MrTube
08-11-2016, 01:27 PM
Hey guys,
There's something I'm not quite grasping and am hoping someone out there knows the answer.
When a split system using a scroll compressor is installed with the evaporator up in an attic and the condensing unit outside on the ground 20 feet down wouldn't the use of a crank case heater be 100% necessary regardless of lineset length?
I'm asking because it appears most if not all manufacturers say it's not required unless the lineset length is 80' or longer.
On a cooler day where the system has been off and the attic is good and hot from sun loading wouldn't the refrigerant have to migrate to the cooler compressor even with a short lineset?
Why does everyone all of a sudden require a CCH when the lineset hits 80' or longer? Why that magic number? What stops migration in this situation if the lineset is say, 60 feet long?
There's something I'm not quite grasping and am hoping someone out there knows the answer.
When a split system using a scroll compressor is installed with the evaporator up in an attic and the condensing unit outside on the ground 20 feet down wouldn't the use of a crank case heater be 100% necessary regardless of lineset length?
I'm asking because it appears most if not all manufacturers say it's not required unless the lineset length is 80' or longer.
On a cooler day where the system has been off and the attic is good and hot from sun loading wouldn't the refrigerant have to migrate to the cooler compressor even with a short lineset?
Why does everyone all of a sudden require a CCH when the lineset hits 80' or longer? Why that magic number? What stops migration in this situation if the lineset is say, 60 feet long?