Careful consideration must be given to the refrigerant receiver in the design of new systems or when upgrading existing systems. Who hasn’t, at one time or another, experienced problems with this essential component? With its many connections, it is important to select the receiver that meets the system’s needs, as well as all applicable building codes.
Perhaps it is time to think of HFCs as only being conditional “long-term replacement” refrigerants for the air conditioning and refrigeration (ACR) industry. At the recent Purdue University Compressor and Refrigeration Conference, a number of papers looked at alternatives to HFCs, with CO2 being the most talked about.
Jerry Elam left a full-time contracting business to bake cookies. But his experience from his former occupation has been helpful in his new one. His baked goods business has grown so big that refrigeration is vital. And his company’s refrigeration systems have benefited from his expertise and that of his refrigeration equipment suppliers.
Potential or “voltage” relays are used with single-phase capacitor-start/capacitor-run motors, which need relatively high starting torque. Their main function is to assist in starting the motor. Knowing the sequence of operation for this type of starting relay can help you diagnose, confirm, or rule out certain service problems.
There are many conflicting reports regarding the future availability of HCFCs in general and of R-22 in particular. This article will summarize the current situation, to attempt to reduce the confusion that contractors and wholesalers may be feeling.
Geothermal and water-source heat pumps provide the potential for significant energy savings over the life of the equipment. But, naturally, these systems must be designed and applied properly to achieve maximum benefit. The following are some tips from several geothermal experts to help get a system off the ground — and into the ground — that is fully optimized.
Many miles above the earth, a satellite is getting signals from a device affixed to a service vehicle; in turn, the satellite is providing driving directions, geographic locations, plotting vehicle usage, and retrieving all kinds of customer information. Well, maybe not the last item — not yet. How does this new technology affect HVACR contractors and what can they expect down the road from systems using this same technology? That’s what The News set out to discover.
Wayne Whittamore has been teaching at the Great Oaks Institute of Technology in Cincinnati, OH, for the past 16 years. He says that his program has always been successful, especially when working with contractors and placing graduating students into jobs. But since Great Oaks earned accreditation through the Partnership for Air-Conditioning, Heating and Refrigeration Accreditation (PAHRA), Whittamore says he has seen even more success.
Nate and Ace are replacing another condensing unit during the cooling season. The equipment they are installing has been uncrated and installed according to the manufacturer’s installation instructions. They are about to charge the system.