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Solutions Anwendungen
Enhancing DOAS Compressor Performance
with a 36-Point BACnet Controller
Steigerung der Leistung von DOAS-Kompres-
soren durch einen 36-Punkt-BACnet-Regler
A building complex had repeated Since the facility was commissioned, the Bringing in a Specialist
compressor and variable frequency drive compressors and variable frequency drives
failures in its outdoor air units caused by have required frequent replacement. A detailed To resolve the issue, the school district partnered
aggressive modulation control. Replacing investigation identified the root cause as overly with Insight Comfort Solutions LLC, a U.S.-
the controller stabilized operation, aggressive modulation control from the existing based controls contractor specializing in building
reduced equipment stress, and lowered control system. Rapid ramp-up and ramp-down automation systems (BAS).
maintenance costs. of compressor signals were placing excessive
In einem Gebäudekomplex gab es immer stress on mechanical components, leading to “The customer initially asked if I could take over
wieder Ausfälle der Kompressoren und premature failures. just the compressor modulation signal,” said
Frequenzumrichter einer Ventilationsanlage Chris, the Insight Comfort Solutions LLC contrac-
aufgrund aggressiver Regelkurven. Der System Overview tor who led this project. “But once we reviewed
Wechsel zum BAScontrol-E36 liefert sanfte the system capabilities, it became clear we could
Anläufe, schont die Anlage und senkt die The facility’s HVAC infrastructure included: deliver a more complete solution.”
Wartungskosten für den Betreiber. 05 water-source heat pumps (WSHPs)
1
9 outdoor air units, controlled by controllers Rethinking the Control Strategy
A U.S.-based educational facility operating in with expansion modules
a hot and humid climate experienced repeated 3 air handling units (AHUs) The original plan was a partial retrofit using a
failures of compressors and their associated A condenser water loop with cooling towers, Contemporary Controls BASpi-Edge controller.
variable frequency drives within its dedicated boilers, and two condenser water (CW) However, after evaluating system requirements
outdoor air units. pumps and future flexibility, the scope evolved into a full
controller replacement for the outdoor air units.
Control panel showing the final system architecture, featuring a BAScontrol-E36 primary controller, MS/TP-connected I/O expansion module,
and touchscreen interface to monitor and regulate compressor modulation for the outdoor air units.
Schalttafel mit der endgültigen Systemarchitektur, bestehend aus einer BAScontrol-E36-Hauptsteuerung, einem über MS/TP angeschlossenen E/A-Erweiterungsmodul und
einer Touchscreen-Schnittstelle zur Überwachung und Regelung der Außengeräte-Kompressorenmodulation. © Contemporary Controls
22 BACnet Europe Journal 45 09/26
