Rooftop units have come a long way in recent years. They now contain more sophisticated controls, improved serviceability features, and unique ways to address indoor air quality (IAQ) issues. But even the best-made rooftop can’t keep soldiering on if routine maintenance is not performed regularly.
Is it mold or is it gold? The latest “money-maker” for HVACR contractors may come from testing and remediation of mold and other indoor allergens. But is it worth the time, effort, and expense to become an indoor air quality (IAQ) expert, especially in testing for and remediation of mold?
Compressor hard-start devices are a luxury item for service technicians to use in rectifying a myriad of compressor start problems. The hard-start device can serve as an insurance policy for compressor starts when voltages drop to 90% of rated line conditions.
Rooftop units toil away during the day under hot conditions; consequently, their energy efficiency, as compared with chiller systems for building cooling, is generally much lower. One manufacturer, Calmac Corp., has created the Roofberg® system, which permits conventional rooftop units to be converted to a central chiller system with ice storage.
Universal Technical Institute (UTI) has been going strong since 1965. Recently, though, the institute has had to shut down its heating and air conditioning program at two campuses. But it has a few tricks up its sleeve to keep the HVACR program alive and in the minds of prospective students as a one-of-a-kind opportunity.
Contractors often lament the fact that a customer who is already getting cool air is a hard sell for maintenance and service work. What these customers may not realize is that this “If it ain’t broke, don’t fix it” attitude can be expensive.
Temperatures reaching 110 degrees F and no A/C — that’s what Pierce College students and faculty faced for more than five decades. Now, thanks to a new hybrid chiller system, this community college in California’s San Fernando Valley, northwest of Los Angeles, has campus-wide comfort year-round.