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Volvo Condensor

hogtrader on Mon October 01, 2007 6:42 PM User is offline

Year: 1989
Make: Volvo
Model: 740 GLE
Engine Size: 2.3
Refrigerant Type: r-12
Country of Origin: United States

Just purchased a replacement condensor (#24-30049) and noticed that the tube thru the fins is larger than the OE unit which has a much smaller tube making more passes thru the fins. Can I expect the same efficiency from the replacement unit? Even w/r-12 these older 700 series Volvos were not known for optimum cooling...

TRB on Mon October 01, 2007 7:38 PM User is offlineView users profile

According to our suppliers. All the condenser we offer meet the OEM specifications.

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When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

ice-n-tropics on Tue October 02, 2007 11:36 AM User is offline

hogtrader,
You a Harley guy or a livestock guy?
Got plenty of boars and sows available.
Cordially,
Old iV guy

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Isentropic Efficiency=Ratio of Theoretical Compression Energy/Actual Energy.
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2POINTautO on Tue October 02, 2007 1:56 PM User is offlineView users profile

Simply put, less turns equalls less efficiency, much less and no good, close to same number of turns is a maybe.

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Give all the dirty details
and dont forget the LO & HI pressures
Year, Make & Model would be nice too

TRB on Tue October 02, 2007 2:06 PM User is offlineView users profile

Quote
Originally posted by: 2POINTautO
Simply put, less turns equalls less efficiency, much less and no good, close to same number of turns is a maybe.

I disagree with this statement to a point. You could have 20 passages but in your fins per inch were 2. You would have poor cooling compared to a 15 pass and 10 fins per inch.



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When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

JJM on Tue October 02, 2007 3:24 PM User is offline

Ahhh, just take off those "Kerry/Edwards" and "Bush Lied" bumper stickers (still likely in mint condition ever after 3 years), along with the "Free Darfur" and "Cornell" or "UC Berkeley" stickers in the rear window, and you'll be just fine.



Also try to avoid Starbucks and shopping around for arugula and goat cheese - especially if there are Connecticut, Rhode Island or Massachusetts tags on the thing.

Joe

When considering your next auto A/C purchase, please consider the site that supports you: www.ACKits.com


hogtrader on Tue October 02, 2007 10:28 PM User is offline

Livestock...

hogtrader on Tue October 02, 2007 10:32 PM User is offline

I did notice that the core was 1.25 in. thick rather than 1 in. Also the copper construction rather than aluminum. Would the material change matter in some applications? Aluminum dissipates heat quicker. I am going to put a larger aux. fan on it for some ins.

iceman2555 on Tue October 02, 2007 10:36 PM User is offlineView users profile

With adequate air flow the tube and fin condenser should be sufficient for this vehicle..unless....134a is going to be used...or if additional cooling is desired....think a PFHE would work wonders with 12 on this vehicle...however, bet when it was ordered...it was specified for this model and year....???
The only problem seen in the past when comparing tube and fin condensers....the brass and copper replacement units...although they may be the same overall size...tend to have less heat transfer.....and then run into a unit where a PFHE has been replaced with a 6mm Pic brass and copper.....this can cause some massive head aches...trying to get the darn thing to cool at a stop light or driving at slow speeds..... two compressor jobs last week.....same condition....worked acceptable at speed..but would not cool in town.....Honda...new condenser fan.....new condenser......new txv...flush.....recharge to specs....the hold 'kit and kaboodle'.....driving the installer crazy......but......during discussions with the installer....ohhhmmyyyy....a brass and copper.....tube and fin was installed.....said it was a cost issue.....suggested...change the darn thing back to an OE spec'd PFHE and see what happens......yep....two compressors down.....not cooling correctly...yeah right..must the second line stuff......anyway...new condenser was installed....really pissed off a jobber...but hey what the heck....the darn thing worked....cooled great.....but then...suppose it could have been the magic third compressor installation.......

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The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson

TRB on Tue October 02, 2007 10:45 PM User is offlineView users profile

Ice you are being to generic in my opinion. Have you ever seen a PFHE condenser for a 89 Volvo? I'm talking direct replacement not a universal which would need hose changes.

I agree with all your comments by the way. I'm just saying you can not compare components from a Honda to a older Volvo!

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When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

iceman2555 on Tue October 02, 2007 11:25 PM User is offlineView users profile

Understand...but...in the post.....think it said..... however, bet when it was ordered...it was specified for this model and year....???
Never seen a OE PFHE in a older volvo.....but think a universal PFHE would work wonders....with 12 and 134a....those units were small to begin with.....but hey..what the heck...we worked with what we had.....and then...the older ones with the York body shakers......those were the days.....damn...wish I were that young again.....being over 30 is killing me.....lol


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The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson

iceman2555 on Tue October 02, 2007 11:31 PM User is offlineView users profile

TRB...if you have time...go over to ww's place....check the knowledge section....read about how a A/C system works....how refrigerant flows thru the system.....wondering about the 'hot vapor from the evap'......darn...I'm so confused!!!!

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The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson

TRB on Wed October 03, 2007 12:03 AM User is offlineView users profile

I'm not getting into anything that is posted over there. Don't have the time and don't care. Plus it would just create "hot vapor" issues.

Maybe this will help clear things up for you.



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When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

hogtrader on Wed October 03, 2007 7:34 PM User is offline

I agree with your assessment Iceman. I thought about using a PFHE unit but did not want the project of mounting it since I was sticking with R12. I did put one in a GM conversion and rung anothr 5 degrees out of the vent. (Still believe the Volvo units were less than efficient due to smaller evaporators? And that suction hose...gees, what an engineering marvel.) I did return the unit I got. It was fairly heavy copper fin and tube construction, and although it was not the first consideration, priced low to be sure. It had a thicker core which posed a clearance problem with the trans cooler that's sandwhiched btwn the rad and cond. I was concerned about heat transfer via the copper construction and fewer passes with the larger tube, and fins per inch were less than then OE unit. My rudementary knowledge of metalurgy led me to the same conclusion. And everytime I garden-hose the condenser, the unit cools better.
So heat dissipation must be an issue with considering. :-)

A couple more questions for you guys. How much oil do I squirt into the replacement accumulator and condenser? (Just ordered a quart from Tim. Try finding 6 oz. mineral oil locally. :-)) Got nothing measurable out of the condenser, but an oz. out of the suction hose and maybe 2 oz. out of the muffler section. Had not pulled the accumulator yet.

On the hoses, they're at least 12 years old but look great. The oil was clean. Should I just re-use them?

One more...On the discharge line, just before it goes into the evaporator, there is a part that screws into a tap line. It has a black case with 2 white wires. I cannot find it on parts schematics. Is it a high pressure switch? (Tim, if you see this post, let me know if you stock it.)

hogtrader on Wed October 03, 2007 7:39 PM User is offline

BTW;

What gives with the "Kerry Edwards"/Dafur" posting? >

2POINTautO on Wed October 03, 2007 11:58 PM User is offlineView users profile

From what I understand, the old R12 oil will seal the hoses and no need for barrier hoses during a retrofit.

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Give all the dirty details
and dont forget the LO & HI pressures
Year, Make & Model would be nice too

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