Bob and Tim were at a retail store where the manager had called and said there was no cooling. The system was a 5-ton heat pump. After talking to the manager, Bob and Tim turned the thermostat to the “fan on” position to see if there was power to the unit and the indoor fan started. The heat pump was a split system, so they went up to the roof.
If refrigerant migration occurs in a system that has a crankcase heater, the vapor will be forced away from the crankcase and end up in the suction line. This refrigerant may condense in the suction line and cause slugging in the compressor’s cylinders on startup.
Thinking in temperature in-stead of pressure can help make the crossover to a new refrigerant much easier. The next time you’re faced with determining the correct operating evaporator or condensing pressure, think in terms of temperature and then convert it to pressure.
Second Webinar in Company’s Getting Comfortable with Designer Air Series
May 20, 2015
Emerson Climate Technologies Inc. has announced the second webinar in its Getting Comfortable with Designer Air series, “Modulation Technologies: Designing Great Commercial Atmospheres,” set for May 27, 2015.
Low-GWP Refrigerants Approved for Scroll, Semi-Hermetic Compressors
May 4, 2015
Emerson Climate Technologies has approved DuPont Opteon® XP40 (R-449A) and XP10 (R-513A) for use in a wide range of its scroll and semi-hermetic compressors. This approval paves the way for the use of Opteon refrigerants in new and existing compressors for a number of refrigeration applications.
The company, which has 628 full-time employees at its Bristol location, will first move 50 seasonal workers into permanent positions. Another 60 jobs will be added by the end of April, bringing the number of full-time positions to 738 at the Bristol site.