This time around our problem centers on a split-system air conditioner. The condensing unit is 240-volt, single-phase, and the indoor air handler (which our customer is able to tell us is “blowing warm air”) consists of a standard gas furnace and an A-coil housed above the furnace plenum.
How do I get my employees motivated? How do I get the phones to ring more? How do I keep busy all year long and avoid the slow seasons? How do I make more profitable sales? Just about every service contractor complains about one or more of these issues, but they all can be eliminated with very little effort.
Now that the nation is finally showing signs of emerging from the worst recession since the 1930s, the latest long-range seasonal forecast from the National Weather Service indicates HVAC contractors may get some relief from the cold, hard times of the last couple of years with a hotter than normal summer in much of the country.
This article, reprinted from an EXHAUSTO white paper, discusses the benefits of demand-controlled ventilation (DCV) systems in multi-story, multi-residential buildings, which include improving building energy efficiency, enhancing comfort and other key performance factors. It reviews the application of DCV in new, retrofit and renovated building projects.
This job is a three-story office building with an air handler on each floor with a refrigerant coil in each air handler. A 75-ton condensing unit serves the three 25-ton air coils. This is an old system that has still been doing a good job. The complaint is that the second floor unit is not holding the conditions that the thermostat is set for.
New York state homeowners now have an added incentive to install micro-combined heat and power (micro-CHP) systems. The New York State Public Service Commission approved tariff filings that pave the way for homeowners who install the systems to receive credit for excess electricity they generate and sell back to their utilities.
If a sheave is not balanced, it will have an inherent uneven distribution of weight. This uneven weight distribution magnifies vibration and noise when rotated and as speed of rotation increases. Unbalanced sheaves can also lead to premature life of other drive components due to the vibration and stresses placed on the components.
Last October, President Barack Obama signed the National Defense Authorization Act (NDAA) of 2010 into law. Among other things, the amended NDAA expands the number of employees who are eligible to take Family Medical Leave Act (FMLA) qualifying leave. In this case, it is to care for sick or injured family members in the military.
Facility managers are hunting for ways to operate more efficiently and conserve energy. We know more now than we did even a few years ago about where to look for unnecessary waste. We also know how to quantify the dollar value of that opportunity. That allows you to create a more accurate proposal that’s more likely to be approved and achieved.
In steam systems that have not been maintained for three to five years, between 15 percent to 30 percent of the installed steam traps may have failed - thus allowing live steam to escape into the condensate return system. In systems with a regularly scheduled maintenance program, leaking traps should account for less than 5 percent of the trap population.
RSS