This past Tuesday, DesignTech participated in the witness test and demonstration of the modular chillers for an undisclosed interiors project in Washington, DC. DesignTech served as the owner's representative; verifying that the system met the design specifications. The test took place in Sparta, Wisconsin at the Multistack chiller manufacturing facility.
The manufacturer demonstrated the proper operation and startup of the eleven chiller modules and two end suction chilled water pumps. The Multistack facility in-house tests their equipment with a hydronic system capable of testing three of the 30-ton modules at once. The performance testing was completed successfully; with each module proving the nameplate data to be accurate. The chillers were specified with complete factory controls that were complete at the time of the testing. The completion of the controls installation allowed the factory to demonstrate the sequences of normal operation as well as a myriad of failure condition responses including but not limited to:
- Power source out of phase
- Circuit failure(s)
- High head pressure condition at compressor
- Loss of flow to module
- Loss of leaving chilled water temperature sensor input (fail to run sequence)
- Loss of pump drive control
- Primary chilled water pump failure
Multistack did an excellent job in their demonstration and their product line is a testament to their willingness to customize equipment for specialized applications. Stay tuned for to see this modular chiller at work once it is shipped to Washington, D.C.
