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CARLYLE COMPRESSOR

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#21 ·
First off, thanks for the manual. I have it in book form, but it is nice to have in pdf.

Second, I am not as familiar with carlyles as I am with copelands. I assumed (yup, you can shoot me) that they were similar in construction, and they are. I wasn't aware that the passage between motor barrel and crank on an 06E was wide open.

If you look at the 06D, you will see a check valve like I was talking about. That will permit the crankcase to pressurize as I was describing.
 
#23 ·
Look at attached drawing and notice (in red) the oil return check valve
This separates the crankcase from the suction in both Carrier and Copeland compressors.
If blowby (past the piston) is occurring the crankcase can pressurize forcing this valve to close which prevents oil from entering crankcase. The crankcase pressure will be higher than suction, a bad thing. Changing an oil pump in this case is a waste of time. If you check crankcase against suction you will find if this is the case, an easy check to do!
 
#24 ·
On most of the carlyle oil failures that I've seen Have been from excessive rod bearing wear as this is the beginning of the oil circuit. You can usually see alot of oil spray in the sightglass with a good flashlight. excessive floodback can wash out the oil and damage the bearings. I'd startn there
FIRST.
 
#25 ·
rocket said:
Look at attached drawing and notice (in red) the oil return check valve
This separates the crankcase from the suction in both Carrier and Copeland compressors.
If blowby (past the piston) is occurring the crankcase can pressurize forcing this valve to close which prevents oil from entering crankcase. The crankcase pressure will be higher than suction, a bad thing. Changing an oil pump in this case is a waste of time. If you check crankcase against suction you will find if this is the case, an easy check to do!
Click to expand...
Thanks for backing me up. I was starting to think I was alone.
 
#26 ·
#27 ·
Statement from Carlyle service rep. "Check the difference between the crankcase and the suction pressure. The crankcase pressure should be slightly lower than the suction on most semi-hermetic reciprocating compressors. The oil return check valve is free floating and won’t function if crankcase and suction pressure are the same. The Carrier/Carlyle O6E is one exception to this with a higher crankcase pressure but should not be more than 2 psig higher."
 
#28 ·
Airmechanical said:
better look for other backup, look on page 44 http://www.carlylecompressor.com/Fi...com/Files/Carlyle_Compressor/Local/US-en/documents/020-611_withCover_LOWRES.pdf

under the heading of A,B,and C

you will notice the low side connection is the same as the low side oil safety connection, as well as the oil (sump) fill port

and what is behind those fittings, (the crankcase)



.
Click to expand...

On a normally operating system, the two will be approximately equal. Crankcase typically a bit lower. Thus, normally we can get away with assuming that they are the same.

Since this is a question about a system that is NOT operating normally, we must look for the abnormal condition.

Checking the differential between actual suction and actual crankcase pressure is a simple test and will reveal a defect in the operation that could otherwise be missed.
 
#29 ·
this is getting ridiculous here.

This is about finding the correct ways and reasons to determine why an oil pressure safety switch is tripping. NOT TO PAT YOURSELF ON THE BACK FOR BEING RIGHT> And that is to both of you.

The guy is having trouble and wants to learn what is happening to his problem.

So. Crankcase pressure, subtracted by oil discharge pump pressure. Carlyle or Copeland or any other damned compressor.

If the crankcase becomes pressurized due to blow by, it will then cause the pressure to reduce the net pressure of the two subtracted. If it becomes too great, the oil switch will no longer be seeing the differential and trip.
 
#30 ·
had he checked for blow-by he wouild not have bought a new oil pump, saving money as he can't return the oil pump, which is why some suggested he checked crankcase against suction. Only one person insisted on being right, the one that insisted and argued that suction and crankcase are the same pressure. Others tried to get this back on track by suggesting a bit of valid trouble shooting (checking for blow-by)

(if suction and crankcase are the same then what is blow-by)
 
#31 ·
iceboyz said:
WELL YOU WERE RIGHT ,REMOVED OLD PUMP ,VEY CLEAN INSIDE NO PLAY,TOO MUCH OIL TOOK OUT A QUART,REPLACE WITH NEW PUMP ,22LBS OIL PRESSURE FOR APROX 20 MINUTES MADE ICE AND SLOWLY FADED BACK TO 5 LB PRESSURE !!!WENT OFF ON FAILURE.... CANT UNDERSTAND VALVED OFF SUCTION PULLED DOWN 14INCHS FAST BUT THE VALVES DID NOT HOLD THERE SLOWLY CREAPED UP!!!COMPRESSOR TIME YOU THINK(I GUESS )
ANY IMPUT.....
THANKS...............................
Click to expand...
I would start there.
 
#32 ·
your right DDDD, he gets the pat on the back, but you can get off your highhorse as well

my post's were my way of trying to understand how a suction tap and an oil pressure tap can have 2 different pressures

but since you put it that way, i guess now i don't care that much:(



.
 
#33 ·
If you work on carlyle compressors on a regular basis then you have a supply of valve plates on your truck. Pull the heads and see what condition the valves are in. In most cases you can go ahead and dig out the broken pieces.
 
Discussion starter · #38 ·
carlyle problems cured

THIS IS THE BEST SITE EVER!! THANKS FOR ALL THE FEEDBACK,REPLACED COMPRESSOR ON WEDNESDAY ,MACHINE RUNS LIKE A CADI!!!!!
AND I HAVE A SPARE OIL PUMP I WILL PROBABLY NEVER USE.
THANKS AGAIN FOR ALL THE EXPERTISE............
 
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