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Charging Cylinders

 
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Old 08-03-2009, 03:08 PM   #1
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Charging Cylinders


Does anyone occasionally use these for small critical charge systems like PTACs, ice machines, window units, coolers, etcÖ?
I have two of the heated Dial-a-Charge models made by Robinair. One is calibrated for R12/22/502 and the other for R134A only. I think I overdid it a bit though by getting the 5 LB sizeÖ I probably would have been fine with the 2.5 LB models.

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Old 08-03-2009, 11:55 PM   #2
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Re: Charging Cylinders


Haven't been anywhere near one of those puppies since working for my Uncle years ago. I just use the digital scale.
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Old 08-06-2009, 07:10 AM   #3
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Re: Charging Cylinders


Never used one just a digital scale
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Old 08-07-2009, 12:26 PM   #4
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Re: Charging Cylinders


i've got an old one that i picked up at an auction years ago,never have used it......
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Old 08-07-2009, 07:27 PM   #5
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Re: Charging Cylinders


Haven't used one since the 80's. But on small systems you can't beat em, more accurate than a digital.
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Old 08-08-2009, 01:36 PM   #6
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Re: Charging Cylinders


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Originally Posted by pipefitter636 View Post
Haven't used one since the 80's. But on small systems you can't beat em, more accurate than a digital.

How small are you talking? I use the scale for 18oz-23oz in Climatemaster untis all the time with great results.
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Old 08-08-2009, 06:46 PM   #7
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Re: Charging Cylinders


Haven't used one of them since the 80's.

A good digital is easier to use. No temp compensation to consider.
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Old 08-08-2009, 07:00 PM   #8
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Re: Charging Cylinders


Got the same one you got, Dumass. Still use it today.
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Old 08-08-2009, 07:06 PM   #9
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Re: Charging Cylinders


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Haven't used one of them since the 80's.

A good digital is easier to use. No temp compensation to consider.
On a cap tube system less than 2lbs...... Don't think I would trust it...... jmo
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Old 08-08-2009, 07:12 PM   #10
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Re: Charging Cylinders


To each his own.

Do reach ins, etc, that take less then 2 pounds, no trouble.

A calabrated digital scale is just as accurate as a charging cyclinder.
And no temp compensation errors.
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Old 08-08-2009, 07:20 PM   #11
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Re: Charging Cylinders


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Originally Posted by beenthere View Post
To each his own.

Do reach ins, etc, that take less then 2 pounds, no trouble.

A calabrated digital scale is just as accurate as a charging cyclinder.
And no temp compensation errors.
Glad I don't do the small sh*t any more....And your right(To each his own.)

Last edited by pipefitter636; 08-08-2009 at 07:37 PM.
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Old 08-08-2009, 08:56 PM   #12
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Re: Charging Cylinders


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Originally Posted by beenthere View Post
To each his own.

Do reach ins, etc, that take less then 2 pounds, no trouble.

A calabrated digital scale is just as accurate as a charging cyclinder.
And no temp compensation errors.
Temperature compensation? Whooh… you have to turn the outer shield to match the reading of pressure gauge on top… not too hard to accomplish.
That's why it's called the Dial-a-charge.
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Old 08-08-2009, 09:39 PM   #13
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Re: Charging Cylinders


Wait until you use it on a system, thatgives you a little trouble getting all of the charge in, when its not running.
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Old 08-08-2009, 10:15 PM   #14
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Re: Charging Cylinders


Thatís why there heated. You just plug them in to a 120V receptacle. This has the same effect as using a tank heater on a 30lb or 50lb cylinder.
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Old 08-09-2009, 12:49 AM   #15
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Re: Charging Cylinders


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Thatís why there heated. You just plug them in to a 120V receptacle. This has the same effect as using a tank heater on a 30lb or 50lb cylinder.
Unless it says Testo on it Beenthere gets a little confused.
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Old 08-09-2009, 05:29 AM   #16
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Re: Charging Cylinders


Quote:
Originally Posted by hvaclover View Post
Unless it says Testo on it Beenthere gets a little confused.
LOL... I understand the word Bacarach too.
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Old 08-09-2009, 05:32 AM   #17
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Re: Charging Cylinders


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Thatís why there heated. You just plug them in to a 120V receptacle. This has the same effect as using a tank heater on a 30lb or 50lb cylinder.
Come back and tell me how mch you like using one, in another 2 years.

I used a 5, and a 10 pound one.

Used them in both summer, and winter.

A digital scale is better, easier, and faster.
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Old 08-09-2009, 09:34 AM   #18
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Re: Charging Cylinders


Okay, but Iíve already had them both for probably six or seven years now. I also own and use a digital scale as well as a digital programmable scale/refrigerant meter, so I use them all.
Iím not trying to convert anyone hereÖ just asked if anyone else used them occasionally for small critical charge systems.

They do have their advantages though. You can fill them in the shop or in the truck and bring them pre-filled to the equipment, so you donít need to carry a digital scale and 30lb cylinder, just the charging cylinder.
You would probably already have your extension cord running your vac pump at the equipment if needed for the heater.
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Old 08-09-2009, 09:58 AM   #19
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Re: Charging Cylinders


I got tired of filling them. Thats time that can be spent doing other things.

Back when I used them. They didin't have digital scales yet(atleast not portable ones).

I did however, discover that they can be a great training aid, when you want to teach someone about saturation_p/t.



PS: When you want to put 4 pounds in the 5 pound cyclinder, and at 3.2 pounds its pressure is equal to the tank your filling from. You are using a recovery machine to remove the vapor to get the rest of the liquid refrigerant in, right?
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Old 08-09-2009, 10:59 AM   #20
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Re: Charging Cylinders


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I got tired of filling them. Thats time that can be spent doing other things.

What...... like watching the micron guage, or smoking a cig.
I did however, discover that they can be a great training aid, when you want to teach someone about saturation_p/t.



PS: When you want to put 4 pounds in the 5 pound cyclinder, and at 3.2 pounds its pressure is equal to the tank your filling from. You are using a recovery machine to remove the vapor to get the rest of the liquid refrigerant in, right?
Isn't that what you are supposed to do
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