valve, receiver and a second evaporator (optional extra for certain vehicles).



t
Depending on the design of the air conditioner service station, non-return valves may be fitted between the refrigerant circuit and the air conditioner service station (to guarantee the correct direction of refrigerant flow on flushing).



Refrigerant circuit with restrictor and reservoir
Note[/align]


On vehicles with restrictor and reservoir, the restrictor and reservoir are removed and the pipes unfastened to remove the restrictor are connected back together. The pipe connections to the reservoir removed are connected together with two adapters and the charging hose -VAS 6338/31- (from the VW/Audi passenger vehicle adapter set -VAS 6338/1-).





1-
Air conditioner service station



q
With electronics and flushing program, e.g. Air conditioner service station with flushing attachment -VAS 6336- or Air conditioner service station with flushing attachment -VAS 6337-



q
If use is made of an air conditioner service station with no flushing program, the process is to be implemented manually (evacuation, 3x flushing with at least 4 kg of refrigerant each time, extraction of refrigerant again, evacuation).



2-
Refrigerant hose of air conditioner service station



q
From high-pressure end of air conditioner service station (generally red coloured) to connection for low-pressure end of compressor at refrigerant circuit (larger diameter)



3-
Adapter for low-pressure end connection at refrigerant circuit



q
From VW/Audi passenger vehicle adapter set -VAS 6338/1-



4-
Low-pressure end connection at refrigerant circuit



q
At refrigerant pipe from compressor to reservoir



5-
Connection to reservoir



q
At refrigerant pipe from compressor to reservoir



6-
Adapter for bridging reservoir removed



q
Restrictor removed



q
Restrictor removal



12-
Union in refrigerant pipe



q
Screw back together following restrictor removal



13-
Condenser



14-
High-pressure end connection at refrigerant circuit



15-
Adapter for high-pressure end connection at refrigerant circuit



q
From VW/Audi passenger vehicle adapter set -VAS 6338/1-



16-
Charging hose to refrigerant circuit flushing attachment



q
From high-pressure end connection of compressor at refrigerant circuit (smaller diameter) to inlet of refrigerant circuit flushing attachment



17-
Refrigerant circuit flushing attachment



q
Different versions and different design e.g. Refrigerant circuit flushing attachment -VAS 6336/1- or Refrigerant circuit flushing attachment -VAS 6337/1-



q
With filter, inspection port, safety valve, heater, refrigerant vessel etc. (depending on version)



q
Depending on the design of the air conditioner service station and the refrigerant circuit flushing attachment, a non-return valve may be fitted at the outlet of the refrigerant circuit flushing attachment (to guarantee the correct direction of refrigerant flow on flushing).



18-
Refrigerant hose of air conditioner service station



q
From low-pressure end of air conditioner service station (normally blue coloured) to outlet of refrigerant circuit flushing attachment







Refrigerant circuit with expansion valve, receiver and second evaporator
Note[/align]


t
This block diagram shows a refrigerant circuit with expansion valve, receiver and a second evaporator (optional extra for certain vehicles).



t
On vehicles with expansion valve and receiver, the expansion valve is removed and replaced with an adapter. Depending on the vehicle, the receiver is also removed and the pipe connections to the receiver are connected together using two adapters and a charging hose.



t
On vehicles with one evaporator only, the components as of item “16” are not fitted or are not required.





1-
Air conditioner service station



q
With electronics and flushing program, e.g. Air conditioner service station with flushing attachment -VAS 6336- or Air conditioner service station with flushing attachment -VAS 6337-



q
If use is made of an air conditioner service station with no flushing program, the process is to be implemented manually (evacuation, 3x flushing with at least 4 kg of refrigerant each time, extraction of refrigerant again, evacuation).



2-
Refrigerant hose of air conditioner service station



q
From high-pressure end of air conditioner service station (generally red coloured) to connection for low-pressure end of compressor at refrigerant circuit (larger diameter)



3-
Adapter for low-pressure end connection at refrigerant circuit



q
Different versions depending on vehicle



q
From VW/Audi passenger vehicle adapter set -VAS 6338/1-



4-
Low-pressure end connection at refrigerant circuit



q
Different versions depending on vehicle



5-
Adapter for expansion valve removed



q
Different versions depending on vehicle



q
From VW/Audi passenger vehicle adapter set -VAS 6338/1-



6-
Evaporator



7-
Connection to receiver



q
Not fitted on vehicles with a dryer cartridge in the receiver at the condenser or with a receiver installed in the condenser



8-
Adapter for bridging receiver removed



q
Not necessary on all vehicles



q
From VW/Audi passenger vehicle adapter set -VAS 6338/1-



q
For example Charging hose -VAS 6338/31- (from VW/Audi passenger vehicle adapter set -VAS 6338/1-)



10-
Condenser



q
If a receiver with dryer cartridge is fitted at the condenser, the dryer cartridge must be removed (seal receiver at or in condenser again following removal)



q
If the receiver is attached directly to the condenser, the receiver is only to be removed and replaced after flushing



11-
High-pressure end connection at refrigerant circuit



q
Different versions depending on vehicle



12-
Adapter for high-pressure end connection at refrigerant circuit



q
From VW/Audi passenger vehicle adapter set -VAS 6338/1-



13-
Charging hose to refrigerant circuit flushing attachment



q
From high-pressure end connection of compressor at refrigerant circuit (smaller diameter) to inlet of refrigerant circuit flushing attachment



14-
Refrigerant circuit flushing attachment



q
Different versions and different design e.g. Refrigerant circuit flushing attachment -VAS 6336/1- or Refrigerant circuit flushing attachment -VAS 6337/1-



q
With filter, inspection port, safety valve, heater, refrigerant vessel etc. (depending on version)



q
Depending on the design of the air conditioner service station and the refrigerant circuit flushing attachment, a non-return valve may be fitted at the outlet of the refrigerant circuit flushing attachment (to guarantee the correct direction of refrigerant flow on flushing).



15-
Refrigerant hose of air conditioner service station



q
From low-pressure end of air conditioner service station (normally blue coloured) to outlet of refrigerant circuit flushing attachment



16-
Adapter for sealing outlet to second evaporator



q
Only required for certain vehicles with “second evaporator” as optional extra



q
From VW/Audi passenger vehicle adapter set -VAS 6338/1-



17-
Adapter for sealing outlet to second evaporator



q
Only required for certain vehicles with “second evaporator” as optional extra



q
From VW/Audi passenger vehicle adapter set -VAS 6338/1-



18-
Low-pressure end connection at refrigerant circuit to second evaporator



q
Different versions depending on vehicle



q
Only fitted on certain vehicles with “second evaporator” as optional extra



19-
High-pressure end connection at refrigerant circuit to second evaporator



q
Only fitted on certain vehicles with “second evaporator” as optional extra



20-
Adapter for expansion valve removed at second evaporator



q
Different versions depending on vehicle



q
Only required for certain vehicles with “second evaporator” as optional extra



q
From VW/Audi passenger vehicle adapter set -VAS 6338/1-



21-
Second evaporator



q
Only fitted on certain vehicles with “second evaporator” as optional extra

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