A local Virginia facility engineer had an unusual, and mundane task to accomplish. In a newly completed housing building, the living quarters all are equipped with motion or occupancy sensor to increase the overall energy efficiency of the new building. With no motion in a particular room, the lights and HVAC systems are reduced or shut off. These particular occupancy sensors, illuminate utilizing a green LED when sensing motion. This however, in a darkened room is very bright and disturbed the occupants. The engineer found no published method to extinguish the LEDs, so he contacted the manufacturer. The manufacturer explained a procedure to accomplish this task. It was however a cumbersome task, especially when there were over 1100 of these sensors involved. The procedure goes something like this: Press the programming button 20 times, wait 1 second, press the button again 2 times, wait 1 second, press and hold the button 1 second, press the button 20 times. Can you imagine performing this procedure over 1100 times without a mistake?
Fortunately, he was already a user of the IDEC FT1A touch screen for other applications there. He designed and built the “jig” shown in this quick video, to program the occupancy sensors 5 at time, error free every time!
An efficient and fun project!
Posted in HMI, IDEC, Service stories, Uncategorized
Tagged applications, FT1A, HMI, IDEC, logic, programming, Touch Screen, video, Virginia
Lauren Vugveteen, Deltas new accounting manager, is shown here after joining and being installed as the newest member in the Richmond Chapter 141 of NAWIC.
This gallery contains 3 photos.
Tara is a Long Island, NY native that recently moved to Virginia with her family. Tara will be wearing a few different hats here, being our receptionist, bookkeeper, and sales assistant. She enjoys spending time with her family which includes two slightly spoiled Beagles.
Lauren is a Richmond native, recently graduating from Randolph Macon College in Ashland, VA with a degree in accounting. She was also a forward on the college basketball team.
Prolonged Failure Of A VFD Gets Political Attention In South Central VA Town – Situation Abated by Delta Automation Engineers And Sales Team.
Delta Automation received an emergency call from water authority officials to repair a variable frequency drive (VFD) that controlled a very important monumental fountain that was erected in memory of a prominent local citizen. The operation and maintenance of the fountain is funded from a private grant. The problem of the fountain being down for so long became a sensitive political issue that was escalated all the way to the office of the Mayor.
The primary reason a VFD was utilized in this application is because the spray from the fountain could get misdirected due to moderate wind. The VFD and hence its pump motor, is piloted by wind speed (via an anemometer). The lower the wind speed, the greater the force of the fountain spray and water volume output. As the wind speed increased, the VFD would act to slow the pump speed down thus reducing the fountain’s force and volume of water spray.
Once Delta was contacted about the problem, our field service engineers, Lee Gleason and Kevin Randolph went to the site to investigate the problem, determined that the VFD was damaged beyond repair and that a new VFD was needed. Delta engineers specified and selected a replacement WEG CFW 11 VFD that was available with a low cost, quick shipment option. Once the price quotation furnished by the Delta sales specialist, Win Bradley, was approved by the municipality, the drive was ordered and installed the following business day and the fountain was returned to service. Both the Mayor’s office and maintenance officials were extremely pleased with the rapid response by Delta Automation on this project. The political ‘fire’ was extinguished once the fountain had been restored to service.
Posted in Delta Automation, Delta company news, Delta service advantages, Service stories, Uncategorized, VFD, WEG
Tagged Delta Automation, drive, fountain, repair, Richmond VA., variable frequency drive, VFD, water, WEG
Several Variable Frequency Drives (VFDs) were sent into Deltas’ shop for repair. The clients’ complaint for them was that they were failing with an “Overtemp” fault. This is a very common fault/failure on all brands of VFDs. With only a very few exceptions, all VFDs have cooling fans, usually multiple cooling fans. All cooling fans have a finite life span. This lifespan is measured in run-time hours. It is typically several thousand hours, which usually translates into 3-5 years of 24/7 operation. Of course this rating is in a clean environment. The VFD depends upon air flow created by the cooling fans moving air across its’ heat sink fins to dissipate the heat generated by the high power components. The fans and the heat sinks on these VFDs sent if for repair, were completely blocked. Zero air flow was passing through these units. Consequently, they failed on “Over temperature”. Fortunately, the circuitry that detected the over temperature condition, protected the VFD from further damage.
These units, as the photos illustrate, show just how badly the units were blocked. These units required above what Delta typically refers to as a “Level 2” bench cleaning/P.M. service. These may have been a “Level 4” if such a level existed! They had to be completely disassembled, vacuumed, brushed, washed and scrubbed to get all of the foreign matter removed. Then they had to be reassembled and tested. This was to say the least, a very labor intensive process. That translates into a higher than normal cost for the client as well. Since these were large, high horsepower units, it was cost effective to perform the service. In this case, a more frequent preventive maintenance service would have prevented the complete shutdown of these units and would have not incurred the added cost of a bench level cleaning. Delta provides preventive maintenance (P.M.) plans tailored to the specific needs of our clients. Contact Delta at 804-236-2800.
Posted in Delta Automation, Delta service advantages, Service stories, Uncategorized, VFD
Tagged cooling fan, cooling fans, Delta Automation, drive, failed drive, fan failure, fans, lifespan, over temperature, overheatiing, overtemp, PM, Preventive Maintenance, repair, Richmond VA., variable frequency drive, VFD, vfd fault