Siemens SED2-4/32B - Page 122

122/126
Siemens Building Technologies SED2 variable speed drives CM1U5192en
HVAC Products Appendix 01.2002
For pumps (or fans): The process of starting an additional motor with constant speed to
increase power.
Universal serial interface protocol.
Variable speed drive.
Star condensator.
Staging
USS
VSD
Y-condensator