Rooftop package unit diagnostician

Patent · Tue Aug 17 00:00:00 EDT 2004

OSTI ID:1007796

Chassin, David P ^[1]; Pratt, Robert G ^[2]; Reid, Larry Dean ^[3]

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1. Pasco, WA
2. Kennewick, WA
3. Benton City, WA

A diagnostic system for an HVAC system includes a number of sensors used to measure the operation of the HVAC system. Sensor readings are measured by timing the delay between when a strobe signal is sent to a sensor and when an interrupt signal from the sensor is received. A device driver used to measure the sensor readings stores the sensor readings in pseudo-character device files, which are universally accessible by different subsystems of the diagnostic system. Based on the readings from these sensors, this diagnostic system is able to determine the operational status of the HVAC system and if an economizer in the HVAC system is operating properly.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC06-76RL01830
• Assignee: Battelle Memorial Institute (Richland, WA)
• Patent Number(s): 6,778,945
• Application Number: 10/020,849
• OSTI ID: 1007796
• Country of Publication: United States
• Language: English