Digital scroll compressors
Greenheck’s Model ERCH, VER energy recovery ventilators gains digital scroll compressors, offering cooling capacity turndown from 10% to 100%.
Greenheck introduced digital scroll compressors in its Model ERCH and Model VER energy recovery ventilators to improve temperature and humidity control and save energy. Featuring an integral controller with a time-averaging sequence, the rate at which the scrolls are engaged and disengaged varies to match the required cooling capacity. Using digital scrolls for capacity control provides leaving air temperatures as precise as 1 F. In addition to precise temperature control, digital scrolls offer cooling capacity turndown from 10% to 100%. The compressor turndown results in longer cycle times that improve humidity control, reduce compressor wear, and eliminate the need for hot gas bypass to improve the overall efficiency of the system.
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Annual Salary Survey
In a year when manufacturing continued to lead the economic rebound, it makes sense that plant manager bonuses rebounded. Plant Engineering’s annual Salary Survey shows both wages and bonuses rose in 2012 after a retreat the year before.
Average salary across all job titles for plant floor management rose 3.5% to $95,446, and bonus compensation jumped to $15,162, a 4.2% increase from the 2010 level and double the 2011 total, which showed a sharp drop in bonus.