[QUOTE]Originally posted by hvac-tech-lane
In the intrest of understanding the refregeration cycle better please explain how a oversized CU would cause high head pressure.
I would say probably because of smaller metering device with smaller evap. that will raise the head a tad higher than a normal matched system. Especially on the older cap tube stuff.
__________________________________________________ _______________________
Experience is a hard teacher because she gives the test first, the lesson afterwards" ~ Vernon Law
"It's what you learn after you know it all that counts." ~ John Wooden
"When the teachers become unteachable we're all in trouble" ~ Mr. Bill
"Remember "Pro" is only a name, it's not always a mindset determined to do everything correctly" ~ Mr. Bill