Hello
Ive just mounted the system for some testing (i wanted to test the HX's performance) and bah... smth is SERIOUSLY wrong...
The system:
Hello
Ive just mounted the system for some testing (i wanted to test the HX's performance) and bah... smth is SERIOUSLY wrong...
The system:
Ok, some more info
I stage:
10k btu/h tecumesh compressor
R22
-39C SST; -36 to -37C evap temp
~35C condenser outlet temp, dunno the SCT but the TXV is feeded all the time (can hear it)
Im really in some panic, i cant think clar cause i get 10C SCT in the II stage with R22 ! With -35C sst temps on the I stage...
Could i ask for some help, right now i cant think clear, the firt thing ill try to do is give you guys as much data as i can
what is the temperature of the liquid coiming from the ishx on the 2nd stage. i would trust that way more than the sct temperature.
electrical engineering lab rat
As always, there are three important questions involved:
What is the heat load?
How cold do you want it?
Will that be Visa, MC, or Discover Card?
-gary
Are you sure it isn't overcharged? I have seen this with my system; as soon as there is too much refrigerant in the system, the interstage HX fills up and the low stage condensing pressure skyrockets. The interstage HX then acts as a subcooler only.
It sounds to me like the low stage is overcharged. The difference between the high stage SST and the low stage SCT should be about 6-8C. Another possibility would be air in the low stage system.
Remove refrigerant until the difference is 6-8C and let's see how the low stage performs then.
Last edited by Gary Lloyd; 10-27-2003 at 10:32 AM.
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