Years ago, in some dank basement, a contractor installed a large air vent near the end of a steam main. Why did he do that and what happened? Read to find out.
Today’s high-efficiency furnaces rely on high-tech components to run efficiently. Although maintenance tips are few and simple, it never hurts to keep these tips fresh in the minds of service technicians.
Oil separators are essential on low and ultra-low temperature refrigeration systems and on large air conditioning systems up to 150 tons. Most compressor manufacturers require oil separators on all two-stage compressors.
Tim and Bob have been sent on a service call to a new customer’s house. The homeowner has an unusual complaint. She said that she thinks she has a furnace problem because there is mold in her house. They don’t know what this can be all about.
I simply don’t know of any way to reduce chiller maintenance (recommended scheduled maintenance), below industry standards and manufacturer recommendations, without reducing the system’s long-term efficiency and working life.
In addition to emitting less carbon dioxide and using less water, sustainably designed federal buildings cost 19 percent less to maintain, according to a report by the U.S. Department of Energy’s (DOE’s) Pacific Northwest National Laboratory (PNNL). The results are included in a white paper released by the General Services Administration (GSA).
Megohmmeters (meggers) are electrical meters used to check the resistance and condition of the motor windings and the condition of the refrigeration and oil environment around the motor windings. A megger is nothing but a giant ohmmeter that creates a very large dc voltage (usually 500 volts dc) from its internal battery.
Bob and Tim have arrived back at the apartment building where they have been working for several days inspecting and making necessary repairs to the building’s split-system heat pumps. Bob said, “Check the list for another unit that seemed to have a problem and let’s take a closer look at it.”
As an industry, whether an HVACR contracting firm is doing service and maintenance or installations, employees need to go to the jobsite to perform their work. Because installers and service technicians have to be on the road for their job, some going to several jobsites in a day, they need vehicles to drive.
In this situation we have a customer who has called for service on their gas furnace, and the description of the problem is “no heat at all.” The customer also reports that this is the first time they’ve had to call for service on their 10-year-old unit.
