FWIW, Scrolls don't equalize pressures. Most manufacturers install hard
start kits on heat pumps and a/c condensers that have a very high
probability of being used on a coil that has an expansion valve on it.



Steve,

From Copeland's website technote on "Compliant Scrolls"...

Single Phase Starting Characteristics:

No start assist devices are ever required, even if a system uses
non-bleed expansion valves. Due to the inherent design of the Compliant
Scroll, the internal compression components always start unloaded even
if the system pressures are not balanced.

I don't doubt that the systems you installed had hard starts...

I just want to know why?

Why wouldn't they just employ bleed TXV's and the standard anti-restart
relay?

Just curious...

Jake