Duracool Dash AC

[kstockwell]

I bled some out (i did not have my gauge, so i just used an old nozzle and gave a few short squeezes) and now it runs all the time

thanks Bill, sorry it took a year for me to take your advice. I hadn't really run the buggy much since then.
--
1978 Kingsley
Putney VT

 

[john r. lebetski]

You should use Real gauges and check high and low side. You may have had it cycling off the temp switch on the evaporator. Now it’s running
continuous because evap temp seitch not satisfied. The suction line needs to be cold all the way back to the compressor. Or compressor may die an
early demise
--
John Lebetski
Woodstock, IL
77 Eleganza II

 

[78gmcroyale]

What should the high and low pressures be?Sent from my U.S.Cellular© Smartphone
-------- Original message --------From: "John R. Lebetski" Date: 7/7/21 6:32 PM (GMT-06:00) To: gmclist Subject: [GMCnet] Re: Duracool Dash AC You should use Real gauges and check high and low side. You may have had it cycling off the temp switch on the evaporator.  Now it’s runningcontinuous because evap temp seitch not satisfied.   The suction line needs to be cold all the way back to the compressor. Or compressor may die anearly demise -- John LebetskiWoodstock, IL77 Eleganza II_______________________________________________GMCnet mailing listUnsubscribe or Change List Options:

 

[john r. lebetski]

I don’t know. I have R12. I only know what Emery wrote up. I do know I would not trust the cheap hose can ones. They are paint by color, not even
paint by number. And give no indication of high side alerts.
--
John Lebetski
Woodstock, IL
77 Eleganza II

 

[Ken B]

OK, with Duracool the pressure on the high side is seldom a problem unless you are grossly over charged. I go by the guide lines that 2.5 to 3 cans
is what you need in a GMC. The low side pressure you should see is 20 to 25 at around 1500 to 1600 engine rpm. The final thing I do is check the
temperature of the air in the vent or on the output side on the evaporator. I use a cheap $10.00 meat thermometer from Walmart.

If you have got three cans in it you are probably over charged. As you increase the charge you also increase the Duracool evaporation temperature and
the air temp leaving the evaporator. I shoot for an evap and air temp of 39 to 40 degrees leaving the evaporator.

I do the same on R-134 cars and r-22 houses. The pressures are slightly higher but the 39 to 40 evap temps are just fine and what you want.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana