yahyaronna
Jun 3, 2012, 04:54 AM
I used to use group of ( constant speed ) primary and ( variable speed ) secondary pumps for air cooled or water cooled chilled water system.
when I can use only variable primary speed pumps instead of this group.
and what deferences on control in both systems.
when I can use only variable primary speed pumps instead of this group.
and what deferences on control in both systems.