runmc what HW are you planing on taking this for a rid with my man??
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runmc what HW are you planing on taking this for a rid with my man??
Hi Run,Quote:
Originally posted by runmc
My only problem with your solution is that my sensor is buried inside of my cacoon. I would have to distroy my interstage insulation to get it out.
You can probably order another sensor from Johnstone. They carry the Ranco TC controllers.
But since it is buried in the insulation, you do not wish to try to employ a resistor in the sensor circuit? Gee, a lot times I feel invisible, here. :p:
Maybe this sounds too easy for me, because I have a bunch of resistors of all values, in my kit. I'll likely be converting my cascade from R-23 to R-1150, with R-404 in my first stage and will probably experience the same problem (unless I just move my sensor, like Gary suggested, since my sensor location is serviceable... hehehehe :D ), and I'll give the results. But you will probably have your situation remedied, by then.
Cheers!
To you adding a resistor may be simple. For me, that means figuring something else out.:( My poor old brain needs a rest. It took me a week to hook the dang thing up in the first place and I had two of the best helping me... You and Chilly1:)Quote:
Originally posted by herefishy
Hi Run,
You can probably order another sensor from Johnstone. They carry the Ranco TC controllers.
But since it is buried in the insulation, you do not wish to try to employ a resistor in the sensor circuit? Gee, a lot times I feel invisible, here. :p:
Maybe this sounds too easy for me, because I have a bunch of resistors of all values, in my kit. I'll likely be converting my cascade from R-23 to R-1150, with R-404 in my first stage and will probably experience the same problem (unless I just move my sensor, like Gary suggested, since my sensor location is serviceable... hehehehe :D ), and I'll give the results. But you will probably have your situation remedied, by then.
Cheers!
If you don't think it would be too complicated, and you already have it figured out, well then I'm game. Get yours working and then I'll do mine.:D
Simple enough..;)
Just the regular old stuff :(Quote:
Originally posted by paul007
runmc what HW are you planing on taking this for a rid with my man??
Sounds like Gary solved your problem :) ... and couldn't you still utilize the buried sensor for the "true temp" of the HX?Quote:
Originally posted by runmc
At this point, I don't even know if they're talking about my controller. LOL :D
I'm was using my contoller (Ranco) to turn on the low stage when the first stage got to -30. It had a max of a 1F -30F degree differential, so I had it set to shut the low stage back off at 0.
On the box it says " Single stage with sensor range: -30F to +220F" -- Output SPDT relay "
The problem is that the controller turns the low stage off when temperature goes below -30F
The controller operates in two modes - heating and cooling. we had it operating in the heating mode.
Are you using the Ranco controller in heat mode so as to get the largest Temp differential? :confused:
A temp controller in cooling mode turns on a compressor if whatever we are cooling gets warm. We want to do the opposite here, turning on the low stage compressor when the interstage gets cold.
Bill you have to think backwards to figure that one out. LMAO:DQuote:
Originally posted by Hobocrow
Sounds like Gary solved your problem :) ... and couldn't you still utilize the buried sensor for the "true temp" of the HX?
Are you using the Ranco controller in heat mode so as to get the largest Temp differential? :confused:
The reason you use heat mode is because - You have a set point on the controller - the set point is where you want the second stage to turn off. Then you use the differential setting to tell the second stage when to turn on. The reason you would want it to turn off is because the first stage is letting the interstage get too hot.
Using 0 as you set point(set point is where the controller turns the second stage off) draw yourself a chart. Moving upward on your chart would be the cooling mode. +1 +2 +3 and so on. Moving downward on the chart from 0 would be the heating mode -1 -2 -3 and so on.
Think about it. If you have it set in the heating mode as the interstage gets colder the controller turns the low stage on as the interstage gets warmer the controller turns the low stage off.
If you were operating in the cooling mode it would be opposite.
That's how I use the controller in my application. If there is another way, let me know.
In the heating mode, if your set point is 0, that's when low stage will cut off and you differential is set at -20 that is when the low stage will come on The differential range can be set up from1 -30 degrees
I had my setpoint at 0 and the differential set at -30
To my way of thinking, if you were operating in the cooling mode and your setpoint was 0 then the low stage wouldn't turn on untill the controller reached lets say +20, by then my friend, you would be :banana: :banana: :banana: :banana: out of luck
Did that make one bit of sense???
:confused:;)
Ron, Looks like I should have posted that question over in the Easter Contest forum! :D :D
I understand what you just explained , you did it very well, but I don't get it yet! Sometimes I'm a real Bonehead .... :) Off to make some charts and do some research .....
Nice dude.... -100c that would be something.
Quote:
Originally posted by Hobocrow
I understand what you just explained , you did it very well, but I don't get it yet!
In *COOLING* mode the compressor would be turned ON with a rise in temperature. As the (interstage) warmed, the compressor would turn ON with a thermostat configured for *cooling*.
This is undesireable, because when the interstage gets (too) warm, we want the interstage to turn *OFF* in order to protect the system in an overload or fault situation.
In *HEAT* mode, the compressor is turned OFF with a *rise* in temperature (in order to protect the system). Accordingly, when the interstage temperature reaches the LOW setpoint (of the controller), the compressor will then be energized when the interstage is at a desireable (cold) temperature.
Cheers!
Good explanation Herefishy!!:D
You summed it up nicely, and said it a way, that a first timer could understand.;)
I read about using ethylene and propane.
A guy I know has a store and sells all sorts of consumer electronics (also fridges :D ) and repairs them.
I don't know anymore what stuff he used those day's. I know it isn't for sale anymore due to cfk's. But I know it didn't burn when you lighted a fire on it.
With propane and ethylene in my system, I wouldn't even feel safe when smokign a cigaret in front of my pc :D
you never know, a leak kan happen.
are these things relevant? or am I Paranoid? :D
:explode: U know soking will kill U....Quote:
Originally posted by ns_ripper
I read about using ethylene and propane.
A guy I know has a store and sells all sorts of consumer electronics (also fridges :D ) and repairs them.
I don't know anymore what stuff he used those day's. I know it isn't for sale anymore due to cfk's. But I know it didn't burn when you lighted a fire on it.
With propane and ethylene in my system, I wouldn't even feel safe when smokign a cigaret in front of my pc :D
you never know, a leak kan happen.
are these things relevant? or am I Paranoid? :D
Paranoid, Thes esystems have very little gas in them. Only enough to do the job. If you have a larger displacment you can move a larger volume so you need less refrigerant and faster flow rates for cooling so we use larger compressors not for the larger motor but the larger displacment.Quote:
Originally posted by ns_ripper
I read about using ethylene and propane.
A guy I know has a store and sells all sorts of consumer electronics (also fridges :D ) and repairs them.
I don't know anymore what stuff he used those day's. I know it isn't for sale anymore due to cfk's. But I know it didn't burn when you lighted a fire on it.
With propane and ethylene in my system, I wouldn't even feel safe when smokign a cigaret in front of my pc :D
you never know, a leak kan happen.
are these things relevant? or am I Paranoid? :D
Chilly,
I replaced my 1/2hp first stage night before, with that 1hp compressor you pointed out to me.
I saw a degree or two improvement, but more importantly my interstage condensing temps held at -42 in and -42 out. I've finally got it mounted to mobo and first free second I get I'll put a load to it.:D
http://www.teampuss.com/forums/viewtopic.php?t=25
You may want to leave access to the CPEV for fine tuning while under load. Once the system is loaded up monitor the temperature and pressure in the evaporator. If you lower the pressure it will result in a lower temperature until the load balances the amount of refrigerant boiling in the evap. The limiting factor is the temperature of teh second stage compressor, as it becomes unloaded the superheat will increase causing less cooling to return to the compressor.
ah, k.Quote:
Originally posted by chilly1
Paranoid, Thes esystems have very little gas in them. Only enough to do the job. If you have a larger displacment you can move a larger volume so you need less refrigerant and faster flow rates for cooling so we use larger compressors not for the larger motor but the larger displacment.
thnx for clearing that up.
Did you also change the temp controller?? if so, to what? :)Quote:
Originally posted by runmc
more importantly my interstage condensing temps held at -42 in and -42 out. I've finally got it mounted to mobo and first free second I get I'll put a load to it.:
I left the temp controller out. I haven't found a replacement yet, so now I start it manuely and rely on a pressure switch to shut off low stage incase pressure get too high.Quote:
Originally posted by Hobocrow
Did you also change the temp controller?? if so, to what? :)
I got the cascade running last night and fired up my computer. All I could manage was a beautiful dark black screen.:( Haven't figured out the problem yet.:mad:
But I will.;)
I know you will, Bud ... Sorry, bout my bad manners earlier, I didn't memtion that your system looks great ... and it does! :)Quote:
Originally posted by runmc
Haven't figured out the problem yet.:mad:
But I will.;)
In about a week I will have a controller that will do everything you need and display the interstage temps to -40CQuote:
Originally posted by runmc
I left the temp controller out. I haven't found a replacement yet, so now I start it manuely and rely on a pressure switch to shut off low stage incase pressure get too high.
I got the cascade running last night and fired up my computer. All I could manage was a beautiful dark black screen.:( Haven't figured out the problem yet.:mad:
But I will.;)
Let me know where you got it.Quote:
Originally posted by chilly1
In about a week I will have a controller that will do everything you need and display the interstage temps to -40C
It doesn't shut the low stage off if interstage temps drop below -40 does it?
It is a sporlan control, manafactured by carol. you need a hand held programmer to set it up... Looking for a serial connector and software for it now.///
could anyone provide me and other noob members a summarized list of all freons, their rated temp, pressure, oil, and anything else about them...
thanks a lot
If you go to the top of this page, go down to sticky # 5 ( Where to find what you need to know or smth like that) anyways, in there is a post by Russell_hg with a link " P/T " , It everything that you are looking for, I think. :)Quote:
Originally posted by nietsni3
could anyone provide me and other noob members a summarized list of all freons, their rated temp, pressure, oil, and anything else about them...
thanks a lot