Kele Community Blog

Late one afternoon not long ago, a fellow got me on the phone for tech support. He said he had ten carbon dioxide transmitters on one DCP-1.5-W power supply, and they weren’t operating, and he had pulled out most of his hair. Each transmitter needs less than 100 mA to operate, so the 1.5A power supply should have been more than enough.

He had applied power to the transmitters one by one, and all was well until he connected the fifth unit. At that point, the voltage dropped from 24 volts to 6, and it continued to drop bit by bit as he connected additional units. He checked everything, he said—he even powered up each individual unit directly from the power supply—and they were all just fine. What to do?  (Continue Reading)

We sold a variety of equipment on a job here in St. Louis County, consisting of fans, fire dampers, fire/smoke dampers, and grills. The fire/smoke dampers were to have factory-mounted actuators with end switches. But the salesman, when releasing the order for production, somehow deleted the end switches.

After the arrival of the equipment on the job, it was discovered that the actuators did not have end switches. We set out to find a solution to our problem without having to replace the actuators. Since the actuators were Belimo, Greenheck, the manufacturer of the dampers, contacted Belimo and was provided with a positioning switch for this application.

The switches were installed and the electrical inspector called for final inspection. The devices were rejected because the area was a return plenum, and the devices were not plenum rate.

We started checking for another switch that was plenum rated, because Belimo did not have one. That’s when I found Kele. (Continue Reading)