THE BIBLE OF PULLING VACUUMS ON HVACR SYSTEMS

Supposedly this book is out of print but if you hunt for it, a few copies may still be available. This Bible contains all the information needed to understand the theory and execution of VACUUMS on refrigeration systems. It validates the notion that bigger and shorter is better when attaching a vacuum pump to a system. It is IMHO, the authority on this subject, bar none. Every service engineer needs to read and comprehend the information found inside.