McQuay MDS030A Design & Installation Guide

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Design & installation Guide For McQuay MDS Multi System
4.3.３ exchange way of Nitrogen gas (when welding copper tube)
Suppose no nitrogen gas is injected into refrigerant pipe when welding, the oxide air bubble will
come into being in the internal surface of tube. This will result in some damage to the system. In
order to avoid these, nitrogen gas should be injected into refrigerant pipe when welding, this
process is called nitrogen gas exchange method. This is the standard operation process of
welding.
Note:
The gas must be Nitrogen.
Pressure adjustor must be used.

McQuay MDS030A Specifications

General

Brand	McQuay
Model	MDS030A
Category	Air Conditioner
Language	English