06/24/05 ABB ACH550 Variable Frequency Drive Product Bulletin [download] (pdf, 2.08 mb) 12/10/04 Clearwater Systems - Dolphin, Chemical Free Water Treatment [download] (pdf, 105 kb) 08/26/04 ABB ACH550 Specification [download] (doc, 75 kb) 08/26/04 ABB ACH550 Unique Features [download] (doc, 42 kb) 08/26/04 ABB ACH550 Communication Strategy [download] (doc, 29 kb) 06/10/04 Efficiency of AC Drive Systems [download] (doc, 56 kb) 06/10/04 ABB Inverter Duty Motor Specification [download] (doc, 56 kb) 04/21/03 iLABS Seminar Announcement "Designing a Lab Building" April 29, 2003 - Los Angeles, CA Here you can find descriptions of the topics to be covered, a schedule of events, and a registration form. [download] (pdf, 100 kb) 01/17/03 Baltimore Aircoil Announcement "HXV Wins 2003 AHR Expo Innovation Award" [download] (doc, 249 kb) View the announcement on the AHR Expo website. 12/20/02 Carel UltimateSteam Design / Specification Manual [download] (pdf, 398 kb) 12/04/02 Petra Package Unit Replacement Photographs taken of a package unit replacement project at an office building in Foster City. Petra built a direct replacement for an old 40-ton Carrier package unit. The new unit dimensions matched the existing roof curb and duct openings exactly. Old Unit 1 (jpg, 982 kb) Old Unit 2 (jpg, 944 kb) Crane Lift 1 (jpg, 834 kb) Crane Lift 2 (jpg, 615 kb) Unit Placement (jpg, 982 kb) New Unit Installed (jpg, 371 kb) 10/29/02 Petra APS Chiller Catalog [download] (pdf, 30.3 mb) 10/29/02 Petra APX Chiller Catalog [download] (pdf, 24.2 mb) 09/30/02 Baltimore Aircoil Product Report "Advanced Coil Technology Reduces Fouling Tendency" [download] (pdf, 847 kb)

.