Posted several times about systems that had high suction and low head. Found out that on the systems with flow raters the installers were leaving out the piston. Still having the problem with txv systems. Went on one the other day and just for s**ts and giggles lowered the blower speed by setting the dip switches. lowered a 4 ton system down to 300 cfm and the pressures went to where they were supposed to be. If only it were that simple, and yes, I put the blower speed back where it is supposed to be.
- posted
17 years ago