Maybe I'm wrong, but I think you want the AOP section of the site.
Guys, Im going brain dead! To decrease superheat, close the TXV or open, Ive been up for a while, going back on this job tomorrow, it is a touchy one, cant quite get it dialed in...please advise
Maybe I'm wrong, but I think you want the AOP section of the site.
"Don't wish it were easier, wish you were better"
For SporlanTEVs-"opening" will reduce superheat. I say opening because what it really does is reduce the spring pressure that is trying to close the valve.
Looking at the stem, from the bottom, righty tighty- lefty loosy. Counter clockwise to reduce the spring pressure and lower superheat.
Don't make big changes- maybe 1/4 to 1/2 turn at a time and let the system settle out. Make a note of what you did, you may want to return to that setting after you find other problems on the job.
In an infinite universe, not only are all things possible, all things are necessary
For all TXV's and superheat adjustment, remember this when adjusting the stem... IN INcreases superheat.
Then do exactly what BDOLIN said concerning making a minor adjustment and monitoring the reaction. I takes time to settle it out.
I dont trust other peoples work when it comes to txvs. A flooded coil can show what looks like superheat. I have had many cases of people giving it a turn and not knowing what they were doing. I always turn the valve in all the way, then back out two turns, if you can shut the liquid off and pump the coil down its better. This will give you a clear coil and accurate SH reading, then adjust as needed, slowly as it takes time
Your procedure should help clear out any liquid in the coil but be careful of the 2 turn rule. Different models from different manufacturers have different numbers of turns to their superheat adjustment. Most valves are set about midpoint at the factory. Turn the stem all the way in and then count the turns when backing out until resistance is felt. Halfway in will usually be a good starting point.
CAUTION; WHEN BACKING OUT STOP WHEN RESISTANCE IS FELT.If you don't you may permanently damage the valve or have a stem in your hand and no charge in the system.
In an infinite universe, not only are all things possible, all things are necessary
My customers run Sporlan and Danfoss valves, never had a problem with starting at two turns out.
Guys, thanks a million, Im sure we all have had those moments when we doubt what we know, this was the case indeed! I needed to lower the suction line temp to bring down the temp, thus lowering the superheat, that is what I went ahead and did. I appreciate all the comments. Blessings to a New Year.
BryantMan