how much r-134A
#1
how much r-134A
I just changed out my condenser. The guys at the auto hobby shop on naval base are telling me i need to chang out dryer and orfice tube. Do I really need to? Also, do I need to add oil or anything and how much. Also , how much freon do I need? It is getting vacuumed and then adding freon. Any suggestions while I am doing this?
#7
05 RX8 Sold///05 Evo VIII
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There is a sticker on the hood with the correct amount of refrigerant for the system. IIRC it's .9 lbs
You do not want to under charge nor over charge the system.
Please explain how there is no drier accumulator.
You do not want to under charge nor over charge the system.
Please explain how there is no drier accumulator.
#9
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The purpose of a receiver drier/accumulator is to remove moisture from the refrigerant and filter the refrigerant. It also can act as a small storage "tank".
Additionally it protects the expansion valve from letting ice accumulate in the valve itself and creating blockage.
How does ice accumulate in a sealed A/C system? Moisture.
Ever notice de-fogging your windshield automatically turns on the A/C? The system removes practically all moisture of the air being passed through the evaporator by the blower motor. Fog on your windshield is moisture.
Your correct, it doesn't have a separate ("stand-alone drier" if you will).
It has a multi-flow condenser with a modulator which is AKA a receiver-drier.
This modulator ensures only liquid refrigerant is then passed through to the expansion valve. It does filter the refrigerant as well from moisture and contaminants should they exist in the system.
So can I ask again, reworded. How does a system not remove moisture from the system then?![Big Grin](https://www.rx8club.com/images/smilies/biggrin.gif)
OP.
Since you replaced the condenser, you essentially replaced the (receiver-drier) modulator.
The system does not have a FOT (fixed orfice tube) it uses the expansion valve to release high pressure refrigerant into the evaporator. (And its buried by the evaporator core.)
Per the service manual for replacing the condenser. 20ml/20cc/ 0.7fl oz.
Judging from what these "guys" told you I wouldn't think you need to replace the expansion valve. But I need to see the pressure readings and what the car is doing exactly.
Additionally it protects the expansion valve from letting ice accumulate in the valve itself and creating blockage.
How does ice accumulate in a sealed A/C system? Moisture.
Ever notice de-fogging your windshield automatically turns on the A/C? The system removes practically all moisture of the air being passed through the evaporator by the blower motor. Fog on your windshield is moisture.
Your correct, it doesn't have a separate ("stand-alone drier" if you will).
It has a multi-flow condenser with a modulator which is AKA a receiver-drier.
This modulator ensures only liquid refrigerant is then passed through to the expansion valve. It does filter the refrigerant as well from moisture and contaminants should they exist in the system.
So can I ask again, reworded. How does a system not remove moisture from the system then?
![Big Grin](https://www.rx8club.com/images/smilies/biggrin.gif)
OP.
Since you replaced the condenser, you essentially replaced the (receiver-drier) modulator.
The system does not have a FOT (fixed orfice tube) it uses the expansion valve to release high pressure refrigerant into the evaporator. (And its buried by the evaporator core.)
Per the service manual for replacing the condenser. 20ml/20cc/ 0.7fl oz.
Judging from what these "guys" told you I wouldn't think you need to replace the expansion valve. But I need to see the pressure readings and what the car is doing exactly.
Last edited by viprez586; 06-26-2011 at 09:07 PM.
#11
Registered
Isn't the drier part of the receiver-drier pretty much a one-shot dessicant? Removes moisture that entered the system when it was open? After that, there isn't any way for more moisture to get in.
Ken
Ken
#13
Jared
iTrader: (3)
The purpose of a receiver drier/accumulator is to remove moisture from the refrigerant and filter the refrigerant. It also can act as a small storage "tank".
Additionally it protects the expansion valve from letting ice accumulate in the valve itself and creating blockage.
How does ice accumulate in a sealed A/C system? Moisture.
Ever notice de-fogging your windshield automatically turns on the A/C? The system removes practically all moisture of the air being passed through the evaporator by the blower motor. Fog on your windshield is moisture.
Your correct, it doesn't have a separate ("stand-alone drier" if you will).
It has a multi-flow condenser with a modulator which is AKA a receiver-drier.
This modulator ensures only liquid refrigerant is then passed through to the expansion valve. It does filter the refrigerant as well from moisture and contaminants should they exist in the system.
So can I ask again, reworded. How does a system not remove moisture from the system then?![Big Grin](https://www.rx8club.com/images/smilies/biggrin.gif)
OP.
Since you replaced the condenser, you essentially replaced the (receiver-drier) modulator.
The system does not have a FOT (fixed orfice tube) it uses the expansion valve to release high pressure refrigerant into the evaporator. (And its buried by the evaporator core.)
Per the service manual for replacing the condenser. 20ml/20cc/ 0.7fl oz.
Judging from what these "guys" told you I wouldn't think you need to replace the expansion valve. But I need to see the pressure readings and what the car is doing exactly.
Additionally it protects the expansion valve from letting ice accumulate in the valve itself and creating blockage.
How does ice accumulate in a sealed A/C system? Moisture.
Ever notice de-fogging your windshield automatically turns on the A/C? The system removes practically all moisture of the air being passed through the evaporator by the blower motor. Fog on your windshield is moisture.
Your correct, it doesn't have a separate ("stand-alone drier" if you will).
It has a multi-flow condenser with a modulator which is AKA a receiver-drier.
This modulator ensures only liquid refrigerant is then passed through to the expansion valve. It does filter the refrigerant as well from moisture and contaminants should they exist in the system.
So can I ask again, reworded. How does a system not remove moisture from the system then?
![Big Grin](https://www.rx8club.com/images/smilies/biggrin.gif)
OP.
Since you replaced the condenser, you essentially replaced the (receiver-drier) modulator.
The system does not have a FOT (fixed orfice tube) it uses the expansion valve to release high pressure refrigerant into the evaporator. (And its buried by the evaporator core.)
Per the service manual for replacing the condenser. 20ml/20cc/ 0.7fl oz.
Judging from what these "guys" told you I wouldn't think you need to replace the expansion valve. But I need to see the pressure readings and what the car is doing exactly.
#17
In order for the air passing over the evaporator to be cold, the condenser has to remove heat. That obviously is not happening efficiently at idle. If the system has the proper amont of refridgerant then that means that the fans are not pushing enough air over the condenser. When you start moving the air coming in from under the car removes the necessary heat and viola, cold air. Check the refridgerant level, and your fans.
#18
In order for the air passing over the evaporator to be cold, the condenser has to remove heat. That obviously is not happening efficiently at idle. If the system has the proper amont of refridgerant then that means that the fans are not pushing enough air over the condenser. When you start moving the air coming in from under the car removes the necessary heat and viola, cold air. Check the refridgerant level, and your fans.
#19
SARX Legend
iTrader: (46)
Here you go starting threads again on stuff that is already covered many times over.
http://foxed.ca/rx7manual/2003mazdar..._S01_0651.html
http://foxed.ca/rx7manual/2003mazdar..._S01_0651.html
#21
SARX Legend
iTrader: (46)
And why would that happen? Think about it.
My point was to properly trouble the problem instead of asking random people to guess for you. Have you tested anything (fans, refrigerant, etc) according to the FSM? You said you have not had ac is years, was your old condenser punctured or removed completely? Is your radiator clean?
My point was to properly trouble the problem instead of asking random people to guess for you. Have you tested anything (fans, refrigerant, etc) according to the FSM? You said you have not had ac is years, was your old condenser punctured or removed completely? Is your radiator clean?
#22
And why would that happen? Think about it.
My point was to properly trouble the problem instead of asking random people to guess for you. Have you tested anything (fans, refrigerant, etc) according to the FSM? You said you have not had ac is years, was your old condenser punctured or removed completely? Is your radiator clean?
My point was to properly trouble the problem instead of asking random people to guess for you. Have you tested anything (fans, refrigerant, etc) according to the FSM? You said you have not had ac is years, was your old condenser punctured or removed completely? Is your radiator clean?
#23
Registered
Ken
#24
SARX Legend
iTrader: (46)
It's fairly common for the factory fans to just get weak over time. Most don't realize it until they get new fans. If your fans are original then I would suggest replacing them just for good measure considering where you live and how many miles are on your 8.