Help Identify Different AC unit models?
#1
Help Identify Different AC unit models?
So I just realized there are 2 different version AC units. BUT i cant figure out which one comes in which model/car/year or if that is even relevant..
here are the different units...
Unit #1
Note- the top "rectangle"
Unit#2
Note- this top rectangle has multiple steps..
What is the difference between these units? which came in what model etc?
I've looked in 6 different cars, 5 are 93s.
the only thing I could make sense of is the ones that had unit #1 did not have sunroofs, and the ones with unit #2 had sunroofs...
But, that doesnt make sense to me why a sunroof would determine a different A/c unit.....
here are the different units...
Unit #1
Note- the top "rectangle"
Unit#2
Note- this top rectangle has multiple steps..
What is the difference between these units? which came in what model etc?
I've looked in 6 different cars, 5 are 93s.
the only thing I could make sense of is the ones that had unit #1 did not have sunroofs, and the ones with unit #2 had sunroofs...
But, that doesnt make sense to me why a sunroof would determine a different A/c unit.....
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Beans912 (08-06-23)
#4
FD Project
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There 2 different a/c systems.
1. Factory installed Nippon Denso units.
2. Port installed a/c that use the Mana System.
None of the parts are interchangeable as thread size and pitch are different on compressor, dryer, evaporator and condenser.
You can get most replacements parts for the Denso system but not for the Mana one.
1. Factory installed Nippon Denso units.
2. Port installed a/c that use the Mana System.
None of the parts are interchangeable as thread size and pitch are different on compressor, dryer, evaporator and condenser.
You can get most replacements parts for the Denso system but not for the Mana one.
Last edited by BLACK MAMBA; 05-14-13 at 03:48 AM.
#5
Resistance Is Futile
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There are two sure fire ways to tell if you have a mana or denso system. Neither of which can be done by looking at the outside of the evap's box unfortunately.
1. Measure the inlet and outlet ports of the evaporator:
M14x1.5 | 9/16x18 inlet and 7/8-14 outlet = Denso
M16x1.5 inlet and M22x1.5 outlet = Mana
2. Remove the evaporator from the enclosure box and take a look at the expansion valves:
Denso looks like this:
Mana looks like this:
Msg me if you need any more information. I've got a very informative thread with lots of pics going on another forum but I don't want to post the link here because I'm not sure if that would be breaking any rules.
Lane
Oh and redlightrich & FC3S1991 are correct when dealing with LHD spec FDs imported to the USA. Mana systems were installed on US soil to reduce levies / taxes when importing some FDs to the USA. I believe we're the only country that had to deal with that though...
1. Measure the inlet and outlet ports of the evaporator:
M14x1.5 | 9/16x18 inlet and 7/8-14 outlet = Denso
M16x1.5 inlet and M22x1.5 outlet = Mana
2. Remove the evaporator from the enclosure box and take a look at the expansion valves:
Denso looks like this:
Mana looks like this:
Msg me if you need any more information. I've got a very informative thread with lots of pics going on another forum but I don't want to post the link here because I'm not sure if that would be breaking any rules.
Lane
Oh and redlightrich & FC3S1991 are correct when dealing with LHD spec FDs imported to the USA. Mana systems were installed on US soil to reduce levies / taxes when importing some FDs to the USA. I believe we're the only country that had to deal with that though...
Last edited by HalfSpec; 05-14-13 at 08:08 AM.
#7
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The tourings got the Nippon systems R and base cars got the MANA. There's where your sunroof/no sunroof differences came from. The compressor itself is the same between both systems, just everything else is different. There are also slight differences in the evap core units between 93 and 94+ cars to deal with the airbags but it is possible to put a 93 evap core into a 94+ car with some modifications.
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#11
Resistance Is Futile
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Lane
#12
Full Member
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In an effort to clear things up, I want to show the build sticker on the right side door pillar. It clearly shows A/C
N
My R2 is exactly this way too. When I order belts using vin, they come wrong. Leads me to believe what I thought.
Both these cars do have A/C in them though.
N
My R2 is exactly this way too. When I order belts using vin, they come wrong. Leads me to believe what I thought.
Both these cars do have A/C in them though.
#13
EGTs of Doom
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The drier is also different on the two systems and much easier to check than taking the cooling unit apart to view the expansion valve. There is a sight glass on the piping going into the drier for the denso unit. If there's no sight glass, then you are looking at a mana unit.
If anyone is interested, I have a complete MANA system for sale...
If anyone is interested, I have a complete MANA system for sale...
#14
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You can get most replacements parts for the Denso system but not for the Mana one.
#15
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Denso driers are errywhere. Try ACDELCO Part # 1510785.
Now...if you meant to say MANA driers can't be had, then yeah, that's a true statement.
#16
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If there's no sight glass then you're looking at a MANA 1995 car with R-134a from the factory.
If the sight glass is on an aluminum block that bolts directly to the drier you have a Denso system.
If the sight glass is in the line leading from the drier, but not ON the drier, then you have a MANA system.
I have no idea how they configured the sight glass for an R-134a Denso system, or if they ever even made such a critter for North America....1995s are rare enough as it is.
#17
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The only consistent ways I've seen for verifying what evaporator is installed is by getting dirty and using one of the two techniques I posted above. To my knowledge, there is no sure fire way to tell which is which by identifying external features on the evaporator box. It would be nice if it turns out there's an easier way though, so I'll have to follow this thread closely
I dunno who ZTX is/was but I sure would like to find out. Their stickers are on the condensers too.
#19
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The other fuzzy memory that's in my head is that the MANA thermoswitch has 2 wires leading to it and the Denso switch has 4.
#20
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I looked under the glove and saw the MANA sticker. No removal of ANYTHING
Just for reference: '95 PEP
My dryer did not have a sight-glass and it was black.
My stock refrigerant was for R134a
Just for reference: '95 PEP
My dryer did not have a sight-glass and it was black.
My stock refrigerant was for R134a
#21
Rotary Enthusiast
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I have a 94 touring and was told they came with Japan Denso system. Somebody snaked my line and I've been trying to get it back together. I bought two lines and now two dryers that are wrong after reading this post I can now see I have a Mana system or dryer setup.
It looks like I need a working Mana dryer and a condenser line anybody?
Before Picture of my car with AC
After Picture trying to piece it back together. I bought this dryer from Ray who has them specially made for I believe a denso system but I can now see it's wrong for my car.
Denso dryer system
Mana dryer system
It looks like I need a working Mana dryer and a condenser line anybody?
Before Picture of my car with AC
After Picture trying to piece it back together. I bought this dryer from Ray who has them specially made for I believe a denso system but I can now see it's wrong for my car.
Denso dryer system
Mana dryer system
#23
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I'm in the same I-need-a-drier quandry, and I'm working on a solution. I have almost all the parts needed, but I'm still waiting on one to come in. Once I have everything together, I'm going to tear my system apart and confirm that it will all work. It will solve your need for a line as well as your need for a drier.
The driers Ray was having made were for the MANA system. I spoke to him last week and he can't get them from Mazda and he can't get any more made. The Nippondenso system driers can be bought at any auto parts store since they were used on 3 billion different models.
#25
Make an assessment...
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Does anyone know if you can use Denso lines with a MANA evaporator?
I pulled out my AC system back in 2008 when I installed my VMIC and I've been trying to install it again off and on for the last 3 years. I've finally gotten to where I'm making some headway but I'm running into issues getting lines to work.
My car came with a MANA system but you can only get Denso dryers now. If the high pressure lines from the Denso system work with the MANA evaporator (I'm really just concerned about the high pressure fitting on the evaporator), I can finish this install.
And if it works I'll be looking for a couple Denso lines. If not, I'll be looking for a whole Denso system.
I pulled out my AC system back in 2008 when I installed my VMIC and I've been trying to install it again off and on for the last 3 years. I've finally gotten to where I'm making some headway but I'm running into issues getting lines to work.
My car came with a MANA system but you can only get Denso dryers now. If the high pressure lines from the Denso system work with the MANA evaporator (I'm really just concerned about the high pressure fitting on the evaporator), I can finish this install.
And if it works I'll be looking for a couple Denso lines. If not, I'll be looking for a whole Denso system.