Tigard-Tualatin School District
Twality Middle School Retro-Commissioning
Tigard-Tualatin School District
Twality Middle School Retro-Commissioning
Location: Tigard, OR
Project Size: 125,000 sq.ft.
Project Description: TTSD requested retro-commissioning to determine the best course of action to correct deficiencies and improve efficiencies. Commissioning found improper control device operation due to leaky pneumatic lines, leaky and non-functional steam valves, discrepancies between published and programmed sequences of operations, non-functional control devices, numerous fans that do not shut off with schedule, loose belts, worn sheaves, and other air balance issues.
NWESI Scope: Review existing system documentation and assemble most current information, write and perform functional testing on one of each type of equipment (12 types of air handlers, 10 terminal units, boiler system and associated valves), sample 20% of airflows to determine current state of balance, provide list of issues and recommendations, develop a systems manual to help effectively operate the HVAC equipment and systems.