Equipment Knowledge

Equipment Knowledge

Understanding Shaft Alignment: Determining Accurate Alignment Targets

This machine had a long history of coupling and bearing failures. Over a two-year period several attempts were made to calculate the thermal growth on the motor and compressor supports. The original equipment manufacturer’s (OEM) technical manual gave a vertical thermal offset value of +0.04 in. (+40 mils). There were no recommendations for a target vertical angularity. Horizontal alignment changes were not mentioned.

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Equipment Knowledge

Achieving “Near Zero” Refrigerant Emissions in HVAC Systems

Chillers and their refrigerants require ongoing preventative maintenance. Preventing refrigerant from leaving, preventing air from entering, and preserving refrigerant quality are all a part of chiller maintenance. By maintaining your chillers and by preventing chiller leaks you will also keep your operating costs down.

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