Emerson PRN104H21 Digital Input/Output Module

Emerson PRN104H21 Digital Input/Output Module

Brand: EMERSON

Module: PRN104H21

Description: Digital Input/Output Module

Product Orgin: USA

Another important step in effectively cleaning a system before operation is proper evacuation. Air is very detrimental to refrigeration systems and must be removed before start up and after field service. Blowing out lines with dry nitrogen may remove a major part of the air from a system, but if air is trapped in the compressor during installation it is practically impossible to remove from the compressor crankcase by purging with nitrogen. New and replacement compressors are shipped from the factory with a dry air holding charge, and must be evacuated before being put in service.

Introduction to Xiongba Industrial Control