Here is the potential problem: A contractor quotes a customer on the compressor replacement, and he agrees to repair the cooler at the quoted price. Then, as the technician is completing the job — or even after he has finished replacing the compressor — he finds out there is another system problem.
Consider the same system as last month’s column — a medium-temperature refrigeration system incorporating a liquid high-side receiver, a TXV as the metering device, and R-134a refrigerant — but the measured and calculated values are listed in Table 2, along with this detailed system analysis.
Bob and Tim are going out to a new job. It’s an air cooled chiller on the rooftop of an office building. This is the first air cooled chiller that Tim has ever seen so Bob is going to have to describe the operation of the chiller to Tim.
Whether designed for a hospitality, higher education, or multifamily housing application, it is important for HVAC technology to meet current energy and comfort standards.
Technicans are in a unique position in the HVAC contracting world because they often act as both a serviceman and salesperson. Some companies even push for their service techs to sell, offering cash bonuses or other incentives.